Patent Publication Number: US-9422907-B2

Title: Start control device for outboard motor, start control method for outboard motor, and program

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     The present application is the U.S. National Phase of International Patent Application Serial No. PCT/JP2013/071901, filed Aug. 14, 2013, which claims priority to Japanese Patent Application Serial No. 2012-272680, filed Dec. 13, 2012. The contents of the foregoing applications are hereby incorporated by reference in their entireties. 
     TECHNICAL FIELD 
     The present invention relates to a start control device for an outboard motor, a start control method for an outboard motor, and a program. In particular, the present invention is suitable for being used in a case where cancellation and execution of security of an outboard motor are conducted by using an electronic key. 
     BACKGROUND ART 
     In order to start or stop an outboard motor, an ignition switch provided to an outboard motor main body or provided in an operation cabin has been conventionally used. Concretely, by inserting a key into the ignition switch, and rotating the ignition switch in stages, the ignition is turned on, and then a start SW is turned on, which starts the outboard motor. 
     In recent years, a demand for improving a security of a boat and an outboard motor has been increasing. However, in the outboard motor which is started by the ignition switch described above, it cannot be always said that the perfect security is provided. Therefore, it can be considered that, with respect to the boat and the outboard motor as well, an engine start system in which a key is not required as disclosed in Patent Literature 1, for example, is employed to improve the security. In Patent Literature 1, only when an encryption code received from a portable machine coincides with a collation code, a steering lock is unlocked so that an operation is allowed, which enables to improve the security. 
     CITATION LIST 
     Patent Literature 
     
         
         Patent Literature 1: Japanese Laid-open Patent Publication No. 2006-137338 
       
    
     SUMMARY OF INVENTION 
     Technical Problem 
     One switch is used in the engine start system in Patent Literature 1, in which an authentication of the portable machine is performed and a steering lock is unlocked by pressing-down the switch for the first time, an authentication of the portable machine is performed again to turn on the system by pressing-down the switch for the second time, and the engine is started by pressing-down the switch for the third time. However, a user does not always want to start the engine, and it is also possible to suppose a case where the user wants to turn off the system, from the state where the system is turned on, without starting the engine. In this case, in a four-wheel vehicle and the like, for example, it can be considered to switch whether to start the engine or to turn off the system in accordance with whether or not a brake pedal is depressed at the time of pressing-down the one switch. For example, it is possible to employ a method such that the engine is started by pressing-down the switch while depressing the brake pedal from the state where the system is turned on, and the system is turned off by pressing-down the switch without depressing the brake pedal from the state where the system is turned on. 
     However, since the brake pedal is not provided to the outboard motor, it is difficult to perform the switching with a method similar to that of the four-wheel vehicle. Further, when a switch or the like is newly added for switching the start of the engine and the turning-off of the system, a product cost is increased. 
     The present invention is made in view of the problems as described above, and an object thereof is to enable, even in an outboard motor system in which cancellation and execution of security of an outboard motor are conducted in accordance with an authentication of a portable machine, a state where electric power is supplied to the outboard motor (ignition-on state) to shift to a state where the supply of electric power to the outboard motor is stopped (ignition-off state) without starting the outboard motor. 
     Solution to Problem 
     A start control device for an outboard motor of the present invention is a start control device for an outboard motor performing a control to start and stop the outboard motor in accordance with an instruction made by a boat operator, the start control device for the outboard motor including: an authentication means performing an authentication of a portable machine carried by the boat operator via a communication part in accordance with an operation of a first switch made by the boat operator; an electric power supply instruction means instructing a supply of electric power to the outboard motor based on a success of the authentication of the portable machine performed by the authentication means; a security cancellation instruction means instructing a cancellation of security of the outboard motor based on the success of the authentication of the portable machine performed by the authentication means; a determination means determining whether or not an emergency switch is on when the first switch is operated by the boat operator in the state where the electric power is supplied to the outboard motor in accordance with the instruction made by the electric power supply instruction means, and the security of the outboard motor is cancelled in accordance with the instruction made by the security cancellation instruction means; a start instruction means instructing the start of the outboard motor when the determination means determines that the emergency switch is not on; and a stop instruction means instructing a stop of the supply of electric power to the outboard motor when the determination means determines that the emergency switch is on. 
