Patent Publication Number: US-8528506-B2

Title: Rotary internal combustion engine

Description:
This is a Continuation of application Ser. No. 12/675,061 filed Feb. 24, 2010, which is a National Phase of Application No. PCT/JP2009/052833 filed Feb. 19, 2009. The disclosure of the prior applications is hereby incorporated by reference herein in its entirety. 
    
    
     TECHNICAL FIELD 
     The present invention relates to a rotary internal combustion engine. 
     BACKGROUND TECHNOLOGY 
     Conventionally, various researches and studies have been made on a rotary internal combustion engine of a type in which combustion pressure directly provides rotation to a piston head. One example is a so-called Wankel cycle engine. 
     The Wankel cycle engine has conventional problems in that a rotor performs complicated movements that an approximately triangular rotor rotates while revolving, with an eccentric shaft being interposed, in a housing in a shape of an epitrochoid curve and in that leakage of fuel occurs. In the Wankel cycle engine, the rotor having received combustion pressure does not rotate directly and, when the rotor rotates while revolving in the housing, the interposing of the eccentric shaft is required. The eccentric shaft is equivalent to a crank shaft of a reciprocating mechanism. Therefore, the rotor of the Wankel cycle engine does not carry out purely circular movements. In an originally targeted rotary internal combustion engine, a face of a rotor secured to a working shaft in a cylinder is adapted to receive combustion expansion pressure and the rotor performs a circular movement and the combustion expansion pressure directly provides rotation to the working shaft. However, such a rotary internal combustion engine has not been realized yet. 
     In Patent Reference 1, for example, a rotary engine is disclosed which houses an approximately triangular rotor in cocoon-like housing having an inner circumferential surface in a shape of a trochoid curve.
     Patent Reference 1: Japanese Patent Application Laid-open No. 2007-298013.   

     DISCLOSURE OF THE INVENTION 
     Problems to be Solved by the Invention 
     There are three conventional obstacles to achievement of a rotary internal combustion engine. That is, since the space surrounding a rotor of the conventional rotary internal combustion engine has a well hole structure, the following problems arise: 
     a. It is difficult to construct a combustion chamber in a cylinder or in a manner to face cylinder space. 
     b. It is impossible to construct a starting point for a mechanical action which can provide combustion expansion pressure to a face of a rotor in a working stroke. 
     c. A malfunction occurs caused by seizure on a sliding face between a cylinder circumferential wall and rotor outer edge. 
     The present invention has been made in light of the problems described above and has an object to provide a rotary internal combustion engine as follow: 
     In a cylinder, being timed to the rotation of a rotor, cylinder space in a radial direction is shut off by a shutoff valve. Then, mixed air or high-pressure air and fuel are injected into a combustion chamber being a sealed layer formed between a rotor blade and the shutoff valve and, at the same time with the injection, the air and fuel are ignited or fired. Rotation is directly provided by combustion expansion pressure generated by the combustion to the rotor and to a working shaft secured to the rotor. It is another object of the present invention to provide the rotary internal combustion engine capable of preventing seizure occurring between the rotor outer edge and contact wall by interposing an elastic body such as a coil spring or a spring between a plurality of components in a rotor base and a rotor blade making up the rotor and by enabling the adjustment of a distance in left and right and upper and lower portions of the rotor. 
     Means for Solving Problems 
     To achieve above objects, according to an aspect of the present invention, there is provided a rotary internal combustion engine including a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface, a working shaft concentrically run through the cylinder and held so as to freely rotate, a rotor made up of a rotor base having a circular shell and a rotor blade standing in a radial direction of a rotor base surrounding wall, a shutoff valve to perform intermittent movements of insertion and returning between an outside of the cylinder and a cylinder space, and side ribs each having a longitudinal vale groove, wherein, in cylinder space, both side faces of the rotor base and all outer edge portions of the rotor blade are hermetically in contact with left and right walls and wherein, when the insertion of the shutoff valve into cylinder space is completed, both ends of the shutoff valve are hermetically in contact with two longitudinal valve grooves formed in left and right side ribs, wherein an upper portion of the shutoff valve is hermetically in contact with horizontal valve grooves formed in the cylinder circumferential wall and a lower end surface of the shutoff valve is hermetically in contact with the rotor base circumferential wall to form a sliding face of the rotor base, wherein, immediately after the rotor blade passes through a position of the shutoff valve, the shutoff valve is inserted into the cylinder space to shut off the cylinder space in a radial direction and compressed mixed air or compressed air and fuel are injected into a sealed layer, serving as a combustion chamber, formed between the shutoff valve and the rotor blade to be ignited or fired and the rotor blade is pressed with combustion expansion pressure, with the shutoff valve as a starting point for a mechanical action, to directly provide rotation to the working shaft and combustion gas is released into an exhaust hole and the shutoff valve is returned back to an outside of the cylinder for preparation of a next stroke to terminate one working stroke. 
     Effects of the Invention 
     With the above configuration, in the cylinder, being timed to the rotation of the rotor, cylinder space in a radial direction can be shut off by the shutoff valve. Then, mixed air or high-pressure air and fuel are injected into the combustion chamber being the sealed layer formed between the rotor blade and the shutoff valve and, at the same time with the injection, the air and fuel are ignited or fired and, therefore, rotation can be directly provided by combustion expansion pressure generated by the combustion to the rotor and the working shaft secured to the rotor. Seizure occurring between a rotor outer edge and contact wall can be prevented by interposing the elastic body such as a coil spring or a spring between a plurality of components in the rotor base and the rotor blade making up the rotor and by enabling the adjustment of a distance in left and right and upper and lower portions of the rotor. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a partial cross-sectional view of a rotary internal combustion engine according to the first embodiment of the present invention. 
         FIG. 2  is a cross-sectional view of the rotary internal combustion engine according to the first embodiment of the present invention. 
         FIGS. 3(   a ) to ( d ) are a diagram showing a state of rotation and of a rotor blade and opening/closing of a shutoff valve of the rotary internal combustion engine according to the first embodiment. 
         FIG. 4  is an exploded perspective view of a rotor of the rotary internal combustion engine according to the first embodiment. 
         FIGS. 5  ( a ) to ( c ) are a diagram showing one example of a depth-of-cut matching method or the like according to the first embodiment. 
         FIGS. 6  ( a ) and ( b ) are a diagram showing other examples of the depth-of-cut matching method or the like according to the first embodiment. 
         FIGS. 7  ( a ) and ( b ) are a diagram showing a configuration in which a ski is attached to a seal plate according to the first embodiment. 
         FIG. 8  is a partial cross-sectional diagram of a rotary internal combustion engine according to a second embodiment. 
         FIG. 9  is a partial cross-sectional diagram of a rotary internal combustion engine according to the second embodiment. 
         FIG. 10  is a partial cross-sectional diagram of a rotary internal combustion engine according to a third embodiment. 
         FIG. 11  is a partial cross-sectional diagram of a rotary internal combustion engine according to the third embodiment. 
         FIG. 12  is a partial cross-sectional diagram of a rotary internal combustion engine according to a fourth embodiment. 
         FIG. 13  is a partial cross-sectional diagram of a rotary internal combustion engine according to the fourth embodiment. 
         FIG. 14  is a partial cross-sectional diagram of a rotary internal combustion engine according to a fifth embodiment. 
         FIG. 15  is a partial cross-sectional diagram of a rotary internal combustion engine according to a sixth embodiment. 
