JPH0835471A - Protection device for starter motor - Google Patents

Abstract

PURPOSE:To provide a starter motor protection device capable of protecting a starter motor via the prohibition of the operation thereof during engine operation. CONSTITUTION:This device is mounted on a vehicle equipped with an engine to be started on the operation of a starter motor, and has a voltage detecting section 12A for detecting the state of engine operation with an ignition power supply IG turned on. Also, the device is provided with a start signal switching section 12B for interrupting the transmission of a start signal ST1 (ST2) to drive the starter motor with a relay switch 130, upon the identification of the engine as operating via the section 12A, and for releasing the interruption of the transmission of the start signal ST1 (ST2) with the switch 130, upon the identification of the engine as not operating via the section 12A with the power supply IG turned off.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter motor protection device, and more particularly to a starter motor protection device for controlling a starter motor so that it does not operate while the engine is operating in a drive device such as a vehicle equipped with an engine.

[0002]

2. Description of the Related Art In a vehicle equipped with a prime mover such as a gasoline engine, a diesel engine, an LPG engine or an ethanol engine, when starting the engine,
Turn the ignition key to the start side to operate the starter motor. Normally, the torque generated by this starter motor is transmitted to the flywheel or drive plate of the engine by cranking to rotate the engine.

If the ignition key is turned to the start side while the engine is operating, an unpleasant sound is generated and the engine is likely to stall. This is a phenomenon that occurs when the pinion gear of the starter motor pops out and comes into contact with the gears of the flywheel and the drive plate, and the load reduces the engine speed.

As described above, it is common for anyone to accidentally turn the ignition key to the start side even when the engine is operating. In the case of a vehicle model where the engine sound is quiet, it is not possible to instantly determine whether the engine has started, and the ignition key may be mistakenly turned again.

At this time, it suffices to confirm the start of the engine through a meter on the display panel, for example, a tachometer, but the key operation for starting the engine is unknowingly performed as the operator gets used to it.

Therefore, the judgment as to whether or not the engine could be started often depends more on the sense of perceiving the auditory sense and the vibration than the sense of sight.

[0007]

As described above, when the ignition key is turned to the start side even when the engine is operating, the starter motor automatically operates and the starter motor, the flywheel, and the drive plate are burdened. Will be applied. There is a problem in that the life and durability of the starter motor, the flywheel, and the drive plate are reduced if such an incorrect key operation is repeated.

Further, when the driver or passenger is not familiar with the internal structure of the automobile, there is a fear that the unpleasant sound generated between the gears due to the erroneous key operation as described above is a trouble in the automobile itself. There was also a problem of giving the driver and passengers.

The present invention has been made in consideration of the above-mentioned problems, and provides a starter motor protection device capable of protecting the starter motor by not operating the starter motor during engine operation. The purpose is to

It is another object of the present invention to provide a starter motor protection device capable of confirming the energization state of the ignition power source and preventing the starter motor from operating during engine operation.

Further, in addition to the object of the invention of claim 1, the invention of claim 3 is a protection device for a starter motor which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

It is an object of the present invention to provide a starter motor protection device capable of confirming the power generation state of the generator and preventing the starter motor from operating during engine operation.

In addition to the object of the invention of claim 4, the invention of claim 5 is a starter motor protection device which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

A further object of the present invention is to provide a starter motor protection device capable of confirming the energized state indicated by a check lamp and preventing the starter motor from operating during engine operation. To do.

In addition to the object of the invention of claim 6, the invention of claim 7 is a protection device for a starter motor which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

[0016]

In order to solve the above-mentioned problems, the starter motor protection device according to the invention of claim 1 is a starter motor when the detected operating state of the engine indicates that it is in operation. The configuration is such that the supply of the start signal for activating the start signal is cut off, and the cutting operation of the start signal is canceled when the non-operation is indicated during this period.

The starter motor protection device according to the second aspect of the present invention detects the voltage on the signal line for energizing the ignition power source, and when it reaches a predetermined value, detects that the engine is operating, The configuration is such that when the predetermined value is not reached, it is detected that the engine is not operating.

Further, the starter motor protection device according to the third aspect of the present invention has a structure in which the ignition power source and the connector for connecting to each signal line for supplying the start signal of the starter motor are respectively energized.

The starter motor protector according to the fourth aspect of the present invention detects that the engine is in operation when the voltage difference between the battery voltage and the generator voltage reaches a predetermined value, and determines the predetermined value. When the value of has not reached, it is configured to detect that the engine is not operating.

The starter motor protection device according to the invention of claim 5 has a structure in which a connector for connecting an ignition power source, a start signal of the starter motor, and a signal line for energizing the power generation signal of the generator are connected. Is.

Further, the starter motor protection device according to the invention of claim 6 detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage applied to the indicator lamp reaches a predetermined value. However, it is configured to detect that the engine is not operating when it does not reach the predetermined value.

The starter motor protector according to the invention of claim 7 has a connector for connecting an ignition power source, a starter motor start signal, and an indicator lamp energizing signal to respective signal lines for energizing the signal. Is.

[0023]

According to the first aspect of the present invention, the starter motor protection device cuts off the supply of the start signal for operating the starter motor when the detected engine operating state indicates that the engine is operating, and the starter motor is not activated during this period. When the inside is indicated, the cutting operation of the start signal is released, so once the engine starts, the start signal is not supplied to the starter motor even if the start signal is generated.
Useless starter motor operation is prevented during engine operation.

The starter motor protector according to the second aspect of the present invention detects the voltage on the signal line for energizing the ignition power source, and when it reaches a predetermined value, detects that the engine is in operation and determines the predetermined value. Since it is configured to detect that the engine is not operating when it has not reached the value of, the fact that the voltage of the ignition power supply rises to the battery voltage or higher when detecting the engine operating condition is used. it can. Further, a new circuit or device is not added, and the number of parts can be set small.

Further, the starter motor protector according to the third aspect of the present invention has the connector for connecting the ignition power supply and the start signal of the starter motor to the respective signal lines to be energized. The connector is used to connect and disconnect freely at any time.

The starter motor protector according to the fourth aspect of the present invention detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage of the generator reaches a predetermined value, and determines the predetermined value. Since it is configured to detect that the engine is not operating when it has not reached the value, it uses the cancellation of the voltage between the voltage of the generator and the voltage of the battery when generating power when detecting the operating state of the engine. be able to. Further, a new circuit or device is not added, and the number of parts can be set small.

Further, the starter motor protection device according to the invention of claim 5 has a constitution in which the ignition power source, the starter motor start signal, and the connector for connecting to each signal line for energizing the power generation signal of the generator are provided. A connector is connected to the drive unit so that the user can freely attach and detach at any time.

Further, the starter motor protection device according to the invention of claim 6 detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage supplied to the indicator lamp reaches a predetermined value. Since the configuration is such that the engine is not operating when it does not reach the specified value, it is possible to cancel the voltage between the voltage supplied to the indicator lamp and the voltage of the battery when detecting the engine operating condition. Can be used. No new circuit or device is added, and the number of parts can be reduced.

The starter motor protector according to the invention of claim 7 has a connector for connecting to each signal line for energizing the ignition power source, the starter motor start signal, and the indicator lamp energizing signal. A connector is connected to the drive unit so that the user can freely attach and detach at any time.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. (First Embodiment) In the first embodiment, even if the ignition key is mistakenly turned to the start side after the engine is started, the start signal of the starter motor is cut before the starter motor, and the starter motor during engine operation 2 is an example of a configuration for preventing the restart of the.

Regarding the above electrical control, the fact that the battery voltage is around 12V when the engine is stopped, and that the alternator, which is a generator when the engine starts, starts power generation and the voltage rises to a little over 14V, is utilized. Thus, the voltage difference between the voltages generated before and after the engine is started is detected. The start signal is cut according to the level of the voltage difference.

FIG. 1 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 1. FIG.
At the key cylinder 50, the signal lines 52, 54, 5
A female connector 60 connected via 6, 58 and a male connector 62 connected to the ends of signal lines 64, 66, 68, 70 from the electric system inside the automobile are connected to each other. Is. As shown in FIG. 1, the starter motor protection device 10 according to the present embodiment has a structure in which a connector connection is made between the female connector 60 and the male connector 62 so as to be interrupted.

The protection device 10 is connected to the starter control section 12 for controlling ON / OFF of the starter motor according to the operating state of the engine and the starter control section 12 via signal lines 20, 22, 24. One female connector 18, a first male connector 30 electrically connected to the first female connector 18, a second female connector 32 electrically connected to a male connector 62, and a female connector 60. And a second male connector 34 electrically connected to.

Female connector 60 and second male connector 3
4, the second female connector 32 and the male connector 62, and the first male connector 30 and the first female connector 18 are all capable of being electrically connected in a fitted state. Therefore, it is possible to freely and easily attach and detach the pair of connectors.

As a signal for operating the protection device 10 of this embodiment, an ignition power source IG which is a power source for the ignition system, an accessory power source ACC which is a power source for a clock, a car audio system, etc., and a regular power source which is a standby power source. AM and a start signal ST for instructing ON / OFF of starter motor start are used.

Regarding the signal lines, between the second female connector 32 and the second male connector 34, the signal lines 36, 38, 40 for transmitting the permanent power source AM, the accessory power source ACC, and the ignition power source IG are connected. To be done. Since the starter controller 12 controls ON / OFF of the start signal ST, a signal path for indirectly transmitting from the second male connector 34 to the second female connector 32 is provided.

The signal line for transmitting the start signal ST is divided into signal lines 42 and 44. One signal line 44 outputs the start signal ST from the second male connector 34 to the starter controller 1, so that one end is connected to the second female connector 34 and the other end is connected to the first male connector 30. It
The other signal line 42 is connected to the first male connector 30 at one end and to the second female connector 32 at the other end in order to output the start signal ST from the starter control unit 12 to the electric system inside the vehicle. . Hereinafter, the start signal ST flowing through the signal line 44 will be referred to as ST1 and the start signal ST flowing through the signal line 42 will be referred to as ST2.

