Abstract:
The application is directed to a diesel engine. If the rack cannot complete a predetermined operation within a predetermined amount of time due to the key switch being held at a start-position, the control unit controls a starter to cause a plunger to perform a preparatory stroke operation, and the stroke operation by the plunger is stopped before the diesel engine starts.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the benefit of PCT Application No. PCT/JP2014/72580 filed on Aug. 28, 2014, the contents of which are herein incorporated by reference. 
     
    
     TECHNICAL FIELD 
       [0002]    The present invention relates to a diesel engine. 
       BACKGROUND ART 
       [0003]    Conventionally, an art of a diesel engine in which a starter is operated following operation of a key switch is known (for example, see the Patent Literature 1). 
         [0004]    In some of the conventional diesel engines, when the key switch is operated from an OFF position to an ON position, operation inspection of a rack is performed. The operation inspection of the rack is that a predetermined operation is performed by the rack and whether the rack finishes the predetermined operation for a predetermined period of time or not is judged. As a result of the operation inspection of the rack, when the operation of the rack is judged to be abnormal, a control device of the diesel engine checks starting of the diesel engine by a starter. 
         [0005]    As a cause of the judgment that the operation of the rack is abnormal, a problem is mentioned that a film of fuel or the like formed on an outer perimeter of a plunger, and as a result, the plunger is adhered and hardly to be rotated. 
         [0006]    Accordingly, when the operation of the rack is judged to be abnormal and the starting of the diesel engine is checked, an operator removes manually the film of fuel or the like formed on the outer perimeter of the plunger. 
         [0007]    However, it takes time and effort, whereby smooth starting of the diesel engine may be difficult. 
       PRIOR ART REFERENCE 
     Patent Literature 
       [0008]    Patent Literature 1: the Japanese Patent Laid Open Gazette 2009-197739 
       DISCLOSURE OF INVENTION 
     Problems to be Solved by the Invention 
       [0009]    The present invention provides a diesel engine which can be started smoothly even if a film of fuel or the like formed on an outer perimeter of a plunger, and as a result, the plunger is adhered and hardly to be rotated. 
       Means for Solving the Problems 
       [0010]    A diesel engine described in claim  1  includes a fuel injection pump whose fuel injection amount is adjusted by moving a rack so as to change a rotation position of a plunger, an actuator operating the rack, a starter making the plunger perform stroke operation, and a control unit controlling the actuator and the starter following operation of a key switch. The control unit makes the rack perform predetermined operation by the actuator when the key switch is operated from an OFF position to an ON position, and if the rack cannot finish the predetermined operation for a predetermined period of time, on condition that the key switch is held at a START position, the control unit makes the plunger perform stroke operation by the starter and makes the plunger perform preliminary stroke operation which stops the stroke operation of the plunger before starting the diesel engine. 
         [0011]    In a diesel engine described in claim  2 , after making the plunger perform the preliminary stroke operation by the starter, the control unit makes the rack perform the predetermined operation by the actuator again. 
         [0012]    In a diesel engine described in claim  3 , when the rack cannot finish the predetermined operation for the predetermined period of time while the control unit repeats by turns the process in which the rack is made perform the predetermined operation by the actuator and the process in which the plunger is made perform the preliminary stroke operation by the starter for a predetermined number of times, the control unit checks the starting of the diesel engine by the starter. 
         [0013]    In a diesel engine described in claim  4 , the control unit releases the check of the starting of the diesel engine by the starter when the key switch is operated from the ON position to the OFF position. 
         [0014]    A diesel engine described in claim  5  includes a notice means which notifies an operator that the control unit checks the starting of the diesel engine by the starter. 
         [0015]    A diesel engine described in claim  6  includes a position detection device detecting a position of the rack and an output value detection device detecting an output value of the actuator. At the time at which the actuator makes the rack to perform the predetermined operation, the control unit obtains information about a detection value of the position of the rack from the position detection device and obtains information about a detection value of the output value of the actuator from the output value detection device, calculates a difference between the detection value of the position of the rack and a target position of the rack stored previously and corresponding to the output value of the actuator, and judges that the rack cannot finish the predetermined operation for the predetermined period of time when the difference is not less than a predetermined value. 
       Effect of the Invention 
       [0016]    The present invention takes effect that a diesel engine can be started smoothly even if a film of fuel or the like formed on an outer perimeter of a plunger, and as a result, the plunger is adhered and hardly to be rotated. 
     
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         [0017]      FIG. 1  is a drawing of a schematic configuration of a diesel engine of a first embodiment. 
           [0018]      FIG. 2  is a sectional view of a fuel injection pump. 
           [0019]      FIG. 3  is a diagram of a map α. 
           [0020]      FIG. 4  is a flow chart of operation of the diesel engine. 
           [0021]      FIG. 5  is an example of a time chart of operation of the diesel engine corresponding to operation of a key switch. 
           [0022]      FIG. 6  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0023]      FIG. 7  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0024]      FIG. 8  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0025]      FIG. 9  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0026]      FIG. 10  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0027]      FIG. 11  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0028]      FIG. 12  is a diagram of the map α. 
           [0029]      FIG. 13  is a drawing of a schematic configuration of a diesel engine of a second embodiment. 
           [0030]      FIG. 14  is a sectional view of the fuel injection pump. 
           [0031]      FIG. 15  is a flow chart of operation of the diesel engine. 
           [0032]      FIG. 16  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0033]      FIG. 17  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0034]      FIG. 18  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0035]      FIG. 19  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0036]      FIG. 20  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0037]      FIG. 21  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0038]      FIG. 22  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0039]      FIG. 23  is a drawing of a schematic configuration of a modification of the diesel engine of the second embodiment. 
           [0040]      FIG. 24  is a drawing of a schematic configuration of a diesel engine of a third embodiment. 
           [0041]      FIG. 25  is a sectional view of the fuel injection pump. 
           [0042]      FIG. 26  is a flow chart of operation of the diesel engine. 
           [0043]      FIG. 27  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0044]      FIG. 28  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0045]      FIG. 29  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0046]      FIG. 30  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0047]      FIG. 31  is an example of a time chart of operation of the diesel engine corresponding to operation of the key switch. 
           [0048]      FIG. 32  is a schematic drawing of a first embodiment of an attachment structure of a sub actuator. 
           [0049]      FIG. 33  is a schematic drawing of a second embodiment of the attachment structure of the sub actuator. 
           [0050]      FIG. 34  is a schematic drawing of a third embodiment of the attachment structure of the sub actuator. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     First Embodiment 
       [0051]    Firstly, a diesel engine  1  which is a first embodiment of a diesel engine of the present invention is explained. 
         [0052]    As shown in  FIG. 1 , the diesel engine  1  has an engine body  10 , a fuel injection pump  30 , a starter  60  and a control unit  70 . 
         [0053]    The engine body  10  is a main structure of the diesel engine  1 . 
         [0054]    The engine body  10  has a cylinder block  12  and a cylinder head  13  disposed at an upper end of the cylinder block  12 . A plurality of cylinders  11  are provided in the cylinder block  12 . A piston  14  is slidably inserted into each of the cylinders  11 . A crankshaft  16  is connected via a connecting rod  15  to the piston  14 . A combustion chamber  17  is formed between an upper end of the piston  14  and a lower end of the cylinder head  13 . An intake port  18  and an exhaust port  19  are formed in the cylinder head  13 . An intake valve  20  and an exhaust valve  21  which open and close openings at the side of the combustion chamber  17  are arranged respectively in the intake port  18  and the exhaust port  19 . A fuel injection nozzle  22  is provided in the cylinder head  13  so that a tip thereof is projected into the combustion chamber  17 . 
         [0055]    The diesel engine  1  repeats an intake stroke, a compression stroke, an expansion stroke and an exhaust stroke sequentially so as to generate driving power. 
         [0056]    In the intake stroke, the piston  14  falls to a bottom dead center while the intake port  18  is opened so as to supply outside air via the intake port  18  into the combustion chamber  17 . 
         [0057]    In the compression stroke, the piston  14  rises to a top dead center while the intake port  18  and the exhaust port  19  are closed so as to compress air in the combustion chamber  17 . By this compression, temperature of the air in the combustion chamber  17  is raised. Then, near the end of the compression stroke, fuel is injected from the fuel injection nozzle  22 . The fuel is ignited naturally and burnt. 
         [0058]    In the expansion stroke, the temperature and pressure are raised suddenly by the combustion of the fuel, and the piston  14  falls to the bottom dead center. 
         [0059]    In the exhaust stroke, the piston  14  rises to the top dead center while the exhaust port  19  is opened, and gas generated by the combustion of the fuel (exhaust gas) flows out from an inside of the combustion chamber  17  via the exhaust port  19 . 