         FIG. 16  is a partial cross-sectional diagram of a rotary internal combustion engine according to the sixth embodiment. 
     
    
    
     EXPLANATION OF NUMERALS AND CHARACTERS 
     
         
         
           
               1 : Cylinder,  2 : Side rid,  3 : Working shaft,  4 : Cylinder circumferential wall,  5 : Side internal wall,  6 : Jetting nozzle,  7 : Ignition plug,  8 : Cylinder space,  9 : Combustion chamber,  10 : Rotor,  11 : Rotor base,  12 : Side rotor base,  13 : Rotor base surrounding wall,  15 : Shaft bush,  17 : Bearing,  20 : Rotor blade,  21 : Blade base plate,  22 : Side seal plate,  23 : Top seal plate,  24 : Corner seal plate,  25 : Base plate,  26 : Rib,  27 : Pressing plate,  28 : Ski,  31 : Shutoff valve,  32 : Valve body,  33 : Adjusting valve,  34 ,  35   a  to  35   d : Coil spring,  37 : Bolt,  38   a  and  38   b : Pin,  39   a  and  39   b : Floating hole,  40 : Longitudinal valve groove,  41 : Horizontal valve groove,  42 : Exhaust hole,  50 : Switching pointer,  61 : Valve reciprocating mechanism,  151 : Lifting electromagnet,  156 : Suction electromagnet. 
           
         
       
    
     BEST MODE CARRYING OUT THE INVENTION 
     Hereinafter, suitable embodiments of a rotary internal combustion engine of the present invention are described by referring to drawings. The present invention is not limited to the embodiments described above but may be changed and modified, if necessary, without departing from the scope and spirit of the invention. 
     First, positional relation and terminology of parts or components of the rotary internal combustion engine of the present invention are explained and defined as follow. 
     (a) In each of drawings, as a general rule, it is supposed that a working shaft of the rotary internal combustion engine is set up in a horizontal position. Hereinafter, its parts or components are described by referring to each of the drawings. 
     (b) In a cylinder, in order to specify the positional relation of a rotor, its shaft center direction is treated as a lower position and its circumferential inner wall direction is treated as an upper position. This is applied to any rotation angle. 
     (c) In a back-and-forth relation of a rotary internal combustion engine, while a rotor is rotating, a direction in which a certain portion passes under a horizontal valve groove of the shutoff valve and moves forward is defined as a forth direction. 
     (d) A “sealed layer” is space which is formed between a rotating rotor and the shutoff valve while the shutoff valve cuts off a cylinder circumferential space. The sealed layer and a combustion chamber is the same and the combustion chamber is called a sealed layer before air and fuel are injected therein. 
     (e) A “seizure prevention distance” refers to a distance that can prevent seizure owing to expansion distance occurring by combustion heat and sliding. 
     (f) A “one working stroke” refers to a series of work including the formation of the sealed layer between the shutoff valve and rotating rotor in a cylinder, injection of fuel or air into the sealed layer, rotation of the rotor and working shaft by combustion expansion pressure generated by ignition or firing, exhausting of combustion gas, and returning of the shutoff valve to an outside of the cylinder for movement to a next stroke. 
     (g) A “working angle” is an angle formed between the shutoff valve and rotor, with a shaft center as a starting point for a mechanical action, when the rotary internal combustion engine is driven. 
     (h) A “working distance” refers to a distance between a rotor blade and shutoff valve occurring at the time of ending of one working stroke and to a distance of a circular arc to be measured using an average position of height of the rotor blade. 
     (i) A “tangential angle” is an angle formed between the circumferential wall and left/right side walls. 
     Hereinafter, each embodiment is described grounded on the above definition. 
     First Embodiment 
       FIG. 1  is a partial cross-sectional view of a rotary internal combustion engine  601  of  FIG. 2  taken along a line a-a of the first embodiment of the present invention.  FIG. 2  is a partial cross-sectional view of the rotary internal combustion engine  601  of  FIG. 1  taken along a line b-b of the first embodiment.  FIGS. 3(   a ) to ( d ) show a state of the rotation of a rotor blade  20  and the opening/closing of a shutoff valve  31  of the rotary internal combustion engine  601  of the first embodiment.  FIG. 4  is an exploded perspective view of a rotor  10  of the rotary internal combustion engine  601  of the first embodiment. 
     As shown in  FIGS. 1 and 2 , in the rotary internal combustion engine  601  of the embodiment, a working shaft  3  is run concentrically through a cylinder  1  and the rotor  10  is attached to the working shaft  3  in a fixed manner. That is, in a center of the rotor  10  is formed an opened portion through which the working shaft  3  is run, whereby the rotor  10  and working shaft  3  are attached to each other in a secured manner. The rotor  10  is constructed of a rotor base  11  made up of a circular shell and a rotor blade  20  standing in a radial direction of a rotor base surrounding wall  13 . The rotor base  11  and rotor blade  20  are formed integrally. Shaft bushes  15  disposed in a center of a circle of each of side lids  2  disposed on left/right end surfaces of the cylinder  1  are adapted to support the working shaft  3 . Between the shaft bush  15  and working shaft  3  is provided a bearing  17  to make smooth the rotation of the working shaft  3 . In a cylinder space  8 , all portions including both side surfaces of the rotor base  11  and outer edge portions of the rotor blade  20  are hermetically in contact with left and right side internal walls  5  and cylinder circumferential wall  4 . This contact state is maintained in any rotation angle of the rotor  10  formed by the rotation of the working shaft  3 . 
     The shutoff valve  31  is mechanically connected to a valve reciprocating mechanism  61  via a valve attaching bar  43 . The shutoff valve  31  performs intermittent movements of insertion and returning between an outside of the cylinder  1  and cylinder space  8  by a driving force of the valve reciprocating mechanism  61 . At the time of being returned, the shutoff valve  31  is housed in a casing  45 . In the above configuration, when the insertion of the shutoff valve  31  into the cylinder space  8  is completed, both ends of the shutoff valve  31  are hermetically held by two longitudinal valve grooves  40  formed on the side lids  2 . An upper portion of the shutoff valve  31  is hermetically held by a horizontal valve groove  41  formed in the cylinder circumferential wall  41 . The lower end face of the shutoff valve  31  is hermetically in contact with the rotor base surrounding wall  13 , thereby making up a sliding surface of the rotor base  11 . 
     In the operation of the rotary internal combustion engine  601 , immediately after the rotor blade  20  passes through a position of the shutoff valve  31 , the shutoff valve  31  is inserted by the valve reciprocating mechanism  61  into the cylinder space  8  and a portion of the cylinder space  8  in a radius direction is shut off (see  FIG. 3(   a )). At this point of time, compressed mixed air or compressed air and fuel are injected into the sealed layer  9 , which serves as a combustion chamber  9 , formed between the shutoff valve  31  and rotor blade  20  and, in the combustion chamber  9 , the compressed air and fuel are ignited or fired by an ignition plug  7 . Moreover, switching of ignition or firing by the ignition plug  7  is controlled by a switching pointer  50 . Combustion expansion pressure generated at this time causes the rotor blade  20  to be pressed, with the shutoff valve  31  as a starting point for a mechanical action, thus directly providing rotation to the working shaft  3  (see  FIG. 3(   b ) and FIG. ( c )). Then, combustion gas is released to an exhaust hole  42  formed in an appropriate position of the side internal wall  5  or cylinder circumferential wall  4  existing in a place where the rotation of the rotor  10  almost ends (see  3 ( d )) and, for preparation for a next stroke, the shutoff valve  31  is returned back by the valve reciprocating mechanism  61  to the outside of the cylinder  1 , when one working stroke ends. Thus, one of the characteristics of the rotary internal combustion engine  601  is that the combustion chamber  9  is formed in the cylinder space  8  and the combustion expansion pressure provides rotation to the rotor  10  and working shaft  3 , with the shutoff vale  31  a starting point for a mechanical action. Moreover, on the exhaust hole  42 , a bridging plate  29  is provided to make smooth the movement of the rotor blade  20 . 