Between the first female connector 18 forming a pair with the first male connector 30 and the starter controller 12, the signal lines 24 and 20 for transmitting the start signals ST1 and ST2, respectively, and the ignition described above. The signal line 22 for transmitting the power source IG is connected. A body ground wire 16 is connected to the starter control section 12 for grounding, and the body ground wire 16 is tightened together with a bolt of the vehicle body to be grounded.

Further, the key cylinder 50 and the female connector 6
Between 0 and the power supply AM, accessory power supply ACC,
Ignition power supply IG and signal lines 52, 54, 56 and 58 for transmitting start signal ST are connected.
Signal lines 64, 66, 68 and 70 for transmitting a permanent power supply AM, an accessory power supply ACC, an ignition power supply IG and a start signal ST are connected to a male connector 62 connected to an electric system inside the automobile.

The permanent power supply AM is a power supply supplied to the key cylinder 50 from the + pole of a battery (not shown). The ignition power supply IG is a power supply that energizes when the key inserted in the key cylinder 50 is turned to the ignition on position, and functions as a circuit power supply of the starter control unit 12.

In the connected state of the female connector 60 and the male connector 62, the start signal ST is turned on when the key inserted in the key cylinder 50 is turned to the start position, and a starter relay (not shown) is turned on. It is a signal for closing and starting the starter motor. In this embodiment, regarding the start signal ST, even if the start signal ST1 is on, the starter controller 12 is operating during engine operation.
As a result, the start signal ST is turned off, that is, the start signal ST2 is turned off, and the starter relay is also kept open.

As described above, the protection device 10 according to the present embodiment.
In order to control the operation of the starter relay that switches the starter motor on and off, the key cylinder 50 and the starter relay are connected so as to be interrupted.

FIG. 2 shows a starter controller 1 according to the first embodiment.
It is a block diagram which shows the circuit structure of 2. As shown in FIG. 2, the starter control unit 12 of the present embodiment detects the voltage of the ignition power source IG to determine the operating state of the engine, and the interior of the vehicle according to the determination result of the voltage detection unit 12A. The electric signal is provided with a start signal opening / closing unit 12B that cuts or releases the supply of the start signal ST2.

The voltage detector 12A includes a relay switch 100 which operates at 12V or more and a diode 1 for preventing backflow.
02, 104 and resistors 106, 10 for voltage drop
8, a variable resistor 110, and an NPN type transistor 1
12 and Zener diode 11 that operates at 12V or higher
4, the capacitors 116 and 118, and the NAND gate 12
With 0 and.

The start signal switching section 12B includes resistors 122 and 124 for voltage drop, NPN type transistors 126 and 128 similar to the transistor 112, and 12
And a relay switch 130 that operates at V or higher.

Next, the operation of the starter controller 12 will be described. FIG. 3 is a timing chart of various signals according to the first embodiment, and FIG. 4 is an explanatory diagram showing an example of the positional relationship between the various signals shown in FIG. 3 and the keys on the key cylinder. It should be noted that the same state is shown from the beginning to the end in correspondence with FIGS.

Regarding the key operation on the key cylinder 50, for example, in the case of a domestic car, the key is rotated right to start the engine. This will be described with reference to FIG. 4. When the key is inserted, the key is set to “OFF”, that is, the ignition off position. This "OFF"
At the stage, as shown in FIG. 3, all are at “L” level except for the standby power supply AM (“H” level). Where "L"
The level is 0V and the "H" level is 12V or higher.

Then, when the key is turned to the right, "AC
The key is set to "C", that is, the position of the accessory power supply ACC ON. At this "ACC" stage, as shown in FIG. 3, the accessory power supply ACC becomes "H" level. Thereby, for example, a radio can be turned on, an audio cassette or the like can be driven.

When the key is further turned to the right,
That is, the key is set at the position where the ignition power source IG is turned on. At this "ON" stage, the ignition power supply IG becomes "H" level as shown in FIG. As a result, power is supplied to the ignition system.

When the key is turned all the way to the right in this state,
The key is once returned to the "START" position, that is, to the "ON" position again when the engine start position is reached. As shown in FIG. 3, the start signal ST1 becomes "H" when the key is at the "START" position,
It returns to "L" when it returns to the "ON" position.

When the engine is not operating, the start signal ST1 ("H") is directly input to the starter relay as the start signal ST2 by the protective device 10 (starter control unit 12) to start the starter motor. it can. This starts the engine and puts it into operation. Even if the key is turned from "ON" to "START" again while the engine is operating and the start signal ST1 is "H", the start signal ST2 is set to "L" in the protection device 10 (starter controller 12). Is output.

Here, the circuit operation of the starter controller 12 will be described in detail. "OFF" position In this position, the relay switch 100 is not operated yet and is located on the terminal c side. As long as this state continues, the voltage detector 1
A path for supplying the ignition power supply IG to 2A is maintained. Similarly, the relay switch 130 does not operate and is located on the terminal a side. As a result, the signal line 24 for inputting the start signal ST1 and the signal line 20 for outputting the start signal ST2 are connected via the relay switch 130. Therefore, until the relay switch 130 is switched to the terminal b, the start signal ST1 and the start signal ST2 are at the same level.

Position of “ACC” Since only the accessory power supply ACC is activated at this position, there is no influence on the operation on the starter control unit 12. "ON" position In this position, the ignition power supply IG is supplied to the starter control unit 12 via the terminal c. The ignition power supply IG first flows in the order of the voltage detection unit 12A and the start signal opening / closing unit 12B. In the voltage detection unit 12A, the voltage level input to the NAND gate 120 by the variable resistor 110 and the transistor 112 is 12.5 to 14V.
It is variable between. Therefore, in the present embodiment, as an example, the voltage level reference is set to 13V.

At the "ON" stage, the ignition power source IG indicates the 12V voltage supplied from the battery. In the case of 12V, the voltage of up to 13V (ignition power supply IG) is cut by the circuit configuration of the variable resistor 110 and the transistor 112, so N
The output of the AND gate 120 becomes "L". in this case,
The relay switch 130 of the start signal opening / closing section 12B does not operate, and the start signal ST1 remains the start signal S.
It becomes T2.

Position of “START” When the key is turned to this position, the voltage detection unit 12A and the start signal opening / closing unit 12B operate in the same manner as in the case of first “ON”, so that the start signal ST1 is “H”. Flows as it is to the starter relay as the start signal ST2, and the starter motor operates. Then, the engine is started and the engine is in operation. As a result, a generator (for example, an alternator) starts power generation, and the ignition power source IG supplied from the battery changes from 12V to 13V.
Rise above V.

At this time, the voltage flowing through the voltage detector 12A becomes 13V or higher, and the output of the NAND gate 120 becomes "H". As a result, the relay switch 130 of the start signal opening / closing unit 12B operates, the switch switches from the terminal a to the terminal b, and the start signal ST1 becomes open. That is, the supply of the start signal ST1 to the starter relay is cut off.

At this time, the relay switch 100 also operates, and the switch is switched from the terminal c to the terminal d. As a result, the ignition power supply I
G is not supplied and flows to the start signal opening / closing unit 12B.
The diode 104 prevents the ignition power supply IG from flowing to the voltage detection unit 12A. By operating the relay switch 100 in this manner, unnecessary operation of the starter controller 12 can be avoided and malfunction can be prevented.

"START" position (re) Once the key is returned to the position of and is turned to the "START" position again, the start signal ST1 becomes "H" again. However, in the starter control 12, since the start signal ST1 is opened by the ignition power source IG of 13V or more indicating that the engine is operating, the start signal ST1 (“H”) cannot be transmitted to the start signal ST2, and the start signal ST1 The supply remains cut.

The circuit state of the starter control section 12 is such that the key is returned to the "ACC" position to deactivate the engine and the ignition power source IG is set to "L" (0
It can be canceled by setting V). That is, the relay switches 100 and 130 may be returned to the initial state.

As described above, according to the first embodiment, when the detected operating state of the engine indicates that the engine is operating, the supply of the start signal for operating the starter motor is cut off, and the operation is started during this period. When the inside is indicated, the supply of the start signal for activating the starter motor is cut off, and when it is indicated during the non-operation, the cutting operation of the start signal is canceled. Even if a start signal is generated, the start signal is not supplied to the starter motor, so that unnecessary operation of the starter motor is prevented during engine operation. Therefore,
The starter motor can be protected by not operating it while the engine is operating.

Since the ignition power source IG and the starter signal ST of the starter motor are connected to the respective signal lines for energizing, the connector is connected to the electric system inside the vehicle, and the connector can be freely connected at any time. Can be attached and detached. Therefore, it is possible to perform troubleshooting and fail safe by using the existing connection and making it detachable.

(Second Embodiment) In the second embodiment, when the voltage difference between the battery voltage and the generator (eg alternator) voltage (power generation signal PW) reaches a predetermined value, the engine Between the voltage of the generator and the voltage of the battery when power is generated when detecting the operating state of the engine by detecting the operating state and detecting that the engine is not operating when it does not reach the specified value. Voltage cancellation can be used. Further, since existing circuits can be used without adding a new circuit or device, the number of parts can be reduced. Therefore, it is possible to confirm the power generation state of the generator and prevent the starter motor from operating while the engine is operating.

Since the ignition power source IG, the starter signal ST of the starter motor, and the signal line PW of the generator are connected to the respective signal lines for energizing, the connector is connected to the drive unit. It is carried out and can be freely attached and detached at any time. Therefore,
By using existing wiring and making it detachable, troubleshooting and fail-safe are possible.

