JP2000045920A - Engine starting system, starting method and starter motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reliable engine starting system which can prevent occurrence of wear and chipping of a pinion or the like through a gentle engagement between the pinion and a ring gear and which can perform optimum starting control of the engine, so that excellent durability and reduction of noise can be achieved. SOLUTION: When an engine operating condition detector of a controller detects the stop of an engine, a pinion control portion controls a pinion to be gently engaged with a pinion with a ring gear 3 portion. After lapse of a predetermined time, a pinion- driven solenoid 13 is de-energized. A motor control portion of the controller energizes a motor 11 when a driver turns a vehicle key switch on. The motor 11 is de-energized when the engine operating condition detector detects that the number of revolutions of the engine exceeds the number of revolutions from which it is decided that the starting of the engine has been completed. Simultaneously, a holding means control portion energizes a plunger stopper 19. Then, when the plunger stopper 19 is de- energized, the starting of the engine is completed. Again, the engine operating condition detector of the controller detects whether the engine has been stopped or not. Thereafter, the above-described operation is repeated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an engine starting device for starting an engine, a starting method, and a starter motor.

[0002]

2. Description of the Related Art In a starter motor for starting an engine, a large current is supplied to a magnetic switch, and a large attraction force acting on a plunger causes a pinion to be rapidly transferred in a ring gear direction, so that the pinion and the ring gear are separated from each other. Crash violently.

As a technique for avoiding a violent collision between the pinion and the ring gear, for example, Japanese Utility Model Publication No.
There is an electromagnetic switch device described in Japanese Patent No. 38382.

[0004] In the above-mentioned publication, the electromagnetic switch device of the starting motor in which the impact force is reduced when the driven gear (ring gear) of the internal combustion engine meshes with the driving gear (pinion) of the starting motor when the starting motor is started. It is intended to provide. In order to achieve this object, a delay circuit for delaying energization to the starting motor and a coil for moving the plunger from the time when the key switch is turned on to the time when the driving gear and the driven gear come into contact with each other, A coil that is energized by turning on a key switch,
The electromagnetic switch device is provided with a coil that is divided into a coil that is energized by an output signal from the delay circuit and that moves the plunger in two stages.

Since the starting motor is driven to rotate by the delay circuit after the driving gear and the driven gear come into contact with each other,
The impact force when the driving gear and the driven gear mesh with each other is reduced. Also, by virtue of the plunger being configured to move gradually in two stages, a sharp collision of the driven gear with the driven gear can be avoided.

[0006]

However, in the above prior art, when the engine is started, the drive gear must move to the driven gear side, so that a violent collision between the drive gear and the driven gear can be avoided, The collision itself at the time of starting could not be avoided.

In the prior art, as described above, the starting motor is rotated after the driving gear and the driven gear come into contact with each other, so that the impact force at the time of engagement between the driving gear and the driven gear is reduced. However, control of the rise of the rotation of the drive gear is not taken into consideration, and the rotational impact force cannot be reduced further.

Further, no consideration has been given to quickly releasing the pinion after the engine is started.

SUMMARY OF THE INVENTION The object of the present invention has been made in view of the above-mentioned point, and the pinion and the ring gear are gently engaged with each other to prevent wear and chipping of the pinion and the ring gear, and to perform optimal starting control of the engine. , Durable,
An object of the present invention is to provide an engine starting device, a starting method, and a starter motor with low noise and high reliability.

[0010]

In order to achieve the above object, the present invention is configured as follows.

(1) A ring gear for transmitting a rotational force to an engine, a motor for generating a rotational force for starting the engine, and an output rotary shaft slidably supported by an output rotary shaft of the motor. A pinion that rotates in accordance with the rotation of the ring gear and is capable of meshing with the ring gear and releasing the meshing, and a pinion driving means for sliding the pinion on the output rotation shaft. A controller for controlling the motor and the pinion driving means in response to the instruction, and a holding means for holding the meshing state when the pinion and the ring gear are meshed, wherein the controller stops the engine. In the state, the pinion and the ring gear mesh with each other by the pinion driving means. A motor control unit for rotating the ring gear by rotating the pinion by the motor in the meshing state based on a start instruction of the engine, based on an instruction to start the engine, and A holding means control section for releasing the engagement between the pinion and the ring gear by the holding means.

