JP2020033975A - Starter of rotation piston-type engine - Google Patents

Abstract

To control the rotation of a plurality of pistons which rotationally slide in a housing so as to bring about a prescribed combustion state.SOLUTION: A control device performs processing which includes: a step (S102) for acquiring a rotation position of a first piston member, and a rotation position of a second piston member when there arises a start command (YES in S100); a step (S104) for specifying a preceding MG and a succeeding MG; a step (S106) for acquiring displacement amounts A, B with a start initial position; a step (S110) for performing compression control by the succeeding MG when the displacement amount A is smaller than a threshold A(0), and the displacement amount B is smaller than a threshold B(0) (YES in S108); and a step (S114) for performing continuous operation control when ignited (YES in S112).SELECTED DRAWING: Figure 7

Description

  The present invention relates to a starting device for a rotary piston type engine.

  2. Description of the Related Art As a conventional rotary piston type engine, for example, Japanese Patent Application Laid-Open No. 2001-241303 (Patent Document 1) discloses a plurality of pistons that slide inside a cylindrical housing around a central axis of the housing as a rotation center. There is disclosed a configuration in which an output shaft is rotated by burning fuel in a combustion chamber provided and formed by an inner peripheral surface of a housing and a plurality of pistons rotatably sliding in the housing.

JP 2001-241303 A

  At the time of starting the above-described rotary piston type engine, for example, the starter motor is used to rotate a plurality of pistons at a constant rotation speed (for example, 200 rpm to 300 rpm) about 5 to 10 times to thereby start the combustion chamber. It is conceivable to make the ignition possible. However, in order to make the combustion chamber ignitable, it is necessary to rotate the plurality of pistons at a certain rotation speed or more, so that the plurality of pistons are rotated at a certain rotation speed or more from the start of operation of the starter motor. May take some time to complete. As a result, when the engine is started, there may be a case where the predetermined combustion state cannot be quickly achieved.

  The present invention has been made to solve the above-described problem, and has as its object to control the rotation of a plurality of pistons that rotate and slide in a housing so that a predetermined combustion state is achieved at the time of starting. To provide a starting device for a rotating piston type engine.

  A starting device for a rotary piston engine according to an aspect of the present invention includes a housing, a first piston member rotatably supported in the housing, and a second piston member rotatably supported in the housing. A starting device for a rotary piston engine in which a combustion chamber for burning fuel is formed by an inner peripheral surface of a housing, a first piston member, and a second piston member. The starting device is connected to a first piston member and a second piston member, and generates one or more rotating electric machines that generate power by functioning as an electric motor and generate electric power by functioning as a generator; And a control device for controlling the When a start of the engine is required, the control device causes the rotating electric machine to function as an electric motor, and performs a start control of bringing the first piston member and the second piston member close to each other to compress the gas in the combustion chamber.

  With this configuration, when the engine needs to be started, the first piston member and the second piston member are brought close to each other to compress the gas in the combustion chamber, thereby igniting the first piston member and the second piston member. Either the member or the second piston member can be rotated. Therefore, it is possible to control the rotation of the plurality of pistons that slide and rotate in the housing so that the engine enters a predetermined combustion state.

  Preferably, the control device controls the rotating electric machine such that when the engine is required to start, the first piston member and the second piston member approach each other at a speed at which ignition is possible.

  In this case, the fuel in the combustion chamber can be ignited by bringing the first piston member and the second piston member close to each other and compressing the gas in the combustion chamber. Therefore, one of the first piston member and the second piston member can be rotated by burning the fuel. In particular, if the moving speed of the piston is slow, the gas in the combustion chamber leaks from the seal portion of the piston, etc., so that it cannot be ignited because it is not sufficiently compressed. it can. "The speed at which the ignition becomes possible" means the latter side.

  More preferably, the control device ignites the fuel in the combustion chamber at the first or several compressions when the engine is required to be started.

  With this configuration, the fuel in the combustion chamber is ignited at the time of the first or several compressions, so that either the first piston member or the second piston member can be rotated by burning the fuel. Therefore, a predetermined combustion state can be quickly achieved when the engine is started.

  More preferably, when starting of the engine is required, the control device controls the rotating electric machine such that the first piston member is at a first position, which is an initial starting position, before performing start control. , The rotating electric machine is controlled such that the second piston member is at the second position, which is the initial starting position.

  In this way, when starting of the engine is required, the first piston member and the second piston member can be set to the first position and the second position, respectively. Therefore, it is possible to control the rotation of the plurality of pistons that rotate and slide in the housing so that the engine is brought into a predetermined combustion state when the engine is started.

  More preferably, the control device controls the rotary electric machine such that the first piston member is at a first position, which is an initial starting position, when the engine is stopped, and the second piston member is at a second position, which is an initial starting position. The rotating electric machine is controlled to be at the position of.

  With this configuration, when the engine is stopped, the first piston member and the second piston member can be set to the first position and the second position, respectively. Therefore, it is possible to control the rotation of the plurality of pistons that rotate and slide in the housing so that the engine is brought into a predetermined combustion state when the engine is started.

  More preferably, the control device separates one of the first piston member and the second piston member from the other during the execution of the start control, when the rotation state of one of the first piston member and the second piston member is a collision state with the other. Rotate in the direction.

  With this configuration, it is possible to avoid collision between the first piston member and the second piston member.

  More preferably, the control device determines whether the fuel has been ignited in the combustion chamber during the execution of the start control, and when it is determined that the fuel has not been ignited in the combustion chamber, the first piston member and The second piston member is brought closer to fire.

  With this configuration, when it is determined that the fuel is not ignited in the combustion chamber during the execution of the start control, the first piston member and the second piston member are brought closer to each other and compressed, so that the ignition is reliably performed. Can be.

  More preferably, the control device controls the generated electric power of the rotating electric machine when at least one of the first piston member and the second piston member rotates with the operation of the engine.

  With this configuration, when at least one of the first piston member and the second piston member rotates, power can be generated using the rotating electric machine.

  According to the present invention, it is possible to provide a starting device for a rotary piston type engine that controls the rotation of a plurality of pistons that rotate and slide in the housing so that a predetermined combustion state is obtained at the time of starting.

