WO2018142578A1

WO2018142578A1 - Drive control system and method for controlling drive control system

Info

Publication number: WO2018142578A1
Application number: PCT/JP2017/003976
Authority: WO
Inventors: 真次河住; 真吾大崎; 賢斗松元
Original assignee: 新電元工業株式会社
Priority date: 2017-02-03
Filing date: 2017-02-03
Publication date: 2018-08-09
Also published as: JP6430654B1; JPWO2018142578A1

Abstract

According to the present invention, a control unit of a drive control system, by driving a motor after power is turned on, causes an internal combustion engine to rotate by imparting thereto a standard torque that exceeds a second top dead center between an exhaust stroke and an intake stroke of the internal combustion engine and that does not exceed a first top dead center between a compression stroke and a combustion stroke of the internal combustion engine, and, after having imparted the standard torque by driving the motor, detects a standard position corresponding to the top dead center of the internal combustion engine on the basis of U-, V-, and W-phase detection signals respectively outputted by U-, V-, and W-phase sensor elements, in accordance with the rotation of the motor and also on the basis of pulse information including a pulse wave outputted by a pickup coil in accordance with the rotation of the motor.

Description

Drive control system and drive control system control method

The present invention relates to a drive control system and a control method for the drive control system.

Conventionally, as a control unit (ECU) of a drive control system that controls driving of a 4-stroke internal combustion engine (engine), a driver circuit is controlled based on changes in the top dead center and rotation angle of the internal combustion engine detected by a sensor. And what drives a motor is known. At the time of turning on the power of the control unit (ECU) of this conventional drive control system, since the information about the stroke (rotation angle) of the stopped internal combustion engine is not held, at the time of turning on the power, before the motor start control, It is necessary to determine the stroke of the internal combustion engine.

Here, in the conventional drive control system described in Japanese Patent No. 5097654, when the power is turned on, the motor is rotated and based on the four detection signals obtained from the four sensor elements (Hall ICs), The reference position corresponding to the dead point is detected.

In other words, the above-described conventional technique corresponds to the top dead center of the internal combustion engine based on the three detection signals obtained from the three sensor elements and the pulse information output from the pickup coil when the motor is turned on. The reference position to be detected was not detected.

Therefore, in the present invention, when the power is turned on, the reference position corresponding to the top dead center of the internal combustion engine is detected based on the three detection signals obtained from the three sensor elements and the pulse information output from the pickup coil. It is an object of the present invention to provide a drive control system that can be used.

In the drive control system according to one aspect of the present invention,
A drive control system for controlling the drive of a four-stroke internal combustion engine,
A motor for applying torque to the internal combustion engine;
U-phase, V-phase, and W-phase sensor elements that output U-phase, V-phase, and W-phase detection signals corresponding to respective switching of magnetic fluxes of the U-phase, V-phase, and W-phase coils of the motor; A relucter provided on the rotor of the motor and having two edges in the rotation direction of the motor, and a pulse wave of the first polarity is output when the rising edge of the edge of the reluctor is detected and the falling edge of the reluctor edge A pickup coil that outputs a pulse wave of the second polarity upon detecting the passage of
A driver circuit for controlling the operation of a motor for applying torque to the internal combustion engine;
A controller that controls the driver circuit to drive the motor based on a change in top dead center and rotation angle of the internal combustion engine detected by the sensor, and
The controller is
After the power is turned on, the motor is driven to exceed a second top dead center between the exhaust stroke and the intake stroke of the internal combustion engine and between the compression stroke and the combustion stroke of the internal combustion engine. A reference torque that does not exceed the first top dead center is applied to the internal combustion engine to rotate the internal combustion engine,
After driving the motor and applying the reference torque to the internal combustion engine, the U-phase, V-phase, and W-phase output by the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor A reference position corresponding to a top dead center of the internal combustion engine is detected based on a detection signal and pulse information including the pulse wave output from the pickup coil according to rotation of the motor.

In the drive control system,
The controller is
After the power is turned on, the reference torque is applied to the internal combustion engine to rotate the internal combustion engine in a normal direction by driving the motor forward.
Corresponding to the top dead center of the internal combustion engine based on the U-phase, V-phase, and W-phase detection signals and the pulse information after driving the motor forward and applying the reference torque to the internal combustion engine It is characterized by detecting the reference position.

In the drive control system,
The reluctator is detected next to the first edge detected by the pickup coil when the motor is rotated forward, and next to the first edge when the motor is rotated forward. A second edge,
The first edge is provided at a position detected by the pickup coil when the rotation angle of the internal combustion engine is at a first detection angle between a natural stop position and top dead center. And a detection angle of
The second edge is provided at a position detected by the pickup coil when the rotation angle of the internal combustion engine is at a second detection angle closer to the top dead center than the first detection angle, and It is related to the second detection angle.

In the drive control system,
The second detection angle is set to a top dead center of the internal combustion engine.

In the drive control system,
The natural stop position is a rotation angle of the internal combustion engine that is located when the internal combustion engine is naturally stopped in a state where no torque is applied from the motor.

In the drive control system,
The controller is
After the motor is driven forward and the reference torque is applied to the internal combustion engine, it is first determined whether or not the first pulse wave of the pulse information output from the pickup coil has the first polarity. And
If the first pulse wave has the first polarity, determine whether the motor is reversely rotated after the motor is driven forward,
When the motor is reversely rotated after the motor is driven to rotate forward, the first pulse wave is based on the first edge,
The second detection angle associated with the second edge is detected as the reference position corresponding to the first top dead center of the internal combustion engine.

In the drive control system,
The controller is
If the motor is not rotating in the reverse direction after the motor is driven forward, it is determined whether or not the pickup coil is outputting a second pulse wave next to the first pulse wave of the pulse information. And
When the pickup coil outputs the second pulse wave, the second pulse wave is based on the second edge, and the second pulse wave is associated with the second edge. A detection angle is detected as the reference position corresponding to the second top dead center of the internal combustion engine.

In the drive control system,
The controller is
When the pulse wave of the pulse information output from the pickup coil at first is not in the first polarity, it is determined whether or not the motor is reversely rotated after the motor is driven forward,
When the motor is rotating in the reverse direction after the motor is driven forward, the first pulse wave of the pulse information is based on the first edge,
The second detection angle associated with the second edge is detected as the reference position corresponding to the first top dead center of the internal combustion engine.