FIG. 5 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 3. In the figure, in the protection device 11 according to the second embodiment,
The configuration in which the signal line 14 for inputting the power generation signal PW of the alternator, which is a generator, is connected has the above-mentioned protection device 10.
It is a part different from. Note that the same configuration as in FIG.
The same numbers are assigned and the description is omitted. Regarding acquisition of the power generation signal PW from the alternator, for example, the signal line 1
4 may be connected to the negative side of the battery charge warning lamp with a component such as an electrotap.

FIG. 6 is a block diagram showing the circuit configuration of the protection device according to the second embodiment. As shown in FIG. 6, the starter control unit 13 of the present embodiment detects the voltages of the ignition power source IG and the power generation signal PW to determine the engine operating state, and the determination result of the voltage detection unit 13A. According to the above, a start signal opening / closing unit 13B that cuts or releases the supply of the start signal ST2 is provided to the electric system inside the vehicle.

The voltage detector 13A has an IG terminal 200a for inputting the ignition power source IG from the signal line 22,
PW terminal 20 for inputting the power generation signal PW from the signal line 14
0b, a diode 202 for preventing reverse current, resistors 204, 206 and 208 for voltage drop, an NPN type transistor 210, a capacitor 212, and a NAND gate 214.

The start signal opening / closing unit 13B has a resistor 216 for voltage drop and an N similar to the transistor 210.
It is provided with PN type transistors 218 and 220 and a relay switch 222 that operates at 12 V or higher.

Next, the operation of the starter controller 13 will be described. FIG. 7 is a timing chart of various signals according to the second embodiment. 7A to 7C show the key positions as in the first embodiment. Position of "OFF" In this position, the relay switch 222 of the start signal opening / closing unit 13B is not operated yet and is located on the terminal e side. As a result, the signal line 24 for inputting the start signal ST1 and the signal line 20 for outputting the start signal ST2 are connected via the relay switch 222. Therefore, until the relay switch 222 is switched to the terminal f, the start signal ST1 and the start signal ST2 are at the same level.

Position of “ACC” Since only the accessory power supply ACC is activated at this position, there is no influence on the operation on the starter controller 13. "ON" position At this position, the ignition power supply IG is supplied to the starter control unit 13 via the signal line 22. The ignition power source IG first flows in the order of the voltage detection unit 13A and the start signal opening / closing unit 13B. In the voltage detector 13A,
Since the input level of the NAND gate 214 is "H" of 12V supplied from the battery, the output level is "L".
Becomes Therefore, in the start signal opening / closing unit 13B, the relay switch 222 does not operate, the position on the terminal e side is held, and the start signal ST1 becomes the start signal ST2 as it is.

Position of "START" When the key is turned to this position, the voltage detection unit 13A and the start signal opening / closing unit 13B operate in the same manner as in the case of the first "ON", so that the start signal ST1 is at "H". Flows as it is to the starter relay as the start signal ST2, and the starter motor operates. Then, the engine is started and the engine is in operation. As a result, the generator (alternator) starts power generation, and the ignition power supply IG supplied from the battery rises from 12V to 13V or higher.

At this time, the voltage of the ignition power supply IG that has already been input rises to 13 V or higher and the voltage of 13 V or higher is input to the voltage detection unit 13A from the IG terminal 200a. Similarly, the power generation signal P from the alternator
W is input. The power generation signal PW is 0 V before the engine is operated because the power generation is started by the operation of the engine. Therefore, when the engine operates, the power generation signal PW
Has a voltage of 13 V or higher and is input from the PW terminal 200b.

Ignition power supply IG during engine operation
And the power generation signal PW have substantially the same voltage value. In the transistor 210, the ignition power supply IG and the power generation signal PW are canceled and grounded by utilizing the above-mentioned characteristic of having substantially the same voltage value. Therefore, the input of the NAND gate 214 becomes "L" and the output becomes "H". This "H" level signal is input to the start signal opening / closing unit 13B to operate the relay switch 222.

In the relay switch 130, the switch is switched from the terminal e to the terminal f, and the start signal ST1 becomes open. That is, the supply of the start signal ST1 to the starter relay is cut off.

Position of "START" (Re) Once the key is returned to the position of and is turned to the position of "START" again, the start signal ST1 becomes "H" again. However, the starter control unit 13 keeps the start signal ST1 open because the alternator continues to generate power during engine operation.
Since T1 (“H”) cannot be transmitted to the start signal ST2, the supply of the start signal ST1 remains cut.

As for the circuit state of the starter control section 13, the key is returned to the "ACC" position to deactivate the engine, and the ignition power source IG is set to "L" (0
It can be canceled by setting V) and stopping the power generation of the alternator. That is, the relay switch 222 may be returned to the initial state.

(Third Embodiment) In the second embodiment, the relay switch 222 of the starter controller 13 is operated by the plus control, but in the third embodiment described below, the relay switch of the starter controller is operated. It is operated by a minus control. The third
Similarly to the second embodiment, the starter control unit of the embodiment includes the ignition power supply IG, the start signal ST1 and the power generation signal PW as the input signals, and the start signal ST2 as the output signal.

FIG. 8 is a block diagram showing the circuit configuration of the starter controller according to the third embodiment. As shown in FIG. 8, the starter control unit 19 of the present embodiment uses the ignition power source I.
G, the voltage detection unit 19A that detects each voltage of the power generation signal PW to determine the operating state of the engine, and the start signal S to the electric system inside the vehicle according to the determination result of the voltage detection unit 19A.
A start signal opening / closing unit 19B that cuts or releases the supply of T2 is provided.

The voltage detector 19A has an IG terminal 300a for inputting the ignition power source IG from the signal line 22,
PW terminal 30 for inputting the power generation signal PW from the signal line 14
0b, a diode 302 for preventing backflow, and a relay switch 304 that operates at “L” level, that is, minus control. Start signal opening / closing section 19B
Includes a relay switch 306 that operates at "L" level, that is, minus control.

Next, the operation of the starter controller 19 will be described. In the third embodiment, the signal timing is set according to FIG. 7 as in the second embodiment. Therefore, the timing chart shown in FIG. 7 is referred to.

In the voltage detector 19A shown in FIG.
As shown in (position), the relay switch 304 is operated at the rising "H" of the ignition power supply IG.
The signal "H" is input to the start signal opening / closing section 19B when the relay switch 304 is closed, and the relay switch 306 is operated. By this series of operations, the start signal ST1 is closed and the start signal ST1 is
Is formed to the start signal ST2.

When the start signal ST1 "H" is input to the start signal opening / closing section 19B, a similar signal "H" is input to the start signal ST2 via the relay switch 306.
Is output as The start signal ST2 activates the starter relay to start the starter motor.

When the engine is started in this way, power generation by the alternator is started, and the PW of the voltage detector 19A is started.
The power generation signal PW (“H”) is input from the for-use terminal 300b. The voltage is canceled between the power generation signal PW and the ignition power source IG input from the IG terminal 300a,
The voltage becomes "L" level. The relay switch 304 is opened by this minus control. At the same time, the input of the relay switch 306 also becomes “L”, following the operation of the relay switch 304 and opening.

In the relay switches 304 and 306, the open state is maintained until the cancellation is canceled. The engine is stopped at the same time when the input of the ignition power source IG is stopped, and the power generation of the alternator is also stopped, so that the above offset is canceled.

In the third embodiment, not only the same effect as in the second embodiment described above is obtained, but one relay switch 304 is used as a relay of small electric power (for example, within 20 mA) and the other relay switch 306 is set to 12V. By using the DC power relay, it is possible to reduce the load on the starter control unit 19 and prevent malfunction.

(Fourth Embodiment) In the second and third embodiments, the relay switch of the starter control section is operated by the plus control and the minus control, but in the fourth embodiment described below, the starter control section is operated. The relay switch of is operated by the minus control by the transistor. The starter control unit of the fourth embodiment also inputs the ignition power source IG and the start signal ST as in the case of the second and third embodiments.
1, the power generation signal PW, and the output signal is the start signal ST2.

FIG. 9 is a block diagram showing the circuit configuration of the starter controller according to the fourth embodiment. As shown in FIG. 9, the starter controller 21 of the present embodiment uses the ignition power source I.
G, the voltage detection unit 21A that detects each voltage of the power generation signal PW to determine the operating state of the engine, and the start signal S to the electric system inside the vehicle according to the determination result of the voltage detection unit 21A.
A start signal opening / closing unit 21B that cuts or releases the supply of T2 is provided.

The voltage detector 21A has an IG terminal 400a for inputting the ignition power source IG from the signal line 22,
PW terminal 40 for inputting the power generation signal PW from the signal line 14
0b, a resistor 402 for loading the voltage, and a PNP-type transistor 404. The start signal opening / closing unit 21B includes a backflow preventing diode 406 and a relay switch 408 that operates at "L" level, that is, minus control.

Next, the operation of the starter controller 21 will be described. Also in the fourth embodiment, the signal timing is set according to FIG. 7 as in the third embodiment. Therefore, the timing chart shown in FIG. 7 is referred to.

In the voltage detector 21A shown in FIG.
As shown in (position), ignition power supply IG
A signal of "H" level flows from the collector side of the transistor 404 with "H" and the power generation signal PW "L", and is input to the start signal opening / closing unit 21B. This activates the relay switch 408. When the relay switch 408 is closed, the start signal ST1 is closed and a signal path for transmitting the start signal ST1 to the start signal ST2 is formed.

When the start signal ST1 "H" is input to the start signal opening / closing section 21B, a similar signal "H" is supplied to the start signal ST2 via the relay switch 408.
Is output as The start signal ST2 activates the starter relay to start the starter motor.