It is a figure showing an example of a schematic structure of a power generation system in this embodiment. It is a perspective view showing a part of composition of a power generation system. It is a figure showing an example of the composition of the piston member provided in the engine. It is a figure for explaining an example of operation of each component when fuel burns in combustion chamber A. It is a figure for explaining an example of operation of each component when fuel burns in combustion chamber D. It is a figure for explaining an example of a change of a stroke in each combustion chamber. 5 is a flowchart illustrating an example of a process executed by the control device. FIG. 4 is a diagram for explaining an example of a positional relationship between a first piston member and a second piston member when the engine is started. FIG. 7 is a diagram for explaining an example of an operation of a first piston member at the time of starting the engine. It is a figure for explaining an example of operation of the 2nd piston member at the time of ignition. It is a figure for explaining an example of operation of a control device when a rotation position of the 1st piston member at the time of ignition shifts. 9 is a flowchart illustrating an example of a process performed by a control device according to a first modification. 13 is a flowchart illustrating an example of a process performed by a control device according to a second modification. 13 is a flowchart illustrating an example of a process performed by a control device according to a third modification. It is a figure showing an example of composition of a piston member in a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are the same. Therefore, detailed description thereof will not be repeated.

<About the schematic configuration of the power generation system 1>
Hereinafter, the configuration and operation of the power generation system using the rotating piston type engine according to the present embodiment will be described. FIG. 1 is a diagram illustrating an example of a schematic configuration of a power generation system 1 according to the present embodiment. FIG. 2 is a perspective view showing a part of the configuration of the power generation system 1. As shown in FIGS. 1 and 2, the power generation system 1 includes a rotary piston type engine (hereinafter simply referred to as an engine) 2, a first MG (Motor Generator) 61, a second MG (Motor Generator) 62, It includes a first inverter 71, a second inverter 72, a battery 80, a load 90, a first resolver 101, a second resolver 102, and a control device 200.

<About the configuration of the engine 2>
In the present embodiment, the engine 2 is a rotary piston type internal combustion engine. As fuel for the engine 2, for example, gas, gasoline, light oil, or the like is used. The engine 2 includes a housing 4, an intake pipe 6, an exhaust pipe 8, an injector 10, a throttle valve 12, a throttle motor 14, a first output shaft 16, and a second output shaft 18.

  One end of the intake pipe 6 is connected to an intake port (not shown) of the housing 4. An air cleaner (not shown) is connected to the other end of the intake pipe 6, for example. The air cleaner removes foreign matters from air taken in from outside the engine 2. During the operation of the engine 2, the air sucked from the air cleaner flows through the intake pipe 6. The air flowing through the intake pipe 6 flows through the intake port of the housing 4.

  The throttle valve 12 is provided in the intake pipe 6 and limits a flow rate of air flowing through the intake pipe 6. The opening of the throttle valve 12 (throttle opening) is adjusted by a throttle motor 14 that operates according to a control signal TH from the control device 200.

  The injector 10 is provided upstream of the throttle valve 12 of the intake pipe 6, and injects fuel (for example, gas) into the intake pipe 6 according to a control signal INJ from the control device 200. The injected fuel is mixed with air in the intake pipe 6 and flows to the intake port of the housing 4.

  The outer peripheral portion of the housing 4 is formed in a cylindrical shape as shown in FIG. 2, and the inner peripheral portion is also formed in a cylindrical shape. The housing 4 houses therein a first piston member connected to the first output shaft 16 and a second piston member connected to the second output shaft 18.

  One end of the exhaust pipe 8 is connected to an exhaust port (not shown) of the housing 4. An exhaust processing device (not shown) is connected to the other end of the exhaust pipe 8, for example. During operation of the engine 2, exhaust gas generated by combustion in the housing 4 flows from an exhaust port of the housing 4 to an exhaust pipe 8. The exhaust gas flowing through the exhaust pipe is purified by the exhaust treatment device and discharged to the outside of the engine 2.

<About the internal structure of the engine 2>
Hereinafter, an example of the internal structure of the engine 2 will be described with reference to FIG. FIG. 3 is a diagram illustrating an example of a configuration of a piston member provided inside the engine.

  As shown in FIG. 3, the first piston member 24 and the second piston member 28 are housed in the housing 4 in combination. The first piston member 24 includes a first rotating body 24a and a first wall member 24b. The second piston member 28 includes a second rotating body 28a and a second wall member 28b. The first wall member 24b and the second wall member 28b correspond to “piston pieces”.

  The first rotator 24a and the second rotator 28a are rotatably supported by the housing 4 so that the rotation centers coincide with each other, and one end face of the first rotator 24a and one of the second rotators 28a are provided. It is provided so that an end surface may face.

  The first rotator 24a and the second rotator 28a are formed to have a slope portion in a cross section including the rotation center. Accordingly, in a state where the first rotator 24a and the second rotator 28a are combined, a concave portion having a V-shaped cross section is formed between the first rotator 24a and the second rotator 28a in the circumferential direction. Formed.

  The first rotating body 24 a is provided to extend from the center of rotation toward the inner peripheral surface of the housing 4, and has a first wall member 24 b having an end contacting the inner peripheral surface of the housing 4. The first wall member 24b is configured by two triangular plate members. The two triangular plate members of the first wall member 24b are provided on the first rotating body 24a so as to be symmetrical with respect to the center of rotation.

  The second rotating body 28a is provided with a second wall member 28b that extends from the center of rotation toward the inner peripheral surface of the housing 4 and has an end abutting on the inner peripheral surface of the housing 4. The second wall member 28b is constituted by two triangular plate members having the same shape as the plate member constituting the first wall member 24b. The two triangular plate-shaped members of the second wall member 28b are provided on the second rotating body 28a so as to be symmetrical with respect to the center of rotation.

  Each of the triangular plate-like members of the first wall member 24b and the second wall member 28b has a first rotating body 24a and a second rotating member 24a in a state where the first piston member 24 and the second piston member 28 are housed in the housing 4. It is formed so as to conform to the triangular cross-sectional shape formed by the recess between the two rotating bodies 28a and the inner peripheral surface of the housing 4. The outer peripheral portions of the triangular plate members of the first wall member 24b and the second wall member 28b are configured to be slidable on the inner peripheral surface of the housing 4.

  A seal or the like is appropriately provided at a contact portion or a sliding portion between the members. The first output shaft 16 is connected to the first rotating body 24a such that the rotation centers coincide with each other. The second output shaft 18 is connected to the second rotating body 28a such that the rotation centers coincide with each other. Further, for example, one-way clutches 22 and 26 are provided between the housing 4 and each of the first rotating body 24a and the second rotating body 28a. The one-way clutch 22 permits rotation only in a predetermined rotation direction within the housing 4 of the first rotating body 24a, and suppresses rotation in a direction opposite to the predetermined rotation direction. Similarly, the one-way clutch 26 permits rotation only in a predetermined rotation direction in the housing 4 of the second rotating body 28a, and suppresses rotation in a direction opposite to the predetermined rotation direction.

<About the configuration other than the engine 2>
Returning to FIGS. 1 and 2, the configuration of the power generation system 1 other than the engine 2 will be described below.