When the engine is stopped, the pinion is moved toward the ring gear so as to mesh with each other, and this state is held by the holding means. In this case, since it is not necessary to start the engine immediately, the moving speed when the pinion is transferred to the ring gear can be sufficiently suppressed.

Further, when the start of the engine is instructed by the key switch, the pinion is rotated from the state where the pinion and the ring gear are already meshed, so that the impact due to the collision between the pionin teeth and the ring gear teeth is reduced. , And the engine is started in a short time.

(2) Preferably, in the above (1),
The pinion driving means includes a pinion driving solenoid for driving the pinion, a pinion control relay for supplying and stopping operation power of the pinion driving solenoid, and a resistor connected between the pinion control relay and the motor. Wherein the holding means includes an electromagnetic solenoid,
A holding member driven by the electromagnetic solenoid to fix the pinion driving means.

(3) Also, preferably, in the above (1) or (2), the controller is configured to control the engine based on output signals from a rotation sensor and a key switch of the engine.
An engine operating state determining unit that determines and outputs the operating state of the engine is provided.

(4) A roller clutch and a pinion are slidably supported on the output shaft of the motor, and the roller clutch and the pinion slide in the axial direction of the output shaft via a shift lever by a pinion drive solenoid. In a starter motor configured to be movable and the output shaft and the roller clutch are engaged with each other by a helical spline, a plunger stopper having an electromagnetic solenoid is provided on a plunger of the pinion drive solenoid, and the plunger stopper is provided. Is pressed against the plunger by a pressing spring.

(5) A ring gear for transmitting torque to the engine, a motor for generating torque for starting the engine, and a slidably supported output shaft of the motor. A pinion that rotates in accordance with the rotation of the rotating shaft and meshes with and releases the meshing with the ring gear; a pinion driving means for sliding the pinion on the output rotating shaft; and a key switch for instructing start of the engine. In the method for starting an engine by the engine starting device having the above, the key switch is meshed with the pinion and the ring gear by the pinion driving means while the engine is stopped, and the key switch is meshed with the pinion and the ring gear. When the start of the engine is instructed, the pinion is rotated by the motor. Te, rotating the ring gear, after the start of the engine, during operation of the engine, to release the engagement between the pinion and the ring gear of the holding means.

According to the present invention, the pinion and the ring gear are gently engaged with each other to prevent wear and chipping of the pinion and the like, and to perform optimal starting control of the engine. Thus, the durability, the noise, and the reliability are high. An engine starting device, a starting method, and a starter motor can be provided.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 to FIG.
An embodiment will be described. FIG. 1 is a schematic configuration diagram of an engine starting device according to a first embodiment of the present invention. In FIG. 1, a ring gear 3 is attached to a crankshaft 2 of a power transmission unit of an engine 1. The rotation speed of the ring gear 3 is detected by a rotation sensor 4, and the rotation speed of the engine 1 is determined based on the detected rotation speed. Is detected.

The starter 10 is mounted and fixed to the engine 1 with bolts. The starter 10 includes a motor 11 for generating power, a pinion 17 for transmitting the power of the motor 11 to the engine 1, a pinion drive solenoid 13 for controlling meshing between the pinion 17 and the ring gear 3, Plunger stopper (holding means) 1 for holding drive solenoid 13 in the operating state
9 is provided. The holding means has a function of holding the meshed state when the pinion and the ring gear are meshed.

Reference numeral 30 denotes a controller, which controls the motor 11 and the pinion driving means in response to an instruction to start the engine by a key switch. The controller 30 has an input port 301 for receiving output signals from the rotation sensor 4 and the key switch 5,
1 according to the control program stored in the memory (ROM) 302 in response to the signal from
A central processing unit (CPU) 304 interconnected with the CPU and performing data processing, and an output port 305 for transmitting an output signal of the CPU 304 to the outside.

An output signal from the output port 305 is supplied to a pinion control relay 41 for controlling the pinion drive solenoid 13, a motor control relay 42 for controlling the motor 11, and a plunger stopper for controlling the plunger stopper 19. It is supplied to the control relay 43.

FIG. 2 shows the first embodiment mainly with a control circuit. In FIG. 2, the engine starter supplies a current to the starter 10, the controller 30, the battery 50, a pinion control relay 41 for selecting whether or not to supply a current to the pinion drive solenoid 13, and a motor 11. A motor control relay 42 for selecting whether or not to supply current, a plunger stopper control relay 43 for selecting whether to supply current to the plunger stopper 19, and a resistor 60 are provided.