     As shown in  FIG. 1 , according to the present embodiment, at the time of insertion of the shutoff valve  31  into the cylinder space  8 , in order to prevent mutual interference accidents such as fretting and/or collision occurring between a lower end face of the shutoff valve  31  and rotor base surrounding wall  13  and in order to facilitate the start of smooth sliding between the lower end face of the shutoff valve  31  and rotor base surrounding wall  13 , the rotary internal combustion engine  601  has following configurations. 
     That is, by shortening a radial distance by a interference prevention distance H in a circular rotational angle region W of the rotor base  11  in a manner to be timed to the insertion of the shutoff valve  31  into the cylinder space  8 , the rotor base surrounding wall  13  is changed to have a cam-like shape. Moreover, the shutoff valve  31  has a structure employing a so-called a “longitudinal insertion” method by which the shutoff valve  31  is inserted and withdrawn into a circumferential space of the cylinder  1  in a radial direction and, however, the shutoff valve  31 , when being returned to the outside of the cylinder, rises in a state where the shutoff valve  31  faces upward, as a result, such a problem in the case of the insertion of the shutoff valve  31  as described above does not occur. Therefore, during the time while the shutoff valve  31  is returned back thereto, it is not necessary to change the shape of the rotor base surrounding wall  13  so as to have a cam-like shape. Thus, while the shutoff valve  31  is inserted into the cylinder space  8 , by shortening a radial distance of the rotor base  11  to change to have a cam-like shape, shock and mutual interference between the lower end face of the shutoff valve  31  and rotor base surrounding wall  13  can be prevented, thereby, enabling smooth start of sliding between the shutoff vale  31  and rotor base surrounding wall  13 . 
     On the other hand, as shown in  FIGS. 1 and 2 , according to the present embodiment, in order to prevent overheating and seizure occurring between the shutoff valve  31  and rotor base surrounding wall  13 , the rotary internal combustion engine  601  has the following structure. That is, by providing an adjusting valve  33  under a valve body  32  in the shutoff valve  31  and by interposing an elastic body (plate spring may be used) such as a coil spring  35   a  between the shutoff valve  31  and rotor base surrounding wall  13 , a distance between the shutoff valve  31  and rotor base surrounding wall  13  is adjusted. By configuring as above, the thermal expansion distance occurring at the time of working of the shutoff valve  31  is absorbed which enables the prevention of seizure therebetween. Also, hermeticity of the sliding face between the lower end face of the shutoff valve  31  and sliding face of the rotor base surrounding wall  13  is enhanced by stress of the coil spring  35   a  or the like. 
     Though illustrations are simplified in  FIGS. 1 and 2 , a gap between the shutoff valve  31  and rotor base surrounding wall  13  is stopped up by a depth-of-cut matching method, half-lap joint matching method, and superposition method by using materials for the components so as to maintain hermeticity in the back and forth portions of the shutoff valve  31 . Moreover, examples of the depth-of-cut matching method, half-lap joint matching method or the like are shown in  FIGS. 5  ( a ) to ( c ). Thus, by providing the adjusting valve  33  under the shutoff valve  31  to enable the adjustment of upper and lower distances using the elastic body such as the coil spring  35   a  or the like, it is made possible to prevent seizure between the lower end face of the shutoff valve  31  and rotor base surrounding wall  13  and to achieve smooth sliding therebetween. 
     Furthermore, as shown in  FIGS. 2 and 4 , according to the present embodiment, in order to prevent overheated seizure occurring between both the side ends of the rotor base  11  and left/right side internal walls and to maintain proper contact therebetween, the rotor base  11  is divided into a plurality of portions in the left and right directions. That is, the rotor base  11  is divided so that the divided rotor bases  11  are provided on left and right sides of the rotor base  11 . Then, among the divided rotor bases  11  are provided proper intervals used for the adjustment of distance of the thermal expansion distance and the left/right distances among the divided rotor bases  11  can be adjusted by using an elastic body such as a coil spring  35   c  or the like. Instead of the coil spring  35   c , a plate spring may be used. Hermeticity in the back and forth regions of the rotor  10  can be maintained by the depth-of-cut matching method, superposition method or the like of suing materials of the components. Moreover, examples of the depth-of-cut matching method, half-lap joint matching method, or the like are shown in  FIG. 6  ( a ) and ( b ). By configuring as above, seizure between the rotor base  11  and side internal wall  5  can be prevented and proper contact with the side internal wall  5  can be properly maintained. A hole of a pin  38   a  of each of the side rotor bases  12  is a floating hole relative to the pin  38   a  attached to the rotor base  11 . By configuring as above, the sliding between the left/right surfaces of the rotor  10  and contacted walls can be made smooth. 
     As shown in  FIGS. 1 ,  2 , and  4 , in the present embodiment, the rotor blade  20  is integrally formed with the rotor base  11 , however, the two components are different in shape and function from each other and each of them has its own individual measures to prevent the seizure. The top portion of the blade base plate  21  and its both side end faces are formed to have intervals for seizure prevention distance relative to the cylinder circumferential wall  4  and left/right wall  5 . A rear face of the blade base plate  21  is formed so as to be plane and to have a rectangular base plate  25  directing from a lower center of the plane portion of the blade base plate  21  toward an upper portion. Side seal plates  22  are disposed in left/right portions of the blade base plate  21 . On the upper portion of the blade base plate  21  is disposed a top seal plate  23 . At both tangential angle portions in the upper direction are disposed corner seal plates  24 . Each of the seal plates  22  to  24  is in a close contact with a facing wall so as to stop up a seizure preventing distance portion positioned between each external ends of the blade base plate  21  and each facing wall. A proper interval is provided between the internal end face of each of the above seal plates  22  to  24  and the base plate  25  and the interval is adjusted by using the coil springs  34  and  35  or plate spring or the like. Each of seal plates  22  to  24  is pushed by pressure to ensure contact between the cylinder circumferential wall  4  being facing wall relative to each of the seal plates  22  to  24  and the side internal wall  5 . 
     By junction among the seal plates  22  to  24  using the half-lap joint matching method shown in  FIGS. 6(   a ) to ( c ), hermeticity of back and forth portions of the rotor blade  20  is maintained. Each of components making up the seal plates  22  to  24  is held stably by using a pressing plate  27 . That is, in a state in which each of the seal plates  22  to  24  is sandwiched between the blade base plate  21  and pressing plate  27 , pins  38   b  is secured via coil springs  35   d  and nuts  36  to the bolt  37 . Moreover, though not shown, it is needless to say that a small spring, which is in contact in a state of being struck, may be disposed, at an angle of 45° at a corner on the base plate side  25  of the corner seal plate  24 . 