In the drive control system,
The controller is
It is determined whether or not the motor is reversely rotated after the motor is driven forward, and when the motor is not reversely rotated after the motor is driven forwardly, the first pulse wave of the pulse information is Is based on the second edge, and detects the second detection angle associated with the second edge as the reference position corresponding to the second top dead center of the internal combustion engine. Features.

In the drive control system,
The first edge is provided at a position detected by the pickup coil when the rotation angle of the internal combustion engine is in a compression stroke.

In the drive control system,
The drive control system is mounted on a motorcycle,
The motor is connected to the internal combustion engine of the motorcycle;
The control unit starts and / or drives the internal combustion engine by driving the motor by the driver circuit.

In the drive control system,
The controller is
Starting to apply torque from the motor to the internal combustion engine,
Start measuring the torque application time from the start of torque application to the internal combustion engine,
Determining whether or not the rotational speed of the internal combustion engine has reached a target value;
When it is determined that the rotational speed of the internal combustion engine has not reached the target value, it is determined whether the torque application time has passed a set time,
When it is determined that the rotational speed of the internal combustion engine has reached the target value and when it is determined that the torque application time has passed the set time, the application of torque from the motor to the internal combustion engine is stopped. Thus, forward drive control of the motor is executed.

In the drive control system,
The controller is configured to determine whether the motor is rotating forward or reversely based on changes in the U-phase, V-phase, and W-phase detection signals.

In the drive control system,
The controller is
After the power is turned on and before starting the internal combustion engine, the motor is rotated forward so that the reference torque is applied to the internal combustion engine to cause the internal combustion engine to rotate forward.
Corresponding to the top dead center of the internal combustion engine based on the U-phase, V-phase, and W-phase detection signals and the pulse information after driving the motor forward and applying the reference torque to the internal combustion engine To detect the reference position
When starting the internal combustion engine, the stroke of the internal combustion engine is determined based on the detected reference position while controlling the motor, and ignition of the internal combustion engine is controlled.

In the drive control method according to one aspect of the present invention,
A drive control system for controlling the drive of a four-stroke internal combustion engine according to each switching of a motor that applies torque to the internal combustion engine and a magnetic flux of a U-phase, V-phase, and W-phase coil of the motor U-phase, V-phase, and W-phase sensor elements that output U-phase, V-phase, and W-phase detection signals; a relucter that is provided in the rotor of the motor and has two edges in the rotation direction of the motor; A pickup coil that outputs a pulse wave of a first polarity when detecting the passage of a rising edge of a reluctator edge and outputs a pulse wave of a second polarity when detecting the passage of a trailing edge of the reluctator edge A driver circuit that controls the operation of a motor that applies torque to the internal combustion engine, and a top dead center and a rotation angle detected by the sensor Based on the change, a control method of a drive control system and a control unit which controls the driver circuit to drive the motor,
The controller is
After the power is turned on, the motor is driven to exceed a second top dead center between the exhaust stroke and the intake stroke of the internal combustion engine and between the compression stroke and the combustion stroke of the internal combustion engine. A reference torque that does not exceed the first top dead center is applied to the internal combustion engine to rotate the internal combustion engine,
After driving the motor and applying the reference torque to the internal combustion engine, the U-phase, V-phase, and W-phase output by the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor A reference position corresponding to a top dead center of the internal combustion engine is detected based on a detection signal and pulse information including the pulse wave output from the pickup coil according to rotation of the motor.

According to the vehicle power supply system of one aspect of the present invention, when the power is turned on, the top dead center of the internal combustion engine based on the three detection signals obtained from the three sensor elements and the pulse information output by the pickup coil Can be detected.

FIG. 1 is a diagram illustrating an example of a configuration of a drive control system 1000 according to the first embodiment which is an aspect of the present invention. FIG. 2 is a diagram illustrating an example of a detailed configuration of the drive control device 100 and the motor 102 illustrated in FIG. 1. FIG. 3 is a diagram showing an example of a detailed configuration of the motor 102 shown in FIG. FIG. 4 is a diagram showing an example of the relationship between each stroke (crank angle) of the internal combustion engine 103 of the drive control system 1000 shown in FIG. 1 and the pressure in the cylinder. FIG. 5 is a diagram showing an example (pattern 1) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. FIG. 6 is a diagram showing an example (pattern 2) of a relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. FIG. 7 is a diagram showing an example (pattern 3) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. In FIG. FIG. 8 is a diagram showing an example (pattern 4) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. In FIG. FIG. 9 is a flowchart showing an example of the flow of forward drive control of the motor 102 in order for the drive control apparatus 100 shown in FIGS. 1 and 2 to apply the reference torque to the internal combustion engine 103. FIG. 10 is a flowchart showing an example of a flow for the drive control device 100 shown in FIGS. 1 and 2 to detect a reference position corresponding to the top dead center of the internal combustion engine 103. FIG. 11 is a flowchart showing an example of the motor stage determination process shown in FIG. FIG. 12 is a flowchart illustrating an example of normal / reverse rotation determination processing illustrated in FIG. 10. FIG. 13 is a flowchart illustrating an example of the position determination process illustrated in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First embodiment

FIG. 1 is a diagram illustrating an example of a configuration of a drive control system 1000 according to the first embodiment which is an aspect of the present invention. FIG. 2 is a diagram illustrating an example of a detailed configuration of the drive control device 100 and the motor 102 illustrated in FIG. 1. FIG. 3 is a diagram showing an example of a detailed configuration of the motor 102 shown in FIG. FIG. 4 is a diagram showing an example of a relationship between each stroke (crank angle) of the internal combustion engine 103 of the drive control system 1000 shown in FIG. 1 and the pressure in the cylinder.

A drive control system 1000 that controls the drive of the internal combustion engine according to the present embodiment includes, for example, a drive control device (ECU: Engine Control Unit) 100, a battery B, and a motor 102, as shown in FIGS. The engine (internal combustion engine) 103 and the sensor 104 are provided.

The drive control system 1000 is mounted on, for example, a two-wheeled vehicle (not shown). In this case, the motor 102 is connected to the internal combustion engine 103 of the motorcycle.