The functions executed by the CPU, the memory, the control program, and the like of the controller 30 are roughly classified into an engine operating state determination unit 310, a motor control unit 3
12, the pinion control unit 314 and the holding unit control unit 316
There is.

The engine operating state determination unit 310 determines whether the engine is stopped based on output signals from the engine rotation sensor 4 and the key switch 5, and determines whether the engine speed is higher than a predetermined value during operation. Determine the status and output.

When the engine is instructed to start, the motor control unit 312 rotates the pinion by the motor 11 to rotate the ring gear in a state where the pinion and the ring gear are engaged.

The pinion control section 314 controls the pinion control relay 41 and the pinion drive solenoid 13 so that the pinion meshes with the ring gear when the engine is stopped.

The holding means control section 316 releases the engagement between the pinion and the ring gear by the holding means when the engine speed is equal to or higher than a predetermined number of revolutions.

The resistor 60 has one end connected between the pinion control relay 41 and the pinion drive solenoid 13, and the other end connected to the motor control relay 42.
And the motor 11.

FIG. 3 shows the structure of the starter 10 in the above-described engine starter. In FIG. 3, an output shaft 12 of a motor 11 of a starter 10 is connected to a bearing 14 provided on a nose 14 a of a front bracket 14.
b and the bearing 15a of the rear bracket 15. A roller clutch 16 and a pinion 17 are slidably supported on the output shaft 12. The roller clutch 16 and the pinion 17 are connected to the shift lever 1 by the power of a pinion drive solenoid (electromagnetic solenoid) 13.
8 slides in the axial direction of the output shaft 12.

The output shaft 12 and the roller clutch 16 are connected to helical splines 12a, 1
6a engage each other.

The plunger 13a of the pinion drive solenoid 13 is provided with a plunger stopper 19 having an electromagnetic solenoid having an exciting coil 19c. The plunger holding member 19 of the plunger stopper 19
a is pushed toward the plunger 13a by the pushing spring 19b. Reference numeral 21 denotes a starter mounting portion of the engine. The starter mounting portion 21 is fitted to the spigot portion 14c of the front bracket 14 and is fixed to the flange portion 14d of the front bracket 14 by bolts 20. Thus, the starter 10 is mounted on the engine 1.

Next, the operation of the first embodiment of the present invention will be described. When the engine operation state determination unit 310 detects that the engine 1 has changed from the operation state to the stop state based on the signal of the rotation sensor 4, the pinion control unit 314
Turns on the pinion control relay 41. This allows
The pinion drive solenoid 13 of the starter 10 is energized.

When power is supplied from the battery 50 to the pinion drive solenoid 13, the plunger 13 a is attracted to the pinion drive solenoid 13 and the roller clutch 16 and the pinion 17 are connected to the ring gear 3 via the shift lever 18.
Transfer to the side.

Here, the suction force of the pinion drive solenoid 13 is set small, and the plunger 13
a has a plunger holding member 19a and a pressing spring 19b.
, The moving speed of the plunger 13a is reduced by the braking effect of the plunger holding member 19a.

Therefore, the moving speed of the pinion 17 is also reduced. At this time, when the end face of the pinion 17 does not contact the end face of the ring gear 3, the pinion 17 meshes with the ring gear 3 as it is. When the end face of the pinion 17 and the end face of the ring gear 3 come into contact with each other, a small current is supplied to the motor 11 via the resistor 60, so that the rotational torque of the motor 11 is small and the angular acceleration at the start of rotation is small. Since small, the pinion 17 rotates gently.

When the contact between the end face of the pinion 17 and the end face of the ring gear 3 is released, the pinion 17 gently meshes with the ring gear 3 as shown in FIG.

In this case, since the engine does not have to be started immediately, the moving speed when the pinion 17 is transferred to the ring gear 3 side can be sufficiently suppressed, and the end face of the pinion 17 and the end face of the ring gear 3 are separated. The impact force at the time of contact can be reduced.

As described above, since the engine does not have to be started immediately, the motor 11
Can be reduced, the contact between the end face of the pinion 17 and the end face of the ring gear 3 is released, and the rotational impact force due to the contact of the tooth face when the pinion 17 meshes with the ring gear 3 can be reduced.