     By configuring as above, the distance in upper/lower and left/right directions of the rotor blade  20  is adjusted by using the coil springs  34  and  35   b  in a region from the seal plates  22  to  24  of the rotor blade  20  to the base plate  25  to prevent seizure between the cylinder circumferential wall  4  being a facing wall of the rotor blade  20  and the side internal wall  5  and to obtain excellent sliding between the cylinder circumferential wall  4  and side internal wall  5  while hermeticity in the back and forth regions of the rotor  10  is maintained. 
     In order to prevent an obstacle to the rotation of the rotor  10  caused by the interference including drop or engagement of each of the seal plates  22  to  24  into or with the longitudinal valve groove  40 , horizontal valve groove  41 , exhaust hole  42 , and an unillustrated oil collecting groove, which may occur at the time of the rotation of the rotor  10 , the following configuration is employed. That is, as shown in  FIGS. 7(   a ) and ( b ), each of the seal plates passing through each of the grooves or holes described above is provided with a bar called a ski  28  having an appropriate length so that each of the grooves or holes is bridged by the bar. More specifically, one configuration is shown in  FIG. 7(   a ) in which the top seal plate  23  is provided with the ski  28  and another configuration is shown in  FIG. 7(   b ) in which the corner seal plate  24  is provided with the ski  28 . In other drawings, the illustration of the ski  28  is simplified in some cases. By providing the seal plates  22  to  24  of the rotor blade  20  with a bridging lever called the ski  28  to bridge the grooves and holes, interference between grooves or holes and seal plates can be prevented. 
     As described above, the rotary internal combustion engine  601  of the first embodiment of the present invention includes the cylinder  1  having the cylinder circumferential wall  4  provided with a horizontal valve groove  41  formed on an internal circumferential face, the working shaft  3  run concentrically through the cylinder  1  and held so as to freely rotate, the rotor  10  attached to the working shaft  3  made up of the rotor base  11  constructed of a circular shell and the rotor blade  20  standing in a radial direction of the rotor base surrounding wall  13 , the side lid  2  having the shutoff valve  31  to perform an intermittent movement of insertion and returning between the outside of the cylinder  1  and the cylinder space  8  and the longitudinal valve groove  40 . In the cylinder space  8  in the cylinder  1 , both the side faces of the rotor base  11  and all outer edge portions of the rotor blade  20  are hermetically in contact with the left/right walls and, when the insertion of the shutoff valve  31  into the cylinder space  8  is completed, both sides of the shutoff valve  31  are hermetically held by two longitudinal valve grooves  40  disposed on the left/right side lids  2  and further the upper portion of the shutoff valve  31  is hermetically held by the horizontal valve groove  41  having the cylinder circumferential wall  41 . The lower end face of the shutoff valve  31  is hermetically in contact with the rotor base surrounding wall  13  to form a sliding face of the rotor base  11  and, immediately after the rotor blade passes through a position of the shutoff valve  31 , the shutoff valve  31  is inserted into the cylinder space  8  to stop up the cylinder space  8  in a radial direction and compressed mixed air or compressed air and fuel are injected into the sealed layer, serving as the fuel chamber  9 , formed between the shutoff valve  31  and rotor blade  20 . The air and fuel are ignited or fired in the fuel chamber  9  and the combustion expansion pressure generated by the ignition presses the rotor blade  20  with pressure, with the shutoff valve  31  as a starting point for a mechanical action, to directly provide rotation to the working shaft  3  and the combustion gas is released into the exhaust hole  42  and then the shutoff valve  31  is returned back to the outside of the cylinder  1  for preparation of a next stroke and one working stroke now ends. 
     Also, according to the rotary internal combustion engine  601  of the first embodiment of the present invention, in a manner to be timed to the insertion of the shutoff valve  31  into the cylinder space  8 , a radial distance in a rotation angle region W of the rotor base  11  is shortened by a distance corresponding to an interference prevention distance H and the rotor base surrounding wall  13  is changed so as to have a cam-like shape. 
     Also, according to the rotary internal combustion engine  601  of the first embodiment of the present invention, the shutoff valve  31  has the valve body  32  and the adjusting valve  33  disposed in a lower portion of the valve body  32  and, by interposing the elastic body between the valve body  32  and adjusting valve  33  to adjust a distance therebetween and the gap between the valve body  32  and adjusting valve  33  is stopped up by any one of the depth-of-cut matching method, half-lap joint matching method, superposition method of components making up the valve body  32  and adjusting valve  33  to enable the upper and lower distance to be adjusted. 
     Also, according to the rotary internal combustion engine  601  of the first embodiment of the present invention, the rotary base  11  is divided into a plurality of portions in left and right directions so that an appropriate interval exists among the divided portions and by using an elastic body among the divided portions to adjust left/right distances and hermeticity among divided portions including the back and forth portions of the rotor  10  is maintained by the depth-of-cut matching method, half-lap joint matching method, and superposition method of components making up the rotary base  11 , which enables the adjustment of left/right distances. 
     Also, according to the rotary internal combustion engine  601  of the first embodiment of the present invention, the rotor blade  20  includes the blade base plate  21 , the rectangular base plate  25  directing from a lower center of a plane portion of the rotor blade  21  upward, the side seal plates  22  disposed in the left and right directions of the base plate  25 , the top seal plate  23  disposed in an upper portion of the base plate  23 , and the corner seal plates  24  disposed at tangential angle portions in the upper portion of the base plate  23 . The top portion and both side end faces of the blade base plate  21  are formed to have intervals for seizure between the cylinder circumferential walls  4  and left and right internal walls  5 . Each of the side seal plate  22 , top seal plate  23 , and corner seal plate  24  stop up a portion corresponding to the seizure prevention distance between each outer end and each facing end of the blade base plate  21  and facing walls and are hermetically in contact with the facing walls. There is provided an appropriate interval between each of the internal side end faces of the side seal plate  22 , top seal plate  23 , and corner seal plate  24  and base plate  25  and these intervals can be adjusted by using the elastic body, and each of the seal plates  22  to  24  is pressed appropriately with pressure to ensure contacts between each of the seal plates  22  to  24  and the facing walls  4  and  5 . Hermeticity of the back and forth portions of the rotor blade  20  is maintained by a junction using any one of the depth-of-cut matching method, half-lap joint matching method, and superposition method using the components for the side seal plate  22 , top seal plate  23 , and corner seal plate  24 . 
     Also, according to the rotary internal combustion engine  601 , each hole and each groove are bridged by at least any of the seal plates  22  to  24  using the ski  28  having a predetermined length. 
     Therefore, in the first embodiment of the present invention, following effects can be achieved. That is, being timed to the rotation of the rotor  10 , the cylinder space  8  is shut off by the shutoff valve  31  in a radial direction and high pressure air and fuel are injected into the sealed layer, which serves as the combustion chamber  9 , formed by the rotor blade  20  and shutoff valve  31  and rotation is directly provided by the combustion expansion pressure caused by the jetting air and fuel to the rotor  10  and working shaft  3 , with the shutoff valve  31  as a starting point for a mechanical point. Moreover, by constructing the rotary internal combustion engine  601  which is driven by the rotation of the rotor  10  realizes the following effect. That is, in the case of the rotary internal combustion engine, since neither a rotational mechanism such as a crank nor an eccentric shaft are used and the engine is driven by a circular rotation of the rotor, movements of the engine can be simplified, resulting in loss in mechanical loss. As a special feature of the rotary internal combustion engine, high compression air, fuel, and the like are supplied from a specialized mechanism and, therefore, fuel expansion stroke is only the working stroke in the cylinder, thus preventing leakage of fuel during engine operations. Moreover, the rotary internal combustion engine can be made simple in its structure and small in its size and, therefore, the reduction in manufacturing costs and in mechanical loss, contraction of volume and weight can be achieved. The rotational direction of the rotor is the same, which causes no weight loss due to inertia. Due to decreased shock sound or friction sound during the operation of the engine, quietness can be kept. The rotary internal combustion engine, owing to its shape, is allowed to use a variety of fuels including not only gasoline or light oil but also natural gas, organic brewing fuel, heavy oil, hydrogen gas, and the like. The internal combustion engine has big and flexible capabilities to respond to a large or small scale. 