When the engine is started in this way, power generation by the alternator is started and the PW of the voltage detector 21A is started.
The power generation signal PW (“H”) is input from the for-use terminal 400b. In the transistor 404, this power generation signal PW and IG
Ignition power supply IG input from the terminal 400a for
The voltage is canceled between the start signal switching unit 21 and
The voltage input to B becomes "L" level. The relay switch 408 is opened by this minus control.

In the relay switch 408, the open state is held until the cancellation is canceled. The engine is stopped at the same time when the input of the ignition power source IG is stopped, and the power generation of the alternator is also stopped, so that the above offset is canceled.

This fourth embodiment can also obtain the same effect as the above-mentioned third embodiment, and the number of parts can be reduced by providing the transistor 404 with a process for detecting that the engine is operating. be able to.

(Fifth Embodiment) In the fifth embodiment, the voltage difference between the battery voltage and the voltage supplied to the check lamp for notifying mechanical trouble or electric trouble reaches a predetermined value. When the engine is in operation, it detects that the engine is operating, and when it does not reach the specified value, it detects that the engine is not operating. Voltage cancellation between battery voltages can be used. No new circuit or device is added, and the number of parts can be reduced. Therefore, it is possible to prevent the starter motor from operating while the engine is operating by checking the energized state displayed on the check lamp.

Further, since the ignition power source IG, the starter signal ST of the starter motor, and the energizing signal for displaying the check lamp are connected to the respective signal lines for energizing, a connector is provided between the driving device and the connector. The connection is made by and can be freely attached and detached at any time. Therefore, it is possible to perform troubleshooting and fail safe by using the existing connection and making it detachable.

In the fifth embodiment, the starter control unit is configured by using the configurations of the starter control units of the second to fourth embodiments described above, and instead of connecting the signal line 14 shown in FIG. 5 to the alternator, the check is performed. A configuration in which the lamp is connected to a signal line that is energized is applied. Therefore, the illustration of the starter controller is omitted. In this embodiment, the engine check (ECHK) is used as the energization signal detected by the connection.
To use. For obtaining the energization signal ECHK, for example, the signal line 14 may be connected to the minus side of the warning lamp with a component such as an electrotap.

FIG. 10 is a block diagram showing an example of the connection method for detecting the energization signal in the fifth embodiment. In the figure, in the engine control computer 80,
Control of the entire engine is performed, and, for example, the engine check lamp 81 is turned on or the exhaust temperature check lamp 82 is turned on. These check lamps 81,
Lighting of 82 is controlled by turning on the ignition power source IG and checking the engine control computer 80. The engine control computer 80 has a signal line 8 for an engine check lamp 81.
3 and the signal line 84 for the exhaust temperature check lamp 82 are connected. The type of check lamp is not limited to this, and various types are prepared depending on the vehicle type and the like. In this embodiment,
As an example, the energization state of the engine check is detected.

Next, the operation will be described. FIG. 11 is the fifth
6 is a timing chart of various signals according to an example. The timing from to in the figure corresponds to FIG.
The engine check lamp 81 is turned on by the rising of the ignition power supply IG until the engine control computer 80 operates the engine to obtain a constant voltage. This is because the engine operates under the control of the engine control computer 80.

Also in the starter controller of this embodiment, the ignition power source IG becomes "H" and the start signal ST1 ("H") as in the second to fourth embodiments.
Is input, the start signal ST2 is also output as "H".

When the starter relay is activated by the "H" of the start signal ST2, the starter motor is activated and the engine is started. At this time, the engine control computer 80 sends an energization signal EC indicating the operation of the engine.
HK (“H”) is output. This energizing signal ECHK
Cancels the ignition power supply IG having the same voltage level, so that the voltage on the signal line 83 is canceled,
It becomes the "L" level. Therefore, the engine check lamp 81 that is lit turns off.

From then on, since the signal line 14 is connected to the signal line 83, even if the start signal ST1 becomes "H", the relay switch is operated by the relay switch as in the second to fourth embodiments. The start signal ST2 becomes "L".

In the fifth embodiment, since the protection device (second to fourth embodiments) applied to the alternator can be applied as it is, it can be applied to an automobile not equipped with the alternator. .

In the fifth embodiment, the energization signal ECHK for energizing the engine check lamp 81 is given as an example, but the same check lamp, that is,
It is not limited to this as long as the lamp is turned on when the ignition is turned on and turned off when the engine is operated.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 1. FIG.

FIG. 2 is a block diagram showing a circuit configuration of a protection device according to the first embodiment.

FIG. 3 is a timing chart of various signals according to the first embodiment.

FIG. 4 is an explanatory diagram showing, as an example, a positional relationship between various signals shown in FIG. 3 and keys on a key cylinder.

FIG. 5 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 3;

FIG. 6 is a block diagram showing a circuit configuration of a protection device according to a second embodiment.

FIG. 7 is a timing chart of various signals according to the second embodiment.

FIG. 8 is a block diagram showing a circuit configuration of a starter controller according to a third embodiment.

FIG. 9 is a block diagram showing a circuit configuration of a starter controller according to a fourth embodiment.

FIG. 10 is a block diagram showing an example of a wiring method for detecting an energization signal in the fifth embodiment.

FIG. 11 is a timing chart of various signals according to the fifth embodiment.

[Explanation of symbols]

10, 11 Protective device 12, 13, 19, 21 Starter control part 12A, 13A, 19A, 21A Voltage detection part (detection means, first to third detection means) 12B, 13B, 19B, 21B Start signal opening / closing part ( Cutting means, releasing means) 14, 20, 22, 24, 40, 42, 44 Signal line 18, 30, 32, 34 Connector

Further, there is a method of detecting the rotation pulse of the engine in order to detect the operation of the engine. In this case also, the same configuration as that of the generator (alternator) may be provided, and the voltage processing is performed. Is also the same.

[0105]

As described above, according to the first aspect of the invention, when the detected engine operating state indicates that the engine is operating, the supply of the start signal for operating the starter motor is cut off, During this period, when the engine is inactive, the cutting operation of the start signal is released, so once the engine starts, the start signal is not supplied to the starter motor even if a start signal is generated.
Useless starter motor operation is prevented during engine operation. Therefore, there is an effect that a starter motor protection device capable of protecting the starter motor can be obtained by not operating the starter motor while the engine is operating.

According to the invention of claim 2, the voltage on the signal line for energizing the ignition power source is detected, and when the voltage reaches a predetermined value, it is detected that the engine is operating,
Since it is configured to detect that the engine is not operating when it does not reach the predetermined value, it is possible to detect that the voltage of the ignition power supply rises to the voltage of the battery or higher when detecting the operating state of the engine. Available. Further, a new circuit or device is not added, and the number of parts can be set small. Therefore, it is possible to obtain a starter motor protection device capable of confirming the energization state of the ignition power supply and preventing the starter motor from operating during engine operation.

Further, according to the third aspect of the invention, since the ignition power source and the starter motor start signal are connected to the respective signal lines that are energized, the connector is connected to the driving device. Can be done at any time freely. Therefore, in addition to the effect of the invention of claim 1, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

Further, according to the invention of claim 4, when the voltage difference between the voltage of the battery and the voltage of the generator reaches a predetermined value, it is detected that the engine is operating, and the predetermined value is reached. Since it is configured to detect the non-operation of the engine when there is no engine, it is possible to use the cancellation of the voltage between the voltage of the generator and the voltage of the battery when power is generated when detecting the operating state of the engine. Further, a new circuit or device is not added, and the number of parts can be set small. Therefore, there is an effect that a starter motor protection device capable of confirming the power generation state of the generator and preventing the starter motor from operating during engine operation can be obtained.

Further, according to the invention of claim 5, since the ignition power supply, the start signal of the starter motor and the power generation signal of the generator are connected to the respective signal lines for energizing, respectively, a connector for driving is provided. Connections are made between the connectors, and you can freely attach and detach at any time. Therefore, in addition to the effect of the invention of claim 4, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

Further, according to the invention of claim 6, when the voltage difference between the voltage of the battery and the voltage applied to the indicator lamp reaches a predetermined value, it is detected that the engine is operating.
When the engine is not in operation when it has not reached the specified value, it is designed to detect that the engine is not operating.Therefore, the cancellation of the voltage between the voltage applied to the indicator lamp and the battery voltage is used to detect the engine operating status. can do. No new circuit or device is added, and the number of parts can be reduced. Therefore, there is an effect that a protective device for the starter motor can be obtained which can prevent the starter motor from operating while the engine is operating by checking the energized state displayed on the check lamp.

Further, according to the invention of claim 7, since the ignition power supply, the start signal of the starter motor, and the energizing signal of the display lamp are connected to the respective signal lines for energizing, respectively, a connector for connecting to the driving device is provided. Connections are made between the connectors, and you can freely attach and detach at any time. Therefore, in addition to the effect of the invention of claim 6, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

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[Procedure amendment]

[Submission date] August 2, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Patent application title: Starter motor protection device

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter motor protection device, and more particularly to a starter motor protection device for controlling a starter motor so that it does not operate while the engine is operating in a drive device such as a vehicle equipped with an engine.

[0002]

2. Description of the Related Art In a vehicle equipped with a prime mover such as a gasoline engine, a diesel engine, an LPG engine or an ethanol engine, when starting the engine,
Turn the ignition key to the start side to operate the starter motor. Normally, the torque generated by this starter motor is transmitted to the flywheel or drive plate of the engine by cranking to rotate the engine.

If the ignition key is turned to the start side while the engine is operating, an unpleasant sound is generated and the engine is likely to stall. This is a phenomenon that occurs when the pinion gear of the starter motor pops out and comes into contact with the gears of the flywheel and the drive plate, and the load reduces the engine speed.

As described above, it is common for anyone to accidentally turn the ignition key to the start side even when the engine is operating. In the case of a vehicle model where the engine sound is quiet, it is not possible to instantly determine whether the engine has started, and the ignition key may be mistakenly turned again.