Next, as shown in FIG. 4, when the pinion 17 meshes with the ring gear 3 and the plunger 13a is sucked to the maximum suction position, the plunger holding member 19a is
The plunger 13a moves downward in the drawing by the spring force of the pressing spring 19b, and prevents the plunger 13a from returning to its original position.

That is, a cutout is formed at the end of the plunger holding member 19a on the side of the plunger 13a, and the cutout is configured to engage with the end face of the plunger 13a.

When a predetermined time, for example, 1 to 2 seconds, has elapsed since the power supply to the pinion drive solenoid 13 was started, the power supply is automatically cut off. After the power is cut off, the pinion 17 is held by the plunger holding member 19a in a state of being meshed with the ring gear 3.

Thereafter, when the driver turns on the key switch 5 of the automobile in a state where the pinion 17 and the ring gear 3 are engaged with each other, the motor control relay 42 is turned on, the motor 11 is energized, and the motor 11 is supplied with rotational power. Generated. The rotational power of the motor 11 is transmitted to the ring gear 3 via the roller clutch 16 and the pinion 17, and starts the engine 1.

When the engine 1 starts and the rotation speed of the engine 1 exceeds the rotation speed of the pinion 17, the ring gear 3 drives the pinion 17, so that the helical connection between the output shaft 12 and the roller clutch 16 is performed. Spline 1
An axial thrust proportional to the driving torque of the ring gear 3 is generated in the directions 2a and 16a in a direction in which the pinion 17 is separated from the ring gear 3 due to the effect of the twist of the spline.

However, the plunger holding member 19a is
Since the plunger 13a is prevented from returning to the original position, the pinion 17 is held in engagement with the ring gear 3 via the shift lever 18.

After the engine is started, when the rotation speed of the engine 1 is detected by the rotation sensor 4 at a rotation speed at which the start of the engine 1 can be determined to be completed, for example, at a rotation speed of 600 r / min or more, the engine 1 is started. Controller 3
0 is determined by the motor control unit 312 and the motor control relay 4
At the same time, the plunger stopper control relay 43 is turned on by the holding means controller 316.

When the motor control relay 42 is turned off, the power supply from the battery 50 to the motor 11 is cut off, and the motor 11 is stopped. At the same time, power is supplied to the exciting coil 19c of the plunger stopper 19, and the exciting coil 19c The holding member 19a is compressed and sucked by the pressing spring 19b, and the engagement with the end face of the plunger 13a is released.

For this reason, the plunger 13a, the roller clutch 16 and the pinion 17 are
Due to the spring force b, the pinion 17 and the ring gear 3 return to the separated position as shown in FIG.

Thereafter, the plunger stopper control relay 4
3 is turned off by the controller 30, the energization to the exciting coil 19c of the plunger stopper 19 is cut off, and the plunger holding member 19a presses the original position, that is, the side surface of the plunger 13a by the spring force of the pressing spring 19b. Return to the state where you are.

Then, as described above, when the engine operating state determining unit 310 detects that the engine 1 has been changed from the operating state to the stopped state based on the signal of the rotation sensor 4, the pinion control unit 314 controls the shift lever 18 The roller clutch 16 and the pinion 17 are transferred to the side of the ring gear 3 via the ring gear 3, and the pinion 17 and the ring gear 3 are engaged with each other.

FIG. 5 is a flowchart showing the operation of the engine in the engine starting device described above, and FIG. 6 is a time chart showing the operation of each element of the engine and the starting device.
Shown schematically.

In FIG. 5, when the controller 30 detects that the engine 1 has stopped based on the output signal from the rotation sensor 4 (step S1 in FIG. 5, time T4 in FIG. 6), the controller 30 turns the pinion control relay 41 on. Then, the pinion drive solenoid 13 is energized (step S2), and the pinion 17 is gently engaged with the ring gear 3 (step S3).

Accordingly, the engine is stopped (T4 in FIG. 6).
−T5 or T0−T1), the pinion 17
And the ring gear 3 are in mesh with each other.

After a lapse of a predetermined time from the start of energization to the pinion drive solenoid 13 (step S4), the energization to the pinion drive solenoid 13 is cut off (step S4).
5).