     A start control method for an outboard motor of the present invention is a start control method for an outboard motor performing a control to start and stop the outboard motor in accordance with an instruction made by a boat operator, the start control method for the outboard motor including: an authentication step of performing an authentication of a portable machine carried by the boat operator via a communication part in accordance with an operation of a first switch made by the boat operator; an electric power supply instruction step of instructing a supply of electric power to the outboard motor based on a success of the authentication of the portable machine performed by the authentication step; a security cancellation instruction step of instructing a cancellation of security of the outboard motor based on the success of the authentication of the portable machine performed by the authentication step; a determination step of determining whether or not an emergency switch is on when the first switch is operated by the boat operator in the state where the electric power is supplied to the outboard motor in accordance with the instruction made by the electric power supply instruction step, and the security of the outboard motor is cancelled in accordance with the instruction made by the security cancellation instruction step; a start instruction step of instructing the start of the outboard motor when the determination step determines that the emergency switch is not on; and a stop instruction step of instructing a stop of the supply of electric power to the outboard motor when the determination step determines that the emergency switch is on. 
     A program of the present invention is a program for performing a control to start and stop an outboard motor in accordance with an instruction made by a boat operator, the program causing a computer to execute: an authentication step of performing an authentication of a portable machine carried by the boat operator via a communication part in accordance with an operation of a first switch made by the boat operator; an electric power supply instruction step of instructing a supply of electric power to the outboard motor based on a success of the authentication of the portable machine performed by the authentication step; a security cancellation instruction step of instructing a cancellation of security of the outboard motor based on the success of the authentication of the portable machine performed by the authentication step; a determination step of determining whether or not an emergency switch is on when the first switch is operated by the boat operator in the state where the electric power is supplied to the outboard motor in accordance with the instruction made by the electric power supply instruction step, and the security of the outboard motor is cancelled in accordance with the instruction made by the security cancellation instruction step; a start instruction step of instructing the start of the outboard motor when the determination step determines that the emergency switch is not on; and a stop instruction step of instructing a stop of the supply of electric power to the outboard motor when the determination step determines that the emergency switch is on. 
     Advantageous Effects of Invention 
     According to the present invention, it is possible to make a state where electric power is supplied to an outboard motor (ignition-on state) shift to a state where the supply of electric power to the outboard motor is stopped (ignition-off state) without starting the outboard motor. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view of a boat when seen from a diagonally rear direction. 
         FIG. 2  is a block diagram illustrating a configuration of an outboard motor system. 
         FIG. 3  is a flowchart illustrating processing of a start control device for an outboard motor. 
         FIG. 4  is a flowchart illustrating processing of the start control device for the outboard motor. 
         FIG. 5  is a diagram illustrating a functional configuration of the start control device. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Hereinafter, a preferred embodiment of the present invention will be described with reference to the attached drawings. 
       FIG. 1  is a perspective view of a boat when seen from a diagonally rear direction. As illustrated in  FIG. 1 , to a transom  2   a  located on a rear part of a hull  2  of a boat  1 , an outboard motor  40  having a propeller  48  is attached via a bracket device. 
     An operation cabin  4  is provided in an almost middle part of the hull  2 . In the operation cabin  4 , a steering handle  5  for steering the boat  1  and a remote control lever  6  are disposed. Further, in the operation cabin  4 , a start control device  20  for an outboard motor  40  is disposed. The start control device  20  performs a control to start or stop the outboard motor  40 , and performs a control to cancel or execute a security of the outboard motor  40 . 
       FIG. 1  illustrates, out of components of the start control device  20 , a communication part  24 , a battery SW  28 , a start SW  30 , and an emergency SW  31 . The start control device  20  performs wireless communication with a later-described portable machine  10  carried by a boat operator, via the communication part  24 . The start control device  20  performs an authentication based on an encryption code received from the portable machine  10 , and in accordance with a result of the authentication, it instructs the outboard motor  40  to cancel the security or execute the security. Further, the start control device  20  starts the authentication in accordance with an operation of the start SW  30  made by the boat operator, and instructs the outboard motor  40  to start or stop. Further, the start control device  20  instructs the outboard motor  40  to stop in accordance with an operation of the emergency SW  31  made by the boat operator in an emergency. 