At this time, it suffices to confirm the start of the engine through a meter on the display panel, for example, a tachometer, but the key operation for starting the engine is unknowingly performed as the operator gets used to it.

Therefore, the judgment as to whether or not the engine could be started often depends more on the sense of perceiving the auditory sense and the vibration than the sense of sight.

[0007]

As described above, when the ignition key is turned to the start side even when the engine is operating, the starter motor automatically operates and the starter motor, the flywheel, and the drive plate are burdened. Will be applied. There is a problem in that the life and durability of the starter motor, the flywheel, and the drive plate are reduced if such an incorrect key operation is repeated.

Further, when the driver or passenger is not familiar with the internal structure of the automobile, there is a fear that the unpleasant sound generated between the gears due to the erroneous key operation as described above is a trouble in the automobile itself. There was also a problem of giving the driver and passengers.

The present invention has been made in consideration of the above-mentioned problems, and provides a starter motor protection device capable of protecting the starter motor by not operating the starter motor during engine operation. The purpose is to

It is another object of the present invention to provide a starter motor protection device capable of confirming the energization state of the ignition power source and preventing the starter motor from operating during engine operation.

Further, in addition to the object of the invention of claim 1, the invention of claim 3 is a protection device for a starter motor which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

It is an object of the present invention to provide a starter motor protection device capable of confirming the power generation state of the generator and preventing the starter motor from operating during engine operation.

In addition to the object of the invention of claim 4, the invention of claim 5 is a starter motor protection device which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

A further object of the present invention is to provide a starter motor protection device capable of confirming the energized state indicated by a check lamp and preventing the starter motor from operating during engine operation. To do.

In addition to the object of the invention of claim 6, the invention of claim 7 is a protection device for a starter motor which enables troubleshooting and fail-safe by making it detachable by utilizing an existing connection. The purpose is to provide.

[0016]

In order to solve the above-mentioned problems, the starter motor protection device according to the invention of claim 1 is a starter motor when the detected operating state of the engine indicates that it is in operation. The configuration is such that the supply of the start signal for activating the start signal is cut off, and the cutting operation of the start signal is canceled when the non-operation is indicated during this period.

The starter motor protection device according to the second aspect of the present invention detects the voltage on the signal line for energizing the ignition power source, and when it reaches a predetermined value, detects that the engine is operating, The configuration is such that when the predetermined value is not reached, it is detected that the engine is not operating.

Further, the starter motor protection device according to the third aspect of the present invention has a structure in which the ignition power source and the connector for connecting to each signal line for supplying the start signal of the starter motor are respectively energized.

The starter motor protector according to the fourth aspect of the present invention detects that the engine is in operation when the voltage difference between the battery voltage and the generator voltage reaches a predetermined value, and determines the predetermined value. When the value of has not reached, it is configured to detect that the engine is not operating.

The starter motor protection device according to the invention of claim 5 has a structure in which a connector for connecting an ignition power source, a start signal of the starter motor, and a signal line for energizing the power generation signal of the generator are connected. Is.

Further, the starter motor protection device according to the invention of claim 6 detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage applied to the indicator lamp reaches a predetermined value. However, it is configured to detect that the engine is not operating when it does not reach the predetermined value.

The starter motor protector according to the invention of claim 7 has a connector for connecting an ignition power source, a starter motor start signal, and an indicator lamp energizing signal to respective signal lines for energizing the signal. Is.

[0023]

According to the first aspect of the present invention, the starter motor protection device cuts off the supply of the start signal for operating the starter motor when the detected engine operating state indicates that the engine is operating, and the starter motor is not activated during this period. When the inside is indicated, the cutting operation of the start signal is released, so once the engine starts, the start signal is not supplied to the starter motor even if the start signal is generated.
Useless starter motor operation is prevented during engine operation.

The starter motor protector according to the second aspect of the present invention detects the voltage on the signal line for energizing the ignition power source, and when it reaches a predetermined value, detects that the engine is in operation and determines the predetermined value. Since it is configured to detect that the engine is not operating when it has not reached the value of, the fact that the voltage of the ignition power supply rises to the battery voltage or higher when detecting the engine operating condition is used. it can. Further, a new circuit or device is not added, and the number of parts can be set small.

Further, the starter motor protector according to the third aspect of the present invention has the connector for connecting the ignition power supply and the start signal of the starter motor to the respective signal lines to be energized. The connector is used to connect and disconnect freely at any time.

The starter motor protector according to the fourth aspect of the present invention detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage of the generator reaches a predetermined value, and determines the predetermined value. Since it is configured to detect that the engine is not operating when it has not reached the value, it uses the cancellation of the voltage between the voltage of the generator and the voltage of the battery when generating power when detecting the operating state of the engine. be able to. Further, a new circuit or device is not added, and the number of parts can be set small.

Further, the starter motor protection device according to the invention of claim 5 has a constitution in which the ignition power source, the starter motor start signal, and the connector for connecting to each signal line for energizing the power generation signal of the generator are provided. A connector is connected to the drive unit so that the user can freely attach and detach at any time.

Further, the starter motor protection device according to the invention of claim 6 detects that the engine is in operation when the voltage difference between the voltage of the battery and the voltage supplied to the indicator lamp reaches a predetermined value. Since the configuration is such that the engine is not operating when it does not reach the specified value, it is possible to cancel the voltage between the voltage supplied to the indicator lamp and the voltage of the battery when detecting the engine operating condition. Can be used. No new circuit or device is added, and the number of parts can be reduced.

The starter motor protector according to the invention of claim 7 has a connector for connecting to each signal line for energizing the ignition power source, the starter motor start signal, and the indicator lamp energizing signal. A connector is connected to the drive unit so that the user can freely attach and detach at any time.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. (First Embodiment) In the first embodiment, even if the ignition key is mistakenly turned to the start side after the engine is started, the start signal of the starter motor is cut before the starter motor, and the starter motor during engine operation 2 is an example of a configuration for preventing the restart of the.

Regarding the above electrical control, the fact that the battery voltage is around 12V when the engine is stopped, and that the alternator, which is a generator when the engine starts, starts power generation and the voltage rises to a little over 14V, is utilized. Thus, the voltage difference between the voltages generated before and after the engine is started is detected. The start signal is cut according to the level of the voltage difference.

FIG. 1 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 1. FIG.
At the key cylinder 50, the signal lines 52, 54, 5
A female connector 60 connected via 6, 58 and a male connector 62 connected to the ends of signal lines 64, 66, 68, 70 from the electric system inside the automobile are connected to each other. Is. As shown in FIG. 1, the starter motor protection device 10 according to the present embodiment has a structure in which a connector connection is made between the female connector 60 and the male connector 62 so as to be interrupted.

The protection device 10 is connected to the starter control section 12 for controlling ON / OFF of the starter motor according to the operating state of the engine and the starter control section 12 via signal lines 20, 22, 24. One female connector 18, a first male connector 30 electrically connected to the first female connector 18, a second female connector 32 electrically connected to a male connector 62, and a female connector 60. And a second male connector 34 electrically connected to.

Female connector 60 and second male connector 3
4, the second female connector 32 and the male connector 62, and the first male connector 30 and the first female connector 18 are all capable of being electrically connected in a fitted state. Therefore, it is possible to freely and easily attach and detach the pair of connectors.

As a signal for operating the protection device 10 of this embodiment, an ignition power source IG which is a power source for the ignition system, an accessory power source ACC which is a power source for a clock, a car audio system, etc., and a regular power source which is a standby power source. AM and a start signal ST for instructing ON / OFF of starter motor start are used.

Regarding the signal lines, between the second female connector 32 and the second male connector 34, the signal lines 36, 38, 40 for transmitting the permanent power source AM, the accessory power source ACC, and the ignition power source IG are connected. To be done. Since the starter controller 12 controls ON / OFF of the start signal ST, a signal path for indirectly transmitting from the second male connector 34 to the second female connector 32 is provided.

The signal line for transmitting the start signal ST is divided into signal lines 42 and 44. One signal line 44 outputs the start signal ST from the second male connector 34 to the starter controller 1, so that one end is connected to the second female connector 34 and the other end is connected to the first male connector 30. It
The other signal line 42 is connected to the first male connector 30 at one end and to the second female connector 32 at the other end in order to output the start signal ST from the starter control unit 12 to the electric system inside the vehicle. . Hereinafter, the start signal ST flowing through the signal line 44 will be referred to as ST1 and the start signal ST flowing through the signal line 42 will be referred to as ST2.

Between the first female connector 18 forming a pair with the first male connector 30 and the starter controller 12, the signal lines 24 and 20 for transmitting the start signals ST1 and ST2, respectively, and the ignition described above. The signal line 22 for transmitting the power source IG is connected. A body ground wire 16 is connected to the starter control section 12 for grounding, and the body ground wire 16 is tightened together with a bolt of the vehicle body to be grounded.

Further, the key cylinder 50 and the female connector 6
Between 0 and the power supply AM, accessory power supply ACC,
Ignition power supply IG and signal lines 52, 54, 56 and 58 for transmitting start signal ST are connected.
Signal lines 64, 66, 68 and 70 for transmitting a permanent power supply AM, an accessory power supply ACC, an ignition power supply IG and a start signal ST are connected to a male connector 62 connected to an electric system inside the automobile.

The permanent power supply AM is a power supply supplied to the key cylinder 50 from the + pole of a battery (not shown). The ignition power supply IG is a power supply that energizes when the key inserted in the key cylinder 50 is turned to the ignition on position, and functions as a circuit power supply of the starter control unit 12.

In the connected state of the female connector 60 and the male connector 62, the start signal ST is turned on when the key inserted in the key cylinder 50 is turned to the start position, and a starter relay (not shown) is turned on. It is a signal for closing and starting the starter motor. In this embodiment, regarding the start signal ST, even if the start signal ST1 is on, the starter controller 12 is operating during engine operation.
As a result, the start signal ST is turned off, that is, the start signal ST2 is turned off, and the starter relay is also kept open.