     The rotary internal combustion engine  601  of the first embodiment, the space surrounding the cylinder  1  is shut off and sealed by the shutoff valve  31  in a radial direction. Specifically, in order to prevent shock and mutual interference accident between the shutoff valve  31  and rotor base surrounding base  13  at the time of the insertion of the shutoff valve  31  into cylinder space, being timed to the insertion of the shutoff valve  31 , the radial distance of the rotor base  11  is shortened to change so as to have a cam-like shape so that shock and interference between the lower end face of the shutoff valve  31  and the rotor base surrounding wall  13  is avoided, thereby achieving mutual smooth start of sliding. 
     Moreover, by attaching the adjusting valve  33  under the shutoff valve  31 , the adjustment of the upper and lower distance between the shutoff valve  31  and rotor base surrounding wall  13  is made possible by using the elastic body such as the coil spring and, as a result, seizure between the lower end face of the cutoff valve  31  and the rotor base surrounding wall  13  is prevented and smooth sliding therebeween can be achieved. 
     In order to prevent overheating and seizure between the rotor  10  and cylinder circumferential wall  4  and side internal wall  5  coming in contact with each of left/right side faces of the rotor base  11 , the rotor  10  is divided into a plurality of portions in left and right directions and the distance in the left and right directions is adjusted by using the spring or the like disposed in a gap among the divided portions and sliding between each of the left/right side faces of the rotor  10  described above and the contacting wall is smoothed. 
     Also, by adjusting the up/down and left/right distances of the rotor blade  20  by using a coil spring or the like between the seal plates  22  to  24  of the rotor blade  20  and the base plate  25 , seizure between the rotor blade  20  and facing walls is prevented and excellent sliding between the rotor blade  20  and facing walls is obtained while still maintaining hermeticity in the forth and back portions of the rotor  10 . 
     By providing a bridging lever called the ski  28  to seal plates  22  to  44  of the rotor blade  20 , grooves and/or holes are bridged and mutual interference between the grooves an/or holes can be prevented. 
     Second Embodiment 
       FIG. 8  is a cross-sectional view of a rotary internal combustion engine  602  of  FIG. 9  taken along a line c-c according to the second embodiment of the present invention.  FIG. 9  is a cross-sectional view of the rotary internal combustion engine  602  of  FIG. 8  taken along a line e-e according to the second embodiment. 
     As shown in  FIGS. 8 and 9 , in the rotary internal combustion engine  602  of the second embodiment, a working shaft  103  is run concentrically through a cylinder  101  and the rotor  110  is attached to the working shaft  103  in a fixed manner. The rotor  110  includes a rotor blade  120  standing in a radial direction of a rotor base  111  made up of a circular shell and rotor base circumferential wall  113 . The rotor base  111  and rotor blade  120  are formed integrally. A shaft bush  115  disposed in a center of a circle of each of side lids  2  attached to left/right end surfaces of the cylinder  101  supports the working shaft  103 . Bearings  117  are provided between the shaft bush  115  and working shaft  103  to make the rotation of the working shaft  103  smooth. The shutoff valve  131  is mechanically connected via a valve pressing bar  144  to a valve reciprocating mechanism  161 . A flat shaft bush  158  is provided to smooth the operations of the shutoff valve  131  by using a valve pressing bar  144 . The shutoff valve  131  performs intermittent movements of insertion and returning between the outside of the cylinder  101  and cylinder space  108  by using driving force of the valve reciprocating mechanism  161 . The shutoff valve  131 , after the returning, is housed in a casing. The upper portion of the shutoff valve  131  is hermetically held in the horizontal valve groove formed in the cylinder circumferential wall  113  and the lower end face of the shutoff valve  131  is hermetically in contact with the rotor base surrounding wall  113  described above to form a sliding face of the rotor base  111 . 
     When the rotary internal combustion engine  602  is driven, the rotor blade  120  passes through the position of the shutoff valve  131  and, then immediately, the shutoff valve  131  is inserted by the valve reciprocating mechanism  161  into the cylinder space  108  to stop up the cylinder space  108  in a radial direction. The compressed mixed air or compressed air and fuel are injected by a jetting nozzle  106  facing the cylinder space  108  into a sealed layer serving as a combustion chamber  109  formed between the shutoff valve  131  and rotor blade  120  and the compressed air and fuel supplied from a compressed mixed air supplying mechanism  147  are ignited or fired by an igniting plug  107  in the combustion chamber  109 . The combustion expansion pressure presses the rotor blade  120 , with the shutoff vale  131  as a starting point for a mechanical action, to directly provide rotation to the working shaft  103 . Then, combustion gas is released into an exhaust hole  142  formed in an appropriate position of the side internal wall  5  or cylinder circumferential wall  4  existing in a place where the rotation of the rotor almost ends and, for preparation for a next stroke, the shutoff valve  131  is returned back by the valve reciprocating mechanism  161  to the outside of the cylinder  101 , when one working stroke ends. In the second embodiment, the combustion chamber  109  is formed in the cylinder space  108  and combustion expansion pressure generated in the combustion chamber  109  directly provides rotation to the rotor  110  and working shaft  103 , with the shutoff valve  131  as a starting point for a mechanical action. 
     On the other hand, a back face of the blade base plate  121  is formed so as to be plane and to have a rectangular base plate  125  directing from a lower center of the plane portion of the blade base plate  121  upward portion. Side seal plates  22  are disposed in left/right portions of the blade base plate  21 . On the upper portion of the blade base plate  21  is disposed a top seal plate  23 . At both tangential angle portions in the upper direction are disposed corner seal plates  24 . Each of the seal plates  22  to  24  is in a close contact with each of facing walls so as to stop up a seizure preventing distance portion positioned between each external end of the blade base plate  21  and each of the facing walls. A proper interval is provided between the internal end face of each of the above seal plates  122  to  124  and the base plate  125  and the interval is adjusted by using the coil springs  135 . At the same time, each of seal plates  122  to  124  is pushed with pressure to ensure mutual contact between each of the seal plates  122  to  124  and the cylinder circumferential wall  104 . In a state where the base plate  125  and each of the seal plates  122  to  124  are sandwiched between the blade base plate  121  and pressing plate  127 , the pin  138   b  is secured to the bolt  137 . 
