JP6631471B2 - Engine starting device and vehicle - Google Patents

Description

  The present invention relates to an engine starting device for starting an engine.

  2. Description of the Related Art Conventionally, in a vehicle that automatically stops and restarts an engine, a pinion gear of a starter meshes with a ring gear when the engine is coasting (see Patent Document 1). In the configuration described in Patent Document 1, after the engine is completely stopped, the rotation position of the crankshaft (output shaft) is rotated by a starter motor to a target rotation position optimal for restarting the engine. Thus, according to Patent Document 1, the start time of the engine can be significantly reduced.

Japanese Patent No. 4608549

  By the way, the present inventors have noticed that the crankshaft may rotate after the crankshaft is rotated to the target rotation position. In this case, the rotational position of the crankshaft is deviated from the target rotational position, and there is a possibility that the engine start time cannot be reduced.

  In particular, such a tendency is remarkable in a vehicle in which the engine is stopped to perform coasting running (coasting running) or in a vehicle in which the engine is stopped to run by motor (EV running).

  The present invention has been made in order to solve such a problem, and it is an object of the present invention to reduce the engine start time even when the output shaft is rotated after stopping the output shaft of the engine at a target rotation position. It is to provide an engine starting device which can be used.

A first means for solving the above-mentioned problem is:
An engine starter for starting an engine (10) that generates a driving force by burning fuel,
A rotating electric machine (20, 60) for rotating an output shaft (11) of the engine;
A rotation position detector (41, 42) for detecting a rotation position of the output shaft;
After the operation of the engine is stopped, based on the rotation position detected by the rotation position detection unit, the output shaft is rotated by the rotating electric machine to a target rotation position set for starting the engine, and then stopped. A first positioning portion (30) to be
A position where the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit after the output shaft is stopped at the target rotation position by the first positioning unit. A position shift detector (30) for detecting that a shift has occurred,
When the displacement is detected by the displacement detection unit, the output shaft is rotated by the rotating electric machine to the target rotation position based on the rotation position detected by the rotation position detection unit. A second positioning portion (30) for stopping the operation;
Is provided.

  According to the above configuration, the rotation position of the output shaft is detected by the rotation position detection unit. A first positioning unit configured to rotate the output shaft of the engine by the rotating electric machine to a target rotation position set for starting the engine based on the rotation position detected by the rotation position detection unit after the operation of the engine is stopped. To stop.

  However, the output shaft of the engine may rotate for some reason, and the rotational position of the output shaft may deviate from the target rotational position. For example, in a vehicle that performs coasting traveling or a vehicle that performs EV traveling, the output shaft tends to rotate due to vibration of the vehicle in such traveling after the engine stops.

  In this regard, after stopping the output shaft at the target rotation position, the position shift detection unit generates a position shift that the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit. Is detected. Then, when it is detected that the displacement has occurred, the second positioning unit rotates the output shaft to the target rotation position based on the rotation position detected by the rotation position detection unit and stops the output shaft. . Therefore, even when the output shaft of the engine is stopped at the target rotation position and then the output shaft is rotated, the output shaft is again rotated to the target rotation position and stopped, so that the engine start time can be reduced. it can.

  If the rotation position of the output shaft deviates from the target rotation position after the second positioning unit rotates and stops the output shaft by the rotating electric machine to the target rotation position, the position deviation is detected by the position deviation detection unit. Is detected. Then, the second positioning unit rotates the output shaft again by the rotating electric machine to the target rotation position and stops the output shaft.

  The rotational position of the output shaft may deviate from the target rotational position in the normal rotation direction or may deviate in the reverse rotation direction. For this reason, the rotation angle when rotating the output shaft from the shifted rotation position to the target rotation position changes depending on the direction in which the output shaft is rotated.

  In this regard, in the second means, the second positioning unit is configured to detect the position shift from the rotation position detected by the rotation position detection unit when the position shift detection unit detects that the position shift has occurred. A configuration is employed in which the output shaft is rotated by the rotating electric machine in the minimum rotation direction in which the rotation angle to the target rotation position is the smallest and stopped at the target rotation position. Therefore, the output shaft can be rotated from the rotational position after the displacement to the target rotational position without waste, and the time required to stop the output shaft again at the target rotational position can be reduced.

  In a multi-cylinder engine, there may be a plurality of target rotation positions set for starting the engine during one rotation of the output shaft. In this case, if the output shaft is rotated from the rotational position after the displacement to the nearest target rotational position, the time until the output shaft stops again at the target rotational position can be minimized.

  In this regard, in the third means, a plurality of the target rotation positions are set during one rotation of the output shaft, and the second positioning unit determines that the position shift has occurred by the position shift detection unit. When detected, the output shaft is rotated by the rotating electric machine in the minimum rotation direction that approaches the target rotation position closest to the rotation position detected by the rotation position detection unit at the minimum rotation angle. A configuration is adopted in which the rotation is stopped at the target rotation position that is close. Therefore, when the rotation position of the output shaft deviates from the target rotation position, it is possible to minimize the time until the output shaft is stopped again at the target rotation position.

  The maximum torque that can be generated by the rotating electric machine may be different between the case where the output shaft is rotated in the normal direction and the case where the output shaft is rotated in the reverse direction. Further, the rotation resistance of the output shaft may be different between the case where the output shaft is rotated in the normal rotation direction and the case where the output shaft is rotated in the reverse rotation direction. For this reason, the output shaft may not be able to be rotated by the rotating electric machine depending on the direction in which the output shaft is rotated.

  In this regard, in the fourth means, the second positioning unit, when it is determined that the output shaft does not rotate when rotating the output shaft in the minimum rotation direction by the rotating electric machine, The output shaft is rotated in the direction opposite to the minimum rotation direction and stopped at the target rotation position. Therefore, if the output shaft is not rotated in the minimum rotation direction in which the rotation angle from the shifted rotation position to the target rotation position is the smallest, the output shaft is rotated in the direction opposite to the minimum rotation direction. Thus, it can be stopped at the target rotation position.

  In the fifth means, when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotating electric machine exceeds a predetermined torque, the output shaft and the rotating electric machine are disposed between the output shaft and the rotating electric machine. A one-way clutch (22) for disconnecting from the electric machine is provided, and the second positioning portion is transmitted from the rotating electric machine to the output shaft when the rotating shaft rotates the output shaft in the reverse direction. Is set smaller than the predetermined torque.

  According to the above configuration, the one-way clutch is used when the engine generates a driving force due to the combustion of fuel when the engine is started and the torque transmitted from the output shaft rotating in the normal rotation direction to the rotating electric machine exceeds a predetermined torque. Thus, the output shaft and the rotating electric machine are shut off. For this reason, it is possible to prevent the rotating electric machine from being excessively rotated by the output shaft of the engine.