As described above, the protection device 10 according to the present embodiment.
In order to control the operation of the starter relay that switches the starter motor on and off, the key cylinder 50 and the starter relay are connected so as to be interrupted.

FIG. 2 shows a starter controller 1 according to the first embodiment.
It is a block diagram which shows the circuit structure of 2. As shown in FIG. 2, the starter control unit 12 of the present embodiment detects the voltage of the ignition power source IG to determine the operating state of the engine, and the interior of the vehicle according to the determination result of the voltage detection unit 12A. The electric signal is provided with a start signal opening / closing unit 12B that cuts or releases the supply of the start signal ST2.

The voltage detector 12A includes a relay switch 100 which operates at 12V or more and a diode 1 for preventing backflow.
02, 104 and resistors 106, 10 for voltage drop
8, a variable resistor 110, and an NPN type transistor 1
12 and Zener diode 11 that operates at 12V or higher
4, the capacitors 116 and 118, and the NAND gate 12
With 0 and.

The start signal switching section 12B includes resistors 122 and 124 for voltage drop, NPN type transistors 126 and 128 similar to the transistor 112, and 12
And a relay switch 130 that operates at V or higher.

Next, the operation of the starter controller 12 will be described. FIG. 3 is a timing chart of various signals according to the first embodiment, and FIG. 4 is an explanatory diagram showing an example of the positional relationship between the various signals shown in FIG. 3 and the keys on the key cylinder. It should be noted that the same state is shown from the beginning to the end in correspondence with FIGS.

Regarding the key operation on the key cylinder 50, for example, in the case of a domestic car, the key is rotated right to start the engine. This will be described with reference to FIG. 4. When the key is inserted, the key is set to “OFF”, that is, the ignition off position. This "OFF"
At the stage, as shown in FIG. 3, all are at “L” level except for the standby power supply AM (“H” level). Where "L"
The level is 0V and the "H" level is 12V or higher.

Then, when the key is turned to the right, "AC
The key is set to "C", that is, the position of the accessory power supply ACC ON. At this "ACC" stage, as shown in FIG. 3, the accessory power supply ACC becomes "H" level. Thereby, for example, a radio can be turned on, an audio cassette or the like can be driven.

When the key is further turned to the right,
That is, the key is set at the position where the ignition power source IG is turned on. At this "ON" stage, the ignition power supply IG becomes "H" level as shown in FIG. As a result, power is supplied to the ignition system.

When the key is turned all the way to the right in this state,
The key is once returned to the "START" position, that is, to the "ON" position again when the engine start position is reached. As shown in FIG. 3, the start signal ST1 becomes "H" when the key is at the "START" position,
It returns to "L" when it returns to the "ON" position.

When the engine is not operating, the start signal ST1 ("H") is directly input to the starter relay as the start signal ST2 by the protective device 10 (starter control unit 12) to start the starter motor. it can. This starts the engine and puts it into operation. Even if the key is turned from "ON" to "START" again while the engine is operating and the start signal ST1 is "H", the start signal ST2 is set to "L" in the protection device 10 (starter controller 12). Is output.

Here, the circuit operation of the starter controller 12 will be described in detail. "OFF" position In this position, the relay switch 100 is not operated yet and is located on the terminal c side. As long as this state continues, the voltage detector 1
A path for supplying the ignition power supply IG to 2A is maintained. Similarly, the relay switch 130 does not operate and is located on the terminal a side. As a result, the signal line 24 for inputting the start signal ST1 and the signal line 20 for outputting the start signal ST2 are connected via the relay switch 130. Therefore, until the relay switch 130 is switched to the terminal b, the start signal ST1 and the start signal ST2 are at the same level.

Position of “ACC” Since only the accessory power supply ACC is activated at this position, there is no influence on the operation on the starter control unit 12. "ON" position In this position, the ignition power supply IG is supplied to the starter control unit 12 via the terminal c. The ignition power supply IG first flows in the order of the voltage detection unit 12A and the start signal opening / closing unit 12B. In the voltage detection unit 12A, the voltage level input to the NAND gate 120 by the variable resistor 110 and the transistor 112 is 12.5 to 14V.
It is variable between. Therefore, in the present embodiment, as an example, the voltage level reference is set to 13V.

At the "ON" stage, the ignition power source IG indicates the 12V voltage supplied from the battery. In the case of 12V, the voltage of up to 13V (ignition power supply IG) is cut by the circuit configuration of the variable resistor 110 and the transistor 112, so N
The output of the AND gate 120 becomes "L". in this case,
The relay switch 130 of the start signal opening / closing section 12B does not operate, and the start signal ST1 remains the start signal S.
It becomes T2.

Position of “START” When the key is turned to this position, the voltage detection unit 12A and the start signal opening / closing unit 12B operate in the same manner as in the case of first “ON”, so that the start signal ST1 is “H”. Flows as it is to the starter relay as the start signal ST2, and the starter motor operates. Then, the engine is started and the engine is in operation. As a result, a generator (for example, an alternator) starts power generation, and the ignition power source IG supplied from the battery changes from 12V to 13V.
Rise above V.

At this time, the voltage flowing through the voltage detector 12A becomes 13V or higher, and the output of the NAND gate 120 becomes "H". As a result, the relay switch 130 of the start signal opening / closing unit 12B operates, the switch switches from the terminal a to the terminal b, and the start signal ST1 becomes open. That is, the supply of the start signal ST1 to the starter relay is cut off.

At this time, the relay switch 100 also operates, and the switch is switched from the terminal c to the terminal d. As a result, the ignition power supply I
G is not supplied and flows to the start signal opening / closing unit 12B.
The diode 104 prevents the ignition power supply IG from flowing to the voltage detection unit 12A. By operating the relay switch 100 in this manner, unnecessary operation of the starter controller 12 can be avoided and malfunction can be prevented.

"START" position (re) Once the key is returned to the position of and is turned to the "START" position again, the start signal ST1 becomes "H" again. However, in the starter control 12, since the start signal ST1 is opened by the ignition power source IG of 13V or more indicating that the engine is operating, the start signal ST1 (“H”) cannot be transmitted to the start signal ST2, and the start signal ST1 The supply remains cut.

The circuit state of the starter control section 12 is such that the key is returned to the "ACC" position to deactivate the engine and the ignition power source IG is set to "L" (0
It can be canceled by setting V). That is, the relay switches 100 and 130 may be returned to the initial state.

As described above, according to the first embodiment, when the detected operating state of the engine indicates that the engine is operating, the supply of the start signal for operating the starter motor is cut off, and the operation is started during this period. When the inside is indicated, the supply of the start signal for activating the starter motor is cut off, and when it is indicated during the non-operation, the cutting operation of the start signal is canceled. Even if a start signal is generated, the start signal is not supplied to the starter motor, so that unnecessary operation of the starter motor is prevented during engine operation. Therefore,
The starter motor can be protected by not operating it while the engine is operating.

Since the ignition power source IG and the starter signal ST of the starter motor are connected to the respective signal lines for energizing, the connector is connected to the electric system inside the vehicle, and the connector can be freely connected at any time. Can be attached and detached. Therefore, it is possible to perform troubleshooting and fail safe by using the existing connection and making it detachable.

(Second Embodiment) In the second embodiment, when the voltage difference between the battery voltage and the generator (eg alternator) voltage (power generation signal PW) reaches a predetermined value, the engine Between the voltage of the generator and the voltage of the battery when power is generated when detecting the operating state of the engine by detecting the operating state and detecting that the engine is not operating when it does not reach the specified value. Voltage cancellation can be used. Further, since existing circuits can be used without adding a new circuit or device, the number of parts can be reduced. Therefore, it is possible to confirm the power generation state of the generator and prevent the starter motor from operating while the engine is operating.

Since the ignition power source IG, the starter signal ST of the starter motor, and the signal line PW of the generator are connected to the respective signal lines for energizing, the connector is connected to the drive unit. It is carried out and can be freely attached and detached at any time. Therefore,
By using existing wiring and making it detachable, troubleshooting and fail-safe are possible.

FIG. 5 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 3. In the figure, in the protection device 11 according to the second embodiment,
The configuration in which the signal line 14 for inputting the power generation signal PW of the alternator, which is a generator, is connected has the above-mentioned protection device 10.
It is a part different from. Note that the same configuration as in FIG.
The same numbers are assigned and the description is omitted. Regarding acquisition of the power generation signal PW from the alternator, for example, the signal line 1
4 may be connected to the negative side of the battery charge warning lamp with a component such as an electrotap.

FIG. 6 is a block diagram showing the circuit configuration of the protection device according to the second embodiment. As shown in FIG. 6, the starter control unit 13 of the present embodiment detects the voltages of the ignition power source IG and the power generation signal PW to determine the engine operating state, and the determination result of the voltage detection unit 13A. According to the above, a start signal opening / closing unit 13B that cuts or releases the supply of the start signal ST2 is provided to the electric system inside the vehicle.

The voltage detector 13A has an IG terminal 200a for inputting the ignition power source IG from the signal line 22,
PW terminal 20 for inputting the power generation signal PW from the signal line 14
0b, a diode 202 for preventing reverse current, resistors 204, 206 and 208 for voltage drop, an NPN type transistor 210, a capacitor 212, and a NAND gate 214.

The start signal opening / closing unit 13B has a resistor 216 for voltage drop and an N similar to the transistor 210.
It is provided with PN type transistors 218 and 220 and a relay switch 222 that operates at 12 V or higher.