     Then, particularly, in the second embodiment, at the time of insertion of the shutoff valve  131  into the cylinder space  8  and returning back to the outside of the cylinder  101 , in order to prevent contact interference such as fretting and/or collision occurring between a lower end face of the shutoff valve  131  and rotor base surrounding wall  13 , the rotary internal combustion engine has following configurations. That is, a lift electromagnet  151  is mounted on an upper end of the shutoff valve  131 . Two poles of the lift electromagnet  151  are hanging from left/right side faces of the shutoff valve  131  so that its lower end face is set to be positioned apart from left/right upper portions of the adjusting valve  133  by an interference prevention distance h. The switching of currents for the lifting electromagnet  151  is performed by a switching pointer  150 , electronic control, or the like. Power is supplied to an electromagnet coil  153  via an electrode  154  from a wiring  155 . 
     By configuring as above, at the time of the insertion of the shutoff valve  131  into the cylinder space  108 , while a state in which the adjusting vale  133  is being lifted by interference prevention distance h by applying power is kept, that is, while a distance between the adjusting valve  133  and rotor base surrounding wall  113  is maintained, the shutoff valve  131  is inserted into the cylinder space  108 . Then, being timed to the completion of the insertion of the shutoff valve  131 , supply of power to the lifting electromagnet  151  is stopped. When the adjusting valve  133  drops due to the stop of power supply, by applying power, via the wiring  160 , to a suction electromagnet  156  disposed in a lower portion of a longitudinal vale groove, a lower end surface of the adjusting valve  133  is sucked by stress of the suction electromagnet  156  to facilitate the drop of the adjusting valve  133 . The sliding between the lower end face of the shutoff valve  133  and rotor base surrounding wall  113  is stably maintained. Moreover, at the time of returning of the shutoff valve  131  to the outside of the cylinder  101 , power supply to the suction electromagnet is stopped and, at the same time, power is supplied to the lifting electromagnet  151  and the adjusting valve  133  is lifted by the interference prevention distance h to return the shutoff valve  131  to the outside of the cylinder  101 . The switching of currents to the suction electromagnet  156  is performed by the switching pointer  150 , electronic control, or the like. 
     As described above, the rotary internal combustion engine  602  of the second embodiment includes the lifting electromagnet  151  disposed on a top portion of the shutoff valve  131  and the suction electromagnet  156  disposed in the lower portion of the longitudinal valve groove. Two poles of the lift electromagnet  151  are hanging from left/right side faces of the shutoff valve  131  so that its lower end face is set to be positioned apart from left/right upper portions of the adjusting valve  133  by an interference avoidance distance h. At the insertion of the shutoff valve  131  into the cylinder space  108 , while a state in which the adjusting valve  133  is lifted by the interference prevention distance h by supplying power to the lift electromagnet  151  is being kept, the shutoff valve  131  is inserted into the cylinder space  108  and, being timed to the completion of the insertion of the shutoff valve  131 , power supply to the lifting electromagnet  151  is stopped to allow the shutoff valve  133  to drop. At the same time, by applying power to the suction electromagnet  156 , the lower end of the adjusting valve  133  is sucked by stress of the suction electromagnet  156  and the drop of the adjusting valve  133  is facilitated to maintain stable sliding between the lower end face of the adjusting valve  133  and the rotor base surrounding wall  113 . At the time of the returning of the shutoff valve  131  to the outside of the cylinder  101 , by stopping power supply to the suction electromagnet  156  and, at the same time, by applying power to the lifting electromagnet  151  to lift the adjusting valve  133  by the interference prevention distance h, the shutoff valve  131  is returned back to the outside of the cylinder  101 . 
     Therefore, according to the second embodiment, the adjusting valve  133  can be moved up and down relative to a valve body  132  of the shutoff valve  131  by using two electromagnets  151  and  156 . When the shutoff valve  131  is inserted into the cylinder  101  or returned back from the cylinder  101 , by using the lift electromagnet  151 , the adjusting valve  133  is lifted and, at the time of the completion of the insertion, by applying power to the suction electromagnet  156  disposed in the lower portion of the longitudinal valve groove, the adjusting vale  133  is lowered, which causes the lower end face of the adjusting valve  133  and rotor base surrounding wall  113  to be slid smoothly and rapidly. That is, at the time of the insertion or returning of the shutoff valve  131 , the interference between the adjusting valve  133  and rotor base surrounding wall  113  can be removed. 
     Moreover, the method of inserting the shutoff valve  131  into the cylinder  101  shown in  FIGS. 8 and 9  is referred to as so-called “horizontal insertion” method in which the shutoff valve  131  is inserted and drawn in a direction of a radius direction and orthogonal direction of the cylinder  101 . However, the insertion method of the shutoff valve  131  has a variety, for example, the method also includes a method by which an arc-shaped valve is inserted while the valve is rotating. The electromagnet is named for the convenience of explanation and the name has nothing to do with its nature. The switching of currents of the lifting electromagnet  151  and suction electromagnet  156  is performed by the switching point  150 , electronic control, or the like. 
     Third Embodiment 
       FIG. 10  is a partial cross-sectional diagram of a rotary internal combustion engine  604  of the third embodiment of the present invention.  FIG. 11  is a partial cross-sectional diagram showing an improved example of the rotary internal combustion engine. 
     As shown in  FIG. 10 , the rotary internal combustion engine  603  has two shutoff valves  231   a  and  231   b  to be controlled by a valve reciprocating mechanism  261 . Further, in a cylinder  201 , a rotor  210  has two rotor blades  220   a  and  220   b  and all components required to perform one working stroke for every one-half rotation of the rotor  210  are provided in which one working stroke includes operations of the shutoff valve  231   a  and  231   b , jetting nozzles  206   a  and  206   b , ignition plugs  207   a  and  207   b , exhaust holes  242   a  and  242   b , and the like. For every one-half rotation of the rotor  210 , two working strokes are completed. Moreover, compressed mixed air is supplied from a compressed mixed air supply mechanism  247 . 
     As shown in  FIG. 11 , the rotary internal combustion engine  603  is equipped with three shutoff valves  231   a ,  231   b , and  231   c  controlled by a valve reciprocating mechanism  261 . In the cylinder  201 , the rotor  210  has three rotor blades  220   a  to  220   c  and there are all components required to perform one working stroke for every one-third rotation of the rotor  210  in which one working stroke includes operations of the shutoff valve  231   a  to  231   c , jetting nozzles  206   a  and  206   c , ignition plugs  207   a  to  207   c , exhaust holes  242   a  to  242   c  and the like. For every one-third rotation of the rotor  210 , three working strokes are completed. Moreover, the compressed mixed air is supplied from the compressed mixed air supply mechanism  247 . 
     That is, the rotary internal combustion engine  603  of the third embodiment is characterized in that the rotor  210  has X (X=1, 2, . . . ) pieces of the rotor blades and, for every one-Xth rotation of the rotor  210 , one working stroke is completed. Moreover, in the third embodiment of the present invention, an upper portion of the shutoff valve  231  ( 231   a ,  231   b , . . . ) is hermetically held in a horizontal valve groove formed in a cylinder circumferential wall  204  and a lower end face of the shutoff valve  231  ( 231   a ,  231   b , . . . ) is hermetically held in a rotor base surrounding wall  213  to form a sliding face of a rotor base  211  formed integrally with a side rotor base  212 . 
     Working of one stroke is equivalent to working of one cylinder of a reciprocating engine and, therefore, a plurality of working is simultaneously performed in one cylinder contributes to contraction in volume in an internal combustion engine  603 . The internal combustion engine is allowed to design so that working distance is matched to combustion distance depending on a difference in a kind and quality of fuel. 