  However, when the rotating shaft rotates the output shaft in the reverse direction to the target rotation position, the state is the same as the state in which torque is transmitted from the output shaft rotating in the forward rotation direction to the rotating machine. For this reason, when the torque transmitted via the one-way clutch exceeds the predetermined torque, the one-way clutch cuts off the output shaft and the rotating electric machine, and the output shaft cannot be rotated to the target rotation position. In this regard, the second positioning unit sets the torque transmitted from the rotating electric machine to the output shaft to be smaller than the predetermined torque when the rotating shaft rotates the output shaft in the reverse direction. Therefore, even with a configuration in which a one-way clutch is provided between the output shaft and the rotating electric machine, the output shaft can be rotated in the reverse direction to the target rotational position by the rotating electric machine.

  In the sixth means, when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotating electrical machine exceeds a predetermined torque, the output shaft and the rotating electrical machine are provided between the output shaft and the rotating electrical machine. A one-way clutch for disconnecting from the electric machine is provided, a rotational speed detecting unit (42) for detecting a rotational speed of the rotating electric machine is provided, and the second positioning unit is configured to rotate the output shaft in a reverse direction by the rotating electric machine; And when the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed, the torque transmitted from the rotary electric machine to the output shaft is reduced below the current torque.

  When the output shaft and the rotating electric machine are cut off by the one-way clutch, the load on the rotating electric machine is reduced, and the rotating speed of the rotating electric machine is increased. Therefore, it is possible to determine whether or not the output shaft and the rotating electric machine have been disconnected by the one-way clutch based on the rotation speed of the rotating electric machine.

  In this regard, the rotation speed of the rotating electric machine is detected by the rotation speed detection unit. The second positioning unit rotates the output shaft in the reverse direction by the rotating electric machine, and is transmitted from the rotating electric machine to the output shaft when the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed. Reduce the torque below the current torque. For this reason, when the output shaft and the rotating electric machine are disconnected by the one-way clutch, the torque transmitted from the rotating electric machine to the output shaft is reduced, and the output shaft can be rotated in the reverse direction to the target rotation position. .

  In the seventh means, when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotary electric machine exceeds a predetermined torque, the output shaft and the rotary electric machine are provided between the output shaft and the rotary electric machine. A one-way clutch for disconnecting from the electric machine is provided, and a rotational speed detecting unit for detecting a rotational speed of the rotating electric machine is provided, and the second positioning unit rotates the output shaft in a reverse direction by the rotating electric machine. When the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed, the rotating electric machine rotates the output shaft in a normal rotation direction and stops at the target rotation position.

  According to the above configuration, the second positioning unit rotates the output shaft in the reverse direction by the rotating electric machine, and outputs the signal by the rotating electric machine when the rotation speed detected by the rotation speed detection unit exceeds the predetermined rotation speed. The shaft is rotated in the normal rotation direction and stopped at the target rotation position. Therefore, when the one-way clutch disconnects the output shaft and the rotating electric machine, the output shaft can be rotated in the forward direction to the target rotation position and stopped.

  Even if the output shaft and the rotating electric machine are cut off by the one-way clutch, the rotating electric machine causes the output shaft to rotate in the reverse direction again, or the torque transmitted from the rotating electric machine to the output shaft to be lower than the current torque. In some cases, the output shaft can be rotated in the reverse direction.

  In this regard, in the eighth aspect, in the eighth means, the second positioning unit rotates the output shaft in the reverse rotation direction by the rotating electric machine, and the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed. In this case, the output shaft is rotated in the forward direction by the rotating electric machine and stopped at the target rotation position on condition that the number of occurrences is equal to or more than a specified number. For this reason, rotating the output shaft in the reverse direction by the rotating electric machine is repeatedly attempted up to the specified number of times, and if the output shaft cannot be rotated in the reverse direction even after reaching the specified number of times, the output shaft is rotated in the normal direction. Rotated. Therefore, the output shaft can be surely rotated to the target rotation position and stopped while the output shaft is rotated in the normal rotation direction or the reverse rotation direction.

The ninth means is an engine starter for starting an engine (10) that generates a driving force by burning fuel,
A rotating electric machine (20, 60) for rotating an output shaft (11) of the engine;
A rotation position detector (41, 42) for detecting a rotation position of the output shaft;
After the operation of the engine is stopped, based on the rotation position detected by the rotation position detection unit, the output shaft is rotated by the rotating electric machine to a target rotation position set for starting the engine, and then stopped. A first positioning portion (30) to be
A position where the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit after the output shaft is stopped at the target rotation position by the first positioning unit. A position shift detector (30) for detecting that a shift has occurred,
When the displacement is detected by the displacement detector, the output shaft is immediately rotated by the rotating electric machine to the target rotational position based on the rotational position detected by the rotational position detector. A target position maintaining unit (30) for causing the vehicle to stop,
Is provided.

  According to the above configuration, when the position shift detection unit detects that the position shift has occurred, the target position maintaining unit sets the rotating electric machine to the target rotation position based on the rotation position detected by the rotation position detection unit. Immediately rotates the output shaft to stop. Therefore, the rotation position of the output shaft can be substantially maintained at the target rotation position, and the engine start time can be shortened.

  In a tenth aspect, a rotation speed detection unit for detecting a rotation speed of the rotating electric machine is provided, and the rotation position detection unit is configured to rotate the output shaft based on the rotation speed detected by the rotation speed detection unit. Calculate the position.

  According to the above configuration, the rotation speed of the rotating electric machine is detected by the rotation speed detection unit. Then, the rotation position of the output shaft is calculated by the rotation position detection unit based on the rotation speed detected by the rotation speed detection unit. For this reason, the rotation speed detection unit that detects the rotation speed of the rotating electric machine can be used as a rotation position detection unit that detects the rotation position of the output shaft. Therefore, the wiring can be simplified as compared with a configuration in which a signal of the rotation position is transmitted from the rotation speed detection unit and a separate rotation position detection unit by wiring.

  An eleventh means is a vehicle, which includes the engine starting device of any one of the first to tenth means, and the engine, and runs while the operation of the engine is stopped.

  According to the above configuration, a vehicle that travels while the operation of the engine is stopped is provided with the engine starting device of any one of the first to tenth means. Therefore, for example, in a vehicle that performs coasting traveling or a vehicle that performs EV traveling, even if the output shaft rotates due to the vibration of the vehicle in these traveling after the engine stops, the output shaft is again rotated to the target rotational position and stopped. be able to. As a result, even if the vehicle runs while the operation of the engine is stopped, the engine start time can be reduced.