Next, the operation of the starter controller 13 will be described. FIG. 7 is a timing chart of various signals according to the second embodiment. 7A to 7C show the key positions as in the first embodiment. Position of "OFF" In this position, the relay switch 222 of the start signal opening / closing unit 13B is not operated yet and is located on the terminal e side. As a result, the signal line 24 for inputting the start signal ST1 and the signal line 20 for outputting the start signal ST2 are connected via the relay switch 222. Therefore, until the relay switch 222 is switched to the terminal f, the start signal ST1 and the start signal ST2 are at the same level.

Position of “ACC” Since only the accessory power supply ACC is activated at this position, there is no influence on the operation on the starter controller 13. "ON" position At this position, the ignition power supply IG is supplied to the starter control unit 13 via the signal line 22. The ignition power source IG first flows in the order of the voltage detection unit 13A and the start signal opening / closing unit 13B. In the voltage detector 13A,
Since the input level of the NAND gate 214 is "H" of 12V supplied from the battery, the output level is "L".
Becomes Therefore, in the start signal opening / closing unit 13B, the relay switch 222 does not operate, the position on the terminal e side is held, and the start signal ST1 becomes the start signal ST2 as it is.

Position of "START" When the key is turned to this position, the voltage detection unit 13A and the start signal opening / closing unit 13B operate in the same manner as in the case of the first "ON", so that the start signal ST1 is at "H". Flows as it is to the starter relay as the start signal ST2, and the starter motor operates. Then, the engine is started and the engine is in operation. As a result, the generator (alternator) starts power generation, and the ignition power supply IG supplied from the battery rises from 12V to 13V or higher.

At this time, the voltage of the ignition power supply IG that has already been input rises to 13 V or higher and the voltage of 13 V or higher is input to the voltage detection unit 13A from the IG terminal 200a. Similarly, the power generation signal P from the alternator
W is input. The power generation signal PW is 0 V before the engine is operated because the power generation is started by the operation of the engine. Therefore, when the engine operates, the power generation signal PW
Has a voltage of 13 V or higher and is input from the PW terminal 200b.

Ignition power supply IG during engine operation
And the power generation signal PW have substantially the same voltage value. In the transistor 210, the ignition power supply IG and the power generation signal PW are canceled and grounded by utilizing the above-mentioned characteristic of having substantially the same voltage value. Therefore, the input of the NAND gate 214 becomes "L" and the output becomes "H". This "H" level signal is input to the start signal opening / closing unit 13B to operate the relay switch 222.

In the relay switch 130, the switch is switched from the terminal e to the terminal f, and the start signal ST1 becomes open. That is, the supply of the start signal ST1 to the starter relay is cut off.

Position of "START" (Re) Once the key is returned to the position of and is turned to the position of "START" again, the start signal ST1 becomes "H" again. However, the starter control unit 13 keeps the start signal ST1 open because the alternator continues to generate power during engine operation.
Since T1 (“H”) cannot be transmitted to the start signal ST2, the supply of the start signal ST1 remains cut.

As for the circuit state of the starter control section 13, the key is returned to the "ACC" position to deactivate the engine, and the ignition power source IG is set to "L" (0
It can be canceled by setting V) and stopping the power generation of the alternator. That is, the relay switch 222 may be returned to the initial state.

(Third Embodiment) In the second embodiment, the relay switch 222 of the starter controller 13 is operated by the plus control, but in the third embodiment described below, the relay switch of the starter controller is operated. It is operated by a minus control. The third
Similarly to the second embodiment, the starter control unit of the embodiment includes the ignition power supply IG, the start signal ST1 and the power generation signal PW as the input signals, and the start signal ST2 as the output signal.

FIG. 8 is a block diagram showing the circuit configuration of the starter controller according to the third embodiment. As shown in FIG. 8, the starter control unit 19 of the present embodiment uses the ignition power source I.
G, the voltage detection unit 19A that detects each voltage of the power generation signal PW to determine the operating state of the engine, and the start signal S to the electric system inside the vehicle according to the determination result of the voltage detection unit 19A.
A start signal opening / closing unit 19B that cuts or releases the supply of T2 is provided.

The voltage detector 19A has an IG terminal 300a for inputting the ignition power source IG from the signal line 22,
PW terminal 30 for inputting the power generation signal PW from the signal line 14
0b, a diode 302 for preventing backflow, and a relay switch 304 that operates at “L” level, that is, minus control. Start signal opening / closing section 19B
Includes a relay switch 306 that operates at "L" level, that is, minus control.

Next, the operation of the starter controller 19 will be described. In the third embodiment, the signal timing is set according to FIG. 7 as in the second embodiment. Therefore, the timing chart shown in FIG. 7 is referred to.

In the voltage detector 19A shown in FIG.
As shown in (position), the relay switch 304 is operated at the rising "H" of the ignition power supply IG.
The signal "H" is input to the start signal opening / closing section 19B when the relay switch 304 is closed, and the relay switch 306 is operated. By this series of operations, the start signal ST1 is closed and the start signal ST1 is
Is formed to the start signal ST2.

When the start signal ST1 "H" is input to the start signal opening / closing section 19B, a similar signal "H" is input to the start signal ST2 via the relay switch 306.
Is output as The start signal ST2 activates the starter relay to start the starter motor.

When the engine is started in this way, power generation by the alternator is started, and the PW of the voltage detector 19A is started.
The power generation signal PW (“H”) is input from the for-use terminal 300b. The voltage is canceled between the power generation signal PW and the ignition power source IG input from the IG terminal 300a,
The voltage becomes "L" level. The relay switch 304 is opened by this minus control. At the same time, the input of the relay switch 306 also becomes “L”, following the operation of the relay switch 304 and opening.

In the relay switches 304 and 306, the open state is maintained until the cancellation is canceled. The engine is stopped at the same time when the input of the ignition power source IG is stopped, and the power generation of the alternator is also stopped, so that the above offset is canceled.

In the third embodiment, not only the same effect as in the second embodiment described above is obtained, but one relay switch 304 is used as a relay of small electric power (for example, within 20 mA) and the other relay switch 306 is set to 12V. By using the DC power relay, it is possible to reduce the load on the starter control unit 19 and prevent malfunction.

(Fourth Embodiment) In the second and third embodiments, the relay switch of the starter control section is operated by the plus control and the minus control, but in the fourth embodiment described below, the starter control section is operated. The relay switch of is operated by the minus control by the transistor. The starter control unit of the fourth embodiment also inputs the ignition power source IG and the start signal ST as in the case of the second and third embodiments.
1, the power generation signal PW, and the output signal is the start signal ST2.

FIG. 9 is a block diagram showing the circuit configuration of the starter controller according to the fourth embodiment. As shown in FIG. 9, the starter controller 21 of the present embodiment uses the ignition power source I.
G, the voltage detection unit 21A that detects each voltage of the power generation signal PW to determine the operating state of the engine, and the start signal S to the electric system inside the vehicle according to the determination result of the voltage detection unit 21A.
A start signal opening / closing unit 21B that cuts or releases the supply of T2 is provided.

The voltage detector 21A has an IG terminal 400a for inputting the ignition power source IG from the signal line 22,
PW terminal 40 for inputting the power generation signal PW from the signal line 14
0b, a resistor 402 for loading the voltage, and a PNP-type transistor 404. The start signal opening / closing unit 21B includes a backflow preventing diode 406 and a relay switch 408 that operates at "L" level, that is, minus control.

Next, the operation of the starter controller 21 will be described. Also in the fourth embodiment, the signal timing is set according to FIG. 7 as in the third embodiment. Therefore, the timing chart shown in FIG. 7 is referred to.

In the voltage detector 21A shown in FIG.
As shown in (position), ignition power supply IG
A signal of "H" level flows from the collector side of the transistor 404 with "H" and the power generation signal PW "L", and is input to the start signal opening / closing unit 21B. This activates the relay switch 408. When the relay switch 408 is closed, the start signal ST1 is closed and a signal path for transmitting the start signal ST1 to the start signal ST2 is formed.

When the start signal ST1 "H" is input to the start signal opening / closing section 21B, a similar signal "H" is supplied to the start signal ST2 via the relay switch 408.
Is output as The start signal ST2 activates the starter relay to start the starter motor.

When the engine is started in this way, power generation by the alternator is started and the PW of the voltage detector 21A is started.
The power generation signal PW (“H”) is input from the for-use terminal 400b. In the transistor 404, this power generation signal PW and IG
Ignition power supply IG input from the terminal 400a for
The voltage is canceled between the start signal switching unit 21 and
The voltage input to B becomes "L" level. The relay switch 408 is opened by this minus control.

In the relay switch 408, the open state is held until the cancellation is canceled. The engine is stopped at the same time when the input of the ignition power source IG is stopped, and the power generation of the alternator is also stopped, so that the above offset is canceled.

This fourth embodiment can also obtain the same effect as the above-mentioned third embodiment, and the number of parts can be reduced by providing the transistor 404 with a process for detecting that the engine is operating. be able to.

(Fifth Embodiment) In the fifth embodiment, the voltage difference between the battery voltage and the voltage supplied to the check lamp for notifying mechanical trouble or electric trouble reaches a predetermined value. When the engine is in operation, it detects that the engine is operating, and when it does not reach the specified value, it detects that the engine is not operating. Voltage cancellation between battery voltages can be used. No new circuit or device is added, and the number of parts can be reduced. Therefore, it is possible to prevent the starter motor from operating while the engine is operating by checking the energized state displayed on the check lamp.

Further, since the ignition power source IG, the starter signal ST of the starter motor, and the energizing signal for displaying the check lamp are connected to the respective signal lines for energizing, a connector is provided between the driving device and the connector. The connection is made by and can be freely attached and detached at any time. Therefore, it is possible to perform troubleshooting and fail safe by using the existing connection and making it detachable.