         [0060]    The fuel injection pump  30  supplies fuel to the fuel injection nozzle  22 . 
         [0061]    As shown in  FIG. 2 , the fuel injection pump  30  has a hydraulic head  31  and a pump housing  32  connected to a lower part of the hydraulic head  31 . A plunger barrel  33  is inserted into the hydraulic head  31 , and a plunger  34  is arranged slidably vertically in the plunger barrel  33 . In an outer peripheral surface of the plunger  34 , a plunger lead  34   a  is formed. The plunger lead  34   a  is a spiral groove. Below the plunger  34 , a lower spring bracket  35  is arranged via a spring. At a lower end of the lower spring bracket  35 , a roller-like tappet  36  is pivoted rotatably. A cam  37  contacts the tappet  36 . The cam  37  is fixed to a camshaft  38 . The camshaft  38  is connected via a gear (not shown) to the crankshaft  16  of the engine body  10 . The camshaft  38  (the cam  37 ) is rotated following rotation of the crankshaft  16 , and as a result, the plunger  34  is stroked vertically. 
         [0062]    Fuel sent pressingly from a fuel supply part (not shown) is supplied to a main port  39  provided in the plunger barrel  33 . When the plunger  34  moves to a lowest position in a vertical movable range (bottom dead center), a fuel pressure chamber  40  formed above the plunger  34  in the plunger barrel  33  is communicated with the main port  39 , and the fuel is introduced into the fuel pressure chamber  40 . 
         [0063]    On the other hand, when the plunger  34  is pushed up by the cam  37  and raised, a communication port of the main port  39  to the fuel pressure chamber  40  is closed by an outer wall of the plunger  34 . 
         [0064]    As a result, fuel in the fuel pressure chamber  40  is sent pressingly via a distribution port  41  to a distribution shaft  42  following rising of the plunger  34 . Then, the fuel sent pressingly to the distribution shaft  42  is distributed to a delivery valve  43  by the distribution shaft  42 , passes through an injection pipe  44 , and is injected from the fuel injection nozzle  22  of the engine body  10 . 
         [0065]    When the plunger  34  is raised further, the plunger lead  34   a  formed in the plunger  34  is communicated with the main port  39 , and an inside of the plunger barrel  33  is communicated with the main port  39 . 
         [0066]    As a result, fuel in the plunger barrel  33  flows reversely to a side of the fuel supply part of the main port  39 . Namely, fuel injection by the fuel injection pump  30  is stopped. 
         [0067]    A gear (not shown) is formed in the outer peripheral surface of the plunger  34  and is meshed with a rack  45 . The rack  45  is supported movably reciprocally by the pump housing  32 . In this embodiment, the rack  45  is supported movably reciprocally between end positions P 1  and P 2 . The rack  45  is connected via a control lever  46  and a link lever  47  to a sliding shaft  48   a  of an actuator (solenoid)  48 . Between the sliding shaft  48   a  of the actuator  48  and the link lever  47 , a governor spring  49  is provided. The governor spring  49  biases the rack  45  toward the end position P 1  via the link lever  47 . Accordingly, when the actuator  48  is not energized, the rack  45  exists at the end position P 1  in the movable range P 1  to P 2 . 
         [0068]    By moving the sliding shaft  48   a  reciprocally, the actuator  48  moves the rack  45  reciprocally via the link lever  47  and the control lever  46 . Following reciprocal movement of the rack  45  by the actuator  48 , the plunger  34  is rotated around its axis. 
         [0069]    By changing a rotation position of the plunger  34  by the actuator  48 , timing of communication of the plunger lead  34   a  with the main port  39  at the time of rising of the plunger  34  is changed. As a result, fuel injection amount of the fuel injection pump  30  is changed. 
         [0070]    A position detection device  50  detecting a position of the rack  45  is connected to the rack  45 . 
         [0071]    An output value detection device  51  detecting an output value of the actuator  48  (current value flowing in the actuator  48 ) is connected to the actuator  48 . 
         [0072]    The starter  60  starts the diesel engine  1 . 
         [0073]    As shown in  FIG. 1 , the starter  60  has an electric engine. The starter  60  is connected to the crankshaft  16  of the engine body  10  and can rotate the crankshaft  16 . Following rotation of the crankshaft  16 , the starter  60  can stroke vertically the plunger  34 . 
         [0074]    By rotating the crankshaft  16 , the starter  60  starts the diesel engine  1 . Start of the diesel engine  1  means the state that the intake stroke, the compression stroke, the expansion stroke and the exhaust stroke are realized sequentially while the starter  60  is stopped. 
         [0075]    The control unit  70  controls the actuator  48  and the starter  60 . 
         [0076]    As shown in  FIG. 1 , a key switch  80  is connected to the control unit  70 . 
         [0077]    The key switch  80  is an operation instrument for starting and stopping the diesel engine  1 . The key switch  80  can be shifted to an OFF position, an ON position or a START position. When the key switch  80  is operated to the OFF position, the starter  60  and the control unit  70  are not energized and stopped. When the key switch  80  is operated to the ON position, the actuator  48 , the starter  60  and the control unit  70  are energized and can be operated. When the key switch  80  is operated from the ON position to the START position, the control unit  70  operates the starter  60  and executes various control programs for starting the diesel engine  1 . 
         [0078]    The control unit  70  is connected to the actuator  48  and can change the rotation position of the plunger  34  by operating the actuator  48  so as to change the position of the rack  45 . By changing the rotation position of the plunger  34 , the control unit  70  adjusts the fuel injection amount of the fuel injection pump  30 . 
         [0079]    The control unit  70  is connected to the starter  60  and can rotate the crankshaft  16  by operating the starter  60  so as to stroke the plunger  34 . By operating the starter  60  so as to rotate the crankshaft  16 , the control unit  70  can start the diesel engine  1 . 
         [0080]    The control unit  70  is connected to the position detection device  50  and can obtain information about a detection value of the position of the rack  45  from the position detection device  50 . 
         [0081]    The control unit  70  is connected to the output value detection device  51  and can obtain information about a detection value of the output value of the actuator  48  from the output value detection device  51 . 
         [0082]    As shown in  FIG. 3 , a map α is stored in the control unit  70 . The map α maps correlation of the output value A of the actuator  48  and the position P of the rack  45  in the case in which the rack  45  is operated normally following drive of the actuator  48 . As shown in the map α, the output value A of the actuator  48  is increased following movement of the rack  45  from the end position P 1  toward the end position P 2 , and the output value A of the actuator  48  is reduced following movement from the end position P 2  toward the end position P 1 . That is because the rack  45  is biased toward the end position P 1  by the governor spring  49  and biasing power of the governor spring  49  is increased following movement of the rack  45  toward the end position P 2 . 
         [0083]    Steps in the case in which the control unit  70  control the operations of the actuator  48  and the starter  60  following the operation of the key switch  80  are explained referring to  FIGS. 4 to 11 . 
         [0084]    At a step S 1 , the key switch  80  is operated from the OFF position to the ON position. 
         [0085]    Accordingly, the actuator  48 , the starter  60  and the control unit  70  are energized. 
         [0086]    At a step S 2 , as shown in  FIGS. 5 to 11 , when the key switch  80  is operated from the 
         [0087]    OFF position to the ON position, the control unit  70  checks starting of the diesel engine  1  by the starter  60  (provisional check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0088]    At a step S 3 , as shown in  FIGS. 5 to 11 , the control unit  70  performs operation inspection of the rack  45 . 
         [0089]    The operation inspection of the rack  45  is that a predetermined operation X is performed by the rack  45  and whether the rack  45  finishes the predetermined operation X for a predetermined period Ta or not is judged. 
         [0090]    The predetermined operation X is movement of the rack  45  throughout the movable range P 1  to P 2 . In this embodiment, the control unit  70  moves the rack  45  to the end position P 1 , the end position P 2  and the end position P 1  in this order. 
         [0091]    The predetermined period Ta is a period of time required normally for finishing the predetermined operation X of the rack  45  when the rack  45  is operated normally following driving of the actuator  48 . Information about the predetermined period Ta is stored previously in the control unit  70 . 
         [0092]    As shown in  FIG. 5 , when the rack  45  finishes the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is normal. 
         [0093]    As shown in  FIGS. 6 to 11 , when the rack  45  does not finish the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is abnormal. 
         [0094]    When the operation of the rack  45  is judged to be normal (strep S 3 , normal), the control unit  70  shifts to a strep S 4 . 
         [0095]    When the operation of the rack  45  is judged to abnormal normal (strep S 3 , abnormal), the control unit  70  shifts to a strep S 7 . 