Thereafter, the driver operates the key switch 5 of the automobile.
(Step S6, T5 or T5 in FIG. 6)
1) The motor 11 is energized (step S7). Then, the rotation speed Ns at which the rotation speed of the engine 1 can determine that the start of the engine 1 has been completed by the rotation sensor 4, for example,
When a rotational speed of 600 r / min or more is detected (step S8, T2 in FIG. 6), it is determined that the engine 1 has started, and the energization of the motor 11 is cut off and the plunger stopper 19 is energized (step S9). ).

Thereafter, the power supply to the plunger stopper 19 is cut off (step S10, T3 in FIG. 6), and the start of the engine 1 is completed (step S11). Then, the process returns to step S1, detects whether or not the engine 1 has stopped, and thereafter executes steps S2 to S11.

As described above, according to the first embodiment of the present invention, when the engine is stopped from the operating state, the pinion 17 is moved toward the ring gear 3,
The meshing state is maintained, and this state is maintained. In this case, since the engine does not have to be started immediately, the moving speed when transferring the pinion 17 to the ring gear 3 side can be sufficiently suppressed, and the rotational torque of the motor 11 can be sufficiently reduced. Not only can the impact force when the end face of the pinion 17 comes into contact with the end face of the ring gear 3 be reduced, but also the rotational impact force due to the contact of the tooth faces when the pinion 17 meshes with the ring gear 3 can be reduced. .

Conventionally, as shown by a two-dot chain line in FIG.
The meshing period between the pinion and the ring gear is limited to a short period from the start of the motor 11 to a predetermined time after the motor 11 is stopped. Since the engine is started in a state where the pinion and the ring gear are not meshed, the pinion 17 When the end face of the ring gear 3 comes into contact with the end face of the ring gear 3, the impact force is large.

When the driver turns on the key switch 5 of the automobile and tries to start the engine, the pinion 17 is rotated from the state where the pinion 17 and the ring gear 3 are engaged with each other, and the rotation power is transmitted to the ring gear. 3 and the engine 1 is started.

In this case, when the rotation of the pinion 17 starts, the pinion 17 and the ring gear 3 are already engaged with each other, so that the impact caused by the collision between the teeth of the pionin 17 and the teeth of the ring gear 3 is minimized. be able to.

Since the pinion 17 and the ring gear 3 are already engaged with each other, the engine start is performed in a shorter time than in the conventional case where the pinion and the ring gear are separated from each other. It can be done in a short time.

After the engine is started, when the rotation speed of the engine 1 is detected by the rotation sensor 4 to determine that the start of the engine 1 has been completed, the controller 30 determines that the engine 1 has been started. The pinion 17 is moved to release the engagement with the ring gear 3. This allows
After the engine 1 is securely started, the pinion 17
And the ring gear 3 can be disengaged.

Further, even if the driver turns on the key switch 5 by mistake after starting the engine 1, the pinion 17 is not transferred in the direction of the ring gear 3 while the engine 1 is rotating. . That is, in the first embodiment of the present invention, the pinion 17 is configured to move in the direction of the ring gear 3 and mesh with the ring gear 3 only when the engine 1 is stopped. As a result, after the engine is started, the key switch 5
, The collision between the pinion 17 and the ring gear 3 can be avoided.

Accordingly, the pinion and the ring gear are gently engaged with each other to prevent wear and chipping of the pinion and the ring gear, and to perform optimal engine start control.
It is possible to realize a highly reliable engine starter that is excellent in durability, has low noise, and has high reliability.

Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 7 shows a structure of a starter 10 according to the second embodiment of the present invention. Since the circuit configuration and the like are the same as in the first embodiment,
Detailed description is omitted.

Since the structure of the starter 10 is substantially the same as that of the first embodiment, only the differences from the first embodiment will be described.

In FIG. 7, the structure of the starter 10 according to the second embodiment is different from the first embodiment in that the roller clutch 16 is omitted.

A pinion 17 is slidably supported on the output shaft 12, and the output shaft 12 and the pinion 17 are connected to helical splines 12a, 17a for transmitting rotational power.
Are engaged with each other.

A dish-shaped disk 17 b is engaged with the pinion 17, and the pinion 17 is driven by a pinion drive solenoid (electromagnetic solenoid) 13 by a shift lever 18.
And slides in the axial direction of the output shaft 12 through the dish-shaped disk 17b.