     Here, as illustrated in  FIG. 1 , the communication part  24  of the present embodiment is disposed in, other than the operation cabin  4 , a plurality of places such as a bow and a stern. Specifically, a plurality of the communication parts  24  are disposed so that the communication with the start control device  20  can be performed as long as the boat operator who carries the portable machine  10  exists in the hull  2 . Therefore, even if the boat operator who carries the portable machine  10  does not exist in the operation cabin  4 , as long as he/she exists in the hull  2 , the authentication can be conducted with the portable machine  10  even if another person operates the start SW  30 . Therefore, even the other person can steer the outboard motor  40 . 
       FIG. 2  is a block diagram illustrating a configuration of an outboard motor system  100 . In  FIG. 2 , components same as those in  FIG. 1  are denoted by the same reference numerals. Hereinafter, a concrete configuration of the outboard motor system  100  will be described. The outboard motor system  100  has the portable machine  10 , the start control device  20 , and the outboard motor  40 . 
     The portable machine  10  is a so-called electronic key capable of being carried by the boat operator. The portable machine  10  can perform wireless communication with the start control device  20 . The portable machine  10  has a control part  11 , a storage part  12 , a communication part  13 , a battery  14 , an up SW  15 , a down SW  16  and the like. 
     The control part  11  controls the entire portable machine  10 . The control part  11  transmits, in accordance with an instruction made by the start control device  20 , an encryption code stored in the storage part  12  to the start control device  20 . The storage part  12  stores a program executed by the control part  11 , the encryption code and the like. The communication part  13  is an antenna, for example, and transmits/receives data to/from the communication part  24  of the start control device  20 . The battery  14  supplies electric power to the control part  11  and the like. 
     The up SW  15  and the down SW  16  are switches which are pressed-down when the boat operator wants to adjust a power of the outboard motor  40  at a time of berthing the boat  1 , and the like. Concretely, the up SW  15  and the down SW  16  are switches which are pressed-down when the boat operator wants to adjust an engine speed of the outboard motor  40  within a low speed range. The up SW  15  is a switch which is pressed-down when the boat operator wants to increase the engine speed within the low speed range. The down SW  16  is a switch which is pressed-down when the boat operator wants to decrease the engine speed within the low speed range. When the up SW  15  or the down SW  16  is pressed-down, the control part  11  transmits a signal corresponding to the up SW  15  or the down SW  16  to the start control device  20  via the communication part  13 . 
     The start control device  20  can communicate with the portable machine  10  and the outboard motor  40 . The start control device  20  has a smart unit  21 , the communication part  24 , a display part  25 , a notification part  26 , a power source relay  27 , a battery SW  28 , a battery  29 , a start SW  30 , an emergency SW  31  and the like. Further, the smart unit  21  configures a so-called computer including a control part  22  and a storage part  23 . 
     The control part  22  controls the entire start control device  20 . The control part  22  performs an authentication based on the encryption code received from the portable machine  10 , and instructs, in accordance with a result of the authentication, the outboard motor  40  to cancel the security or to execute the security. Further, in accordance with an operation of the start SW  30 , the control part  22  instructs the outboard motor  40  to start or stop. The storage part  23  stores a program executed by the control part  22 , an encryption code for collation (referred to as a collation code, hereinafter) and the like. The communication part  24  is an antenna, for example, and transmits/receives data to/from the communication part  13  of the portable machine  10 . The display part  25  is a liquid crystal monitor, for example, and displays a driven state and the like of the outboard motor  40 . The notification part  26  is a buzzer, an LED or the like, for example, and performs notification to the boat operator using a sound or light. 