FIG. 1 is a schematic diagram illustrating an engine starting device according to a first embodiment. 5 is a flowchart illustrating a procedure of repositioning control according to the first embodiment. 9 is a flowchart illustrating a procedure of repositioning control according to the second embodiment. 9 is a flowchart illustrating a procedure of repositioning control according to the second embodiment. 9 is a flowchart illustrating a procedure of repositioning control according to the second embodiment. 13 is a flowchart illustrating a procedure of repositioning control according to the third embodiment. 13 is a flowchart illustrating a procedure of repositioning control according to the third embodiment. FIG. 9 is a schematic diagram illustrating an engine start device according to a fourth embodiment. 13 is a flowchart illustrating a procedure of repositioning control according to the fourth embodiment. FIG. 9 is a schematic diagram illustrating an engine start device according to a fifth embodiment. 15 is a flowchart illustrating a procedure of repositioning control according to the fifth embodiment. 15 is a flowchart illustrating a procedure of repositioning control according to a sixth embodiment. 17 is a flowchart illustrating a procedure of repositioning control according to the seventh embodiment. FIG. 4 is a schematic diagram showing a modified example of the engine starting device. FIG. 9 is a schematic view showing another modification of the engine starting device. FIG. 9 is a schematic view showing another modification of the engine starting device.

(1st Embodiment)
Hereinafter, a first embodiment embodied in an engine mounted on a vehicle and an engine starting device will be described with reference to the drawings.

  As shown in FIG. 1, a motor 20 is connected to a crankshaft 11 (corresponding to an output shaft) of the engine 10. As the engine 10, a gasoline engine, a diesel engine, or the like can be employed. The engine 10 generates a driving force for running the vehicle by burning fuel. The motor 20 (corresponding to a rotating electric machine) rotates the crankshaft 11 by electric power supplied from a battery (not shown). Specifically, the motor 20 rotates the crankshaft 11 in the normal rotation direction by the forward rotation drive, and rotates the crankshaft 11 in the reverse rotation direction by the reverse rotation drive. The engine 10 is provided with a crank angle sensor 41 (corresponding to a rotation position detection unit) for detecting the rotation position of the crankshaft 11.

  The operating state of the engine 10 is controlled by an ECU (Electronic Control Unit) 30. The ECU 30 is configured as a microcomputer including a CPU, a ROM, a RAM, an input / output interface, and the like. Detection values of various sensors such as the crank angle sensor 41 are input to the ECU 30. Note that the motor 20, the crank angle sensor 41, and the ECU 30 constitute an engine starting device.

  In the present embodiment, the ECU 30 executes the automatic stop and the automatic restart of the engine 10. Specifically, the ECU 30 automatically stops the engine 10 when a predetermined automatic stop condition is satisfied. Then, the ECU 30 performs coasting traveling in which the vehicle coasts while the operation of the engine 10 is stopped. Thereafter, the ECU 30 automatically restarts the engine 10 when a predetermined automatic restart condition is satisfied.

  Further, after the operation of the engine 10 is stopped, the ECU 30 causes the motor 20 to rotate the crankshaft to a target rotation position set for starting the engine 10 based on the rotation position of the crankshaft 11 detected by the crank angle sensor 41. Rotate 11 to stop. The target rotation position is a rotation position of the crankshaft 11 suitable for starting the engine 10. For example, if the engine 10 is a port injection type engine, the rotation position (TDC) of the crankshaft 11 at which the intake stroke starts is set to the target rotation position. If the engine 10 is an in-cylinder direct injection engine, the rotation position (BDC) of the crankshaft 11 at which the compression stroke starts is set to the target rotation position.

  However, the crankshaft 11 of the engine 10 may rotate for some reason, and the rotational position of the crankshaft 11 may deviate from the target rotational position. In particular, in a vehicle that performs coasting travel, the crankshaft 11 is likely to rotate due to vibration of the vehicle during coasting travel after the engine 10 stops. Therefore, in the present embodiment, when the ECU 30 detects that the rotational position of the crankshaft 11 deviates from the target rotational position, the ECU 30 rotates the crankshaft 11 to the target rotational position and stops the rotation. Execute

  FIG. 2 is a flowchart illustrating the procedure of the repositioning control. This series of processing is executed by the ECU 30 when the condition for automatically stopping the engine 10 is satisfied.

  First, the crankshaft 11 is rotated to the target rotation position and stopped (S11). Specifically, the crankshaft 11 is rotated by the motor 20 so that the rotation position of the crankshaft 11 detected by the crank angle sensor 41 becomes the target rotation position. When the detected rotation position becomes the target rotation position, The motor 20 is stopped.

  Subsequently, it is determined whether or not there is a command to start the engine 10 (S12). Specifically, it is determined that there is a start command when the automatic restart condition of the engine 10 is satisfied, and it is determined that there is no start command when the automatic restart condition is not satisfied.

  When it is determined in S12 that there is no start command for the engine 10 (S12: NO), it is determined whether or not the occurrence of the displacement of the crankshaft 11 has been detected (S13). Specifically, after the crankshaft 11 is stopped at the target rotation position, if the rotation position of the crankshaft 11 detected by the crank angle sensor 41 is larger than the predetermined rotation angle from the target rotation position, the position is determined. It detects that a shift has occurred. The predetermined rotation angle is a rotation angle at which the start time of the engine 10 may be extended, and is set to, for example, 45 ° CA.

  If it is determined in S13 that the displacement of the crankshaft 11 has not been detected (S13: NO), the process is repeated from S12. On the other hand, if it is determined in S13 that the displacement of the crankshaft 11 has been detected (S13: YES), the motor 20 is driven (S14). Specifically, the motor 20 is driven to rotate forward to rotate the crankshaft 11 in the forward direction.

  Subsequently, it is determined whether or not the crankshaft 11 has rotated to the target rotation position (S15). Specifically, it is determined whether or not the rotational position of the crankshaft 11 detected by the crank angle sensor 41 has reached the target rotational position. In this determination, when it is determined that the crankshaft 11 has not rotated to the target rotation position (S15: NO), the processing is repeated from the processing of S14.

  On the other hand, if it is determined in S15 that the crankshaft 11 has rotated to the target rotation position (S15: YES), the motor 20 is stopped, and the processing from S12 is executed again.

  If it is determined in S12 that there is a command to start the engine 10 (S12: YES), the engine 10 is started (S16). Specifically, cranking of the engine 10 is performed by the motor 20, and combustion of fuel in the engine 10 is started. Thereafter, this series of processing ends (END).

  Note that the processing in S11 corresponds to processing as a first positioning section, the processing in S13 corresponds to processing as a position shift detecting section, and the processing in S14 and S15 correspond to processing as a second positioning section.