  Both the first output shaft 16 and the second output shaft 18 rotate due to the combustion of fuel in the housing 4. First output shaft 16 is connected to a rotation shaft of first MG 61. Second output shaft 18 is connected to a rotation shaft of second MG 62. Further, the first output shaft 16 is rotatable by the torque of the first MG 61, and the second output shaft 18 is rotatable by the drive torque of the second MG 62.

  Each of first MG 61 and second MG 62 is a rotating electric machine that generates power by functioning as a motor and generates power by functioning as a generator. In the present embodiment, each of first MG 61 and second MG 62 is, for example, a three-phase AC rotating electric machine. Each of the first inverter 71 and the second inverter 72 is a power converter configured to be capable of converting power between DC power and AC power.

  First MG 61 is electrically connected to first inverter 71. The first inverter 71 is controlled by a control signal INV1 from the control device 200. That is, the power transmitted and received between first MG 61 and first inverter 71 is controlled by control signal INV 1 from control device 200.

  Control device 200 controls first inverter 71 such that regenerative torque is generated in first MG 61, for example. At this time, the regenerative power generated in first MG 61 is converted from AC power to DC power in first inverter 71 and supplied to battery 80. Battery 80 is charged by DC power supplied from first inverter 71. Alternatively, control device 200 controls first inverter 71 such that drive torque is generated in first MG 61. At this time, the power of battery 80 is converted from DC power to AC power in first inverter 71 and supplied to first MG 61.

  Second MG 62 is electrically connected to second inverter 72. The second inverter 72 is controlled by a control signal INV2 from the control device 200. That is, the power transmitted and received between second MG 62 and second inverter 72 is controlled by control signal INV 2 from control device 200.

  Control device 200 controls second inverter 72 such that regenerative torque is generated in second MG 62, for example. At this time, the regenerative power generated in second MG 62 is converted from AC power to DC power in second inverter 72 and supplied to battery 80. Battery 80 is charged by DC power supplied from second inverter 72. Alternatively, control device 200 controls second inverter 72 such that drive torque is generated in second MG 62. At this time, the power of battery 80 is converted from DC power to AC power in second inverter 72 and supplied to second MG 62.

  The battery 80 is a DC power supply constituted by a secondary battery such as a nickel-metal hydride battery or a lithium-ion battery, for example. The battery 80 may be any power storage device that can store the DC power supplied from the first inverter 71 or the second inverter 72. For example, a capacitor or the like may be used instead of the battery 80.

  The operation of the power generation system 1 is controlled by the control device 200. The control device 200 includes a CPU (Central Processing Unit) that performs various types of processing, a memory including a ROM (Read Only Memory) that stores programs and data, and a RAM (Random Access Memory) that stores processing results of the CPU and the like. An input / output port (both not shown) for exchanging information with the outside is included. The above-mentioned sensors (for example, the first resolver 101 and the second resolver 102) are connected to the input port. Devices to be controlled (for example, the engine 2, the first inverter 71, the second inverter 72, etc.) are connected to the output port.

  Control device 200 controls various devices such that power generation system 1 is brought into a desired operation state based on signals from the sensors and devices, and maps and programs stored in a memory. Note that the various controls are not limited to processing by software, but can be processed by dedicated hardware (electronic circuit).

  First resolver 101 detects a rotation angle of a rotation shaft (first output shaft 16) of first MG 61 (hereinafter, referred to as rotation angle CA1). The first resolver 101 transmits a signal indicating the detected rotation angle CA1 to the control device 200.

  Second resolver 102 detects a rotation angle of a rotation shaft (second output shaft 18) of second MG 62 (hereinafter, referred to as rotation angle CA2). The second resolver 102 transmits a signal indicating the detected rotation angle CA2 to the control device 200.

<Operation of power generation system 1>
The operation of the power generation system 1 having the above configuration will be described with reference to FIGS.

  FIG. 4 is a diagram for explaining an example of the operation of each component when fuel is burned in the combustion chamber A. FIG. 5 is a diagram for explaining an example of the operation of each component when fuel is burned in the combustion chamber D.

  FIG. 4 shows a cross section of a central portion of the housing 4 (for example, a contact portion between the first rotating body 24a and the second rotating body 28a). As shown in FIG. 4, four combustion chambers A to D are formed in the housing 4 by the inner peripheral surface of the housing 4, the first piston member 24, and the second piston member 28. In FIG. 4, the one-way clutches 22 and 26 suppress the counterclockwise rotation of the first piston member 24 and the second piston member 28 and allow the clockwise rotation.

  In the combustion chamber A shown in FIG. 4, an expansion process is performed in which a mixture of compressed air and fuel is ignited by self-ignition. That is, when the fuel is burned in the combustion chamber A, the counterclockwise movement of the first piston member 24 is suppressed by the one-way clutch 22, so that the rotational position of the first piston member 24 is maintained while the second piston member 28 is maintained. Only the cylinder rotates in the direction of the dashed arrow, and the volume of the combustion chamber A increases as the gas in the combustion chamber A expands.

  In the combustion chamber B shown in FIG. 4, the expanded exhaust gas is discharged from the exhaust pipe 8 in an exhaust stroke. That is, when the second piston member 28 rotates in the direction of the dashed arrow due to the combustion of fuel in the combustion chamber A, the rotation position of the first piston member 24 is maintained, and the volume of the combustion chamber B decreases. At this time, the combustion chamber B is in communication with the exhaust pipe 8. Therefore, the exhaust gas in the combustion chamber B is discharged to the exhaust pipe 8 as the volume of the combustion chamber B decreases.

  In the combustion chamber C shown in FIG. 4, an intake stroke in which a mixture of air and fuel is sucked from the intake pipe 6. That is, when the second piston member 28 rotates in the direction of the dashed arrow due to the combustion of the fuel in the combustion chamber A, the rotation position of the first piston member 24 is maintained, and the volume of the combustion chamber C increases. At this time, the combustion chamber C communicates with the intake pipe 6 while the second piston member 28 rotates in the direction of the dashed arrow. Therefore, the air-fuel mixture is drawn into the combustion chamber C from the intake pipe 6 as the volume of the combustion chamber C increases.

  In the combustion chamber D shown in FIG. 4, the air-fuel mixture sucked from the intake pipe 6 is compressed. That is, when the second piston member 28 rotates in the direction of the dashed arrow due to the combustion of fuel in the combustion chamber A, the rotation position of the first piston member 24 is maintained, and the volume of the combustion chamber D decreases. At this time, since the combustion chamber D does not communicate with either the intake pipe 6 or the exhaust pipe 8, the mixture in the combustion chamber D is compressed due to the decrease in the volume of the combustion chamber D.

  Then, when a clockwise force acts on the first piston member 24 due to an increase in the pressure in the combustion chamber D, the first piston member 24 rotates, and the position of the first piston member 24 and the second piston member 28 is changed. The relationship is the positional relationship shown in FIG.