     The power source relay  27  is disposed in the middle of a power source cable  33  which connects the battery  29  and the outboard motor  40 . The power source relay  27  is controlled to be turned on or off by the control part  22 . The battery SW  28  is disposed between the battery  29  and the smart unit  21 . When the battery SW  28  is turned on by the boat operator, the electric power is supplied from the battery  29  to the smart unit  21 . Further, when the battery SW  28  is turned off by the boat operator, the supply of electric power from the battery  29  to the smart unit  21  is stopped. The battery  29  also supplies electric power to the start control device  20 , the outboard motor  40 , and a later-described accessory  50 . 
     The start SW  30  is, for example, a push switch as a first switch. The start SW  30  is a switch which is pressed-down when the boat operator starts or stops the outboard motor  40 . 
     The emergency SW (emergency switch)  31  is a switch for stopping the outboard motor  40  in an emergency, and an insertion/extraction member can be inserted/extracted into/from the switch. In a state where the insertion/extraction member is inserted into the emergency SW  31 , the emergency SW  31  is off, and it is possible to continuously drive the outboard motor  40 . On the other hand, in a state where the insertion/extraction member is extracted from the emergency SW  31 , the emergency SW  31  is turned on, and the control part  22  stops the outboard motor  40 . Normally, the insertion/extraction member is connected to the boat operator via a code. Therefore, if the boat operator falls into water, for example, the insertion/extraction member is extracted from the emergency SW  31 , so that the emergency SW  31  is turned on, resulting in that the outboard motor  40  stops. 
     The outboard motor  40  can perform communication with the start control device  20  via a communication cable  32 . Although explanation will be made on a case where the outboard motor  40  of the present embodiment rotates the propeller  48  using an engine, the present invention is not limited to this case, and can also be applied to an electric outboard motor which rotates the propeller  48  using a motor. The outboard motor  40  has an ECU  41 , an injector  44 , an ignition coil  45 , a starter relay  46 , a starter motor  47  and the like. Further, the ECU  41  is configured by including a control part  42  and a storage part  43 . 
     The control part  42  controls the entire outboard motor  40 . In accordance with an instruction made by the start control device  20 , the control part  42  cancels the security of the outboard motor  40  or executes the security of the outboard motor  40 . Here, the security includes a mechanical locking method of locking a predetermined member of the outboard motor  40 , an electrical locking method in which the control part  42  prevents the operation of the predetermined member, and the like. Further, the control part  42  starts or stops the outboard motor  40  in accordance with an instruction made by the start control device  20 . The storage part  43  stores a program executed by the control part  42  and the like. The injector  44  injects a fuel in accordance with an instruction made by the control part  42 . The ignition coil  45  ignites an ignition plug in accordance with an instruction made by the control part  42 . The starter relay  46  is turned on in accordance with an instruction made by the control part  42 , to thereby drive the starter motor  47 . The starter motor  47  forcibly rotates a crankshaft to start the outboard motor  40 . 
     Further, to the outboard motor system  100 , the accessory  50  can be connected. The accessory  50  is, for example, a fish finder or the like. The accessory  50  is connected to the power source cable  33  between the power source relay  27  and the outboard motor  40 . When the battery SW  28  is turned on and the power source relay  27  is turned on, the electric power is supplied to the accessory  50  from the battery  29 . Specifically, the accessory  50  can be used even if the outboard motor  40  is not started. 
     In the outboard motor system  100  configured as described above, the boat operator sometimes wants to stop, from the state where the electric power is supplied from the battery  29  to the outboard motor  40 , the supply of electric power to the outboard motor  40  without starting the outboard motor  40 . This concretely indicates a case where the boat operator wants to use only the accessory  50  without starting the outboard motor  40 , and to stop, after using the accessory  50 , the supply of electric power to the accessory  50  and the outboard motor  40 , and the like. In the outboard motor system  100  of the present embodiment, it is possible to stop the supply of electric power to the accessory  50  and the outboard motor  40 , through a relatively simple operation conducted by the boat operator. 
     Hereinafter, processing performed by the outboard motor system  100  of the present embodiment will be described with reference to a flowchart illustrated in  FIG. 3 . The flowchart illustrated in  FIG. 3  is realized when the control part  22  of the smart unit  21  in the start control device  20  executes the program stored in the storage part  23 . Further, processing conducted by the portable machine  10  is realized when the control part  11  of the portable machine  10  executes the program stored in the storage part  12 , and processing conducted by the outboard motor  40  is realized when the control part  42  of the ECU  41  of the outboard motor  40  executes the program stored in the storage part  43 . 