Here, the internal combustion engine 103 is, for example, a 4-stroke engine. Therefore, as shown in FIG. 4, the state of the internal combustion engine 103 changes between an intake stroke, a compression stroke, a combustion stroke, and an exhaust stroke. Further, as shown in FIG. 4, the pressure in the cylinder of the internal combustion engine 103 (that is, the rotational load of the crank) becomes maximum at the top dead center.

The motor 102 applies torque to the internal combustion engine 103 (that is, the crankshaft of the internal combustion engine 103).

Here, the motor 102 is connected to the crankshaft of the internal combustion engine 103 so as to be able to transmit and receive torque. That is, the motor 102 has both functions of an electric motor and a generator. As described above, the motor 102 is driven by the internal combustion engine 103 to generate electric power, and also functions as an AC generator (ACG) that outputs an AC voltage.

The motor 102 includes, for example, a U-phase coil CU, a V-phase coil CV and a W-phase coil CW provided in the stator, and a rotor RO as shown in FIGS.

The sensor 104 detects the rotation speed (rpm) and crank angle (for example, change in rotation angle, top dead center) of the internal combustion engine 103, and outputs a detection signal corresponding to the detection result. .

In particular, the sensor 104 is configured such that the rotation angle of the internal combustion engine 103 is such that the second top dead center TDC2 (reference position) between the exhaust stroke and the intake stroke, and the first between the compression stroke and the combustion stroke. When passing through top dead center TDC1 (reference position), a reference position signal (pulse information SPC) is output as one of the detection signals.

2 and 3, for example, the sensor 104 includes a U-phase sensor element ICU, a V-phase sensor element ICV, and a W-phase sensor element ICW, a relaxor RE, and a pickup coil PC.

The U-phase, V-phase, and W-phase sensor elements ICU, ICV, ICW are U-phase detection signals IHU corresponding to the switching of the magnetic flux of the U-phase, V-phase, and W-phase coils CU, CV, CW of the motor 102, respectively. The V-phase detection signal IHV and the W-phase detection signal IHW are output.

The pickup coil PC outputs pulse waves P1 and P2 when it detects the passage of the edge of the reluctator RE.

For example, the pickup coil PC outputs a pulse wave having a first polarity (in this case, positive) when detecting the rising passage of the edge of the reluctor RE, and outputs the second wave when detecting the falling passage of the edge of the reluctor RE. Polarity (here negative) pulse waves are output.

The above passage means that, for example, the relaxor RE passes through a range where the pickup coil PC can detect an edge (in the vicinity of the pickup coil PC).

The reluctator RE is provided on the rotor RO of the motor 102 and has two edges E1 and E2 in the rotation direction of the motor 102 (forward rotation direction in FIG. 3).

That is, the reluctator RE has a first edge E1 first detected by the pickup coil PC when the motor 102 is rotated forward (FIG. 3), and a first edge detected by the pickup coil PC when the motor 102 is rotated forward. And a second edge E2 detected next to E1.

For example, the first edge E1 is provided at a position detected by the pickup coil PC when the rotation angle of the internal combustion engine 103 is at a first detection angle between the natural stop position and the top dead center.

In the present embodiment, the first edge E1 is provided at a position that is detected by the pickup coil PC when the rotation angle of the internal combustion engine 103 is in the compression stroke, for example.

And this 1st edge E1 is linked | related with this 1st detection angle by the control part CON. For example, the first edge E1 is stored in the storage unit M in association with the first detection angle.

The natural stop position is a rotation angle of the internal combustion engine 103 that is located when the internal combustion engine 103 is naturally stopped in a state where no torque is applied from the motor 102.

Further, for example, the second edge E2 is provided at a position detected by the pickup coil PC when the rotation angle of the internal combustion engine 103 is at a second detection angle closer to the top dead center than the first detection angle. It has been.

The second edge E2 is associated with the second detection angle by the control unit CON. For example, the second edge E2 is stored in the storage unit M in association with the second detection angle.

In the present embodiment, the second detection angle is set at the top dead center of the internal combustion engine 103, for example.

Further, as shown in FIGS. 1 and 2, the battery B supplies driving power to the motor 102 or charges regenerative power from the motor 103.

Further, the drive control device 100 determines the state of the motor 102 based on the detection signal (that is, the rotation speed and crank angle (for example, change in rotation angle, top dead center) of the motor 102 obtained from the detection signal). The driving of the internal combustion engine 103 is controlled.

The drive control device 100 includes, for example, a control unit (CPU: Central Processing Unit) CON, a storage unit M, and a driver circuit D.

Further, the driver circuit D is configured to control the operation of the motor 102 that applies torque to the internal combustion engine 103.

Further, the storage unit M is configured to store a map for controlling the start of the internal combustion engine 103 (for controlling the motor 102).

The control unit CON refers to the storage unit M and controls the driver circuit D based on the rotation speed and crank angle (for example, change in rotation angle, top dead center) of the internal combustion engine 103 detected by the sensor 104. The motor 102 is driven.

That is, the controller CON drives the internal combustion engine 103 and drives the internal combustion engine 103 by driving the motor 102 by the driver circuit D.

The controller CON drives the motor 102 (in this case, normal rotation driving) after the power is turned on and before starting (ignition control) of the internal combustion engine 103, so that the exhaust stroke and the intake stroke of the internal combustion engine 103 are driven. A reference torque is applied to the internal combustion engine 103 so as to exceed the second top dead center TDC2 between and the internal combustion engine 103 and not exceed the first top dead center TDC1 between the compression stroke and the combustion stroke of the internal combustion engine 103. The internal combustion engine 103 is rotated (forward rotation here).

The reference torque is set to a value that is greater than or equal to the rotational load (pressure) MAX2 at the second top dead center TDC2 of the internal combustion engine 103 and less than the rotational load (pressure) MAX1 at the first top dead center TDC1 of the internal combustion engine 103. Is done.

Then, the controller CON drives the motor 102 (here, forward rotation driving) to apply a reference torque to the internal combustion engine 103, and then controls the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor 102. Based on changes in the U-phase, V-phase, and W-phase detection signals IHU, IHV, and IHW output from the ICU, ICV, and ICW, it is determined whether the motor 102 is rotating forward or reversely. It has become.