  The present embodiment described above has the following advantages.

  After stopping the crankshaft 11 at the target rotational position, the ECU 30 determines that the rotational position of the crankshaft 11 has shifted from the target rotational position based on the rotational position detected by the crank angle sensor 41. To detect. Then, when it is detected that the displacement has occurred, the ECU 30 causes the motor 20 to rotate the crankshaft 11 to the target rotation position based on the rotation position detected by the crank angle sensor 41, and stops the rotation. Therefore, even if the crankshaft 11 of the engine 10 is stopped after stopping at the target rotation position, the crankshaft 11 is again rotated to the target rotation position and stopped, so that the starting time of the engine 10 is reduced. Can be shortened.

  -If the rotation position of the crankshaft 11 is shifted from the target rotation position after the crankshaft 11 is rotated by the motor 20 to the target rotation position and stopped by the processing of S14 and S15, the position shift occurs by the processing of S13. Is detected. Then, the ECU 30 rotates the crankshaft 11 again by the motor 20 to the target rotation position and stops the rotation. For this reason, even if the displacement occurs a plurality of times, the crankshaft 11 can be rotated to the target rotation position and stopped.

  In a vehicle that travels with the operation of the engine 10 stopped, repositioning control of the crankshaft 11 is executed. Therefore, even if the crankshaft 11 rotates due to the vibration of the vehicle during coasting after the engine 10 is stopped, the crankshaft 11 can be rotated again to the target rotation position and stopped. As a result, even if the vehicle runs while the operation of the engine 10 is stopped, the start time of the engine 10 can be reduced.

  In the process of S14, the motor 20 may be driven in the reverse direction to rotate the crankshaft 11 in the reverse direction.

(2nd Embodiment)
Hereinafter, a second embodiment in which the rotation direction in the repositioning control is switched according to the direction of displacement of the crankshaft 11 will be described with reference to FIGS. Note that the same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  In this embodiment, a port injection type four-cylinder (multi-cylinder) four-stroke engine is used as the engine 10. Therefore, the piston reaches TDC, that is, the target rotation position in any one of the cylinders every 180 ° CA. Therefore, two target rotation positions are set during one rotation of the crankshaft 11.

  Here, the rotational position of the crankshaft 11 may be shifted from the target rotational position in the normal rotation direction or may be shifted in the reverse rotation direction. Therefore, the rotation angle when rotating the crankshaft 11 from the shifted rotation position to the target rotation position changes depending on the direction in which the crankshaft 11 is rotated. Furthermore, if the crankshaft 11 is rotated from the rotational position after the shift to the nearest target rotational position, the time until the crankshaft 11 stops again at the target rotational position can be minimized.

  Therefore, in the re-positioning control of the present embodiment, when it is detected that a positional deviation has occurred, the ECU 30 approaches the rotational position detected by the crank angle sensor 41 to the nearest target rotational position with the minimum rotational angle. The crankshaft 11 is rotated in the minimum rotation direction to stop at the nearest target rotation position. For example, when the crankshaft 11 rotates less than 90 ° CA in the normal rotation direction from the target rotation position, the crankshaft 11 is rotated less than 90 ° CA in the reverse rotation direction to return to the stopped target rotation position. On the other hand, when the crankshaft 11 has rotated from the target rotation position by 90 ° CA or more and less than 180 CA ° in the normal rotation direction, the crankshaft 11 is rotated by less than 90 ° in the normal rotation direction to reach the next target rotation position.

  FIG. 3 is a flowchart illustrating the procedure of the repositioning control of the present embodiment. This series of processing is executed by the ECU 30 when the condition for automatically stopping the engine 10 is satisfied. The description of the same processes as those in FIG. 2 will be omitted by retaining the same step numbers.

  The processing in S11 to S13 in FIG. 3 is the same as the processing in S11 to S13 in FIG. If it is determined in S13 that the displacement of the crankshaft 11 has been detected (S13: YES), it is determined whether the crankshaft 11 is rotating in the normal rotation direction (S21). Specifically, based on the rotational position of the crankshaft 11 detected by the crank angle sensor 41 and the target rotational position, it is determined whether the crankshaft 11 is rotating in the normal rotation direction from the target rotational position.

  If it is determined in S21 that the crankshaft 11 is rotating in the normal rotation direction (S21: YES), it is determined whether or not the crankshaft 11 is rotated by 90 ° CA or more from the target rotation position (S22). . In this determination, when it is determined that the crankshaft 11 has rotated 90 ° CA or more from the target rotation position (S22: YES), the process proceeds to No. 1 in FIG.

  As shown in FIG. 4, subsequently, the motor 20 is driven to rotate normally (S14A), and it is determined whether or not the crankshaft 11 has rotated to the target rotation position (S15).

  If it is determined in S15 that the crankshaft 11 has not rotated to the target rotation position (S15: NO), the process is repeated from S14A. On the other hand, when it is determined in S15 that the crankshaft 11 has rotated to the target rotation position (S15: YES), the motor 20 is stopped, and the process proceeds to No. 3 in FIG. Then, the process is executed again from the process of S12.

  When it is determined in step S22 that the crankshaft 11 has not rotated by 90 ° CA or more from the target rotation position (S22: NO), the process proceeds to No. 2 in FIG.

  As shown in FIG. 5, subsequently, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether or not the crankshaft 11 has rotated to the target rotation position (S15).

  If it is determined in S15 that the crankshaft 11 is not rotating to the target rotation position (S15: NO), the process is repeated from S14B. On the other hand, when it is determined in S15 that the crankshaft 11 has rotated to the target rotation position (S15: YES), the motor 20 is stopped, and the process proceeds to No. 3 in FIG. Then, the process is executed again from the process of S12.

  When it is determined in S21 that the crankshaft 11 is not rotating in the normal rotation direction (S21: NO), it is determined whether or not the crankshaft 11 is rotated by 90 ° CA or more from the target rotation position (S21). S23). In this determination, when it is determined that the crankshaft 11 has rotated 90 ° CA or more from the target rotation position (S23: YES), the process proceeds to No. 2 in FIG.

  On the other hand, if it is determined in step S23 that the crankshaft 11 has not rotated by 90 ° CA or more from the target rotation position (S23: NO), the process proceeds to No. 1 in FIG.

  Then, when it is determined in S12 of FIG. 3 that there is a command to start the engine 10 (S12: YES), the engine 10 is started (S16). Thereafter, this series of processing ends (END).

  The present embodiment described above has the following advantages. Here, only advantages different from the first embodiment will be described.