  FIG. 5 shows a cross section of the central portion of the housing 4 as in FIG. The configuration of the engine 2 shown in FIG. 5 is different from the configuration of the engine 2 shown in FIG. 4 in the positional relationship between the first piston member 24 and the second piston member 28 and the positions and volumes of the combustion chambers A to D. Is the same except for the difference.

  In the combustion chamber D shown in FIG. 5, the expansion stroke follows the compression stroke. That is, in the combustion chamber D, the mixture of the compressed air and the fuel is ignited by self-ignition. When the fuel is burned in the combustion chamber D, the counterclockwise movement of the second piston member 28 is suppressed by the one-way clutch 26, so that only the first piston member 24 is maintained while the rotational position of the second piston member 28 is maintained. It rotates clockwise, and the volume of the combustion chamber D increases as the gas in the combustion chamber D expands.

  In the combustion chamber A shown in FIG. 5, the exhaust stroke follows the expansion stroke. That is, when the first piston member 24 rotates clockwise due to the combustion of the fuel in the combustion chamber D, the rotational position of the second piston member 28 is maintained, and the volume of the combustion chamber A decreases. At this time, the combustion chamber A is in communication with the exhaust pipe 8. Therefore, the exhaust gas in the combustion chamber A is discharged to the exhaust pipe 8 as the volume of the combustion chamber A decreases.

  In the combustion chamber B shown in FIG. 5, the intake stroke follows the exhaust stroke. That is, when the first piston member 24 rotates clockwise due to the combustion of fuel in the combustion chamber D, the rotational position of the second piston member 28 is maintained, and the volume of the combustion chamber B increases. At this time, the combustion chamber B communicates with the intake pipe 6 while the first piston member 24 is rotating. Therefore, the air-fuel mixture is sucked into the combustion chamber B from the intake pipe 6 as the volume of the combustion chamber B increases.

  In the combustion chamber C shown in FIG. 5, the compression stroke is performed after the intake stroke. That is, when the first piston member 24 rotates clockwise due to the combustion of the fuel in the combustion chamber D, the rotational position of the second piston member 28 is maintained, and the volume of the combustion chamber C decreases. At this time, since the combustion chamber C is not in communication with either the intake pipe 6 or the exhaust pipe 8, the mixture in the combustion chamber C is compressed by the reduction in the volume of the combustion chamber C.

  When the pressure in the combustion chamber C rises and a clockwise force acts on the second piston member 28, the second piston member 28 rotates, and the position of the first piston member 24 and the second piston member 28 is changed. The relationship becomes the positional relationship shown in FIG.

  In this way, every time combustion is performed in any of the combustion chambers A to D, the first piston member 24 and the second piston member 28 rotate alternately, so that the engine 2 operates. In this case, as shown in FIG. 4, when the fuel is burned in the combustion chamber A or the combustion chamber C, the rotation of the second piston member 28 while the second piston member 28 rotates to a predetermined rotation position. Is generated in the second MG 62 by generating regenerative torque for braking the motor. Similarly, as shown in FIG. 5, when fuel burns in the combustion chamber B or the combustion chamber D, the rotation of the first piston member 24 is stopped while the first piston member 24 rotates to a predetermined rotation position. Electric power is generated by generating regenerative torque for braking in the first MG 61.

  That is, the first piston member 24 and the second piston member 28 rotate alternately to generate power in the first MG 61 and the second MG 62, and the generated AC power is converted to DC power in the first inverter 71 and the second inverter 72. It is converted and supplied to the battery 80.

  FIG. 6 is a diagram for explaining an example of a change in the stroke in each combustion chamber. As shown in FIG. 6, for example, in the stroke (1), the combustion chamber A becomes an expansion stroke, the combustion chamber B becomes an exhaust stroke, the combustion chamber C becomes an intake stroke, and the combustion chamber D becomes a compression stroke. The positional relationship between the first piston member 24 and the second piston member 28 is as shown in FIG. Therefore, in the stroke (1), the second piston member 28 rotates by the combustion in the combustion chamber A, and a regenerative torque is generated in the second MG 62.

  In the stroke (2), the combustion chamber A becomes an exhaust stroke, the combustion chamber B becomes an intake stroke, the combustion chamber C becomes a compression stroke, and the combustion chamber D becomes an expansion stroke. The positional relationship between the first piston member 24 and the second piston member 28 is as shown in FIG. Therefore, in the stroke (2), the first piston member 24 is rotated by the combustion in the combustion chamber D, and the regenerative torque is generated in the first MG 61.

  In the stroke (3), the combustion chamber A becomes the intake stroke, the combustion chamber B becomes the compression stroke, the combustion chamber C becomes the expansion stroke, and the combustion chamber D becomes the exhaust stroke. The positional relationship between the first piston member 24 and the second piston member 28 is as shown in FIG. Therefore, in the stroke (3), the second piston member 28 is rotated by combustion in the combustion chamber C, and a regenerative torque is generated in the second MG 62.

  In the stroke (4), the combustion chamber A becomes a compression stroke, the combustion chamber B becomes an expansion stroke, the combustion chamber C becomes an exhaust stroke, and the combustion chamber D becomes an intake stroke. The positional relationship between the first piston member 24 and the second piston member 28 is as shown in FIG. Therefore, in the stroke (4), the first piston member 24 is rotated by the combustion in the combustion chamber B, and a regenerative torque is generated in the first MG 61.

  Thereafter, as long as the operation of the engine 2 continues, the operations of the strokes (1) to (4) are repeatedly performed.

  When the engine 2 included in the power generation system 1 having such a configuration is started, for example, it is conceivable that the combustion chamber is made ignitable by rotating a plurality of pistons using a starter motor. However, in order to make the combustion chamber ignitable, it is necessary to rotate the plurality of pistons at a certain rotation speed or more, so that the plurality of pistons are rotated at a certain rotation speed or more from the start of operation of the starter motor. May take some time to complete. As a result, when the engine is started, there may be a case where the predetermined combustion state cannot be quickly achieved.

  Therefore, in the present embodiment, when starting of engine 2 is required, control device 200 causes first MG 61 or second MG 62 to function as an electric motor, and brings first piston member 24 and second piston member 28 closer to each other. Thus, start control for compressing the gas in the combustion chamber is performed.

  With this configuration, when the engine needs to be started, the first piston member 24 and the second piston member 28 are brought close to each other to compress the gas in the combustion chamber, thereby igniting the fuel. One of the first piston member 24 and the second piston member 28 can be rotated. Therefore, the rotation of the first piston member 24 and the second piston member 28 that rotate and slide in the housing 4 can be controlled so that the engine 2 enters a predetermined combustion state. In the present embodiment, the first MG 61, the second MG 62, and the control device 200 implement a starting device for the engine 2.