Here, the outer diameter of the dish-shaped disk 17b is substantially equal to the inner diameter of the inner diameter portion 14e of the front bracket 14, and the gap between the dish-shaped disk 17b and the inner diameter portion 14e of the front bracket 14 is reduced. It is configured as follows.

As shown in FIG. 8, even when the pinion 17 is engaged with the ring gear 3, the gap between the dish-shaped disk 17b and the inner diameter portion 14e of the front bracket 14 is reduced.

As described above, according to the second embodiment of the present invention, in addition to the effects obtained by the first embodiment, the roller clutch 16 of the starter 10 is eliminated, and the axial length of the starter 10 can be reduced. The weight can be reduced and the cost can be reduced.

The dish-shaped disk 17 b can prevent water and dust from entering the inside of the starter 10.

FIG. 9 is an operation flowchart for starting the engine in the engine starting apparatus according to the third embodiment of the present invention. Note that the circuit configuration and the like are the same as in the first embodiment, and a detailed description thereof will be omitted.

In FIG. 9, the operation flowchart of the third embodiment is different from the operation flowchart shown in FIG. 5 in that step S12 is performed between steps S5 and S6.
Are added, and the other steps are the same as the steps shown in FIG.

That is, after the processing from step S1 to step S5 is performed, in step S12, the controller 30 determines whether or not the pinion 17 and the ring gear 3 are engaged.
Proceed to 6.

If it is determined in step S12 that the pinion 17 and the ring gear 3 do not mesh with each other, the process returns to step S1, and thereafter, steps S1 to S12 are executed.

Whether the pinion 17 and the ring gear 3 are engaged with each other is determined by detecting the position of the pinion 17 or by determining whether the plunger holding member 19a has moved from the initial state to the plunger holding state and has stopped. This can be achieved by providing a detecting means.

As described above, according to the third embodiment of the present invention, in addition to the effects obtained by the first embodiment, even if the meshing between the pinion 17 and the ring gear 3 fails, even if the Is detected, and the pinion 17 and the ring gear 3 can be reliably engaged with each other.

In the example described above, the pinion 1
7 is moved in the direction of the ring gear 3 and the condition for meshing with each other is set to the engine stopped state. However, the above conditions may be combined with other conditions, for example, opening and closing a door, wearing a seat belt in a driver's seat, and the like. It is also effective to replace the condition with the condition such as insertion of an engine key.

In the above-described example, the movement of the plunger 13a is stopped by the plunger holding member. However, the movement of the plunger 13a may be stopped by another member. For example,
The member that stops the movement of the shift lever 18 can also stop the movement of the plunger 13a.

[0082]

The present invention is configured as described above, and has the following effects.

The moving speed at the time of transferring the pinion to the ring gear can be sufficiently suppressed, the rotational torque of the motor can be sufficiently reduced, and the impact force when the end face of the pinion comes into contact with the end face of the ring gear can be reduced. Not only can it be reduced, but also the rotational impact force due to the contact of the tooth surface when the pinion meshes with the ring gear can be reduced.

When the driver turns on the key switch of the automobile and tries to start the engine, the pinion is rotated from the state in which the pinion and the ring gear 3 are engaged, so that the teeth of the pionin and the teeth of the ring gear are rotated. Can be suppressed to a minimum.

Further, since the pinion and the ring gear are already engaged with each other, the engine can be started in a short time.

That is, the pinion and the ring gear are gently engaged with each other to prevent wear and chipping of the pinion and the ring gear, and to perform optimal starting control of the engine. A starting device can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an engine starting device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a circuit of the engine starting device according to the first embodiment;

FIG. 3 is a diagram showing a structure of a starter in the engine starter according to the first embodiment.

FIG. 4 is an operation explanatory diagram of the engine starting device according to the first embodiment;

FIG. 5 is an operation flowchart for starting the engine in the engine starting device according to the first embodiment;

FIG. 6 is a time chart of an engine operation in the engine starter according to the first embodiment.

FIG. 7 is a diagram illustrating a structure of a starter in an engine starter according to a second embodiment.

FIG. 8 is an operation explanatory diagram of the engine starter according to the second embodiment.