         [0096]    At the step S 4 , the control unit  70  releases the provisional check. Accordingly, when the key switch  80  is operated to the START position, the starter  60  is operated. 
         [0097]    At a step S 5 , the control unit  70  judges whether the key switch  80  is operated to the START position or not. 
         [0098]    When the key switch  80  is not operated to the START position and is at the ON position, the control unit  70  stands by until the key switch  80  is operated to the START position. Namely, the control unit  70  does not operate the starter  60  and does not start the diesel engine  1 . 
         [0099]    When the key switch  80  is operated to the START position, the control shifts to a step S 6 . 
         [0100]    At the step S 6 , as shown in  FIG. 5 , the control unit  70  operates the starter  60  so as to start the diesel engine  1 . 
         [0101]    At the step S 7 , the control unit  70  judges whether the key switch  80  is operated to the START position or not. 
         [0102]    When the key switch  80  is not operated to the START position and is at the ON position, the control unit  70  stands by until the key switch  80  is operated to the START position. 
         [0103]    When the key switch  80  is operated to the START position, the control shifts to the step S 8 . 
         [0104]    At the step S 8 , as shown in  FIGS. 6 to 11 , the control unit  70  makes the plunger  34  perform preliminary stroke operation on condition that the key switch  80  is held at the START position. Making the plunger  34  perform the preliminary stroke operation means that the plunger  34  is made perform stroke operation by the starter  60  and the stroke operation of the plunger  34  is finished before starting the diesel engine  1 . In this embodiment, the control unit  70  energizes the starter  60  for a predetermined energizing period Tb so as to make the plunger  34  perform the preliminary stroke operation. A length of the predetermined energizing period Tb is set so as not to start the diesel engine  1  and found previously. Information about the predetermined energizing period Tb is stored previously in the control unit  70 . In this embodiment, when the starter  60  is energized for the predetermined energizing period Tb, that is, when the plunger  34  performs the preliminary stroke operation, the plunger  34  moves for one stroke. Until the plunger  34  performs the preliminary stroke operation, the control unit  70  releases temporarily the provisional check. 
         [0105]    As shown in  FIG. 9 , when the key switch  80  is at the ON position after the operation inspection of the rack  45 , the control unit  70  stands by until the key switch  80  is operated from the ON position to the START position and makes the plunger  34  perform the preliminary stroke operation after the key switch  80  is operated to the START position. 
         [0106]    As shown in  FIG. 8 , when the key switch  80  is operated from the START position to the ON position before the predetermined energizing period Tb passes, the control unit  70  stops the starter  60  and interrupts the preliminary stroke operation of the plunger  34 . In this case, though the starter  60  is operated for a period Tb′ (Tb′&lt;Tb), the control unit  70  regards that the preliminary stroke operation of the plunger  34  is finished, and shifts to a step S 9 . 
         [0107]    At the step S 9 , as shown in  FIGS. 6 to 11 , the control unit  70  stands by for a predetermined standby period Tc. The predetermined standby period Tc is a period of time required for stopping completely the plunger  34  moving from habit after performing the preliminary stroke operation at the step S 8 . Information about the predetermined standby period Tc is stored previously in the control unit  70 . By standing by for the predetermined standby period Tc, accuracy of the operation inspection of the rack  45  at the step S 10  can be improved. 
         [0108]    At the step S 10 , as shown in  FIGS. 6 to 11 , after the predetermined standby period Tc passes, the control unit  70  performs the operation inspection of the rack  45  again. 
         [0109]    On condition that the key switch  80  is held at the ON position or the START position, the control unit  70  can perform the operation inspection of the rack  45 . Accordingly, as shown in  FIG. 11 , at the time of the operation inspection of the rack  45 , when the key switch  80  is operated to the OFF position, the operation inspection of the rack  45  is interrupted. 
         [0110]    As shown in  FIG. 6 , when the operation of the rack  45  is judged to be normal (step S 10 , normal), the control unit  70  shifts to the step S 4 . 
         [0111]    When the operation of the rack  45  is judged to be abnormal (step S 10 , abnormal), the control unit  70  shifts to the step S 11 . 
         [0112]    At the step S 11 , as shown in  FIGS. 7 to 10 , the control unit  70  performs error judgement and checks starting of the diesel engine  1  by the starter  60  (regular check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0113]    At a step S 12 , after the control unit  70  performs the regular check, when the key switch  80  is operated to the OFF position (step S 12 , Yes), the control shifts to a step S 13 . 
         [0114]    At the step S 12 , after the control unit  70  performs the regular check, when the key switch  80  is held at the ON position or the START position (step S 12 , No), the error judgement and the regular check are held. 
         [0115]    At the step S 13 , as shown in  FIG. 10 , when the key switch  80  is operated to the OFF position, the regular check and the error judgement are released. Accordingly, after that, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 1 . 
         [0116]    As shown in  FIG. 11 , when the key switch  80  is operated to the OFF position while the processes shown in the steps S 1  to S 11  are performed, the processes are interrupted. Subsequently, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 1 . 
         [0117]      FIGS. 5 to 11  are time charts of the operation of the diesel engine  1  corresponding to the operation of the key switch  80 . 
         [0118]    As shown in  FIG. 5 , the control unit  70  judges that the first rack operation inspection is normal, and starts the diesel engine  1 . 
         [0119]      FIG. 5  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 4 , the step S 5  and the step S 6  in this order in the flow chart (see  FIG. 4 ). 
         [0120]    As shown in  FIG. 6 , the control unit  70  judges that the first rack operation inspection is abnormal and the second rack operation inspection is normal, and starts the diesel engine  1 . 
         [0121]      FIG. 6  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10 , the step S 4 , the step S 5  and the step S 6  in this order in the flow chart (see  FIG. 4 ). 
         [0122]    As shown in  FIG. 7 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0123]      FIG. 7  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10  and the step S 11  in this order in the flow chart (see  FIG. 4 ). 
         [0124]    As shown in  FIG. 8 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0125]      FIG. 8  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10  and the step S 11  in this order in the flow chart (see  FIG. 4 ). 
         [0126]    As shown in  FIG. 9 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0127]      FIG. 9  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10  and the step S 11  in this order in the flow chart (see  FIG. 4 ). 
         [0128]    As shown in  FIG. 10 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. Then, since the key switch  80  is operated to the OFF position, the control unit  70  releases the regular check. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 1 . 
         [0129]      FIG. 10  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10 , the step S 11 , the step S 12 , the step S 13 , the step S 1 , the step S 2 , the step S 3 , the step S 7  and the step S 8  in this order in the flow chart (see  FIG. 4 ). 
         [0130]    As shown in  FIG. 11 , the control unit  70  judges that the first rack operation inspection is abnormal. Then, since the key switch  80  is operated to the OFF position in the midst of the second rack operation inspection, the control unit  70  interrupts the second rack operation inspection. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 1 . 
         [0131]      FIG. 10  shows a time chart of the operation of the diesel engine  1  when the steps shifts to the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9 , the step S 10 , the step S 1 , the step S 2 , the step S 3 , the step S 7 , the step S 8 , the step S 9  and the step S 10  in this order in the flow chart (see  FIG. 4 ). 
         [0132]    According to the above configuration, even if the plunger  34  is adhered by a film of fuel or the like formed on an outer perimeter of the plunger  34  and the plunger  34  is hardly to be rotated and as a result the operation of the rack  45  is judged to be abnormal by the control unit  70  at the step S 3 , the control unit  70  makes the plunger  34  perform the preliminary stroke operation by the starter  60  so as to remove the film of fuel or the like as shown in the step S 8 . Accordingly, the diesel engine  1  can be started smoothly. 
         [0133]    As shown in  FIGS. 7 to 10 , in this embodiment, the control unit  70  can perform the operation inspection of the rack  45  up to twice before performing the regular check (error judgement). However, the present invention is not limited thereto, and the control unit  70  may perform the operation inspection of the rack  45  two or more times before performing the regular check. 
         [0134]    Namely, when the rack  45  cannot finish the predetermined operation X for the predetermined period Ta until the control unit  70  repeats by turns the operation inspection of the rack  45  (the process in which the rack  45  is made perform the predetermined operation X by the actuator  48 ) and the process in which the plunger  34  is made perform the preliminary stroke operation by the starter  60  (see the step S 8 ) for a predetermined number of times N, the control unit  70  checks the starting of the diesel engine  1  by the starter  60  (regular check). The predetermined number of times N can be set freely by an operator or the like. 