  Hereinafter, a control process executed by control device 200 in the present embodiment will be described with reference to FIG. FIG. 7 is a flowchart illustrating an example of a process performed by the control device 200. The process shown in this flowchart is called from a main routine (not shown) and executed at predetermined control cycles. The same applies to the processing shown in other flowcharts described later.

  In step (hereinafter, step is described as S) 100, control device 200 determines whether or not there is a command to start engine 2. Control device 200 detects, for example, that engine 2 is in a stopped state and that a start operation of engine 2 (for example, pressing a start button) by a user is performed using a sensor, a switch, or the like. In this case, it is determined that there is a start command. If it is determined that there is a start command (YES in S100), the process proceeds to S102.

  In S102, control device 200 acquires the rotational position of first piston member 24 and the rotational position of second piston member 28. The control device 200 acquires the rotation position of the first piston member 24 using the detection result of the first resolver 101 and acquires the rotation position of the second piston member 28 using the detection result of the second resolver 102, for example. I do.

  In S104, control device 200 specifies the preceding MG and the following MG. The preceding MG is an MG that is connected to the piston member on the rotation direction side in the combustion chamber in which fuel burns first among the four combustion chambers when the engine 2 is started. The trailing MG is an MG connected to a piston member on the opposite side to the rotation direction in a combustion chamber in which fuel first burns out of the four combustion chambers when the engine 2 is started.

  FIG. 8 is a view for explaining an example of the positional relationship between the first piston member 24 and the second piston member 28 when the engine 2 is started.

  For example, when the rotational position of the first piston member 24 and the rotational position of the second piston member 28 as shown in FIG. 8 are acquired, the second MG 62 is specified as the preceding MG, and the first MG 61 is determined as the trailing MG. Specified.

  Returning to FIG. 7, in S106, control device 200 determines the magnitude of the difference between the actual rotational position of first piston member 24 and the initial starting position of first piston member 24 (hereinafter, referred to as deviation amount A). To get). Similarly, control device 200 obtains the magnitude of the difference between the actual rotational position of second piston member 28 and the initial starting position of second piston member 28 (hereinafter, referred to as deviation B).

  When the second MG 62 is specified as the preceding MG and the first MG 61 is specified as the trailing MG, the initial starting position of the first piston member 24 and the initial starting position of the second piston member 28 are respectively shown in FIG. The rotation position of the first piston member 24 and the rotation position of the second piston member 28 are shown.

  When the first MG 61 is specified as the preceding MG and the second MG 62 is specified as the trailing MG, the initial starting position of the first piston member 24 and the initial starting position of the second piston member 28 are respectively shown in FIG. The rotation position of the second piston member 28 and the rotation position of the first piston member 24 are determined. The initial start position of the first piston member 24 and the initial start position of the second piston member 28 are, for example, such that when the engine 2 starts, the combustion chamber in which fuel first burns out of the four combustion chambers does not communicate with the intake pipe 6. It is set as follows.

  In S108, control device 200 determines whether deviation amount A is smaller than threshold value A (0) and deviation amount B is smaller than threshold value B (0). Note that threshold value A (0) may be the same value as threshold value B (0) or may be a different value. The threshold value A (0) and the threshold value B (0) are, for example, a rotational position where the rotational position of the first piston member 24 and a rotational position of the second piston member 28 do not affect the startability of the engine 2. It is a value for determining that the condition is true, and is a predetermined value. The rotational position that does not affect the startability of the engine 2 is, for example, a rotational position in which a combustion chamber in which fuel first burns when the engine 2 is started does not communicate with the intake pipe 6. If it is determined that deviation amount A is smaller than threshold value A (0) and deviation amount B is smaller than threshold value B (0) (YES in S108), the process proceeds to S110.

  In S110, control device 200 executes compression control by the trailing MG. Specifically, control device 200 executes, as compression control, control for rotating MG specified as the trailing MG at a predetermined rotation speed. The rotation speed at the time of executing the compression control of the MG specified as the trailing MG will be described as being the upper limit rotation speed. However, the rotation speed may be any rotation speed at which compression can be performed until ignition is possible. It is not limited to speed.

  In S112, control device 200 determines whether or not ignition has occurred in the combustion chamber. Control device 200 determines that ignition has occurred in the combustion chamber, for example, when the rotation speed of the piston member connected to the preceding MG exceeds a threshold value. The control device 200 can acquire the rotation speed of the piston member connected to the preceding MG using, for example, the first resolver 101 or the second resolver 102. If it is determined that ignition has occurred in the combustion chamber (YES in S112), the process proceeds to S114.

  At S114, control device 200 executes the continuous operation control. Specifically, control device 200 operates engine 2, first MG 61 and second MG 62 by repeating steps (1) to (4) in combustion chambers A to D, as described with reference to FIG. .

  If displacement A is greater than or equal to threshold value A (0), or if displacement B is greater than or equal to threshold value B (0) (NO in S108), the process proceeds to S116.

  In S116, control device 200 determines whether or not the rotational position of at least one of first piston member 24 and second piston member 28 can be corrected.

  For example, when the actual rotation position of the first piston member 24 is deviated in a direction opposite to a predetermined rotation direction rotatable by the one-way clutch 22 with respect to the starting initial position, the control device 200 It is determined that the rotational position of one piston member 24 can be corrected.

  Similarly, the control device 200 determines, for example, when the actual rotational position of the second piston member 28 is deviated from the initial start position in a direction opposite to a predetermined rotational direction that can be rotated by the one-way clutch 26. Determines that the rotational position of the second piston member 28 can be corrected.

  If it is determined that the rotational position of at least one of the first piston member 24 and the second piston member 28 can be corrected (YES in S116), the process proceeds to S118. On the other hand, when it is determined that the rotational positions of both first piston member 24 and second piston member cannot be corrected (NO in S116), the process proceeds to S110.

  In S118, control device 200 corrects the rotational position. For example, when it is determined that shift amount A is equal to or greater than threshold value A (0) and that the rotational position of first piston member 24 can be corrected, control device 200 determines whether the first piston The first MG 61 is controlled such that the member 24 is at the starting initial position. Further, for example, when it is determined that displacement amount B is equal to or greater than threshold value B (0) and that the rotational position of second piston member 28 can be corrected, The second MG 62 is controlled such that the two-piston member 28 is at the starting initial position.

  In S120, control device 200 acquires deviation amounts A and B. The acquisition method is as described in S106 above, and thus the detailed description thereof will not be repeated. Control device 200 then returns the process to S108.

  If it is determined in S112 that ignition has not occurred (NO in S112), the process proceeds to S122. In S122, control device 200 continues the compression control, and returns the process to S112.

  The operation of the control device 200 based on the above structure and flowchart will be described with reference to FIGS.