Further, the control unit CON drives the motor 102 (in this case, normal rotation driving) to apply a reference torque to the internal combustion engine 103, and then controls the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor 102. Based on changes in the U-phase, V-phase, and W-phase detection signals IHU, IHV, and IHW output from the ICU, ICV, and ICW, a motor stage, which will be described later, of the motor 102 is determined.

Further, the control unit CON drives the motor 102 (here, forward rotation driving) to apply the reference torque to the internal combustion engine 103, and then before starting the internal combustion engine 103, the U phase according to the rotation of the motor 102, V-phase and W-phase sensor elements ICU, ICV, ICW output U-phase, V-phase, and W-phase detection signals IHU, IHV, IHW, and pulse waves output from the pickup coil PC according to the rotation of the motor 102 A reference position corresponding to the top dead center of the internal combustion engine 103 is detected based on the included pulse information SPC.

Next, an example of a control method of the drive control system 1000 having the above configuration will be described. FIG. 5 is a diagram showing an example (pattern 1) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. FIG. 6 is a diagram showing an example (pattern 2) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. FIG. 7 is a diagram showing an example (pattern 3) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103. FIG. 8 is a diagram showing an example (pattern 4) of the relationship between each signal of the drive control system 1000 shown in FIGS. 1 and 2 and the rotational load of the internal combustion engine 103.

First, an example of a flow of forward drive control of the motor 102 in order for the drive control device 100 to apply the reference torque to the internal combustion engine 103 will be described. FIG. 9 is a flowchart showing an example of the flow of forward drive control of the motor 102 in order for the drive control apparatus 100 shown in FIGS. 1 and 2 to apply the reference torque to the internal combustion engine 103.

As shown in FIG. 9, first, the control unit CON of the drive control device 100 starts normal rotation drive control, and the internal combustion engine 103 starts from the motor 102 having the rotation shaft connected to the crankshaft of the internal combustion engine 103. The application of torque is started (step S1).

Next, the control unit CON starts measuring and counting the torque application time after starting to apply torque to the internal combustion engine 103 (step S2).

Then, the control unit CON determines whether or not the rotational speed of the internal combustion engine 103 detected by the sensor 104 has reached a target value (step S3).

Then, if the control unit CON determines that the rotational speed of the internal combustion engine 103 has not reached the target value in step S3, the control unit CON determines whether or not the torque application time has passed the set time (step). S4).

If the control unit CON determines in step S4 that the torque application time has not passed the set time, whether or not the rotational speed of the internal combustion engine 103 detected by the sensor 104 has reached the target value. It returns to step S3 which judges whether.

In this way, the above-mentioned reference torque that exceeds the second top dead center TDC2 between the exhaust stroke and the intake stroke and does not exceed the first top dead center TDC1 between the compression stroke and the combustion stroke. Is applied to the internal combustion engine 103 by forward drive control to cause the internal combustion engine 103 to rotate forward (FIGS. 5 to 8).

On the other hand, if the control unit CON determines that the rotational speed of the internal combustion engine 103 has reached the target value in step S3 and if it is determined in step S4 that the torque application time has passed the set time, the reference CON It is determined that torque has been applied to the internal combustion engine 103, and the forward rotation drive control is stopped, thereby stopping the application of torque from the motor 102 to the internal combustion engine 103 (step S5).

Next, an example of a flow for the drive control device 100 to detect a reference position corresponding to the top dead center of the internal combustion engine 103 will be described. FIG. 10 is a flowchart showing an example of a flow for the drive control device 100 shown in FIGS. 1 and 2 to detect a reference position corresponding to the top dead center of the internal combustion engine 103. FIG. 11 is a flowchart showing an example of the motor stage determination process shown in FIG. FIG. 12 is a flowchart showing an example of normal / reverse rotation determination processing shown in FIG. FIG. 13 is a flowchart illustrating an example of the position determination process illustrated in FIG.

As shown in FIG. 10, for example, when the ignition key is operated by the user, the drive control system 1000 is turned on and the drive control apparatus 100 is activated. At the time of turning on the power, the drive control device 100 does not have information regarding the stroke (rotation angle) of the stopped internal combustion engine. That is, before the internal combustion engine 103 is started (ignition control), the engine stage of the internal combustion engine 103 is in an undetermined state (step Sa).

After that, as shown in FIG. 10, the control unit CON of the drive control device 100 performs a forward rotation control of the motor 102 before the internal combustion engine 103 is started (ignition control). 2 is applied to the internal combustion engine 103 so that the internal combustion engine 103 does not exceed the top dead center TDC2 of 2 and does not exceed the first top dead center TDC1 between the compression stroke and the combustion stroke. Turn.

As shown in FIG. 10, when the control unit CON detects the edge of the W-phase detection signal IHW output from the W-phase sensor element ICW according to the rotation of the motor 102 (step Sb), the control unit CON Accordingly, when the edge of the V-phase detection signal IHV output from the V-phase sensor element ICV is detected (step Sc), and according to the rotation of the motor 102, the U-phase detection signal IHU output from the U-phase sensor element ICU If an edge is detected (step Sd), motor stage determination processing is executed (step Se).

Here, for example, as shown in FIGS. 5 to 8, the motor stage is determined by the combination of the “High” level and the “Low” level of the U-phase, V-phase, and W-phase detection signals IHU, IHV, and IHW. The motor stage is divided into “0” to motor stage “5”. In the example of FIGS. 5 to 8, one motor stage is 10 ° in the rotation angle of the internal combustion engine 103.

For example, when the motor 102 rotates in the forward direction, the motor stage is repeatedly changed in the order of the motor stages “0”, “1”, “2”, “3”, “4”, “5”. . On the other hand, when the motor 102 rotates in the reverse direction, the motor stage is repeatedly changed in the order of the motor stages “5”, “4”, “3”, “2”, “1”, “0”.

In this motor stage determination process, for example, as shown in FIG. 11, the controller CON controls the edges of the U-phase, V-phase, or W-phase detection signals IHU, IHV, and IHW (for example, the U-phase in FIGS. 5 to 8). When the falling edge of the detection signal IHU is detected, the current (current) motor stage value (for example, “1” when the motor 102 is rotating forward) is changed to the previous motor stage value (“1”). (Step Se1).