     First, in step S 10 , the control part  22  of the smart unit  21  determines whether or not the battery SW  28  is turned on by the boat operator. When the battery SW  28  is turned on, the process proceeds to step S 11 . 
     In step S 11 , the control part  22  activates the entire start control device  20  including the smart unit  21  with the use of the electric power supplied from the battery  29 . 
     In step S 12 , the control part  22  determines whether or not the start SW  30  is turned on by the boat operator. When the start SW  30  is turned on, the process proceeds to step S 13 , and when it is not turned on, the control part  22  waits until the start SW  30  is turned on. 
     In step S 13 , the control part  22  checks the security, and determines whether or not the security is being executed. For example, by reading information stored in the storage part  23  indicating that the security is executed, the control part  22  can determine whether or not the security is being executed. When the security is being executed, the process proceeds to step S 14 , and when the security is not being executed, the process proceeds to step S 16 . 
     In step S 14 , the control part  22  performs wireless communication with the portable machine  10  via the communication part  24 , and performs an authentication of the portable machine  10 . This processing corresponds to one example of processing performed by an authentication means. As described above, the plurality of communication parts  24  are disposed in the hull  2 , so that as long as the boat operator who carries the portable machine  10  exists in the hull  2 , it is possible to perform the wireless communication with the portable machine  10 . Therefore, even if a person who operates the start SW  30  in step S 12  is not the boat operator who carries the portable machine  10 , the authentication is conducted. Concretely, the control part  22  transmits, to the portable machine  10 , an instruction indicating the transmission of encryption code. The control part  11  of the portable machine  10  transmits, in accordance with the instruction, the encryption code stored in the storage part  12  to the start control device  20 . 
     In step S 15 , the control part  22  performs an authentication whether or not the received encryption code coincides with a collation code stored in the storage part  23 . When the encryption code and the collation code coincide with each other and the authentication is succeeded, the process proceeds to step S 16 . On the other hand, in the case where the encryption code and the collation code do not coincide with each other and the authentication does not succeed, and the like, the process returns to step S 12 . Therefore, when the authentication does not succeed, the process cannot proceed to the next step S 16 . 
     In step S 16 , the control part  22  instructs the power source relay  27  to supply electric power to the outboard motor  40 . This processing corresponds to one example of processing performed by an electric power supply instruction means. Concretely, when the control part  22  turns on the power source relay  27 , the electric power is supplied to the outboard motor  40  from the battery  29  via the power source cable  33 . Under this state, the electric power is supplied also to the accessory  50  from the battery  29 , so that the boat operator can use the accessory  50 . A state in which the electric power is supplied to the outboard motor  40  and the accessory  50  without starting the outboard motor  40  as described above is set to be referred to as an ignition-on state. On the other hand, a state where the power source relay  27  is in an off state, and the electric power is not supplied to the outboard motor  40  and the accessory  50  from the battery  29  is set to be referred to as an ignition-off state. 
     In step S 17 , the control part  22  performs communication with the ECU  41  of the outboard motor  40  via the communication cable  32 , and instructs the outboard motor  40  to cancel the security. This processing corresponds to one example of processing performed by a security cancellation instruction means. Concretely, the control part  22  transmits, to the outboard motor  40 , an order to cancel the security. The control part  42  of the ECU  41  of the outboard motor  40  cancels the security in accordance with the order. Note that when the security is not being executed, the control part  22  omits step S 17 . 
     In step S 18 , the control part  22  determines whether or not the start SW  30  is turned on by the boat operator. Here, a case where the boat operator presses-down the start SW  30  for starting the outboard motor  40  from the ignition-on state, and a case where the boat operator presses-down the start SW  30  for returning the ignition-on state to the ignition-off state after finishing the use of the accessory  50 , for example, exist. When the start SW  30  is turned on, the process proceeds to step S 19 , and when it is not turned on, the control part  22  waits until the start SW  30  is turned on. 