  FIG. 9 is a view for explaining an example of the operation of the first piston member 24 when the engine 2 is started. FIG. 10 is a diagram for explaining an example of the operation of the second piston member 28 at the time of ignition. FIG. 11 is a diagram for explaining an example of the operation of the control device 200 when the rotational position of the first piston member 24 shifts at the time of ignition.

<When the first piston member 24 and the second piston member 28 are at the starting initial position>
For example, as shown in FIG. 8, it is assumed that the rotational position of the first piston member 24 and the rotational position of the second piston member 28 are initial starting positions.

  If the user performs a start operation (YES in S100), the rotational position of first piston member 24 and the rotational position of second piston member 28 are acquired (S102), and second MG 62 is specified as the preceding MG, and The first MG 61 is specified as the trailing MG (S104).

  The deviation amounts A and B between the first piston member 24 and the second piston member 28 and each starting initial position are respectively acquired (S106), the acquired deviation amount A is smaller than the threshold value A (0), and When it is determined that displacement amount B is smaller than threshold value B (0) (YES in S108), compression control is performed by first MG 61 that is the trailing MG (S110). That is, by controlling the first inverter 71 so that the rotation shaft of the first MG 61 rotates, the first piston member 24 rotates as shown by the arrow in FIG.

  As shown in FIG. 9, the rotational position of the first piston member 24 is in a predetermined rotational direction (clockwise direction in the engine 2 shown in FIG. 9) from the rotational position of the first piston member 24 shown in FIG. When rotated, the pressure in the combustion chamber increases due to the compression of the volume of gas in the combustion chamber. At this time, if the pressure in the combustion chamber is lower than the pressure at which ignition is possible, the ignition control is not performed (NO in S112), and the compression control is continued (S122).

  As shown by a solid arrow in FIG. 10, when the rotational position of the first piston member 24 further rotates in a predetermined rotational direction than the rotational position of the first piston member 24 shown in FIGS. The pressure in the combustion chamber further increases due to the further compression of the gas volume therein. At this time, when the gas in the combustion chamber is ignited, the second piston member 28 rotates in a predetermined direction due to the combustion pressure generated by burning the fuel, as shown by the dashed arrow in FIG. If it is determined that ignition has occurred because the rotation speed of the second piston member 28 exceeds the threshold value due to the combustion pressure (YES in S112), continuous operation control is executed (S114).

  For example, when the amount of fuel in the combustion chamber is small, the gas in the combustion chamber may not ignite even at the rotational position of the first piston member 24 shown in FIG. 10 (NO in S112). In such a case, the compression control is continued (NO in S112). As a result, as shown in FIG. 11, when the rotational position of the first piston member 24 further rotates in a predetermined rotational direction than the rotational position of the first piston member 24 shown in FIG. The gas in the combustion chamber is ignited by being compressed until it becomes ignitable (YES in S112), and the continuous operation control is executed (S114).

<When the second piston member 28 is displaced from the initial starting position>
For example, when the engine 2 is stopped, the rotational position of the first piston member 24 is the initial starting position, and the rotational position of the second piston member 28 is smaller than the initial starting position in a direction opposite to a predetermined direction. It is assumed that the rotational position is shifted by (0) or more.

  When the user performs a start operation (YES in S100), the rotational position of first piston member 24 and the rotational position of second piston member 28 are acquired (S102), and second MG 62 is specified as the preceding MG and the second MG 62 is specified. It is assumed that 1MG61 is specified as the trailing MG (S104).

  When the deviation amounts A and B between the first piston member 24 and the second piston member 28 and each starting initial position are obtained (S106), and it is determined that the deviation amount B is equal to or larger than the threshold value B (0). When it is determined that the rotational position can be corrected (NO at S108) (YES at S116), second piston member 28 is rotated in a predetermined rotational direction so as to be in the initial starting position. The second MG 62 is controlled (S118). The shift amounts A and B are obtained again (S120), and it is determined that the obtained shift amount A is smaller than the threshold value A (0) and that the shift amount B is smaller than the threshold value B (0). (YES in S108), compression control is performed by first MG 61 which is the trailing MG.

  The subsequent operation is the same as the operation in the case where both the first piston member 24 and the second piston member 28 are in the initial starting position, and therefore, detailed description thereof will not be repeated.

  As described above, according to the starter of the engine 2 according to the present embodiment, when the start of the engine 2 is required, the first piston member 24 and the second piston member 28 are brought closer to each other to release the gas in the combustion chamber. Is ignited by compressing the fuel, so that one of the first piston member 24 and the second piston member 28 can be rotated by burning the fuel. Therefore, it is possible to control the rotation of the plurality of pistons that rotate and slide in the housing so that the engine 2 enters a predetermined combustion state. Therefore, it is possible to provide a starting device for a rotary piston type engine that controls the rotation of a plurality of pistons that rotate and slide in the housing so that a predetermined combustion state is obtained at the time of starting.

  Furthermore, when the engine 2 is required to start, the first MG 61 or the second MG 62 is controlled such that the first piston member 24 and the second piston member 28 approach each other at a speed at which ignition is possible. By igniting the fuel and burning the fuel, one of the first piston member 24 and the second piston member 28 can be rotated. In particular, if the movement speed of the piston is low, the gas in the combustion chamber leaks from the seal portion of the piston, etc., so that ignition cannot be performed because it is not sufficiently compressed. it can. "The speed at which the ignition becomes possible" means the latter side.

  Further, when the start of the engine 2 is required, if the displacement amount A or B is larger than the threshold value and can be corrected, the first MG 61 is controlled such that the first piston member 24 is at the start initial position. At the same time, the second MG 62 is controlled such that the second piston member 28 is at the starting initial position. Therefore, it is possible to control the rotation of the plurality of pistons that rotate and slide in the housing so that the engine 2 enters a predetermined combustion state.

  Further, when it is determined that the fuel is not ignited in the combustion chamber during the execution of the start control, the first piston member 24 and the second piston member 28 are compressed by bringing the first piston member 24 and the second piston member 28 closer by continuing the compression control. It is possible to reliably ignite.

  Further, when starting of the engine is required, the fuel in the combustion chamber is ignited at the time of the first compression, so that one of the first piston member 24 and the second piston member 28 is rotated by burning the fuel. be able to. Therefore, a predetermined combustion state can be quickly achieved when the engine is started.

  Further, control device 200 controls the power generated by the motor generator connected to the rotated piston member when at least one of first piston member 24 and second piston member 28 rotates with the operation of engine 2. Control. Thus, power can be generated using the motor generator connected to the piston member.