         [0135]    For example, in the case in which the control unit  70  can perform the operation inspection of the rack  45  for three times before the regular check, when the regular check is performed, the control unit  70  performs the operation inspection of the rack  45  (first time), the abnormality judgement, the preliminary stroke operation of the plunger  34 , the operation inspection of the rack  45  (second time), the abnormality judgement, the preliminary stroke operation of the plunger  34 , the operation inspection of the rack  45  (third time), the abnormality judgement, and the regular check in this order. 
         [0136]    The diesel engine  1  may have a notice means  90  which notifies an operator that the control unit  70  checks the starting of the diesel engine  1  by the starter  60  (regular check). 
         [0137]    For example, the notice means  90  is configured by a voice generating means or a picture display means. As shown in  FIG. 1 , the notice means  90  is connected to the control unit  70 . 
         [0138]    Operation of the notice means  90  is explained below. 
         [0139]    At the step S 11 , when the regular check is performed, the control unit  70  transmits an error signal to the notice means  90 . Then, when the error signal is received, the notice means  90  notifies an operator that the regular check is performed to by voice, picture display or the like. 
         [0140]    Accordingly, the operator can recognize that mechanical failure may exist in the plunger  34 , the rack  45  or the like. 
         [0141]    When the operation inspection of the rack  45  is performed at the step S 3  and the step S 10 , the control unit  70  may perform abnormality judgement with below method. 
         [0142]    As shown in  FIG. 12 , when the operation inspection of the rack  45  is performed, the control unit  70  obtains information about a detection value P Xa  of the position of the rack  45  from the position detection device  50  and obtains information about a detection value A X  of the output value of the actuator  48  from the output value detection device  51 . Then, the control unit  70  calculates a target position P Xb  of the rack  45  corresponding to the detection value A X  of the output value of the actuator  48  based on the map α. Then, the control unit  70  calculates a difference D of the detection value P Xa  of the position of the rack  45  and the target position P Xb  of the rack  45  (=P Xb −Pxa). 
         [0143]    Then, when the difference D is not less than a predetermined value Dα, the control unit  70  judges that the operation of the rack  45  is abnormal, that is, the rack  45  cannot finish the predetermined operation X for the predetermined period Ta. That is because the operation of the rack  45  becomes slow following increase of the difference D and possibility that the rack  45  cannot finish the predetermined operation X for the predetermined period Ta is raised. The predetermined value Dα is found by an experiment or the like. The predetermined value Dα is stored previously in the control unit  70 . 
         [0144]    According to the above configuration, the control unit  70  can judge that the operation of the rack  45  is abnormal at an early stage. Excessive load applied on the actuator  48  can be suppressed. 
         [0145]    The control unit  70  may not perform the operation inspection of the rack  45  at the step S 3  when a temperature of cooling water of the diesel engine  1  is not more than 0° C. while the key switch  80  is operated from the OFF position to the ON position. That is because when the temperature of cooling water of the diesel engine  1  is not more than 0° C., viscosity of pressure oil and lubricating oil is raised so that the operation of the rack  45  becomes slow though the plunger  34  can be moved smoothly, whereby accuracy of the operation inspection of the rack  45  may fall. 
         [0146]    However, in the case in which the operation inspection of the rack  45  was performed by the control unit  70  and the operation of the rack  45  is judged to be abnormal in the past (for example, at the time of last starting), the control unit  70  performs the operation inspection of the rack  45  even if the temperature of cooling water of the diesel engine  1  is not more than 0° C. Accordingly, in such a case, the control unit  70  can obtain more data of operation state of the diesel engine  1  for maintenance of the diesel engine  1 . 
       Second Embodiment 
       [0147]    A diesel engine  2  which is a second embodiment of the diesel engine of the present invention is explained. 
         [0148]    In below explanation, differences from the diesel engine  1  are focused, and the same configurations as the diesel engine  1  are designated by the same reference numerals and detailed explanations thereof are omitted. 
         [0149]    As shown in  FIG. 13 , the diesel engine  2  has the engine body  10 , the fuel injection pump  30  (see  FIG. 2 ), a fuel supply part  55 , the starter  60 , a shutoff valve  65  and the control unit  70 . 
         [0150]    As shown in  FIGS. 2 and 13 , fuel sent pressingly from the fuel supply part  55  is supplied to the main port  39  provided in the plunger barrel  33 . 
         [0151]    The fuel supply part  55  supplies fuel to the fuel injection pump  30 . 
         [0152]    As shown in  FIG. 14 , the fuel supply part  55  has a pump (feed pump)  55   a,  a fuel tank  55   b  and a fuel supply pipe  55   c.  The pump  55   a  is connected to the camshaft  38  and driven following rotation of the camshaft  38  (that is, stroke operation of the plunger  34 ). The pump  55   a  is connected via the fuel supply pipe  55   c  to the fuel tank  55   b.  The pump  55   a  is connected via a pipe connector  52  and a fuel supply passage  53  provided in an upper part of the fuel injection pump  30  to a fuel gallery  54 . The fuel gallery  54  is connected to the main port  39 . 
         [0153]    By driving the pump  55   a,  fuel in the fuel tank  55   b  is sent pressingly via the fuel supply pipe  55   c,  the pipe connector  52 , the fuel supply passage  53  and the fuel gallery  54  and supplied to the main port  39 . 
         [0154]    As shown in  FIGS. 2 and 14 , when the plunger  34  moves to the lowest position in the vertical movable range (bottom dead center), the fuel pressure chamber  40  formed above the plunger  34  in the plunger barrel  33  is communicated with the main port  39 , and the fuel is introduced into the fuel pressure chamber  40 . 
         [0155]    On the other hand, when the plunger  34  is pushed up by the cam  37  and raised, the communication port of the main port  39  to the fuel pressure chamber  40  is closed by an outer wall of the plunger  34 . 
         [0156]    As a result, fuel in the fuel pressure chamber  40  is sent pressingly via the distribution port  41  to the distribution shaft  42  following rising of the plunger  34 . Then, the fuel sent pressingly to the distribution shaft  42  is distributed to the delivery valve  43  by the distribution shaft  42 , passes through the injection pipe  44 , and is injected from the fuel injection nozzle  22  of the engine body  10  and supplied into the combustion chamber  17 . 
         [0157]    When the plunger  34  is raised further, the plunger lead  34   a  formed in the plunger  34  is communicated with the main port  39 , and the inside of the plunger barrel  33  is communicated with the main port  39 . 
         [0158]    As a result, fuel in the plunger barrel  33  flows reversely to the side of the fuel supply part  55  of the main port  39 . Namely, fuel injection by the fuel injection pump  30  is stopped. 
         [0159]    As shown in  FIG. 13 , the shutoff valve  65  switches passages of fuel. The shutoff valve  65  is configured by an electromagnetic valve, and can be switched to a position L 1  or a position M 1  by sliding a spool. The shutoff valve  65  is provided in the fuel supply pipe  55   c.    
         [0160]    When the spool is at the position L 1  (closed state), the shutoff valve  65  closes the fuel supply pipe  55   c  so that fuel is not supplied from the fuel supply part  55  to the fuel injection pump  30 . As a result, fuel cannot be injected from the fuel injection pump  30 , whereby fuel cannot be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0161]    When the spool is at the position M 1  (opened state), the shutoff valve  65  opens the fuel supply pipe  55   c  so that fuel is supplied from the fuel supply part  55  to the fuel injection pump  30 . As a result, fuel can be injected from the fuel injection pump  30 , whereby fuel can be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0162]    In this embodiment, the shutoff valve  65  is configured by the electromagnetic valve. However, the present invention is not limited thereto, and another member which can open and close the fuel supply pipe  55   c  may alternatively be used. 
         [0163]    The control unit  70  controls the actuator  48  and the starter  60 . 
         [0164]    The control unit  70  is connected to the shutoff valve  65  and can control operation of the shutoff valve  65 . 
         [0165]    Steps in the case in which the control unit  70  control the operations of the actuator  48 , the starter  60  and the shutoff valve  65  following the operation of the key switch  80  are explained referring to  FIGS. 15 to 22 . 
         [0166]    At a step S 21 , the key switch  80  is operated from the OFF position to the ON position. Accordingly, the actuator  48 , the starter  60  and the control unit  70  are energized. 
         [0167]    At a step S 22 , as shown in  FIGS. 16 to 22 , when the key switch  80  is operated from the OFF position to the ON position, the control unit  70  checks starting of the diesel engine  2  by the starter  60  (provisional check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0168]    At a step S 23 , as shown in  FIGS. 16 to 22 , the control unit  70  performs operation inspection of the rack  45 . 
         [0169]    The operation inspection of the rack  45  is that the predetermined operation X is performed by the rack  45  and whether the rack  45  finishes the predetermined operation X for the predetermined period Ta or not is judged. 