     In step S 19 , the control part  22  performs communication with the outboard motor  40 , and determines whether or not the outboard motor  40  is being driven. Concretely, the control part  22  obtains information regarding an engine speed from the control part  42  of the outboard motor  40 , and determines whether or not the engine speed is 0 (zero). When the outboard motor  40  is not being driven, the process proceeds to step S 20 . When the outboard motor  40  is being driven, the process proceeds to step S 22 . When the process proceeds to step S 19  for the first time after starting the flowchart in  FIG. 3 , the process proceeds to step S 20  since the outboard motor  40  is not being driven. 
     In step S 20 , the control part  22  determines whether or not the emergency SW  31  is on. This processing corresponds to one example of processing performed by a determination means. When the emergency SW  31  is not on, the process proceeds to step S 21 , and the control part  22  transmits, to the outboard motor  40 , an instruction of starting the outboard motor  40 . This processing corresponds to one example of processing performed by a start instruction means. The control part  42  of the outboard motor  40  starts the outboard motor  40  in accordance with the instruction. Concretely, the control part  42  injects the fuel with the use of the injector  44  while rotating the starter motor  47  via the starter relay  46 , and ignites the ignition plug via the ignition coil  45 , to thereby start the engine. 
     On the other hand, when the emergency SW  31  is on, the process proceeds to step S 23 , and the control part  22  makes the process proceed to processing of later-described step S 23  and thereafter in which the supply of electric power to the outboard motor  40  is stopped. 
     In the outboard motor system  100  of the present embodiment, when the emergency SW  31  is off at the time of turning on the start SW  30  under the ignition-on state, the outboard motor  40  is started, and when the emergency SW  31  is on, the outboard motor  40  is not started, and the ignition-on state shifts to the ignition-off state. Therefore, through a relatively simple operation in which the boat operator presses-down the start SW  30  under the state where the insertion/extraction member is extracted from the emergency SW  31 , it is possible to make the ignition-on state shift to the ignition-off state without starting the outboard motor  40 . 
     Next, after the outboard motor  40  is started in step S 21 , the process returns to step S 18 , and the control part  22  determines whether or not the start SW  30  is turned on. When the start SW  30  is turned on, the process proceeds to step S 19 . In step S 19 , it is determined that the outboard motor  40  is being driven, and the process proceeds to step S 22 . 
     In step S 22 , the control part  22  transmits, to the outboard motor  40 , an instruction of stopping the outboard motor  40 . This processing corresponds to one example of processing performed by a stop instruction means. The control part  42  of the outboard motor  40  stops the outboard motor  40  in accordance with the instruction. Concretely, the control part  42  stops the injection conducted by the injector  44 , and stops the ignition using the ignition plug via the ignition coil  45 . As described above, in the state where the outboard motor  40  is being driven, the boat operator can stop the outboard motor  40  by turning on the start SW  30 . 
     In step S 23 , the control part  22  performs wireless communication with the portable machine  10 , and performs an authentication of the portable machine  10 . This processing is similar to that in step S 14 . Therefore, also in step S 23 , the authentication is performed as long as the boat operator who carries the portable machine  10  exists in the hull  2 . 
     In step S 24 , the control part  22  performs an authentication whether or not the received encryption code coincides with the collation code stored in the storage part  23 . When the encryption code and the collation code coincide with each other and the authentication is succeeded, the process proceeds to step S 25 . Note that in the case where the encryption code and the collation code do not coincide with each other and the authentication does not succeed, and the like, the process proceeds to step S 26 . 
     In step S 25 , the control part  22  performs communication with the ECU  41  of the outboard motor  40 , and instructs the outboard motor  40  to execute the security. Concretely, the control part  22  transmits, to the outboard motor  40 , an order to execute the security. The control part  42  of the ECU  41  executes the security in accordance with the order. Upon receiving, from the control part  42  of the ECU  41 , information indicating that the security is executed, the control part  22  notifies the boat operator that the security is executed, via the notification part  26 . Further, the control part  22  can store the information indicating that the security is executed, in the storage part  23 . Note that when the authentication does not succeed in step S 24  described above, the security in step S 25  is not executed. This is because a case where the boat operator loses the portable machine  10  after dropping it in water, is supposed. Specifically, by preventing the execution of security when the boat operator drops the portable machine  10  in water and the authentication does not succeed, it is possible to start the outboard motor  40  even with no portable machine  10  at the time of starting the flowchart in  FIG. 3  next time. 