In the fifth embodiment, the starter control unit is configured by using the configurations of the starter control units of the second to fourth embodiments described above, and instead of connecting the signal line 14 shown in FIG. 5 to the alternator, the check is performed. A configuration in which the lamp is connected to a signal line that is energized is applied. Therefore, the illustration of the starter controller is omitted. In this embodiment, the engine check (ECHK) is used as the energization signal detected by the connection.
To use. For obtaining the energization signal ECHK, for example, the signal line 14 may be connected to the minus side of the warning lamp with a component such as an electrotap.

FIG. 10 is a block diagram showing an example of the connection method for detecting the energization signal in the fifth embodiment. In the figure, in the engine control computer 80,
Control of the entire engine is performed, and, for example, the engine check lamp 81 is turned on or the exhaust temperature check lamp 82 is turned on. These check lamps 81,
Lighting of 82 is controlled by turning on the ignition power source IG and checking the engine control computer 80. The engine control computer 80 has a signal line 8 for an engine check lamp 81.
3 and the signal line 84 for the exhaust temperature check lamp 82 are connected. The type of check lamp is not limited to this, and various types are prepared depending on the vehicle type and the like. In this embodiment,
As an example, the energization state of the engine check is detected.

Next, the operation will be described. FIG. 11 is the fifth
6 is a timing chart of various signals according to an example. The timing from to in the figure corresponds to FIG.
The engine check lamp 81 is turned on by the rising of the ignition power supply IG until the engine control computer 80 operates the engine to obtain a constant voltage. This is because the engine operates under the control of the engine control computer 80.

Also in the starter controller of this embodiment, the ignition power source IG becomes "H" and the start signal ST1 ("H") as in the second to fourth embodiments.
Is input, the start signal ST2 is also output as "H".

When the starter relay is activated by the "H" of the start signal ST2, the starter motor is activated and the engine is started. At this time, the engine control computer 80 sends an energization signal EC indicating the operation of the engine.
HK (“H”) is output. This energizing signal ECHK
Cancels the ignition power supply IG having the same voltage level, so that the voltage on the signal line 83 is canceled,
It becomes the "L" level. Therefore, the engine check lamp 81 that is lit turns off.

From then on, since the signal line 14 is connected to the signal line 83, even if the start signal ST1 becomes "H", the relay switch is operated by the relay switch as in the second to fourth embodiments. The start signal ST2 becomes "L".

In the fifth embodiment, since the protection device (second to fourth embodiments) applied to the alternator can be applied as it is, it can be applied to an automobile not equipped with the alternator. .

In the fifth embodiment, the energization signal ECHK for energizing the engine check lamp 81 is given as an example, but the same check lamp, that is,
It is not limited to this as long as the lamp is turned on when the ignition is turned on and turned off when the engine is operated.

Further, there is a method of detecting the rotation pulse of the engine in order to detect the operation of the engine. In this case also, the same configuration as that of the generator (alternator) may be provided, and the voltage processing is performed. Is also the same.

[0105]

As described above, according to the first aspect of the invention, when the detected engine operating state indicates that the engine is operating, the supply of the start signal for operating the starter motor is cut off, During this period, when the engine is inactive, the cutting operation of the start signal is released, so once the engine starts, the start signal is not supplied to the starter motor even if a start signal is generated.
Useless starter motor operation is prevented during engine operation. Therefore, there is an effect that a starter motor protection device capable of protecting the starter motor can be obtained by not operating the starter motor while the engine is operating.

According to the invention of claim 2, the voltage on the signal line for energizing the ignition power source is detected, and when the voltage reaches a predetermined value, it is detected that the engine is operating,
Since it is configured to detect that the engine is not operating when it does not reach the predetermined value, it is possible to detect that the voltage of the ignition power supply rises to the voltage of the battery or higher when detecting the operating state of the engine. Available. Further, a new circuit or device is not added, and the number of parts can be set small. Therefore, it is possible to obtain a starter motor protection device capable of confirming the energization state of the ignition power supply and preventing the starter motor from operating during engine operation.

Further, according to the third aspect of the invention, since the ignition power source and the starter motor start signal are connected to the respective signal lines that are energized, the connector is connected to the driving device. Can be done at any time freely. Therefore, in addition to the effect of the invention of claim 1, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

Further, according to the invention of claim 4, when the voltage difference between the voltage of the battery and the voltage of the generator reaches a predetermined value, it is detected that the engine is operating, and the predetermined value is reached. Since it is configured to detect the non-operation of the engine when there is no engine, it is possible to use the cancellation of the voltage between the voltage of the generator and the voltage of the battery when power is generated when detecting the operating state of the engine. Further, a new circuit or device is not added, and the number of parts can be set small. Therefore, there is an effect that a starter motor protection device capable of confirming the power generation state of the generator and preventing the starter motor from operating during engine operation can be obtained.

Further, according to the invention of claim 5, since the ignition power supply, the start signal of the starter motor and the power generation signal of the generator are connected to the respective signal lines for energizing, respectively, a connector for driving is provided. Connections are made between the connectors, and you can freely attach and detach at any time. Therefore, in addition to the effect of the invention of claim 4, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

Further, according to the invention of claim 6, when the voltage difference between the voltage of the battery and the voltage applied to the indicator lamp reaches a predetermined value, it is detected that the engine is operating.
When the engine is not in operation when it has not reached the specified value, it is designed to detect that the engine is not operating.Therefore, the cancellation of the voltage between the voltage applied to the indicator lamp and the battery voltage is used to detect the engine operating status. can do. No new circuit or device is added, and the number of parts can be reduced. Therefore, there is an effect that a protective device for the starter motor can be obtained which can prevent the starter motor from operating while the engine is operating by checking the energized state displayed on the check lamp.

Further, according to the invention of claim 7, since the ignition power supply, the start signal of the starter motor, and the energizing signal of the display lamp are connected to the respective signal lines for energizing, respectively, a connector for connecting to the driving device is provided. Connections are made between the connectors, and you can freely attach and detach at any time. Therefore, in addition to the effect of the invention of claim 6, there is an effect that a protection device for a starter motor that enables troubleshooting and fail-safe by making it detachable by using an existing connection can be obtained.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 1. FIG.

FIG. 2 is a block diagram showing a circuit configuration of a protection device according to the first embodiment.

FIG. 3 is a timing chart of various signals according to the first embodiment.

FIG. 4 is an explanatory diagram showing, as an example, a positional relationship between various signals shown in FIG. 3 and keys on a key cylinder.

FIG. 5 is an external perspective view showing an embodiment of a starter motor protection device according to the invention of claim 3;

FIG. 6 is a block diagram showing a circuit configuration of a protection device according to a second embodiment.

FIG. 7 is a timing chart of various signals according to the second embodiment.

FIG. 8 is a block diagram showing a circuit configuration of a starter controller according to a third embodiment.

FIG. 9 is a block diagram showing a circuit configuration of a starter controller according to a fourth embodiment.

FIG. 10 is a block diagram showing an example of a wiring method for detecting an energization signal in the fifth embodiment.

FIG. 11 is a timing chart of various signals according to the fifth embodiment.

[Description of Reference Signs] 10,11 Protective device 12,13,19,21 Starter control unit 12A, 13A, 19A, 21A Voltage detection unit (detection means, first to third detection means) 12B, 13B, 19B, 21B Start signal opening / closing section (cutting means, releasing means) 14, 20, 22, 24, 40, 42, 44 Signal line 18, 30, 32, 34 Connector

Claims (7)

[Claims] 1. A protector for a starter motor installed in a drive device equipped with an engine started by a starter motor, comprising: a detector for detecting an operating state of the engine; In the case of, the cutting means for cutting the supply of the start signal for operating the starter motor, and the non-operating state being detected by the detection means while the supply of the start signal is cut by the cutting means, A protection device for a starter motor, comprising: a releasing means for releasing a cutting operation by the cutting means. 2. The drive device has a signal line for energizing an ignition power source, and the detection means detects that the engine is in operation when the voltage of the signal line reaches a predetermined value, 2. The non-operation of the engine is detected when the predetermined value is not reached.
Protective device for the starter motor described. 3. A connector which is detachably connected to a signal line of an ignition power source for supplying a power source for ignition and a signal line of a start signal for operating the starter motor. Item 1. A starter motor protection device according to item 1. 4. The drive device includes a battery that supplies power to the inside of the drive device, and a generator that generates electric power when the engine is started, and the detecting means detects the voltage of the battery. A detection means, a second detection means for detecting the voltage of the generator, and a third detection means for detecting a voltage difference between the voltages respectively detected by the first and second detection means. , When the voltage difference detected by the third detection means has reached a predetermined value, it is detected that the engine is operating, and when the voltage difference has not reached the predetermined value, it is detected that the engine is not operating. The protection device for a starter motor according to claim 1, wherein: 5. A signal line of an ignition power source for supplying a power source for ignition, a signal line of a start signal for operating the starter motor, and a signal line of a power generation signal indicating the voltage of the generator. The starter motor protection device according to claim 4, further comprising a connector that is freely connected. 6. The drive device has a battery for supplying power to the inside of the drive device and a display lamp for displaying a trouble state of a mechanical system and an electric system according to an operating state of the engine, and the detection means. Is a first detection means for detecting the voltage of the battery, a second detection means for detecting the voltage applied to the display lamp, and a voltage between the voltages detected by the first and second detection means. And a third detecting means for detecting the voltage difference of the engine. When the voltage difference detected by the third detecting means reaches a predetermined value, it is detected that the engine is operating and the predetermined The starter motor protection device according to claim 1, wherein when the engine has not reached the value, the non-operation of the engine is detected. 7. A detachable signal line for an ignition power source for supplying a power source for ignition, a signal line for a start signal for operating the starter motor, and a signal line for an energizing signal for energizing the display lamp. 7. The starter motor protection device according to claim 6, further comprising a connector that is freely connected.