         [0170]    The predetermined operation X is movement of the rack  45  throughout the movable range P 1  to P 2 . In this embodiment, the control unit  70  moves the rack  45  to the end position P 1 , the end position P 2  and the end position P 1  in this order. 
         [0171]    The predetermined period Ta is a period of time required normally for finishing the predetermined operation X of the rack  45  when the rack  45  is operated normally following driving of the actuator  48 . Information about the predetermined period Ta is stored previously in the control unit  70 . 
         [0172]    As shown in  FIG. 16 , when the rack  45  finishes the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is normal. 
         [0173]    As shown in  FIGS. 17 to 22 , when the rack  45  does not finish the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is abnormal. 
         [0174]    When the operation of the rack  45  is judged to be normal (strep S 23 , normal), the control unit  70  shifts to a strep S 24 . 
         [0175]    When the operation of the rack  45  is judged to abnormal normal (strep S 23 , abnormal), the control unit  70  shifts to a strep S 29 . 
         [0176]    At the step S 24 , the control unit  70  releases the provisional check. 
         [0177]    At a step S 25 , the control unit  70  judges whether the key switch  80  is operated to the START position or not. 
         [0178]    When the key switch  80  is not operated to the START position and is at the ON position, the control unit  70  stands by until the key switch  80  is operated to the START position. 
         [0179]    When the key switch  80  is operated to the START position, the control shifts to a step S 26 . 
         [0180]    At the step S 26 , the control unit  70  switches the shutoff valve  65  to the opened state. 
         [0181]    Accordingly, fuel can be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0182]    At a step S 27 , as shown in  FIG. 16 , the control unit  70  energizes the starter  60  for a predetermined energizing period Td so as to make the plunger  34  perform the stroke operation. In this case, since the shutoff valve  65  is switched to the opened state at the step S 26 , fuel is supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0183]    The predetermined energizing period Td is a period of time of operation of the starter  60  required normally for starting the diesel engine  2 . Information about the predetermined energizing period Td is stored previously in the control unit  70 . 
         [0184]    At a step S 28 , as shown in  FIG. 16 , the control unit  70  operates the starter  60  for the predetermined energizing period Td while the shutoff valve  65  is switched to the opened state so as to start the diesel engine  2 . 
         [0185]    At the step S 29 , the control unit  70  judges whether the key switch  80  is operated to the START position or not. 
         [0186]    When the key switch  80  is not operated to the START position and is at the ON position, the control unit  70  stands by until the key switch  80  is operated to the START position. 
         [0187]    When the key switch  80  is operated to the START position, the control shifts to a step S 30 . 
         [0188]    At the step S 30 , as shown in  FIGS. 17 to 22 , the control unit  70  switches the shutoff valve  65  to the closed state. Accordingly, fuel can be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0189]    At a step S 31 , as shown in  FIGS. 17 to 22 , the control unit  70  energizes the starter  60  for a predetermined energizing period Te so as to make the plunger  34  perform the stroke operation. In this case, since the shutoff valve  65  is switched to the closed state at the step S 30 , fuel is not supplied from the fuel injection pump  30  into the combustion chamber  17 . Accordingly, the control unit  70  makes the plunger  34  perform the stroke operation by the starter  60  while the diesel engine  2  cannot be started by the starter  60 . 
         [0190]    A length of the predetermined energizing period Te is not limited especially if it is enough for the stroke operation of the plunger  34  and can be determined freely by an operator. For example, the predetermined energizing period Te may have the same length as the predetermined energizing period Td. Information about the predetermined energizing period Te is stored previously in the control unit  70 . 
         [0191]    While making the plunger  34  perform the stroke operation, the control unit  70  releases temporarily the provisional check. 
         [0192]    As shown in  FIG. 20 , when the key switch  80  is at the ON position after the operation inspection of the rack  45 , the control unit  70  stands by until the key switch  80  is operated from the ON position to the START position and makes the plunger  34  perform the stroke operation (rotation of the crankshaft  16 ) after the key switch  80  is operated to the START position. 
         [0193]    As shown in  FIG. 19 , when the key switch  80  is operated from the START position to the ON position before the predetermined energizing period Te passes, the control unit  70  stops the starter  60  and interrupts the stroke operation of the plunger  34  (rotation of the crankshaft  16 ). In this case, though the starter  60  is operated for a period Te′ (Te′&lt;Te), the control unit  70  regards that the preliminary stroke operation of the plunger  34  is finished, and shifts to a step S 32 . 
         [0194]    At the step S 32 , as shown in  FIGS. 17 to 22 , the control unit  70  stands by for the predetermined standby period Tc. The predetermined standby period Tc is a period of time required for stopping completely the plunger  34  moving from habit after performing the preliminary stroke operation at the step S 31 . Information about the predetermined standby period Tc is stored previously in the control unit  70 . By standing by for the predetermined standby period Tc, accuracy of the operation inspection of the rack  45  at a step S 33  can be improved. 
         [0195]    At the step S 33 , as shown in  FIGS. 17 to 22 , after the predetermined standby period Tc passes, the control unit  70  performs the operation inspection of the rack  45  again. 
         [0196]    On condition that the key switch  80  is held at the ON position or the START position, the control unit  70  can perform the operation inspection of the rack  45 . Accordingly, as shown in  FIG. 22 , at the time of the operation inspection of the rack  45 , when the key switch  80  is operated to the OFF position, the operation inspection of the rack  45  is interrupted. 
         [0197]    As shown in  FIG. 17 , when the operation of the rack  45  is judged to be normal (step S 33 , normal), the control unit  70  shifts to the step S 24 . 
         [0198]    When the operation of the rack  45  is judged to be abnormal (step S 33 , abnormal), the control unit  70  shifts to a step S 34 . 
         [0199]    At the step S 34 , as shown in  FIGS. 18 to 21 , the control unit  70  performs error judgement and checks starting of the diesel engine  2  by the starter  60  (regular check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0200]    At a step S 35 , after the control unit  70  performs the regular check, when the key switch  80  is operated to the OFF position (step S 35 , Yes), the control shifts to a step S 36 . 
         [0201]    At the step S 35 , after the control unit  70  performs the regular check, when the key switch  80  is held at the ON position or the START position (step S 35 , No), the error judgement and the regular check are held. 
         [0202]    At the step S 35 , as shown in  FIG. 21 , when the key switch  80  is operated to the OFF position, the regular check and the error judgement are released. Accordingly, after that, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 21 . 
         [0203]    As shown in  FIG. 22 , when the key switch  80  is operated to the OFF position while the processes shown in the steps S 21  to S 34  are performed, the processes are interrupted. Subsequently, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 21 . 
         [0204]      FIGS. 16 to 22  are time charts of the operation of the diesel engine  2  corresponding to the operation of the key switch  80 . 
         [0205]    As shown in  FIG. 16 , the control unit  70  judges that the first rack operation inspection is normal, and starts the diesel engine  2 . 
         [0206]      FIG. 16  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 24 , the step S 25 , the step S 26 , the step S 27  and the step S 28  in this order in the flow chart (see  FIG. 15 ). 
         [0207]    As shown in  FIG. 17 , the control unit  70  judges that the first rack operation inspection is abnormal and the second rack operation inspection is normal, and starts the diesel engine  2 . 
         [0208]      FIG. 17  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33 , the step S 24 , the step S 25 , the step S 26 , the step S 27  and the step S 28  in this order in the flow chart (see  FIG. 15 ). 
         [0209]    As shown in  FIG. 18 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0210]      FIG. 18  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33  and the step S 34  in this order in the flow chart (see  FIG. 15 ). 
         [0211]    As shown in  FIG. 19 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0212]      FIG. 19  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33  and the step S 34  in this order in the flow chart (see  FIG. 15 ). 
         [0213]    As shown in  FIG. 20 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0214]      FIG. 20  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33  and the step S 34  in this order in the flow chart (see  FIG. 15 ). 
         [0215]    As shown in  FIG. 21 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. Then, since the key switch  80  is operated to the OFF position, the control unit  70  releases the regular check. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 21 . 
         [0216]      FIG. 21  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33 , the step S 34 , the step S 35 , the step S 36 , the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30  and the step S 31  in this order in the flow chart (see  FIG. 15 ). 
         [0217]    As shown in  FIG. 22 , the control unit  70  judges that the first rack operation inspection is abnormal. Then, since the key switch  80  is operated to the OFF position in the midst of the second rack operation inspection, the control unit  70  interrupts the second rack operation inspection. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 21 . 