FIG. 9 is an operation flowchart for starting the engine in the engine starting device according to the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Crank shaft 3 Ring gear 4 Rotation sensor 5 Key switch 10 Starter 11 Motor 12 Output shaft 13 Pinion drive solenoid 17 Pinion 19 Plunger stopper 19a Plunger holding member 19b Push spring 19c Excitation coil 30 Controller 41 Pinion control relay 42 Motor control relay 43 Plunger stopper control relay 50 Battery 60 Resistance

Claims (9)

[Claims] A ring gear for transmitting a rotational force to an engine, a motor for generating a rotational force for starting the engine, and a motor slidably supported by an output rotary shaft of the motor. An engine starter comprising: a pinion that rotates in accordance with the rotation to engage with the ring gear and release the engagement, and a pinion drive unit that slides the pinion on the output rotation shaft. And a controller for controlling the motor and the pinion driving means upon receipt of the signal, and holding means for holding the meshing state when the pinion and the ring gear are meshed with each other. The pinion driving means engages the pinion and the ring gear. A pinion control unit for controlling the rotation of the ring gear by rotating the pinion by the motor in the meshing state based on the start instruction of the engine; and An engine starting device, further comprising a holding unit control unit for releasing the engagement between the pinion and the ring gear by the holding unit. 2. An engine starter according to claim 1, wherein said pinion drive means includes a pinion drive solenoid for driving said pinion, and a pinion control relay for supplying and stopping operation power of said pinion drive solenoid. Wherein the holding means includes an electromagnetic solenoid, and a holding member driven by the electromagnetic solenoid to fix the pinion driving means. Engine starting device. 3. The engine starting state according to claim 1, wherein the controller determines an operating state of the engine based on an output signal from a rotation sensor and a key switch of the engine, and outputs the determined operating state. An engine starter comprising a determination unit. 4. The engine starting device according to claim 1, wherein said pinion driving means includes an electromagnetic solenoid, and a driving member for causing the pinion to slide on said output rotary shaft by said electromagnetic solenoid. Wherein the pinion control unit of the controller stops energizing the electromagnetic solenoid of the pinion driving unit when a predetermined time elapses after starting energizing the electromagnetic solenoid of the pinion driving unit. Engine starting device. 5. The engine starting device according to claim 3, wherein the controller starts the rotation of the motor when the engine speed detecting means detects that the engine speed has become higher than a predetermined speed. An engine starting device, wherein the engine is stopped and the engagement between the pinion of the holding means and the ring gear is released. 6. An engine starting device according to claim 1, wherein said output rotating shaft and said pinion are directly engaged with each other, and said pinion has a disk means for sliding on said output rotating shaft. An engine starting device, which is provided. 7. A roller clutch and a pinion are slidably supported on an output shaft of a motor, and the roller clutch and the pinion are slidable in the axial direction of the output shaft via a shift lever by a pinion drive solenoid. In the starter motor, wherein the output shaft and the roller clutch are engaged with each other by a helical spline, a plunger stopper provided with an electromagnetic solenoid is provided on a plunger of the pinion drive solenoid, and the plunger stopper is held by the plunger stopper. A starter motor, wherein a member is pressed against the plunger by a pressing spring. 8. A pinion is slidably supported on an output shaft of the motor, and the pinion is slidable in the axial direction of the output shaft via a shift lever by a pinion drive solenoid. In a starter motor in which the pinion and the pinion are directly engaged with each other by a helical spline, a disk means for sliding on the output rotation shaft is provided on the pinion, and an electromagnetic solenoid is provided on a plunger of the pinion drive solenoid. A starter motor comprising a plunger stopper, wherein a plunger holding member of the plunger stopper is pressed against the plunger by a pressing spring. 9. A ring gear for transmitting torque to an engine, a motor for generating torque for starting the engine, and a motor slidably supported by an output shaft of the motor. A pinion that rotates in accordance with the rotation and is capable of meshing with and releasing the meshing with the ring gear; a pinion driving means for sliding the pinion on the output rotary shaft; and a key switch for instructing start of the engine. In the method of starting an engine by an engine starting device, the pinion driving means meshes the pinion and the ring gear in a state where the engine is stopped, and the key switch is used by the key switch in a state where the pinion and the ring gear are meshed. When the start of is instructed, the pinion is rotated by the motor, Ring gear is rotated, and after starting of the engine, during operation of the engine, the start process of the engine, characterized in that to release the engagement between the pinion and the ring gear of the holding means.