     In step S 26 , the control part  22  turns off the power source relay  27 . When the power source relay  27  is turned off, the shift to the ignition-off state in which the supply of electric power to the outboard motor  40  and the accessory  50  is stopped is realized. 
     In step S 27 , the control part  22  determines whether or not the battery SW  28  is turned off by the boat operator. When the battery SW  28  is turned off, the process proceeds to step S 28 . When the battery SW  28  is not turned off, the process returns to step S 12 , in which the determination whether or not the start SW  30  is turned on is conducted again. 
     In step S 28 , the control part  22  turns off the power source of the start control device  20  including the smart unit  21 , resulting in that the processing of the outboard motor system  100  is terminated. 
     Next, processing after the outboard motor  40  is started in step S 21  in the flowchart in  FIG. 3  will be described with reference to a flowchart in  FIG. 4 . The flowchart illustrated in  FIG. 4  is realized when the control part  22  of the smart unit  21  in the start control device  20  executes the program stored in the storage part  23 . The control part  22  executes the processing in the flowchart illustrated in  FIG. 4  at fixed intervals. 
     In step S 30 , the control part  22  performs wireless communication with the portable machine  10  via the communication part  24 , and performs an authentication of the portable machine  10 . This processing is similar to that in step S 14 . Therefore, also in step S 30 , the authentication is performed as long as the boat operator who carries the portable machine  10  exists in the operation cabin  4 . 
     In step S 31 , the control part  22  performs an authentication whether or not the received encryption code coincides with the collation code stored in the storage part  23 . When the encryption code and the collation code coincide with each other and the authentication is succeeded, the processing is terminated. On the other hand, when the authentication does not succeed, the process proceeds to step S 32 . 
     In step S 32 , the control part  22  performs communication with the ECU  41  of the outboard motor  40 , and gives an instruction of decreasing the power of the outboard motor  40 . This processing corresponds to one example of processing performed by a power instruction means. The control part  42  of the ECU  41  of the outboard motor  40  decreases the power of the outboard motor  40 , namely, it decreases the engine speed, in accordance with the instruction. 
     As described above, the reason why the control part  22  performs the authentication of the portable machine  10  after starting the outboard motor  40 , is because the case where the boat operator drops the portable machine  10  in water is supposed. Specifically, the case where the authentication does not succeed also includes a case where the portable machine  10  is dropped in water and thus the control part  22  cannot receive the encryption code from the portable machine  10 . By taking such a case into consideration, the control part  22  performs the authentication with the portable machine  10  at fixed intervals, and when the authentication does not succeed, by decreasing the power of the outboard motor  40 , it is possible to make it easy for the boat operator to perform searching on a surface of water in the periphery of the outboard motor  40 . 
     As described above, according to the present embodiment, through a relatively simple operation such that the boat operator presses-down the start SW  30  in the state where the insertion/extraction member is extracted from the emergency SW  31 , it is possible to shift the ignition-on state to the ignition-off state. Therefore, even when the boat operator uses only the accessory  50 , for example, under the ignition-on state, it is possible to shift the ignition-on state to the ignition-off state in which the supply of electric power to the outboard motor  40  is stopped, without starting the outboard motor  40 . 
     Further, the emergency SW  31  is normally a switch used after starting the outboard motor  40 , and normally, it is not used before starting the outboard motor  40 . Therefore, by performing, with the use of the emergency SW  31  which is used only after the start of the outboard motor  40 , the switching whether to start the outboard motor  40  or to stop the supply of electric power to the outboard motor  40 , it is not necessary to newly add a switch for performing the switching, and thus there is no chance of increasing the product cost. 