Then, the control unit CON starts from a level detected by the U-phase, V-phase, and W-phase detection signals IHU, IHV, IHW (for example, “High” level, “High” level, “Low” level) from a new motor stage ( "2") is determined (step Se2).

Then, the control unit CON updates the determined new motor stage (“2”) as the current motor stage (step Se3).

In this way, the controller CON drives the motor 102 (in this case, forward rotation driving) to apply the reference torque to the internal combustion engine 103, and then, according to the rotation of the motor 102, the U phase, V phase, and W The motor stage of the motor 102 is determined based on changes in the U-phase, V-phase, and W-phase detection signals IHU, IHV, and IHW output by the phase sensor elements ICU, ICV, and ICW.

And as shown in FIG. 10, after performing this motor stage determination process (step Se), the control part CON performs a motor stage determination process (step Sf).

In this motor stage determination process (step Sf), for example, as shown in FIG. 12, first, the control unit CON acquires the previous motor stage value (step Sf1).

And the control part CON acquires the value of this time (present) motor stage (step Sf2).

Then, the control unit CON determines whether or not the current motor stage value is larger than the previous motor stage value (step Sf3).

That is, whether the value of the motor stage is changing in the order of “0”, “1”, “2”, “3”, “4”, “5” (whether the motor 102 is rotating forward), Judging. If the value of the motor stage is greater than the value of the previous motor stage, the value of the motor stage changes in the order of “0” to “5” (when the motor 102 is reversed). In this case, the determination is made in the following steps Sf4 and Sf7.

When the previous motor stage value is smaller than the current motor stage value (YES in step Sf3), the control unit CON sets the previous motor stage value to “0” and the current motor stage value to “5”. Is determined (step Sf4).

That is, the control unit CON determines whether or not the previous motor stage value is smaller than the current motor stage value and the motor stage value changes in the order of “0” to “5”. .

Then, if the previous motor stage value is “0” and the current motor stage value is “5” (YES in step Sf4), the control unit CON determines that the motor 102 is rotating in reverse. (Step Sf5).

That is, the controller CON determines that the motor stage value is smaller than the current motor stage value and the motor stage value changes in the order of “0” to “5”. It is determined that 102 is reversed.

In addition, when the previous motor stage value is “0” and the current motor stage value is not “5” (NO in step Sf4), the control unit CON performs the normal rotation of the motor 102. (Step Sf6).

That is, the controller CON determines that the motor stage value is smaller than the current motor stage value and the motor stage value changes in the order of “5” to “0”. It is determined that 102 is rotating forward.

On the other hand, if the value of the previous motor stage is not smaller than the value of the current motor stage (NO in step Sf3), the control unit CON sets the previous motor stage value to “5” and the current motor stage value to “0”. Is determined (step Sf7).

That is, the control unit CON determines whether or not the previous motor stage value is larger than the current motor stage value and the motor stage value changes in the order of “5” to “0”. .

Then, the controller CON determines that the motor 102 is rotating forward when the previous motor stage value is “5” and the current motor stage value is “0” (YES in step Sf7). (Step Sf8).

That is, the control unit CON determines that the motor stage value is larger than the current motor stage value and the motor stage value changes in the order of “5” to “0”. It is determined that 102 is rotating forward.

In addition, when the previous motor stage value is “5” and the current motor stage value is not “0” (NO in step Sf7), the control unit CON reverses the motor 102. (Step Sf9).

That is, the control unit CON determines that the motor stage value is larger than the current motor stage value and the motor stage value changes in the order of “0” to “5”. It is determined that 102 is reversed.

As described above, the control unit CON drives the motor 102 (in this case, forward rotation driving) to apply the reference torque to the internal combustion engine 103, and then, according to the rotation of the motor 102, the U phase, the V phase, and the W phase. Based on changes in U-phase, V-phase, and W-phase detection signals IHU, IHV, and IHW output from sensor elements ICU, ICV, and ICW, it is determined whether motor 102 is rotating forward or reversely. To do.

Then, as shown in FIG. 10, the control unit CON executes the forward / reverse rotation determination process (step Sf) and then executes the position detection process (step Sg).

In this position detection process (step Sg), for example, as shown in FIG. 13, for example, first, the control unit CON drives the motor 102 (in this case, forward rotation driving) to apply the reference torque to the internal combustion engine 103. After that, it is determined whether or not the first pulse wave P1 of the pulse information (pulse signal SPC) output from the pickup coil PC first has the first polarity (positive in this case) (step Sg1).

Then, when the first pulse wave P1 has the first polarity (YES in step Sg1), the control unit CON obtains the result obtained in the above-described forward / reverse rotation determination process (step Sf). Based on the above, it is determined whether or not the motor 102 is reversely rotated after the motor 102 is driven forward (step Sg2).

Then, when the motor 102 rotates in the reverse direction after the motor 102 is driven in the forward direction (YES in step Sg2), the control unit CON is configured so that the first pulse wave P1 is based on the first edge E1. It is determined that the value of the engine stage is “14” (step Sg3).

Here, for example, as shown in FIG. 5, when the internal combustion engine 103 is stopped at the rotation angle “a” of the compression stroke, if the motor 102 is driven forwardly to apply the reference torque to the internal combustion engine 103, the first The first pulse wave P1 having the first polarity (positive) is output from the pickup coil PC at the engine stage 14 before the top dead center TDC1. However, the internal combustion engine 103 does not exceed the first top dead center TDC1 but reverses at the rotation angle b, and the engine stage 13 outputs the second pulse wave P2 of the second polarity (negative) from the pickup coil PC. (Pattern 1 of pulse information SPC).

Since the internal combustion engine 103 is reversed without exceeding the first top dead center TDC1 by the above steps Sg1 to Sg3, it is determined that the pulse information SPC is the pattern 1 in FIG. It can be seen that the pulse wave P1 is based on the first edge E1 (rising edge). Note that the second pulse wave P2 is also based on the first edge E1 (falling).

The distance between the first edge E1 and the second edge E2 and the relationship between the first edge E1, the second edge E2, and the rotation angle of the internal combustion engine 103 are known. That is, it can be seen that the internal combustion engine 103 is positioned on the engine stage 14 before the first top dead center TDC1 (the first edge E1 is positioned between the engine stages 13 and 14).