  The ECU 30 rotates the crankshaft 11 by the motor 20 in a direction in which the rotation angle from the rotation position detected by the crank angle sensor 41 to the target rotation position becomes smallest when it is detected that the position shift has occurred. And stopped at the target rotation position. For this reason, the crankshaft 11 can be rotated from the rotational position after the shift to the target rotational position without waste, and the time required to stop the crankshaft 11 again at the target rotational position can be reduced.

  -Two (plural) target rotational positions are set during one rotation of the crankshaft 11, and the ECU 30 detects the rotational position detected by the crank angle sensor 41 when it is detected that a positional deviation has occurred. The motor 20 rotates the crankshaft 11 in the minimum rotation direction that approaches the nearest target rotation position from the target rotation position with the minimum rotation angle, and stops at the nearest target rotation position. For this reason, when the rotational position of the crankshaft 11 deviates from the target rotational position, the time until the crankshaft 11 is stopped again at the target rotational position can be minimized.

  The embodiment is not limited to a four-cylinder four-stroke engine, but may be applied to other multi-cylinder four-stroke engines. In this case, for example, in the case of a six-cylinder four-stroke engine, in the processing of S22 and S23, 90 ° CA may be changed to 60 ° CA.

(Third embodiment)
Hereinafter, a third embodiment in which the rotation direction in the repositioning control is switched according to whether the crankshaft 11 rotates when the motor 20 is driven will be described with reference to FIGS. In addition, about the same part as 1st and 2nd embodiment, description is abbreviate | omitted by attaching | subjecting the same code | symbol.

  The maximum torque that can be generated by the motor 20 may be different between the case where the crankshaft 11 is rotated in the forward direction (forward rotation drive) and the case where the crankshaft 11 is rotated in the reverse direction (reverse rotation drive). Further, the rotational resistance of the crankshaft 11 may be different between the case where the crankshaft 11 is rotated in the normal direction and the case where the crankshaft 11 is rotated in the reverse direction. Therefore, depending on the direction in which the crankshaft 11 is rotated, the motor 20 may not be able to rotate the crankshaft 11 in some cases.

  Therefore, in the repositioning control of the present embodiment, when the ECU 30 determines that the crankshaft 11 does not rotate when the motor 20 rotates the crankshaft 11 in the minimum rotation direction, the ECU 30 sets the crankshaft 11 to the minimum rotation direction. Rotate in the opposite direction and stop at the target rotation position. Specifically, the processing of FIG. 6 is executed instead of the processing of FIG. 4, and the processing of FIG. 7 is executed instead of the processing of FIG. 6 and 7 are executed by the ECU 30. 4 and 5 are denoted by the same step numbers, and description thereof is omitted.

  As shown in FIG. 6, the motor 20 is driven to rotate forward (S14A), and it is determined whether or not the crankshaft 11 has rotated (S31). Specifically, it is determined whether or not the rotation angle detected by the crank angle sensor 41 has changed before and after the forward rotation of the motor 20.

  If it is determined in S31 that the crankshaft 11 has rotated (S31: YES), it is determined whether or not the crankshaft 11 has rotated to the target rotation position (S15). On the other hand, if it is determined in step S31 that the crankshaft 11 is not rotating (S31: NO), the process proceeds to number 2 in FIG.

  As shown in FIG. 7, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether or not the crankshaft 11 has rotated (S31).

  If it is determined in S31 that the crankshaft 11 has rotated (S31: YES), it is determined whether or not the crankshaft 11 has rotated to the target rotation position (S15). On the other hand, if it is determined in S31 that the crankshaft 11 is not rotating (S31: NO), the process proceeds to No. 1 in FIG.

  The present embodiment described above has the following advantages. Here, only the advantages different from the first and second embodiments will be described.

  If the ECU 30 determines that the crankshaft 11 does not rotate when the motor 20 rotates the crankshaft 11 in the minimum rotation direction, the ECU 30 causes the motor 20 to rotate the crankshaft 11 in the direction opposite to the minimum rotation direction and sets the target. Stop at the rotating position. Therefore, when the crankshaft 11 is not rotated in the minimum rotation direction in which the rotation angle from the rotational position after the displacement to the target rotation position is the smallest, the crankshaft 11 is rotated in the direction opposite to the minimum rotation direction. To stop at the target rotation position.

  When the process from step S31 in FIG. 6 to step 2 in FIG. 7 and the process from step S31 in FIG. 7 to step 1 in FIG. 6 are repeated a predetermined number of times, the ECU 30 fails. As a safe process, the start of the engine 10 may be stopped.

(Fourth embodiment)
Hereinafter, a fourth embodiment in which a one-way clutch is provided between the crankshaft 11 and the motor 20 and the motor 20 is driven to rotate in the reverse direction so that the one-way clutch will not be disconnected will be described with reference to FIGS. I do. Note that the same parts as those in the first to third embodiments are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 8, a ring gear 12 is connected to a crankshaft 11 of the engine 10. A pinion shaft 23 is connected to a rotation shaft 21 of the motor 20 via a one-way clutch 22. A pinion gear 24 is connected to the pinion shaft 23. The ring gear 12 and the pinion gear 24 are always meshed.

  The one-way clutch 22 transmits a torque transmitted from the crankshaft 11 rotating in the normal rotation direction to the rotating shaft 21 of the motor 20 via the ring gear 12, the pinion gear 24, and the pinion shaft 23 to a clutch disengaging torque (a predetermined torque). If it exceeds the torque, the pinion shaft 23 (that is, the crankshaft 11) and the rotating shaft 21 (that is, the motor 20) are shut off. When the motor 20 is driven in the reverse direction, the state in which torque is transmitted from the crankshaft 11 rotating in the forward direction to the motor 20 is equal to the state in which torque is transmitted. Therefore, the one-way clutch 22 cuts off the motor 20 and the crankshaft 11 when the torque transmitted from the rotating shaft 21 of the motor 20 that rotates in the reverse direction to the crankshaft 11 exceeds the clutch breaking torque.

  According to the above configuration, when the engine 10 generates a driving force due to combustion of fuel at the time of starting the engine 10 and the torque transmitted from the crankshaft 11 rotating in the forward rotation direction to the motor 20 exceeds the clutch disconnection torque. The one-way clutch 22 disconnects the crankshaft 11 and the motor 20. For this reason, when starting the engine 10, the motor 20 can be prevented from being excessively rotated by the crankshaft 11 of the engine 10.

  However, when rotating the crankshaft 11 in the reverse direction to the target rotation position by the motor 20 and the torque transmitted via the one-way clutch 22 exceeds the clutch disconnection torque, the one-way clutch 22 causes the crankshaft 11 and the motor to rotate. Thus, the crankshaft 11 cannot be rotated to the target rotation position.