Hereinafter, modified examples will be described.
In the above-described embodiment, the case where the number of the piston members provided in the housing 4 is two has been described as an example. However, the number of the piston members provided in the housing 4 may be three or more. In this case, the fuel may be burned in any one of the plurality of combustion chambers formed in the housing, or the fuel may be burned in the plurality of combustion chambers.

  Further, in the above-described embodiment, the rotation cross section of the concave portion between the first rotating body 24a and the second rotating body 28a has a triangular shape, and both the first piston member 24 and the second piston member 28 have a triangular plate. Although the shape member is described as being provided as the first wall member 24b and the second wall member 28b, the shape of the rotation cross section of the recess and the shapes of the first wall member 24b and the second wall member 28b are limited to triangles. For example, it may be square, semicircular, or fan-shaped.

  Further, in the above-described embodiment, the injector 10 is described as injecting the fuel into the intake pipe 6, but may be configured to directly inject the fuel into the combustion chamber in the compression stroke in the housing 4, for example.

  Further, in the above-described embodiment, the control device 200 has been described as controlling the first inverter 71, the second inverter 72, the throttle motor 14, and the injector 10, but these electric devices are controlled using a plurality of control devices. It may be controlled. For example, control device 200 divides these electrical devices into a first control device that controls first inverter 71 and second inverter 72 and a second control device that controls throttle motor 14 and injector 10. It may be controlled.

  Further, in the above-described embodiment, the description has been given assuming that the fuel in the combustion chamber is ignited at the time of the first compression by continuing the compression control when the fuel is not ignited. ) May be ignited with the fuel in the combustion chamber at the time of compression. For example, when the fuel is not ignited by the compression control, the control device 200 changes the driven object of the first piston member 24 and the second piston member 28 from one piston member to be driven by the immediately preceding compression control to the other. The compression control may be executed by switching to the piston member.

  Further, in the above-described embodiment, the case where the fuel is burned by the self-ignition of the air-fuel mixture in the combustion chamber is described as an example. May be burned.

  In this case, control device 200 performs combustion, for example, when the compression ratio of gas in the combustion chamber reaches a threshold value based on one of the first and second piston members 24 and 28 to be rotated. The spark plug may be controlled to ignite the gas in the room.

  Hereinafter, with reference to FIG. 12, a process executed by the control device 200 in this modified example (hereinafter, referred to as a first modified example) will be described. FIG. 12 is a flowchart illustrating an example of a process performed by the control device 200 according to the first modification.

  The processes of S100 to S120 in the flowchart of FIG. 12 are the same as the processes of S100 to S120 in the flowchart of FIG. 7 except for the points described below. Therefore, the detailed description will not be repeated.

  After the compression control by the trailing MG is performed in S110, the control device 200 calculates the actual rotation speed of the trailing MG in S200. The control device 200 calculates the actual rotation speed of the trailing MG, for example, using the detection result of the resolver specified as the trailing MG of the first resolver 101 and the second resolver 102.

  In S202, control device 200 determines whether or not the compression ratio in the combustion chamber reaches a target compression ratio. The compression ratio is indicated by the ratio of the volume in the combustion chamber at the time when the volume is the largest to the current volume in the combustion chamber. Control device 200 calculates the current compression ratio using, for example, the actual rotation speed of the rear MG, the rotation position of the piston member, and the like. The target compression ratio may be set in advance by, for example, an experiment or the like, or may be set in accordance with the operating state of the engine 2 such as the intake temperature of the engine 2 and the amount of intake air. If it is determined that the compression ratio in the combustion chamber reaches the target compression ratio (YES in S202), the process proceeds to S204. If it is determined that the compression ratio in the combustion chamber has not reached the target compression ratio (NO in S202), the process returns to S200.

  In S204, control device 200 executes ignition control. That is, control device 200 controls the spark plug so that the ignition operation is performed.

  With this configuration, the gas is ignited when the compression ratio of the gas in the combustion chamber reaches the threshold value, so that one of the first piston member 24 and the second piston member 28 can be rotated. Therefore, the first piston member 24 and the second piston member 28 that rotate and slide in the housing 4 can be controlled so that the engine 2 enters a predetermined combustion state.

  Further, in the above-described embodiment, it has been described that it is determined whether or not ignition has occurred after execution of the compression control by the trailing MG. For example, during the execution of the compression control by the trailing MG, the first piston member and the When one of the two piston members rotates in a state of collision with the other, the other may be rotated in a direction away from one.

  Hereinafter, with reference to FIG. 13, a process performed by the control device 200 in this modified example (hereinafter, referred to as a second modified example) will be described. FIG. 13 is a flowchart illustrating an example of a process performed by the control device 200 according to the second modification.

  The processes of S100 to S120 in the flowchart of FIG. 13 are the same as the processes of S100 to S120 in the flowchart of FIG. 7 except for the following points. Therefore, the detailed description will not be repeated.

  After the compression control by the trailing MG is performed in S110, in S300, control device 200 calculates the actual rotation speed of the trailing MG.

  In S302, control device 200 determines whether or not the piston member of the trailing MG may collide with the piston member of the preceding MG. Control device 200 determines, for example, whether or not the rotation state of the piston member of the trailing MG is a rotation state in which a collision may occur. The rotation state includes a rotation speed and a rotation position. Control device 200 may, for example, determine that the rotational state of the piston member of the trailing MG is in a rotational state where there is a possibility of collision when the rotation speed of the piston member exceeds a threshold value, or When the magnitude of the difference between the rotation position of the preceding MG and the rotation position of the piston member of the preceding MG is smaller than the threshold value, it may be determined that the rotation state is likely to cause a collision, or This is a rotation state in which a collision may occur when the rotation speed exceeds the threshold value and the magnitude of the difference between the rotation position of the piston member of the trailing MG and the rotation position of the piston member of the preceding MG falls below the threshold value. May be determined. When it is determined that the piston member of the trailing MG may collide with the piston member of the preceding MG (YES in S302), the process proceeds to S304.

  In S304, control device 200 drives the preceding MG. Control device 200 may, for example, drive preceding MG such that the piston member rotates by a predetermined rotation angle, or move piston MG by a rotation angle set using the rotation speed of the piston member of the following MG. The leading MG may be driven so that the member rotates, or a rotation angle set using the magnitude of the difference between the rotational position of the piston member of the trailing MG and the rotational position of the piston member of the preceding MG. The preceding MG may be driven such that the piston member rotates only by the rotation.

  By doing so, it is possible to avoid collision between the first piston member 24 and the second piston member 28 during the execution of the start control.

  Further, in the above-described embodiment, when the engine 2 is started, the rotational position of the first piston member 24 is not the initial start position, or the rotational position of the second piston member 28 is not the initial start position, the rotational position is corrected. However, for example, when the engine 2 is stopped, the first MG 61 and the first MG 61 are configured to rotate the rotational position of the first piston member 24 and the rotational position of the second piston member 28 to the corresponding initial start positions. The second MG 62 may be controlled.