Thus, in the state shown in FIG. 5, the control unit CON detects the second detection angle associated with the second edge E2 as the reference position corresponding to the first top dead center TDC1 of the internal combustion engine 103.

On the other hand, when the motor 102 does not reversely rotate after the motor 102 is driven to rotate forward (NO in step Sg2), the control unit CON causes the pickup coil PC to follow the first pulse wave P1 of the pulse information SPC. It is determined whether or not the second pulse wave P2 is output (step Sg4).

Then, when the pickup coil PC outputs the second pulse wave P2 (in the case of YES at step Sg4), the controller CON determines that the second pulse wave P2 is based on the second edge E2. Then, it is determined that the value of the engine stage is “3” (step Sg5).

Here, for example, as shown in FIG. 6, when the internal combustion engine 103 is stopped at the rotation angle c of the combustion stroke, if the motor 102 is driven forward to apply a reference torque to the internal combustion engine 103, the second In the engine stage 2 before the top dead center TDC2, the first pulse wave P1 having the first polarity (positive) is output from the pickup coil PC. Further, since the internal combustion engine 103 exceeds the second top dead center TDC2, the engine stage 3 outputs the second pulse wave P2 having the second polarity (negative) from the pickup coil PC (pulse information). SPC pattern 2).

Then, by the above steps Sg1, Sg2, Sg4, and Sg5, since the internal combustion engine 103 has rotated forward beyond the second top dead center TDC2, it is determined that the pulse information SPC is the pattern 2 in FIG. Therefore, it can be seen that the first pulse wave P1 is based on the first edge E1 (rising edge), and the second pulse wave P2 is based on the second edge E2 (falling edge).

As described above, the distance between the first edge E1 and the second edge E2 and the relationship between the first edge E1, the second edge E2, and the rotation angle of the internal combustion engine 103 are known. It is. That is, it can be seen that the internal combustion engine 103 is positioned on the engine stage 3 before the second top dead center TDC2 (the second edge E2 is positioned between the engine stages 3).

Thereby, in the state shown in FIG. 6, the control unit CON detects the second detection angle associated with the second edge E2 as the reference position corresponding to the second top dead center TDC2 of the internal combustion engine 103.

When the pickup coil PC does not output the second pulse wave P2 (in the case of NO in step Sg4), the controller CON reversely rotates the motor 102 or outputs the second edge E2. Since it cannot be determined whether the pattern 1 or the pattern 2 is already described, for example, the value of the engine stage is provisionally determined to be “14” (step Sg6).

On the other hand, when the pulse wave of the pulse information SPC output from the pickup coil PC first is not the first polarity (the second polarity) (in the case of NO in step Sg1), the control unit CON first sets the motor 102. It is determined whether or not the motor 102 is rotating in the reverse direction after driving forward (step Sg7).

When the motor 102 rotates in the reverse direction after the motor 102 is driven to rotate forward (YES in step Sg7), the control unit CON determines that the first pulse wave P1 of the pulse information SPC has the first edge. Based on E1, it is determined that the value of the engine stage is “13” (step Sg8).

Here, for example, as shown in FIG. 7, when the internal combustion engine 103 is stopped at the rotation angle d of the compression stroke, the internal combustion engine 103 is driven when the motor 102 is driven to rotate forward to apply the reference torque to the internal combustion engine 103. Is reversed at the rotation angle d without exceeding the first top dead center TDC1, and the engine stage 13 outputs the first pulse wave P1 having the second polarity (negative) from the pickup coil PC. (Pattern 3 of pulse information SPC)

Since the internal combustion engine 103 is reversed without exceeding the first top dead center TDC1 by the steps Sg1, Sg7, Sg8, it is determined that the pulse information SPC is the pattern 3 in FIG. It can be seen that the first pulse wave P1 is based on the first edge E1 (falling).

As described above, the distance between the first edge E1 and the second edge E2 and the relationship between the first edge E1, the second edge E2, and the rotation angle of the internal combustion engine 103 are known. It is. That is, it can be seen that the internal combustion engine 103 is positioned on the engine stage 13 before the first top dead center TDC1 (the first edge E1 is positioned between the engine stages 13 and 14).

Thus, in the state shown in FIG. 7, the control unit CON detects the second detection angle associated with the second edge E2 as the reference position corresponding to the first top dead center TDC1 of the internal combustion engine 103.

In addition, when the motor 102 does not reversely rotate after the motor 102 is normally driven (NO in step Sg7), the control unit CON determines that the first pulse wave P1 of the pulse information SPC is the second edge E2. Is determined to be “3” (step Sg9).

Here, for example, as shown in FIG. 8, when the internal combustion engine 103 is stopped at the rotation angle e of the exhaust stroke, when the motor 102 is driven in the forward direction to apply the reference torque to the internal combustion engine 103, the internal combustion engine 103 Exceeds the second top dead center TDC2, the engine stage 3 outputs the first pulse wave P1 having the second polarity (negative) from the pickup coil PC (Pattern 4 of the pulse information SPC). .

Since the internal combustion engine 103 has rotated forward beyond the second top dead center TDC2 by the above steps Sg1, Sg7, Sg9, it is determined that this pulse information SPC is the pattern 4 in FIG. It can be seen that the first pulse wave P1 is based on the second edge E2 (falling).

Thus, in the state shown in FIG. 8, the control unit CON detects the second detection angle associated with the second edge E2 as the reference position corresponding to the second top dead center TDC2 of the internal combustion engine 103.

And as shown in FIG. 10, after performing this position detection process (step Sg), the control part CON judges whether the engine stage in which the internal combustion engine 103 is located is decided (step Sg).

When the engine stage where the internal combustion engine 103 is located is determined, the control unit CON ends the process. On the other hand, when the engine stage where the internal combustion engine 103 is located is not determined, the control unit CON performs step Sa. Returning to FIG.

5 to 8 described above, one of the 24 engine stages 00 to 23 corresponding to the four strokes of the four-stroke engine corresponds to a rotation angle of 30 degrees of the internal combustion engine 103. To do. However, the rotation angle corresponding to one stage of the engine stage is not limited to 30 degrees, and may be other angles such as 10 degrees and 15 degrees.