         [0218]      FIG. 22  shows a time chart of the operation of the diesel engine  2  when the steps shifts to the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32 , the step S 33 , the step S 21 , the step S 22 , the step S 23 , the step S 29 , the step S 30 , the step S 31 , the step S 32  and the step S 33  in this order in the flow chart (see  FIG. 15 ). 
         [0219]    According to the above configuration, even if the operation inspection of the rack  45  is judged to be abnormal at the step S 23 , the shutoff valve  65  is switched to the closed state at the step S 30  so that fuel cannot be supplied from the fuel injection pump  30  into the combustion chamber  17 , whereby the fuel is not supplied into the combustion chamber  17  even if the starter  60  is operated as shown in the step S 31 . Accordingly, the starter  60  can be operated without starting the diesel engine  2 . 
         [0220]    Even if the plunger  34  is adhered by a film of fuel or the like formed on the outer perimeter of the plunger  34  and the plunger  34  is hardly to be rotated and as a result the operation of the rack  45  is judged to be abnormal by the control unit  70  at the step S 23 , the control unit  70  makes the plunger  34  perform the stroke operation by the starter  60  while the shutoff valve  65  is switched to the closed state so as to remove the film of fuel or the like as shown in the steps S 30  and S 31 . Accordingly, the diesel engine  2  can be started smoothly. 
         [0221]    As shown in  FIGS. 18 to 21 , in this embodiment, the control unit  70  can perform the operation inspection of the rack  45  up to twice before performing the regular check (error judgement). However, the present invention is not limited thereto, and the control unit  70  may perform the operation inspection of the rack  45  two or more times before performing the regular check. 
         [0222]    Namely, when the rack  45  cannot finish the predetermined operation X for the predetermined period Ta until the control unit  70  repeats by turns the operation inspection of the rack  45  (the process in which the rack  45  is made perform the predetermined operation X by the actuator  48 ) and the process in which the plunger  34  is made perform the preliminary stroke operation by the starter  60  (see the steps S 30  and S 31 ) for a predetermined number of times N, the control unit  70  checks the starting of the diesel engine  2  by the starter  60  (regular check). The predetermined number of times N can be set freely by an operator or the like. 
         [0223]    For example, in the case in which the control unit  70  can perform the operation inspection of the rack  45  for three times before the regular check, when the regular check is performed, the control unit  70  performs the operation inspection of the rack  45  (first time), the abnormality judgement, the stroke process, the operation inspection of the rack  45  (second time), the abnormality judgement, the stroke process, the operation inspection of the rack  45  (third time), the abnormality judgement, and the regular check in this order. 
         [0224]    As shown in  FIGS. 16 to 22 , the shutoff valve  65  is normally in the opened state and switched to the closed state when the predetermined conditions are satisfied as shown in the step S 30 . However, the present invention is not limited thereto, and the shutoff valve  65  may alternatively be configured to be normally in the closed state and switched to the opened state when the predetermined conditions are satisfied as shown in the step S 26 . 
         [0225]    Instead of the shutoff valve  65 , a shutoff valve  66   a  and a return pipe  66   b  may alternatively be used. 
         [0226]    As shown in  FIG. 23 , the shutoff valve  66   a  switches passages of fuel. The shutoff valve  66   a  is configured by an electromagnetic valve, and can be switched to a position L 2  or a position M 2  by sliding a spool. The shutoff valve  66   a  is provided in the middle of the injection pipe  44 . 
         [0227]    One of ends of the return pipe  66   b  is connected to the shutoff valve  66   a,  and the other end is connected to the fuel supply part  55  (the fuel supply pipe  55   c ). The other end of the return pipe  66   b  may alternatively be connected to the fuel tank  55   b  or a suction side of the pump  55   a.    
         [0228]    When the spool is at the position L 2  (closed state), the shutoff valve  66   a  shuts off the communication of the fuel injection pump  30  and the combustion chamber  17  and communicates the injection pipe  44  with the return pipe  66   b.  As a result, fuel injected from the fuel injection pump  30  is returned via the return pipe  66   b  to the fuel supply part  55  (the fuel supply pipe  55   c ), whereby fuel cannot be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0229]    When the spool is at the position M 2  (opened state), the shutoff valve  66   a  communicates the fuel injection pump  30  with the combustion chamber  17  by the injection pipe  44  and shuts off the communication of the injection pipe  44  and the return pipe  66   b.  As a result, fuel injected from the fuel injection pump  30  is supplied via the injection pipe  44  into the combustion chamber  17  without flowing into the return pipe  66   b,  whereby fuel can be supplied from the fuel injection pump  30  into the combustion chamber  17 . 
         [0230]    In this embodiment, the shutoff valve  66   a  is configured by the electromagnetic valve. However, the present invention is not limited thereto, and another member which can switch the passages of fuel may alternatively be used. 
       Third Embodiment 
       [0231]    A diesel engine  3  which is a third embodiment of the diesel engine of the present invention is explained. 
         [0232]    In below explanation, differences from the diesel engine  1  are focused, and the same configurations as the diesel engine  1  are designated by the same reference numerals and detailed explanations thereof are omitted. 
         [0233]    As shown in  FIG. 24 , the diesel engine  3  has the engine body  10 , the fuel injection pump  30 , a sub actuator  57 , the starter  60  and the control unit  70 . 
         [0234]    The fuel injection pump  30  supplies fuel to the fuel injection nozzle  22 . 
         [0235]    As shown in  FIG. 25 , the fuel injection pump  30  has the hydraulic head  31 . The plunger barrel  33  is inserted into the hydraulic head  31 , and the plunger  34  is arranged slidably vertically in the plunger barrel  33 . In the outer peripheral surface of the plunger  34 , the plunger lead  34   a  is formed. The plunger lead  34   a  is a spiral groove. Below the plunger  34 , the roller-like tappet  36  is pivoted rotatably. The cam  37  contacts the tappet  36 . The cam  37  is fixed to a camshaft  38 . The camshaft  38  is connected via a gear (not shown) to the crankshaft  16  of the engine body  10 . The camshaft  38  (the cam  37 ) is rotated following rotation of the crankshaft  16 , and as a result, the plunger  34  is stroked vertically. 
         [0236]    When the plunger  34  moves to the lowest position in the vertical movable range (bottom dead center), the fuel pressure chamber  40  formed above the plunger  34  in the plunger barrel  33  is communicated with a main port (not shown), and the fuel is introduced into the fuel pressure chamber  40 . 
         [0237]    On the other hand, when the plunger  34  is pushed up by the cam  37  and raised, a communication port of the main port to the fuel pressure chamber  40  is closed by the outer wall of the plunger  34 . 
         [0238]    As a result, fuel in the fuel pressure chamber  40  is pressurized following rising of the plunger  34 , and opens a valve  71  above the plunger  34  and is injected from an injection port  72 . The fuel injected from the injection port  72  passes through the injection pipe  44  and is injected from the fuel injection nozzle  22  of the engine body  10  so as to be supplied into the combustion chamber  17 . 
         [0239]    When the plunger  34  is raised further, the plunger lead  34   a  formed in the plunger  34  is communicated with the main port, and the inside of the plunger barrel  33  is communicated with the main port. 
         [0240]    As a result, fuel in the plunger barrel  33  flows reversely to the main port. Namely, fuel injection by the fuel injection pump  30  is stopped. 
         [0241]    As shown in  FIG. 25 , a gear (not shown) is formed in the outer peripheral surface of the plunger  34  and is meshed with the rack  45 . The rack  45  is supported movably reciprocally along the lateral direction of  FIG. 25 . In this embodiment, the rack  45  is supported movably reciprocally between the end positions P 1  and P 2 . At a tip of the rack  45 , a connection link  73  is connected rotatably by a pin  73   a.  At a tip of the connection link  73 , a reversed U-like engagement member  74  is connected by a pin  75 . A sensing rod  76  is attached to the reversed U-like engagement member  74 . The sensing rod  76  is slid together with the rack  45 . At a tip of the sensing rod  76 , a position detection device  77  detecting a position of the rack  45  is connected. The position detection device  77  detects a sliding amount of the sensing rod  76  so as to detect the position of the rack  45 . 
         [0242]    An interlocking lever  78  is supported rotatably at its vertical middle part by a fulcrum pin  79 . A return spring  81  is attached to an upper end of the interlocking lever  78 , and the interlocking lever  78  is biased to be rotated clockwise in  FIG. 25  by the return spring  81 . 
         [0243]    The pin  75  is attached to a middle part of the interlocking lever  78  so that the interlocking lever  78  and the rack  45  are connected via the connection link  73  so as to be interlocked with each other. 