  Therefore, in the repositioning control of the present embodiment, when the motor 20 rotates the crankshaft 11 in the reverse direction, the ECU 30 sets the torque transmitted from the motor 20 to the crankshaft 11 to be smaller than the clutch disconnection torque. Specifically, in the third embodiment, the processing in FIG. 9 is executed instead of the processing in FIG. 9 is executed by the ECU 30. The description of the same processes as those in FIG. 7 will be omitted by retaining the same step numbers.

  As shown in FIG. 9, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether the torque generated by the motor 20 is equal to or less than the clutch disconnection torque (S25). For example, the torque generated by the motor 20 is estimated by detecting the current flowing through the motor 20. Then, it is determined whether or not the estimated torque is equal to or less than the clutch disconnection torque.

  If it is determined in S25 that the torque generated by the motor 20 is not equal to or less than the clutch disconnection torque (S25: NO), the torque command value for driving the motor 20 is reduced from the current torque command value (S26). . Then, the process is executed again from the process of S14B.

  On the other hand, if it is determined in S25 that the torque generated by the motor 20 is equal to or less than the clutch disconnection torque (S25: YES), it is determined whether the crankshaft 11 has rotated (S31). The processes after S31 are the same as those in FIG.

  The present embodiment described above has the following advantages. Here, only the advantages different from the third embodiment will be described.

  When the motor 20 rotates the crankshaft 11 in the reverse direction, the ECU 30 sets the torque transmitted from the motor 20 to the crankshaft 11 to be smaller than the clutch disconnection torque. Therefore, even in a configuration in which the one-way clutch 22 is provided between the crankshaft 11 and the motor 20, the motor 20 can rotate the crankshaft 11 in the reverse direction to the target rotation position.

  If the ECU 30 determines that the crankshaft 11 does not rotate even if the torque transmitted from the motor 20 to the crankshaft 11 is set to be smaller than the clutch disconnection torque (S31: NO), the motor 20 controls the crankshaft 11 by the motor 20. The motor rotates in the normal rotation direction and stops at the target rotation position. Therefore, when the crankshaft 11 cannot be rotated in the reverse rotation direction, the crankshaft 11 can be rotated in the direction opposite to the minimum rotation direction (forward rotation direction) and stopped at the target rotation position.

(Fifth embodiment)
Hereinafter, a fifth embodiment in which the driving torque of the motor 20 is reduced when the one-way clutch 22 enters the disengaged state will be described with reference to FIGS. Note that the same parts as those of the first to fourth embodiments are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIG. 10, a rotation speed detection unit 42 that detects the rotation speed of the rotation shaft 21 of the motor 20 is attached to the motor 20. As the rotation speed detection unit 42, a resolver, an encoder, a Hall element, or the like can be employed.

  When the one-way clutch 22 disconnects the crankshaft 11 from the motor 20, the load on the motor 20 decreases, and the rotation speed of the motor 20 increases. Therefore, it is possible to determine whether or not the crankshaft 11 and the motor 20 are disconnected by the one-way clutch 22 based on the rotation speed of the motor 20.

  Therefore, in the repositioning control of the present embodiment, the ECU 30 causes the motor 20 to rotate the crankshaft 11 in the reverse rotation direction, and when the rotation speed detected by the rotation speed detection unit 42 exceeds a predetermined rotation speed, The torque transmitted from 20 to the crankshaft 11 is made lower than the current torque. Specifically, in the fourth embodiment, the process of S27 of FIG. 11 is executed instead of the process of S25 of FIG. Other processes in FIG. 11 are the same as the processes in FIG. This series of processing is executed by the ECU 30. The description of the same processes as those in FIG. 9 will be omitted by retaining the same step numbers.

  As shown in FIG. 11, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether or not the rotation speed of the motor 20 is equal to or higher than a predetermined rotation speed (S27). Specifically, it is determined whether or not the rotation speed of the rotating shaft 21 detected by the rotation speed detection unit 42 is equal to or higher than a predetermined rotation speed.

  If it is determined in S27 that the rotation speed of the motor 20 is equal to or higher than the predetermined rotation speed (S27: YES), the torque command value for driving the motor 20 is reduced from the current torque command value (S26). . Then, the process is executed again from the process of S14B.

  On the other hand, if it is determined in S27 that the rotation speed of the motor 20 is not higher than the predetermined rotation speed (S27: NO), it is determined whether the crankshaft 11 has rotated (S31). The processes after S31 are the same as those in FIG.

  The present embodiment described above has the following advantages. Here, only advantages different from the fourth embodiment will be described.

  The rotation speed of the motor 20 is detected by the rotation speed detection unit 42. Then, the ECU 30 causes the motor 20 to rotate the crankshaft 11 in the reverse rotation direction, and transmits the rotation from the motor 20 to the crankshaft 11 when the rotation speed detected by the rotation speed detection unit 42 exceeds a predetermined rotation speed. Reduce the torque below the current torque. Therefore, when the crankshaft 11 and the motor 20 are disconnected by the one-way clutch 22, the torque transmitted from the motor 20 to the crankshaft 11 is reduced, and the crankshaft 11 is rotated in the reverse direction to the target rotation position. Can be done.

(Sixth embodiment)
Hereinafter, a sixth embodiment in which the motor 20 is switched to the forward rotation drive when the one-way clutch 22 is in the disengaged state will be described with reference to FIG. Note that the same parts as those in the first to fifth embodiments are denoted by the same reference numerals, and description thereof will be omitted.

  In the repositioning control of the present embodiment, the ECU 30 proceeds to No. 1 in FIG. 6 instead of the process of S26 in FIG. 11 in the fifth embodiment. The other processes in FIG. 12 are the same as the processes in FIG. This series of processing is executed by the ECU 30. The description of the same processing as in FIG. 11 is omitted by assigning the same step numbers.

  As shown in FIG. 12, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether or not the rotation speed of the motor 20 is equal to or higher than a predetermined rotation speed (S27). In this determination, when it is determined that the rotation speed of the motor 20 is equal to or higher than the predetermined rotation speed (S27: YES), the process proceeds to No. 1 in FIG. Then, the processing is executed again from the processing of S14A of FIG.

  On the other hand, if it is determined in S27 that the rotation speed of the motor 20 is not higher than the predetermined rotation speed (S27: NO), it is determined whether the crankshaft 11 has rotated (S31). The processes after S31 are the same as those in FIG.

  The present embodiment described above has the following advantages. Here, only the advantages different from the fifth embodiment will be described.