     Further, according to the present embodiment, since the plurality of communication parts  24  each capable of performing the wireless communication with the portable machine  10  are disposed in the hull  2 , it is possible to perform the wireless communication with the portable machine  10  as long as the boat operator who carries the portable machine  10  exists in the hull  2 . Therefore, as long as the boat operator who carries the portable machine  10  exists in the hull  2 , even another person can perform the operation for making the outboard motor  40  cancel the security or execute the security, resulting in that a convenience of the outboard motor system  100  can be improved. 
       FIG. 5  is a diagram illustrating one example of a functional configuration of the start control device for the outboard motor. The functional configuration illustrated in  FIG. 5  is realized when the control part  22  executes the program stored in the storage part  23 . 
     The start control device  20  is configured by including an authentication unit  61 , an electric power supply instruction unit  62 , a security cancellation instruction unit  63 , a determination unit  64 , a start instruction unit  65 , a stop instruction unit  66 , and a power instruction unit  67 . 
     The authentication unit  61  performs the authentication of the portable machine  10  carried by the boat operator via the communication part  24 . 
     When the authentication of the portable machine  10  is succeeded, the electric power supply instruction unit  62  instructs the supply of electric power to the outboard motor  40 . 
     When the authentication of the portable machine  10  is succeeded, the security cancellation instruction unit  63  instructs the cancellation of security of the outboard motor  40 . 
     The determination unit  64  determines, when the start SW  30  is turned on, whether or not the emergency SW  31  is on. 
     The start instruction unit  65  instructs the start of the outboard motor  40 . 
     The stop instruction unit  66  instructs the stop of the supply of electric power to the outboard motor  40 . 
     The power instruction unit  67  instructs the outboard motor  40  to increase or decrease the power. 
     In the foregoing, the present invention has been described by the above-described embodiment, but, the present invention is not limited only to the above-described embodiment, and a change can be made within the scope of the present invention. 
     For example, although the above-described embodiment describes the case where the boat operator instructs the start of the outboard motor  40  or the stop of the outboard motor  40  by using the start SW  30 , the present invention is not limited to this case. For example, it is also possible to configure such that the start of the outboard motor  40  is instructed or the stop of the outboard motor  40  is instructed via a switch provided to the portable machine  10 . Therefore, in step S 12  and step S 18  described above, it is determined whether or not the start SW  30  is turned on, but, it is also possible to determine whether or not the switch of the portable machine  10 , instead of the start SW  30 , is turned on. For example, in step S 12  and step S 18 , it is also possible to determine whether or not a long pressing of the up SW  15  or the down SW  16  is conducted, and it is also possible to determine whether or not a switch which is different from the up SW  15  or the down SW  16  and is newly provided to the portable machine  10 , is turned on. 
     Further, the above-described embodiment describes the case where the control part  22  turns on or off the power source relay  27  as the instruction of supplying electric power or stopping the supply of electric power to the outboard motor  40 . However, the present invention is not limited to this case, and it is also possible to design such that the power source relay  27  is omitted, the control part  22  directly instructs the battery  29  to supply electric power or stop the supply of electric power to the outboard motor  40 , and the battery  29  supplies electric power or stops the supply of electric power to the outboard motor  40  in accordance with the instruction. 
     Note that the processing after the outboard motor  40  starts includes processing in which the control part  22  adjusts the power of the outboard motor  40  in accordance with the signal of the up SW  15  or the down SW  16  received from the portable machine  10 . The control part  22  transmits, every time it receives the signal of the up SW  15  or the down SW  16 , an instruction of increasing or decreasing the engine speed (power) of the outboard motor  40  within the low speed range (within a low power range). The control part  42  of the ECU  41  of the outboard motor  40  increases or decreases, in accordance with the instruction, the engine speed (power) of the outboard motor  40  within the low speed range (within the low power range). 
     Further, although the present embodiment describes the case where the above-described processing is realized when the control part  22  executes the program, the present invention is not limited to this case, and it is also possible that respective circuits configured by hardware execute the above-described processing. 
     Further, the present invention includes the above-described program and a computer readable recording medium which records the program. 
     INDUSTRIAL APPLICABILITY 
     The present invention can be utilized when cancellation and execution of security of an outboard motor are conducted by using an electronic key.