In the control method executed by the drive control device 100 through the above steps, the control unit CON drives the motor 102 in the normal direction after the power is turned on and before starting the internal combustion engine 103, thereby supplying the reference torque to the internal combustion engine 103. After that, based on the U-phase, V-phase, and W-phase detection signals and pulse information, the reference position corresponding to the top dead center of the internal combustion engine (that is, the rotation angle (engine stage) of the internal combustion engine 103 and the reluctator) RE (relationship with the position of the second edge E2)) is detected.

Then, when the internal combustion engine 103 is started, the control unit CON controls the motor 102, determines the stroke of the internal combustion engine 103 based on the detected reference position, and controls ignition of the internal combustion engine 103. Then, the internal combustion engine 103 is driven.

As described above, the drive control system 1000 according to an aspect of the present invention is a drive control system that controls the drive of a four-stroke internal combustion engine, and includes the motor 102 that applies torque to the internal combustion engine, and the U phase of the motor. U phase, V phase, and W phase that output U phase, V phase, and W phase detection signals IHU, IHV, IHW according to the switching of magnetic flux of coils CU, CV, CW When the sensor element ICU, ICV, ICW and the rotor RO of the motor are detected to detect the passing of the rising edge of the reluctator RE and two edges in the rotational direction of the motor, the first polarity pulse wave A detection sensor 1 including a pickup coil PC that outputs and outputs a pulse wave of the second polarity when the falling edge of the reluctator RE is detected. 4, a driver circuit D that controls the operation of the motor that applies torque to the internal combustion engine, and a driver circuit that controls the motor based on changes in the top dead center and the rotation angle detected by the detection sensor And a control unit CON to be driven.

Then, after the power is turned on, the control unit rotates the motor in the forward direction so as to exceed the second top dead center TDC2 between the exhaust stroke and the intake stroke of the internal combustion engine 103 and to compress the internal combustion engine 103. A reference torque that does not exceed the first top dead center TDC1 between the stroke and the combustion stroke is applied to the internal combustion engine to cause the internal combustion engine to rotate forward, and the motor is driven to rotate forward to drive the reference torque to the internal combustion engine 103. Of the U-phase, V-phase, and W-phase sensor elements output from the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor, and the pulse wave that is output from the pickup coil according to the rotation of the motor. Based on the pulse information SPC, a reference position corresponding to the first or second top dead center TDC1, TDC2 of the internal combustion engine is detected.

As described above, in the drive control device of the present invention, as the configuration for detecting the stroke of the internal combustion engine, the three Hall ICs that output the U-phase, V-phase, and W-phase detection signals and the pulse information SPC are output. When the power is turned on when starting the internal combustion engine, the motor is rotated with a torque that does not exceed the first top dead center TDC1 between the exhaust stroke and the intake stroke of the internal combustion engine. The reference position corresponding to the top dead center is detected based on the U-phase, V-phase, and W-phase detection signals IHU, IHV, IHW and pulse information (pulse signal SPC) obtained by the above.

Thus, when the power is turned on, the reference position corresponding to the top dead center of the internal combustion engine can be detected based on the three detection signals obtained from the three sensor elements and the pulse information output from the pickup coil PC. it can.

In particular, when the power is turned on, the reference position corresponding to the top dead center of the internal combustion engine can be detected earlier, and the timing for specifying the stroke can be adjusted by adjusting the positions of the first and second edges of the reluctor RE.

Although FIG. 1 shows the case where the internal combustion engine 103 and the motor 102 are integrated, the internal combustion engine 103 and the motor 102 may be separated.

Further, in the embodiment, the case where the motor 102 has both functions of an electric motor and a generator is shown.

However, even if the motor 102 is connected so as to give torque to the crankshaft of the internal combustion engine 103 and has only the function of an electric motor, the operation and effect of the present invention can be achieved. In this case, a motor that functions as a generator is prepared separately.

In the embodiment, the above-described reference torque is applied to the internal combustion engine 103 to rotate the internal combustion engine 103 (forward rotation in this case). However, after the power is turned on, the control unit CON drives the motor 102 in the reverse direction, thereby exceeding the second top dead center TDC2 between the exhaust stroke and the intake stroke of the internal combustion engine 103 and the internal combustion engine 103. A reference torque that does not exceed the first top dead center TDC1 between the compression stroke and the combustion stroke may be applied to the internal combustion engine 103 to reverse the internal combustion engine 103. Also in this case, the reference torque is a value that is greater than or equal to the rotational load (pressure) MAX2 at the second top dead center TDC2 of the internal combustion engine 103 and less than the rotational load (pressure) MAX1 at the first top dead center TDC1 of the internal combustion engine 103. Set to

Although several embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

1000 Drive Control System 100 Drive Control Device (ECU)
B Battery 102 Motor 103 Internal combustion engine (engine)
104 sensors