     As described above, the rotary internal combustion engine  603  of the third embodiment is characterized in that the rotor  210  has X (X=1, 2, 3 . . . ) pieces of the rotor blades ( 220   a ,  220   b , . . . ) and there are all components required to perform one working stroke for every one-half rotation of the rotor  210  in which one working stroke includes operations of the shutoff valve  231   a ,  231   b , . . . , jetting nozzles  206   a ,  206   b , . . . , ignition plugs  207   a ,  207   b , . . . , exhaust holes  242   a ,  242   b , . . . , and the like and, for every one-Xth rotation of the rotor  210 , one working stroke is completed. 
     Therefore, according to the third embodiment, in the cylinder  201 , the rotor  210  has a plurality of the rotor blade  220 . An angle obtained by dividing one rotation angel of the rotor  210 , that is, 360° by the number of the rotor blades  220  is defined as one working angle, at one working angle, working stroke having the same number as the number of the rotor blades  220  is completed. This enables the volume of the cylinder  201  to be effectively used and, as a result, the setting of a working distant being suitable to the combustion distance of fuel. 
     Fourth Embodiment 
       FIG. 12  is a partial cross-sectional view showing a rotary internal combustion engine  604  of the fourth embodiment of the present invention.  FIG. 13  is also a partial cross-sectional view showing, in detail, configurations of components surrounding a sub-combustion chamber  352  of the fourth embodiment. 
     As shown in  FIGS. 12 and 13 , in the rotary internal combustion engine  604 , a working shaft  303  is run concentrically through a cylinder  301  and a rotor  310  is attached to the working shaft  303  in a fixed manner. The rotor  310  includes a rotor base  311  made up of a circular shell and a rotor blade  320  standing in a radial direction of a rotor base surrounding wall  313 . The rotor base  311  and rotor blade  320  are formed integrally. An upper portion of the shutoff valve  331  driven by a valve reciprocating mechanism  361  is hermetically held in a horizontal value groove formed in a cylinder circumferential wall  304  and a lower end face of the shutoff valve  331  is hermetically in contact with a rotor base surrounding wall  13  to form a sliding face of the rotary base  311 . The rotor blade  320  has a base plate  325 . The base plate  325  is provided with side seal plates  322  on its left/right portions and with a top seal plate  323  in its upper portion and with a corner seal plate  324  at a tangential angle portion in the upper portion and with a top seal plate  323  in its upper portion. In a partial portion of the seal plate  323 , a bar called a ski  328  as described in the first embodiment is also provided. 
     In the fourth embodiment, the rotary internal combustion engine  604  has a sub-combustion chamber  351  disposed on an outside of the cylinder  301  in a forth direction of a shutoff valve  331  and two high-pressure air nozzles  352  in a manner to face each other. Further, a fuel nozzle  353  is attached in a manner to face a portion toward which fuel is injected from high-pressure air nozzles  352 . At the time of operations of the rotary internal combustion engine  604 , high-pressure air supplied via the two high-pressure air nozzles  352  from a high-pressure air supplying mechanism  348  is injected. Being timed to the injection, fuel supplied from a fuel supplying mechanism  349  is injected from a fuel nozzle  353 . Air and fuel injected from the three nozzles  352  to  353  are mixed and stirred therein, resulting in natural firing. The jet of a frame reaches cylinder space  308  through a connecting port  354  and is then injected into a combustion chamber  309  formed between the shutoff valve  331  and rotor  310  and the combustion expansion pressure generated therein presses the rotor blade  320  with pressure, with the shutoff valve  331  as a starting point for a mechanical action, to provide the rotation to a working shaft  303 . Then, combustion gas is released to an exhaust hole  342  in an appropriate position existing in a place where the rotation of the rotor  310  almost ends and, for preparation for a next stroke, the shutoff valve  331  is returned back by a valve reciprocating mechanism  361  to the outside of the cylinder  301 , when one working stroke ends. A bridging plate  329  to let the rotor blade  320  smoothly pass through is formed on the exhaust hole  342 . In the present embodiment, water cooling is used and, therefore, a water channel  358  to make cooling water pass through is provided. The reference number  326  is a rib for attaching machinery. 
     As shown above, the rotary internal combustion engine  604  of the fourth embodiment includes a cylinder  301  circumferential wall  304  having a horizontal valve groove in its inner circumferential face, the working shaft  303  concentrically run through the cylinder  301  so as to freely rotate, the rotor  310  having a rotor base  311  made up of a circular shell and the rotor blade  320  standing in a radial direction of a rotor base surrounding wall  313  and being secured to the working shaft  303 , the shutoff valve  331  to perform intermittent movements of insertion and returning between the outside of the cylinder  301  and cylinder space  308 , the sub-combustion chamber  351  disposed outside of the cylinder  301  and in the forth direction of the shutoff valve  331 , two high-pressure air nozzle  352  mounted in the sub-combustion chamber  351  in a manner to face each other, and the fuel nozzle  353  attached so as to face a portion toward which air is injected from the high-pressure air nozzle  352 . In the cylinder space  308  in the cylinder  301 , all portions including both side surfaces of the rotor base  11  and outer edge portions of the rotor blade  20  are hermetically in contact with left and right side internal walls  5  and cylinder circumferential wall  304 . After the completion of insertion of the shutoff valve  331  into the cylinder space  308 , both sides of the shutoff valve  331  are hermetically held into two longitudinal valve grooves formed in left and right side lids and the upper end portion of the shutoff valve  331  is hermetically held to a horizontal valve groove in the cylinder circumferential wall  304  and, further, a lower end face of the shutoff valve  331  is hermetically in contact with the rotor base surrounding wall  313  to form a sliding surface of the rotor base  311  and, in the sub-combustion chamber  351 , gas injected from the two high-pressure air nozzles  352  disposed in a manner to face each other and fuel nozzles  353  is mixed and stirred and then ignited. 
     Therefore, in the fourth embodiment, in the sub-combustion  351 , gas injected by the two high-pressure air nozzles  352  disposed in a manner to face each other and the fuel nozzle  353  is mixed and stirred, resulting in ignition. In the sub-combustion chamber  351 , air and fuel are simultaneously stirred and mixed which ensures combustion. Even in the case of using slow combustion oil, fuel is ignited or fired in the sub-combustion chamber  351  and a jet of flame is injected into a sealed layer in the cylinder  301  and, therefore, kinds of fuel properties that can be used in this rotary internal combustion engine  604  can be widened, for example, to even low combustible oil. 
     Fifth Embodiment 
       FIG. 14  is a partial cross-sectional view of a rotary internal combustion engine  605  of the fifth embodiment of the present invention. As shown in  FIG. 14 , the rotary internal combustion engine  605  is characterized in that, by proper positioning of a working angle suitably corresponding the travel of a rotor  410  relative to a shutoff valve  431  and by providing a plurality of jetting nozzles  406   a  and  406   b  in a manner to face a cylinder space  408  and by injecting, from each of jetting nozzles  406   a  and  406   b , high-pressure air, fuel, and mixed air into a fuel chamber  409  being a sealed layer formed between the shutoff valve  431  and rotor blade  420  at the time of working, the support of combustion can be realized and working force can be enhanced. 