         [0244]    By moving the sliding shaft  48   a  reciprocally, the actuator (electromagnetic solenoid)  48  moves the rack  45  reciprocally via a link mechanism (the interlocking lever  78 , the connection link  73  and the like). A contact plate  82  is attached to a tip of the sliding shaft  48   a  of the actuator  48 , and a connection pin  56  contacts the contact plate  82 . The connection pin  56  is fixed to a lower end of the interlocking lever  78 . 
         [0245]    When the sliding shaft  48   a  of the actuator  48  is projected rightward in  FIG. 25 , the interlocking lever  78  is rotated counterclockwise via the contact plate  82  and the connection pin  56  oppositely to biasing power of the return spring  81 . Following it, the rack  45  is slid leftward in  FIG. 25  (toward the end position P 2 ) via the connection link  73 . On the other hand, when the sliding shaft  48   a  is contracted, the interlocking lever  78  is rotated clockwise by elastic power of the return spring  81  so that the rack  45  is slid rightward in  FIG. 25  (toward the end position P 1 ). When the actuator  48  is not energized, the rack  45  exists at the end position P 1  in the movable range P 1  to P 2 . 
         [0246]    Following reciprocal movement of the rack  45  by the actuator  48 , the plunger  34  is rotated around its axis. 
         [0247]    By changing the rotation position of the plunger  34  by the actuator  48 , timing of communication of the plunger lead  34   a  with the main port  39  at the time of rising of the plunger  34  is changed. As a result, fuel injection amount of the fuel injection pump  30  is changed. 
         [0248]    In this embodiment, the fuel injection amount is increased by sliding the rack  45  toward the end position P 2 , and the fuel injection amount is reduced by sliding the rack  45  toward the end position P 1 . 
         [0249]    The sub actuator  57  generates power for moving the rack  45 . 
         [0250]    For example, the sub actuator  57  is configured by a pneumatic cylinder, a hydraulic cylinder or an electromagnetic solenoid. The maximum output of the sub actuator  57  is larger than the maximum output of the actuator  48 . Accordingly, at the time of moving the rack  45 , the sub actuator  57  can apply larger pushing power to the rack  45  than the actuator  48 . The sub actuator  57  is connected to the link mechanism interposed between the actuator  48  and the rack  45  (for example, the interlocking lever  78 , the connection link  73  and the like), and applies the pushing power via the link mechanism to the rack  45  (see  FIG. 32 ). 
         [0251]    The sub actuator  57  may alternatively be connected to the rack  45  so that the sub actuator  57  applies the pushing power directly to the rack  45  (see  FIG. 33 ). The sub actuator  57  may alternatively be connected to the actuator  48  so that the sub actuator  57  applies the pushing power to the rack  45  by pushing the actuator  48  (see  FIG. 34 ). 
         [0252]    An attachment structure of the sub actuator  57  is explained later. 
         [0253]    The starter  60  starts the diesel engine  3 . 
         [0254]    As shown in  FIG. 24 , the starter  60  has an electric engine. The starter  60  is connected to the crankshaft  16  of the engine body  10  and can rotate the crankshaft  16 . Following rotation of the crankshaft  16 , the starter  60  can stroke vertically the plunger  34 . 
         [0255]    By rotating the crankshaft  16 , the starter  60  starts the diesel engine  3 . Start of the diesel engine  3  means the state that the intake stroke, the compression stroke, the expansion stroke and the exhaust stroke are realized sequentially while the starter  60  is stopped. 
         [0256]    The control unit  70  controls the actuator  48  and the starter  60 . 
         [0257]    As shown in  FIG. 24 , the key switch  80  is connected to the control unit  70 . 
         [0258]    The key switch  80  is an operation instrument for starting and stopping the diesel engine  3 . The key switch  80  can be shifted to the OFF position, the ON position or the START position. When the key switch  80  is operated to the OFF position, the starter  60  and the control unit  70  are not energized and stopped. When the key switch  80  is operated to the ON position, the actuator  48 , the starter  60  and the control unit  70  are energized and can be operated. When the key switch  80  is operated from the ON position to the START position, the control unit  70  operates the starter  60  and executes various control programs for starting the diesel engine  3 . 
         [0259]    The control unit  70  is connected to the actuator  48  and can change the rotation position of the plunger  34  by operating the actuator  48  so as to change the position of the rack  45 . By changing the rotation position of the plunger  34 , the control unit  70  adjusts the fuel injection amount of the fuel injection pump  30 . 
         [0260]    The control unit  70  is connected to the sub actuator  57  and can control operation of the sub actuator  57 . 
         [0261]    The control unit  70  is connected to the starter  60  and can rotate the crankshaft  16  by operating the starter  60  so as to stroke the plunger  34 . By operating the starter  60  so as to rotate the crankshaft  16 , the control unit  70  can start the diesel engine  3 . 
         [0262]    The control unit  70  is connected to the position detection device  77  and can obtain information about a detection value of the position of the rack  45  from the position detection device  77 . 
         [0263]    Steps in the case in which the control unit  70  control the operations of the actuator  48 , the sub actuator  57  and the starter  60  following the operation of the key switch  80  are explained referring to  FIGS. 26 to 31 . 
         [0264]    At a step S 41 , the key switch  80  is operated from the OFF position to the ON position. Accordingly, the actuator  48 , the sub actuator  57 , the starter  60  and the control unit  70  are energized. 
         [0265]    At a step S 42 , as shown in  FIGS. 27 to 31 , when the key switch  80  is operated from the OFF position to the ON position, the control unit  70  checks starting of the diesel engine  3  by the starter  60  (provisional check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0266]    At a step S 43 , as shown in  FIGS. 27 to 31 , the control unit  70  performs operation inspection of the rack  45 . 
         [0267]    The operation inspection of the rack  45  is that the predetermined operation X is performed by the rack  45  and whether the rack  45  finishes the predetermined operation X for the predetermined period Ta or not is judged. 
         [0268]    The predetermined operation X is movement of the rack  45  throughout the movable range P 1  to P 2 . In this embodiment, the control unit  70  moves the rack  45  to the end position P 1 , the end position P 2  and the end position P 1  in this order. 
         [0269]    The predetermined period Ta is a period of time required normally for finishing the predetermined operation X of the rack  45  when the rack  45  is operated normally following driving of the actuator  48 . Information about the predetermined period Ta is stored previously in the control unit  70 . 
         [0270]    As shown in  FIG. 27 , when the rack  45  finishes the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is normal. 
         [0271]    As shown in  FIGS. 28 to 31 , when the rack  45  does not finish the predetermined operation X for the predetermined period Ta, the control unit  70  judges that the operation of the rack  45  is abnormal. 
         [0272]    When the operation of the rack  45  is judged to be normal (strep S 43 , normal), the control unit  70  shifts to a strep S 44 . 
         [0273]    When the operation of the rack  45  is judged to abnormal normal (strep S 43 , abnormal), the control unit  70  shifts to a strep S 47 . 
         [0274]    At the step S 44 , the control unit  70  releases the provisional check. 
         [0275]    At a step S 45 , the control unit  70  judges whether the key switch  80  is operated to the START position or not. 
         [0276]    When the key switch  80  is not operated to the START position and is at the ON position, the control unit  70  stands by until the key switch  80  is operated to the START position. 
         [0277]    When the key switch  80  is operated to the START position, the control shifts to a step S 46 . 
         [0278]    At the step S 46 , as shown in  FIG. 27 , the control unit  70  operates the starter  60  so as to start the diesel engine  3 . 
         [0279]    At the step S 47 , as shown in  FIGS. 28 to 31 , the control unit  70  moves the rack  45  by the sub actuator  57 . At this time, the control unit  70  moves the rack  45  throughout the movable range P 1  to P 2 . In this embodiment, the control unit  70  moves the rack  45  to the end position P 1 , the end position P 2  and the end position P 1  in this order. Strictly, the rack  45  is moved from to the end position P 1  to the end position P 2  by pushing power of the sub actuator  57 , and the rack  45  is moved from to the end position P 2  to the end position P 1  by elastic power of the return spring  81 . 
         [0280]    At the step S 47 , the control unit  70  may alternatively move the rack  45  by both the actuator  48  and the sub actuator  57 . 
         [0281]    At a step S 48 , as shown in  FIGS. 28 to 31 , after moving the rack  45  by the sub actuator  57 , the control unit  70  performs the operation inspection of the rack  45  again. 
         [0282]    On condition that the key switch  80  is held at the ON position or the START position, the control unit  70  can perform the operation inspection of the rack  45 . Accordingly, as shown in  FIG. 31 , at the time of the operation inspection of the rack  45 , when the key switch  80  is operated to the OFF position, the operation inspection of the rack  45  is interrupted. 
         [0283]    As shown in  FIG. 28 , when the operation of the rack  45  is judged to be normal (step S 48 , normal), the control unit  70  shifts to the step S 44 . 