Claims

A drive control system for controlling the drive of a four-stroke internal combustion engine,
A motor for applying torque to the internal combustion engine;
U-phase, V-phase, and W-phase sensor elements that output U-phase, V-phase, and W-phase detection signals corresponding to respective switching of magnetic fluxes of the U-phase, V-phase, and W-phase coils of the motor; A relucter provided on the rotor of the motor and having two edges in the rotation direction of the motor, and a pulse wave of the first polarity is output when the rising edge of the edge of the reluctor is detected and the falling edge of the reluctor edge A pickup coil that outputs a pulse wave of the second polarity upon detecting the passage of
A driver circuit for controlling the operation of a motor for applying torque to the internal combustion engine;
A controller that controls the driver circuit to drive the motor based on a change in top dead center and rotation angle of the internal combustion engine detected by the sensor, and
The controller is
After the power is turned on, the motor is driven to exceed a second top dead center between the exhaust stroke and the intake stroke of the internal combustion engine and between the compression stroke and the combustion stroke of the internal combustion engine. A reference torque that does not exceed the first top dead center is applied to the internal combustion engine to rotate the internal combustion engine,
After driving the motor and applying the reference torque to the internal combustion engine, the U-phase, V-phase, and W-phase output by the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor Drive control, wherein a reference position corresponding to a top dead center of the internal combustion engine is detected based on a detection signal and pulse information including the pulse wave output from the pickup coil in accordance with rotation of the motor. system.
The controller is
After the power is turned on, the reference torque is applied to the internal combustion engine to rotate the internal combustion engine in a normal direction by driving the motor forward.
Corresponding to the top dead center of the internal combustion engine based on the U-phase, V-phase, and W-phase detection signals and the pulse information after driving the motor forward and applying the reference torque to the internal combustion engine The drive control system according to claim 1, wherein a reference position to be detected is detected.
The reluctator is detected next to the first edge detected by the pickup coil when the motor is rotated forward, and next to the first edge when the motor is rotated forward. A second edge,
The first edge is provided at a position detected by the pickup coil when the rotation angle of the internal combustion engine is at a first detection angle between a natural stop position and top dead center. And a detection angle of
The second edge is provided at a position detected by the pickup coil when the rotation angle of the internal combustion engine is at a second detection angle closer to the top dead center than the first detection angle, and The drive control system according to claim 2, wherein the drive control system is associated with the second detection angle.
The drive control system according to claim 3, wherein the second detection angle is set to a top dead center of the internal combustion engine.
The drive control system according to claim 3, wherein the natural stop position is a rotation angle of the internal combustion engine that is located when the internal combustion engine is naturally stopped in a state where no torque is applied from the motor.
The controller is
After the motor is driven forward and the reference torque is applied to the internal combustion engine, it is first determined whether or not the first pulse wave of the pulse information output from the pickup coil has the first polarity. And
If the first pulse wave has the first polarity, determine whether the motor is reversely rotated after the motor is driven forward,
When the motor is reversely rotated after the motor is driven to rotate forward, the first pulse wave is based on the first edge,
The drive control system according to claim 4, wherein the second detection angle associated with the second edge is detected as the reference position corresponding to the first top dead center of the internal combustion engine. .
The controller is
If the motor is not rotating in the reverse direction after the motor is driven forward, it is determined whether or not the pickup coil is outputting a second pulse wave next to the first pulse wave of the pulse information. And
When the pickup coil outputs the second pulse wave, the second pulse wave is based on the second edge, and the second pulse wave is associated with the second edge. The drive control system according to claim 6, wherein a detection angle is detected as the reference position corresponding to the second top dead center of the internal combustion engine.
The controller is
When the pulse wave of the pulse information output from the pickup coil at first is not in the first polarity, it is determined whether or not the motor is reversely rotated after the motor is driven forward,
When the motor is rotating in the reverse direction after the motor is driven forward, the first pulse wave of the pulse information is based on the first edge,
The drive control system according to claim 6, wherein the second detection angle associated with the second edge is detected as the reference position corresponding to the first top dead center of the internal combustion engine. .
The controller is
It is determined whether or not the motor is reversely rotated after the motor is driven forward, and when the motor is not reversely rotated after the motor is driven forwardly, the first pulse wave of the pulse information is Is based on the second edge, and detects the second detection angle associated with the second edge as the reference position corresponding to the second top dead center of the internal combustion engine. The drive control system according to claim 8, wherein:
The drive control system according to claim 4, wherein the first edge is provided at a position detected by the pickup coil when a rotation angle of the internal combustion engine is in a compression stroke.
The drive control system is mounted on a motorcycle,
The motor is connected to the internal combustion engine of the motorcycle;
The drive control system according to claim 1, wherein the control unit starts and / or drives the internal combustion engine by driving the motor by the driver circuit.
The controller is
Starting to apply torque from the motor to the internal combustion engine,
Start measuring the torque application time from the start of torque application to the internal combustion engine,
Determining whether or not the rotational speed of the internal combustion engine has reached a target value;
When it is determined that the rotational speed of the internal combustion engine has not reached the target value, it is determined whether the torque application time has passed a set time,
When it is determined that the rotational speed of the internal combustion engine has reached the target value and when it is determined that the torque application time has passed the set time, the application of torque from the motor to the internal combustion engine is stopped. Thus, the forward drive control of the motor is executed. The drive control system according to claim 3.
The said control part determines whether the said motor is carrying out normal rotation or reverse rotation based on the change of the said U phase, V phase, and W phase detection signal. The drive control system described in 1.
The controller is
After the power is turned on and before starting the internal combustion engine, the motor is rotated forward so that the reference torque is applied to the internal combustion engine to cause the internal combustion engine to rotate forward.
Corresponding to the top dead center of the internal combustion engine based on the U-phase, V-phase, and W-phase detection signals and the pulse information after driving the motor forward and applying the reference torque to the internal combustion engine To detect the reference position
The ignition of the internal combustion engine is controlled by determining the stroke of the internal combustion engine based on the detected reference position while controlling the motor when starting the internal combustion engine. 4. The drive control system according to 3.
A drive control system for controlling the drive of a four-stroke internal combustion engine according to each switching of a motor that applies torque to the internal combustion engine and a magnetic flux of a U-phase, V-phase, and W-phase coil of the motor U-phase, V-phase, and W-phase sensor elements that output U-phase, V-phase, and W-phase detection signals; a relucter that is provided in the rotor of the motor and has two edges in the rotation direction of the motor; A pickup coil that outputs a pulse wave of a first polarity when detecting the passage of the rising edge of the reluctor edge, and outputs a pulse wave of the second polarity when detecting the passage of the falling edge of the reluctor edge A driver circuit that controls the operation of a motor that applies torque to the internal combustion engine, and a top dead center and a rotation angle detected by the sensor Based on the change, a control method of a drive control system and a control unit which controls the driver circuit to drive the motor,
The controller is
After the power is turned on, the motor is driven to exceed a second top dead center between the exhaust stroke and the intake stroke of the internal combustion engine and between the compression stroke and the combustion stroke of the internal combustion engine. A reference torque that does not exceed the first top dead center is applied to the internal combustion engine to rotate the internal combustion engine,
After driving the motor and applying the reference torque to the internal combustion engine, the U-phase, V-phase, and W-phase output by the U-phase, V-phase, and W-phase sensor elements according to the rotation of the motor Drive control, wherein a reference position corresponding to a top dead center of the internal combustion engine is detected based on a detection signal and pulse information including the pulse wave output from the pickup coil in accordance with rotation of the motor. How to control the system.