     In the operations of the rotary internal combustion engine  605 , when the rotor blade  420  passes through a position of the shutoff valve  431 , the shutoff valve  431  is immediately inserted by a valve reciprocating mechanism  461  into the cylinder space  408  and the space in a radial direction is shut off. Then, a sealed layer formed between the shutoff valve  431  and rotor blade  420  is used as a combustion chamber  409  and compressed mixed air or compressed air and fuel are injected from the jetting nozzles  406   a  and  406   b  facing the cylinder space  408  and the fuel is ignited or fired in the fuel chamber  409 . The combustion expansion pressure generated by the ignition or firing presses the rotor blade  420  to directly provide rotation to the working shaft  3 , with the shutoff valve  431  as a starting point for a mechanical action. Then, combustion gas is released to an exhaust hole  442  formed in a place where the rotation of the rotor almost ends and, for preparation for next stroke, the shutoff valve  431  is returned back by the valve reciprocating mechanism  461  to the outside of the cylinder  401 , when one working stroke ends. Moreover, on the exhaust hole  442  is formed a bridging plate  429  so that the rotor blade  442  can pass through smoothly. 
     As shown as above, the rotary internal combustion engine  605  of the fifth embodiment of the present invention is characterized in that, the working angle suitably corresponding the travel of the rotor  410  relative to the shutoff valve  431  is properly positioned and a plurality of jetting nozzles  406   a  and  406   b  is provided in a manner to face a cylinder space  408  and, from each of jetting nozzles  406   a  and  406   b , each of high-pressure air, fuel, and mixed air are injected into the fuel chamber  409  being the sealed layer formed between the shutoff valve  431  and rotor blade  420  at the time of working. 
     Therefore, according to the fifth embodiment, by providing a plurality of jetting nozzles  406   a  and  406   b  at a appropriate place where a working angle for the shutoff valve  431  is changed and by additionally injecting air, fuel, or the like from the jetting nozzles  406   a  and  406   b  during one working stroke, movability and combustion force can be enhanced. Secondarily, it is possible to use exhaust gas as secondary fuel. Moreover, in the embodiment, the example is shown in which two jetting nozzles are provided, however, the present invention is not limited to this and more jetting nozzles may be provided. 
     Sixth Embodiment 
       FIGS. 15 and 16  are partial cross-sectional diagrams of the rotary internal combustion engine  606  of the sixth embodiment of the present invention. As shown in  FIGS. 15 and 16 , a working shaft  503  is run concentrically through a cylinder  501  and a rotor  510  is attached to the working shaft  503  in a fixed manner. The rotor  510  is constructed of a rotor base  511  made up of a circular shell and a rotor blade  520  disposed in a direction of a rotor base surrounding wall  513 . The rotor base  511  and rotor blade  520  are formed integrally. The upper portion of the shutoff valve  531  is hermetically held in the horizontal valve groove formed in the cylinder circumferential wall  504  and the lower end face of the shutoff valve  531  is hermetically in contact with the rotor base surrounding wall  513  described above to form a sliding face of the rotor base  511 . The driving of the shutoff valve  531  is controlled by a valve reciprocating mechanism  561 . All components required for performing one working stroke are provided. In the example, on a exhaust hole  542  is formed a bridging plate  529  so that the rotor blade  520  can pass through smoothly. 
     In the rotary internal combustion engine  606  of the sixth embodiment, a lubricating oil required in a rotor  510  and between cylinder inner walls  504  and  505  is supplied by configuring the engine  606  as follows. That is, each of oil transfer holes  551  passing through a shaft center of the working shaft  503  extends from both left/right ends toward its center and, when passing over a line of s cylinder side inner wall  505 , changes an angle in a radial direction. Each of the left/right oil transfer holes  551 , immediately when coming out to surfaces of the shaft, is connected to a oil transfer groove  552  formed on left/right side surfaces of the rotor base  511 . The left/right oil transfer grooves  552  are opened at the rotor base surrounding wall  513  in a position before a base of the rotor blade  520  and are terminated. 
     At the time of working of the rotary internal combustion engine  606 , the lubricating oil fed from a oil supplying pump  550  when entering an oil transfer groove  552  lubricates both sides of the rotor base  511  and when going out from the oil transfer groove  552  also lubricates seal plates  522  to  524  attached on left/right sides of the rotor blade  520  by centrifugal force of rotation of the rotor  510 . Excessive lubricating oil stays in a bottom of the cylinder circumferential wall  503  to provide lubrication to the seal plates  523  to  524  on a top surface of the rotor blade  520 . The excessive lubricating oil drops, due to sweeping by the rotor  510 , into an oil collecting groove  553  formed in the cylinder circumferential wall  504  and, further, enters an oil collecting hole  554  and is circulated for reuse. The excessive lubricating oil after being circulated is collected by an oil collecting mechanism  557 . 
     As described above, the rotary internal combustion engine  606  of the sixth embodiment includes the oil transfer hole  551  and oil transfer groove  552  configured to transfer the lubricating oil fed from the oil supply pump  550 , the oil collecting groove  553  to collect the excessive lubricating oil and the oil collecting hole  554  to let the collected oil be circulated for reuse. The oil transfer holes  551  passes through a shaft center of the working shaft  503  and extends from both left/right ends toward a center and, when passing over a line of s cylinder side inner wall  505 , changes an angle in a radial direction and the left/right oil transfer holes  551 , immediately after coming out to surfaces of the shaft, is connected to the oil transfer groove  552  formed on left/right side surfaces of the rotor base  511  and the left/right oil transfer grooves  552  are opened at the rotor base surrounding wall  513  in a position before a base of the rotor blade  520  and is then terminated. At the time of working of the rotary internal combustion engine  606 , the lubricating oil fed from the oil supplying pump  550 , when entering the oil transfer groove  552 , lubricates both sides of the rotor base  511  and, when going out from the oil transfer groove  552 , also lubricates left/right sides of the rotor blade  520  by centrifugal force of rotation of the rotor  510  and excessive lubricating oil stays in a bottom of the cylinder circumferential wall  504  to provide lubrication to the top surface of the rotor blade  520  and the excessive lubricating oil drops, due to sweeping by the rotor  510 , into the oil collecting groove  553  formed in the cylinder circumferential wall  504  and further enters the oil collecting hole  554  and is circulated for reuse and the excessive lubricating oil after being circulated is collected by an oil collecting mechanism  557 . 
     Therefore, according to the sixth embodiment, when a lubricating oil is supplied between the internal walls  504  and  505  of the cylinder  501  being contact with an outer edge of the rotor  510 , the oil transfer hole  551  having been run through the working shaft  503  is guided in a radial direction and enters the oil transfer groove  552  to lubricate both sides of the rotor  510  and, further, the lubricating oil flown away from the oil transfer groove  552  by centrifugal force of the rotating rotor  510  also lubricate an outer edge of the rotor  510 , that is, a rotor seal and its contact wall. Excessive lubricating oil enters the oil collecting groove  553  and is circulated for reuse and, therefore, the lubricating oil is supplied to an entire portions, in a manner to eliminate waste. Moreover, the lubricating means of the lubricating oil shown in the sixth embodiment is one of examples and other various methods of lubricating may be used in the construction of the rotary internal combustion engine. 
     INDUSTRIAL APPLICABILITY 
     The rotary internal combustion engine described in each of the above embodiments has a shape so as to use a variety of kinds of fuel such as gasoline, light oil, natural gas, organic brewing fuel, heavy oil, or hydrogen gas. The internal combustion engine of the invention has big and flexible capabilities to respond to a large or small scale.