  The ECU 30 causes the motor 20 to rotate the crankshaft 11 in the reverse rotation direction, and when the rotation speed detected by the rotation speed detection unit 42 exceeds a predetermined rotation speed, the motor 20 causes the crankshaft 11 to rotate in the normal rotation direction. Rotate to stop at target rotation position. Therefore, when the one-way clutch 22 disconnects the crankshaft 11 and the motor 20, the crankshaft 11 can be stopped by rotating the crankshaft 11 to the target rotation position in the normal rotation direction.

(Seventh embodiment)
FIG. 13 illustrates a seventh embodiment in which the drive torque of the motor 20 is reduced when the one-way clutch 22 is in the disengaged state, and the motor 20 is switched to the normal rotation drive when the one-way clutch 22 is repeated a specified number of times or more. It will be described with reference to FIG. The same parts as those in the first to sixth embodiments are denoted by the same reference numerals, and description thereof will be omitted.

  Even if the crankshaft 11 and the motor 20 are disconnected by the one-way clutch 22, the torque transmitted from the motor 20 to the crankshaft 11 is made lower than the current torque, thereby rotating the crankshaft 11 in the reverse direction. May be able to.

  Thus, in the repositioning control of the present embodiment, the ECU 30 determines that the motor 20 rotates the crankshaft 11 in the reverse direction and that the rotation speed detected by the rotation speed detection unit 42 exceeds a predetermined rotation speed. The motor 20 rotates the crankshaft 11 in the normal rotation direction and stops at the target rotation position on condition that the number of occurrences exceeds the number of times. Specifically, the processing of FIG. 13 is executed instead of the processing of FIG. 11 of the fifth embodiment. This series of processing is executed by the ECU 30. The description of the same processing as in FIG. 11 is omitted by assigning the same step numbers.

  As shown in FIG. 13, the motor 20 is driven to rotate in the reverse direction (S14B), and it is determined whether or not the number of idling of the motor 20 is equal to or more than a specified number (S24). Specifically, it is considered that the one-way clutch 22 is in the disengaged state as idling of the motor 20, and it is determined whether or not the number of times is equal to or more than a specified number. The specified number of times is the number of attempts to rotate the crankshaft 11 in the reverse direction, and is set to, for example, three times.

  If it is determined in S24 that the number of idling of the motor 20 is equal to or greater than the specified number (S24: YES), the process proceeds to No. 1 in FIG. Then, the processing is executed again from the processing of S14A of FIG.

  On the other hand, if it is determined in S24 that the number of times of idling of the motor 20 is not equal to or more than the specified number of times (S24: NO), it is determined whether the rotation speed of the motor 20 is equal to or more than a predetermined rotation speed (S27). In the determination of S27, when it is determined that the rotation speed of the motor 20 is equal to or higher than the predetermined rotation speed (S27: YES), 1 is added to the number of idling of the motor (S28), and the torque command value for driving the motor 20 is reduced. It is decreased from the current torque command value (S26). Note that the initial value of the number of idling of the motor is 0. Then, the process is executed again from the process of S14B.

  On the other hand, if it is determined in S27 that the rotation speed of the motor 20 is not higher than the predetermined rotation speed (S27: NO), it is determined whether the crankshaft 11 has rotated (S31). The processes after S31 are the same as those in FIG.

  The present embodiment described above has the following advantages. Here, only the advantages different from the fifth embodiment will be described.

  The ECU 30 controls the motor 20 to rotate the crankshaft 11 in the reverse rotation direction by the motor 20 and the rotation speed detected by the rotation speed detection unit 42 to exceed a predetermined rotation speed on the condition that the number of occurrences is equal to or more than a specified number of times. By means of 20, the crankshaft 11 is rotated in the normal rotation direction and stopped at the target rotation position. Therefore, the motor 20 is caused to repeatedly rotate the crankshaft 11 in the reverse direction up to the specified number of times, and if the crankshaft 11 cannot be rotated in the reverse direction even after the specified number of times, the crankshaft 11 is rotated. It is rotated in the forward direction. Therefore, the crankshaft 11 can be surely rotated to the target rotation position and stopped, while the rotation direction of the crankshaft 11 is properly used in the normal rotation direction and the reverse rotation direction.

  Note that the process of S26 in FIG. 13 may be omitted, and simply rotating the crankshaft 11 in the reverse direction by the motor 20 may be repeated up to a specified number of times.

  Further, the first to third embodiments can be modified and implemented as follows.

  As shown in FIG. 14, a rotation speed detection unit 42 that detects the rotation speed of the motor 20 is provided as a rotation position detection unit that detects the rotation position of the crankshaft 11, and the motor 20 detected by the rotation speed detection unit 42. The rotational position of the crankshaft 11 may be calculated (estimated) based on the rotational speed of.

  According to the above configuration, the rotation speed of the motor 20 is detected by the rotation speed detection unit 42. Then, the rotation position of the crankshaft 11 is calculated by the ECU 30 based on the rotation speed detected by the rotation speed detection unit 42. Therefore, the rotation speed detection unit 42 that detects the rotation speed of the motor 20 can be used as a rotation position detection unit that detects the rotation position of the crankshaft 11. Therefore, as shown by the dashed line, the wiring can be simplified as compared with a configuration in which a signal of the rotational position of the crankshaft 11 is transmitted from the rotation speed detecting unit 42 and the crank angle sensor 41 provided separately from the crank angle sensor 41 by wiring. . This is particularly effective when the ECU 30 is not the ECU that controls the engine 10.

  As shown in FIG. 15, a generator motor 60 (MG: Motor Generator) may be employed instead of the motor 20 of FIG. The MG 60 (corresponding to a rotating electric machine) has a power generation function of generating power by the driving force of the crankshaft 11 and a powering function of rotating the crankshaft 11. Further, the vehicle may be a vehicle that stops the engine 10 and travels (EV traveling) using the MG 60. In a vehicle that performs EV traveling, the crankshaft 11 is likely to rotate due to vibration of the vehicle during EC traveling after the engine 10 is stopped.

  In this regard, even after the engine 10 is stopped, even if the crankshaft 11 rotates due to vibration of the vehicle during EV running, the crankshaft 11 can be rotated again to the target rotation position and stopped. As a result, even if the vehicle runs while the operation of the engine 10 is stopped, the start time of the engine 10 can be reduced.

  As shown in FIG. 16, a motor 70 (starter) for rotating the crankshaft 11 of the engine 10 may be provided separately from the MG 60. When the engine 10 is started for the first time, the engine 10 may be started by the motor 70, and when the engine 10 is restarted, the engine 10 may be started by the MG 60.

  Further, each of the above embodiments can be modified and implemented as follows.