         [0284]    When the operation of the rack  45  is judged to be abnormal (step S 48 , abnormal), the control unit  70  shifts to a step S 49 . 
         [0285]    At the step S 49 , as shown in  FIGS. 29 and 30 , the control unit  70  performs error judgement and checks starting of the diesel engine  3  by the starter  60  (regular check). Namely, the control unit  70  makes the starter  60  not be operated even if the key switch  80  is operated to the START position. 
         [0286]    At a step S 50 , after the control unit  70  performs the regular check, when the key switch  80  is operated to the OFF position (step S 50 , Yes), the control shifts to a step S 51 . 
         [0287]    At the step S 50 , after the control unit  70  performs the regular check, when the key switch  80  is held at the ON position or the START position (step S 50 , No), the error judgement and the regular check are held. 
         [0288]    At the step S 51 , as shown in  FIG. 30 , when the key switch  80  is operated to the OFF position, the regular check and the error judgement are released. Accordingly, after that, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 41 . 
         [0289]    As shown in  FIG. 31 , when the key switch  80  is operated to the OFF position while the processes shown in the steps S 41  to S 49  are performed, the processes are interrupted. Subsequently, when the key switch  80  is operated from the OFF position to the ON position, the control starts from the step S 41 . 
         [0290]      FIGS. 27 to 31  are time charts of the operation of the diesel engine  3  corresponding to the operation of the key switch  80 . 
         [0291]    As shown in  FIG. 27 , the control unit  70  judges that the first rack operation inspection is normal, and starts the diesel engine  3 . 
         [0292]      FIG. 27  shows a time chart of the operation of the diesel engine  3  when the steps shifts to the step S 41 , the step S 42 , the step S 43 , the step S 44 , the step S 45  and the step S 46  in this order in the flow chart (see  FIG. 26 ). 
         [0293]    As shown in  FIG. 28 , the control unit  70  judges that the first rack operation inspection is abnormal and the second rack operation inspection is normal, and starts the diesel engine  3 . 
         [0294]      FIG. 28  shows a time chart of the operation of the diesel engine  3  when the steps shifts to the step S 41 , the step S 42 , the step S 43 , the step S 47 , the step S 48 , the step S 44 , the step S 45  and the step S 46  in this order in the flow chart (see  FIG. 26 ). 
         [0295]    As shown in  FIG. 29 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. 
         [0296]      FIG. 29  shows a time chart of the operation of the diesel engine  3  when the steps shifts to the step S 41 , the step S 42 , the step S 43 , the step S 47 , the step S 48  and the step S 49  in this order in the flow chart (see  FIG. 26 ). 
         [0297]    As shown in  FIG. 30 , the control unit  70  performs the rack operation inspection twice and judges that each inspection is abnormal, and performs the regular check. Then, since the key switch  80  is operated to the OFF position, the control unit  70  releases the regular check. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 41 . 
         [0298]      FIG. 30  shows a time chart of the operation of the diesel engine  3  when the steps shifts to the step S 41 , the step S 42 , the step S 43 , the step S 47 , the step S 48 , the step S 49 , the step S 50 , the step S 51 , the step S 41 , the step S 42 , the step S 43  and the step S 47  in this order in the flow chart (see  FIG. 26 ). 
         [0299]    As shown in  FIG. 31 , the control unit  70  judges that the first rack operation inspection is abnormal. Then, since the key switch  80  is operated to the OFF position in the midst of the second rack operation inspection, the control unit  70  interrupts the second rack operation inspection. Subsequently, since the key switch  80  is operated to the ON position, the control unit  70  redoes from the step S 41 . 
         [0300]      FIG. 31  shows a time chart of the operation of the diesel engine  3  when the steps shifts to the step S 41 , the step S 42 , the step S 43 , the step S 47 , the step S 48 , the step S 41 , the step S 42 , the step S 43 , the step S 47  and the step S 48  in this order in the flow chart (see  FIG. 26 ). 
         [0301]    According to the above configuration, even if the plunger  34  is adhered by a film of fuel or the like formed on an outer perimeter of the plunger  34  and the plunger  34  is hardly to be rotated and as a result the operation of the rack  45  is judged to be abnormal by the control unit  70  at the step S 43 , the control unit  70  applies larger pushing power to the rack  45  by using the sub actuator  57  than using the actuator  48 , whereby the rack  45  is moved and the plunger  34  is rotated so as to remove the film of fuel or the like as shown in the step S 47 . Accordingly, the diesel engine  3  can be started smoothly. 
         [0302]    As shown in  FIGS. 29 and 30 , in this embodiment, the control unit  70  can perform the operation inspection of the rack  45  up to twice before performing the regular check (error judgement). However, the present invention is not limited thereto, and the control unit  70  may perform the operation inspection of the rack  45  two or more times before performing the regular check. 
         [0303]    Namely, when the rack  45  cannot finish the predetermined operation X for the predetermined period Ta until the control unit  70  repeats by turns the operation inspection of the rack  45  (the process in which the rack  45  is made perform the predetermined operation X by the actuator  48 ) and the process in which the rack  45  is moved by the sub actuator  57  (see the step S 47 ) for a predetermined number of times N, the control unit  70  checks the starting of the diesel engine  1  by the starter  60  (regular check). The predetermined number of times N can be set freely by an operator or the like. 
         [0304]    For example, in the case in which the control unit  70  can perform the operation inspection of the rack  45  for three times before the regular check, when the regular check is performed, the control unit  70  performs the operation inspection of the rack  45  (first time), the abnormality judgement, the rack operation process, the operation inspection of the rack  45  (second time), the abnormality judgement, the rack operation process, the operation inspection of the rack  45  (third time), the abnormality judgement, and the regular check in this order. 
         [0305]    A first embodiment of the attachment structure of the sub actuator  57  is explained below. 
         [0306]    As shown in  FIG. 32 , the sub actuator  57  is connected via the link mechanism (the interlocking lever  78 , the connection link  73  and the like) to the rack  45 . The contact plate  82  is attached to a tip of a sliding shaft  57   a  of the sub actuator  57 . A main body  57   b  of the sub actuator  57  is fixed to a casing  30   a  of the fuel injection pump  30 . 
         [0307]    At the step S 47 , the control unit  70  makes the sliding shaft  57   a  of the sub actuator  57  slide rightward in  FIG. 32  so as to rotate the interlocking lever  78  counterclockwise, thereby moving the rack  45  leftward (from the end position P 1  toward the end position P 2 ). 
         [0308]    A second embodiment of the attachment structure of the sub actuator  57  is explained below. 
         [0309]    As shown in  FIG. 33 , the sub actuator  57  is connected to the rack  45 . The main body  57   b  of the sub actuator  57  is fixed to an inner peripheral surface of the casing  30   a  of the fuel injection pump  30 . The tip of the sliding shaft  57   a  of the sub actuator  57  is attached to a flange part  45   b  formed in an outer peripheral surface of the rack  45 . 
         [0310]    At the step S 47 , the control unit  70  makes the sliding shaft  57   a  of the sub actuator  57  slide leftward in  FIG. 33  so as to move the rack  45  leftward (from the end position P 1  toward the end position P 2 ). 
         [0311]    A third embodiment of the attachment structure of the sub actuator  57  is explained below. 
         [0312]    As shown in  FIG. 34 , the sub actuator  57  is connected to the actuator  48 . The main body  57   b  of the sub actuator  57  is fixed to the casing  30   a  of the fuel injection pump  30 . The tip of the sliding shaft  57   a  of the sub actuator  57  is attached to a main body  48   b  of the actuator  48 . The main body  48   b  of the actuator  48  is biased leftward in  FIG. 34  by an elastic member  48   c.  The contact plate  82  is attached to the tip of the sliding shaft  48   a  of the actuator  48 . 
         [0313]    At the step S 47 , the control unit  70  makes the sliding shaft  57   a  of the sub actuator  57  slide rightward in  FIG. 34  so as to contract the elastic member  48   c,  thereby moving the whole actuator  48  rightward. As a result, the control unit  70  rotates the interlocking lever  78  counterclockwise so as to move the rack  45  leftward (from the end position P 1  toward the end position P 2 ). 
       INDUSTRIAL APPLICABILITY 
       [0314]    The present invention can be used for a diesel engine. 
       DESCRIPTION OF NOTATIONS 
       [0315]      1  diesel engine 
         [0316]      30  fuel injection pump 
         [0317]      34  plunger 
         [0318]      45  rack 
         [0319]      48  actuator 
         [0320]      60  starter 
         [0321]      70  control unit 
         [0322]      80  key switch