  Hereinafter, with reference to FIG. 14, a process executed by the control device 200 in this modification (hereinafter, referred to as a third modification) will be described. FIG. 14 is a flowchart illustrating an example of a process performed by the control device 200 according to the third modification.

  At S400, control device 200 determines whether or not there is a stop command. Control device 200 may operate, for example, a sensor or a switch when engine 2 is in an operating state and a user performs an operation for stopping engine 2 (for example, pressing a start button (or a stop button)). If the stop command is detected, it is determined that there is a stop command. If it is determined that there is a stop command (YES in S400), the process proceeds to S402.

  In S402, control device 200 causes engine 2 to stop rotating. Control device 200 may stop the rotation of engine 2 by stopping the rotation of first MG 61 and second MG 62, for example.

  In S404, control device 200 acquires the rotational position of first piston member 24 and the rotational position of second piston member 28. In S406, control device 200 specifies the preceding MG and the following MG. In S408, control device 200 acquires deviation amounts A and B.

  Since the specific processing contents of S404, S406 and S408 are the same as the processing contents of S102, S104 and S106, the detailed description will not be repeated.

  In S410, control device 200 determines whether deviation amount A is smaller than threshold value A (0) and deviation amount B is smaller than threshold value B (0). Since threshold values A (0) and B (0) are as described above, detailed description thereof will not be repeated. When it is determined that deviation amount A is smaller than threshold value A (0) and deviation amount B is smaller than threshold value B (0) (YES in S410), this processing ends.

  If deviation amount A is greater than or equal to threshold value A (0), or deviation amount B is greater than or equal to threshold value B (0) (NO in S410), the process proceeds to S412.

  In S412, control device 200 determines whether or not the rotational position can be corrected. If it is determined that the rotation position can be corrected (YES in S412), the process proceeds to S414.

  In S414, control device 200 corrects the rotational position. In S416, control device 200 acquires deviation amounts A and B. Control device 200 then returns the process to S410. If it is determined that the rotation position cannot be corrected (NO in S412), this process ends. Further, the specific processing contents of S412, S414 and S416 are the same as the processing contents of S116, S118 and S120, and therefore, detailed description thereof will not be repeated.

  With this configuration, when the engine 2 is stopped, the first piston member 24 and the second piston member 28 can be set to the initial starting position. Therefore, when the engine 2 is started, the first piston member 24 and the second piston member The engine 2 can be started by rotating any of the members 28.

  Further, in the above-described embodiment, the case where the first MG 61 is connected to the first piston member 24 and the second MG 62 is connected to the second piston member 28 has been described as an example. However, the first piston member is connected to one motor generator. A configuration may be employed in which one of the second piston member 24 and the second piston member 28 is selectively connected.

  FIG. 15 is a diagram illustrating an example of a configuration of a piston member according to a modification. As shown in FIG. 15, in this modification, the second output shaft 18 connected to the second piston member 28 has a hollow cylindrical shape. The first output shaft 16 connected to the first piston member 24 is provided on the inner peripheral side of the second output shaft 18 so as to pass through the second piston member 28 and the second output shaft 18. The first output shaft 16 and the second output shaft 18 are connected to a rotation shaft 31 of a motor generator 32 via a clutch 30.

  The clutch 30 has, for example, a first state in which the rotating shaft 31 and the first output shaft 16 are connected by an electric actuator (not shown) that operates according to a control signal from the control device 200, and a rotating shaft 31 and a second output. It is configured to be able to switch from any one of the second state in which the shaft 18 is connected to the other.

  Even with such a configuration, as described above, the engine 2 can be started or the engine 2 can be started by selectively switching the state of the clutch 30 to one of the first state and the second state by the control device 200. 2 can be maintained.

The above-described modifications may be implemented by combining all or some of them.
The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Power generation system, 2 engines, 4 housings, 6 intake pipes, 8 exhaust pipes, 10 injectors, 12 throttle valves, 14 throttle motors, 16 first output shaft, 18 second output shaft, 22, 26 one-way clutch, 24 first Piston member, 24a first rotating body, 24b first wall member, 28 second piston member, 28a second rotating body, 28b second wall member, 30 clutch, 32 motor generator, 61 first MG, 62 second MG, 71st 1 inverter, 72 second inverter, 80 battery, 90 load, 101 first resolver, 102 second resolver, 200 control device.

Claims (8)

Including a housing, a first piston member rotatably supported in the housing, and a second piston member rotatably supported in the housing, an inner peripheral surface of the housing and the first piston member A starting device for a rotary piston engine, wherein a combustion chamber for burning fuel is formed by the second piston member and the second piston member.
One or more rotating electric machines that are connected to the first piston member and the second piston member, generate power by functioning as an electric motor, and generate power by functioning as a generator,
A control device for controlling the rotating electric machine,
The control device causes the rotating electric machine to function as an electric motor when the engine is required to be started, and brings the first piston member and the second piston member close to each other to start the compression of the gas in the combustion chamber. A starting device for a rotating piston engine that performs control.   The control device controls the rotating electric machine such that the first piston member and the second piston member approach each other at a speed at which ignition is possible when the engine is required to start. 3. The starting device for a rotary piston type engine according to claim 1.   3. The starting device according to claim 1, wherein the control device ignites the fuel in the combustion chamber at the first or several times of the compression when the starting of the engine is required. 4.   The control device controls the rotating electric machine such that the first piston member is at a first position, which is an initial start position, before executing the start control when the start of the engine is required. 4. The starting device for a rotary piston engine according to claim 1, wherein the rotating electric machine is controlled such that the second piston member is at a second position that is the initial starting position. 5.   The control device controls the rotating electric machine such that the first piston member is at a first position, which is an initial starting position, when the engine is stopped, and the second piston member is at the initial starting position. The starting device for a rotary piston engine according to any one of claims 1 to 3, wherein the rotating electric machine is controlled to be in a second position.   The control device, during the execution of the start control, when the rotation state of one of the first piston member and the second piston member is a rotation state that collides with the other, the other from the one from the one The starting device for a rotary piston type engine according to any one of claims 1 to 5, wherein the starting device is configured to rotate in a direction away from the engine.   The control device determines whether fuel is ignited in the combustion chamber during execution of the start control, and when it is determined that fuel is not ignited in the combustion chamber, the first piston member The starting device for a rotary piston type engine according to any one of claims 1 to 6, wherein the ignition is performed by further bringing the second piston member and the second piston member closer to each other.   8. The control device according to claim 1, wherein the control device controls generated power of the rotating electric machine when at least one of the first piston member and the second piston member rotates with the operation of the engine. 9. A starting device for a rotary piston engine according to any one of the above.

Images