  When the motor 20 is locked while the motor 20 is being driven, the current flowing through the motor 20 is larger than when the motor 20 is rotated. For this reason, in the processing of S31 in each drawing, it can be determined whether or not the crankshaft 11 has rotated based on the magnitude of the current flowing through the motor 20 while the motor 20 is driving. When the rotation speed detection unit 42 is provided, the rotation position of the crankshaft 11 is calculated based on the rotation speed detected by the rotation speed detection unit 42, and the calculated rotation speed before and after driving the motor 20 is calculated. It may be determined whether or not the angle has changed.

  In the processing of S11 in FIG. 2, when the crankshaft 11 is rotated to the target rotation position and stopped, the motor 20 may be driven from a state in which the crankshaft 11 is still rotating, or the crankshaft 11 The motor 20 may be driven after the rotation stops.

  The ECU 30 may stop the rotation of the crankshaft 11 after the rotation of the crankshaft 11 is stopped due to the positional shift, when the ECU 30 detects that the motor 20 has shifted. Further, the ECU 30 (corresponding to the target position maintaining unit) may rotate the crankshaft 11 immediately to the target rotation position and stop when the positional deviation is detected. According to such a configuration, the rotational position of the crankshaft 11 can be substantially maintained at the target rotational position, and the starting time of the engine 10 can be reduced.

  DESCRIPTION OF SYMBOLS 10 ... Engine, 11 ... Crankshaft, 20 ... Motor, 30 ... ECU, 41 ... Crank angle sensor, 42 ... Rotation speed detection part, 60 ... Generator motor.

Claims (8)

An engine starter for starting an engine (10) that generates a driving force by burning fuel,
A rotating electric machine (20, 60) for rotating an output shaft (11) of the engine;
A rotation position detector (41, 42) for detecting a rotation position of the output shaft;
After the operation of the engine is stopped, based on the rotation position detected by the rotation position detection unit, the output shaft is rotated by the rotating electric machine to a target rotation position set for starting the engine, and then stopped. A first positioning portion (30) to be
A position where the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit after the output shaft is stopped at the target rotation position by the first positioning unit. A position shift detector (30) for detecting that a shift has occurred,
When the displacement is detected by the displacement detection unit, the output shaft is rotated by the rotating electric machine to the target rotation position based on the rotation position detected by the rotation position detection unit. A second positioning portion (30) for stopping the operation;
Equipped with a,
An output shaft that rotates between the output shaft and the rotary electric machine when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotary electric machine exceeds a predetermined torque; A directional clutch (22) is provided,
The engine starting device, wherein the second positioning section sets a torque transmitted from the rotating electric machine to the output shaft to be smaller than the predetermined torque when the rotating electric machine rotates the output shaft in a reverse rotation direction . An engine starter for starting an engine (10) that generates a driving force by burning fuel,
A rotating electric machine (20, 60) for rotating an output shaft (11) of the engine;
A rotation position detector (41, 42) for detecting a rotation position of the output shaft;
After the operation of the engine is stopped, based on the rotation position detected by the rotation position detection unit, the output shaft is rotated by the rotating electric machine to a target rotation position set for starting the engine, and then stopped. A first positioning portion (30) to be
A position where the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit after the output shaft is stopped at the target rotation position by the first positioning unit. A position shift detector (30) for detecting that a shift has occurred,
When the displacement is detected by the displacement detection unit, the output shaft is rotated by the rotating electric machine to the target rotation position based on the rotation position detected by the rotation position detection unit. A second positioning portion (30) for stopping the operation;
With
An output shaft that rotates between the output shaft and the rotary electric machine when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotary electric machine exceeds a predetermined torque; Directional clutch is provided,
A rotation speed detection unit (42) for detecting a rotation speed of the rotating electric machine;
The second positioning unit rotates the output shaft in the reverse direction by the rotating electric machine, and when the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed, the output from the rotating electric machine. It is lower than the current torque torque transmitted to the shaft Rue engine starting device. An engine starter for starting an engine (10) that generates a driving force by burning fuel,
A rotating electric machine (20, 60) for rotating an output shaft (11) of the engine;
A rotation position detector (41, 42) for detecting a rotation position of the output shaft;
After the operation of the engine is stopped, based on the rotation position detected by the rotation position detection unit, the output shaft is rotated by the rotating electric machine to a target rotation position set for starting the engine, and then stopped. A first positioning portion (30) to be
A position where the rotation position of the output shaft deviates from the target rotation position based on the rotation position detected by the rotation position detection unit after the output shaft is stopped at the target rotation position by the first positioning unit. A position shift detector (30) for detecting that a shift has occurred,
When the displacement is detected by the displacement detection unit, the output shaft is rotated by the rotating electric machine to the target rotation position based on the rotation position detected by the rotation position detection unit. A second positioning portion (30) for stopping the operation;
With
An output shaft that rotates between the output shaft and the rotary electric machine when the torque transmitted from the output shaft rotating in the normal rotation direction to the rotary electric machine exceeds a predetermined torque; Directional clutch is provided,
A rotation speed detection unit that detects a rotation speed of the rotating electric machine,
The second positioning unit rotates the output shaft in a reverse rotation direction by the rotating electric machine, and when the rotation speed detected by the rotation speed detection unit exceeds a predetermined rotation speed, the output by the rotating electric machine. axis is stopped at the target rotational position by rotating in the normal direction to Rue engine starting device. The second positioning unit rotates the output shaft in the reverse rotation direction by the rotating electric machine, and the rotation speed detected by the rotation speed detection unit has exceeded a predetermined rotation speed, which has occurred a specified number of times or more. Subject to the engine starting device according to claim 2 or 3 is stopped at the target rotational position by rotating the output shaft in the forward direction by the rotary electric machine. The second positioning unit is configured such that, when the misalignment is detected by the misalignment detection unit, the rotation angle from the rotation position detected by the rotation position detection unit to the target rotation position is the largest. The engine starting device according to any one of claims 1 to 4, wherein the output shaft is rotated by the rotating electric machine in the minimum rotation direction that becomes smaller and stopped at the target rotation position. A plurality of the target rotation positions are set during one rotation of the output shaft,
The second positioning unit, when the misalignment is detected by the misalignment detection unit, rotates the minimum rotation to the target rotation position closest to the rotation position detected by the rotation position detection unit. The engine starting device according to any one of claims 1 to 4, wherein the output shaft is rotated by the rotating electric machine in a minimum rotation direction approaching at an angle and stopped at the closest target rotation position. The second positioning portion, when it is determined that the output shaft does not rotate when rotating the output shaft in the minimum rotation direction by the rotating electric machine, the output shaft is opposite to the minimum rotation direction by the rotating electric machine. engine starting apparatus according to claim 5 or 6 is stopped at the target rotational position by rotating in the direction. An engine starting device according to any one of claims 1 to 7 ,
And the engine;
A vehicle that travels while the operation of the engine is stopped.

Images