JP4395162B2 - Vehicle starter motor control device - Google Patents

Description

  The present invention includes a starter motor that starts an engine, a brake operation detection unit that detects a brake operation by a driver, a starter switch that is operated by a driver to activate the starter motor, and a brake operation that is performed by the brake operation detection unit. And a control means for operating the starter motor when a starter switch is operated.

  Generally, a rotary switch is used as a key switch of a vehicle, and a power supply state is switched by inserting and rotating a corresponding key. For example, if the key is rotated to the right from the OFF position where the key has been inserted, it switches to the ACC position (accessory position) for supplying power to the audio equipment, etc., and if the key is further rotated to the right, the engine operating state is maintained. When the key is further rotated to the right from there, the starter motor is switched to the ST position (starting position) where the starter motor is operated while the key is held at that position.

  When the key is released after the engine is started, the key automatically returns from the ST position to the ON position, and when the key is rotated counterclockwise, the key is switched to the ACC position and the engine is stopped. When it is rotated to the OFF position, it is possible to switch to the OFF position and remove the key. Accordingly, when the key is removed, the power supply state is always in the OFF position and does not remain in the ACC position.

A vehicle power supply control device that switches the power supply state by operating a push button switch without using the above-described conventional key switch is known from Patent Document 1 below. This vehicle power supply control device includes a push button switch that is activated by the operation of a driver carrying an authentication element such as a chip card or a transponder. When the push button switch is pressed from the OFF position, the switch is switched to the ACC position. When the push button switch is pressed from the ACC position, it switches to the ON position. The state where the push button switch is continuously pressed from the ON position is the ST position. When the push button switch is released from the ST position, the switch is switched to the ON position. When the switch is pressed, the position is switched to the ACC position, and when the push button switch is pressed from the ACC position, the position is switched to the OFF position.
JP 2000-85533 A

  By the way, when the starter motor is operated using this type of push button switch, to prevent the vehicle from popping out, “the brake pedal is depressed” and “the shift position is set to the parking position (or neutral position). If the two conditions of “something” are not satisfied, the operation of the starter motor is prohibited.

  However, if the brake switch that detects that the brake pedal is depressed fails, the electronic control unit cannot confirm that the brake pedal is depressed, so even if the brake pedal is actually depressed, Operation of the starter motor is prohibited, and the engine cannot be started, and convenience may be greatly impaired.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to enable the engine to be started by driving the starter motor after confirming safety even when the brake operation detecting means is abnormal.

In order to achieve the above object, according to the first aspect of the present invention, there is provided a starter motor for starting an engine, a brake operation detecting means for detecting a brake operation by a driver, and the starter operated by a driver. A starter switch for operating the motor, a parking position sensor for detecting the parking position of the automatic transmission, and the brake operation detecting means detect the brake operation, and the parking position sensor detects that the shift position is at the parking position. , and also in the starter motor control device for a vehicle with a control device for activating the starter motor when the starter switch is operated, the shift position of the automatic transmission parkin A possible ON / OFF operation by only OPERATION who when in position, said separate independent switching means and starter switch is provided on the shift lever of the automatic transmission, the control means, the parking position sensor when the switch means in a state where the shift position is detected to be in the parking position is Ru multiple times oN / OFF operation, even without brake operation is detected by the brake operation detecting means, operation of the starter switch A starter motor control device for a vehicle is proposed, which operates the starter motor.

  The electronic control unit 15 of the embodiment corresponds to the control means of the present invention, the push button switch 16 of the embodiment corresponds to the starter switch of the present invention, and the brake switch 17 of the embodiment corresponds to the brake of the present invention. Corresponding to the operation detection means, the P-PIN switch 19 of the embodiment corresponds to the switch means of the present invention.

According to the first aspect of the present invention, when the brake operation detecting means detects that the driver is operating the brake, the starter motor is activated to start the engine when the driver operates the starter switch. If the brake operation detection means does not operate normally, it is unclear whether the driver is operating the brake, so even if the starter switch is operated, the starter motor does not operate and the engine cannot be started. However, when the engine cannot be started , it is turned ON / OFF only when the shift position of the shift lever is at the parking position while the parking position sensor detects that the shift position is at the parking position. When the driver operates the switch means that can be operated more than once (that is, when the driver confirms that the shift position is in the parking position by a spontaneous operation), the brake operation is detected by the brake operation detection means. Even if it is not detected, the starter motor can be operated by operating the starter switch, so that the engine can be started without any problem even if the brake operation detection means becomes abnormal, and at that time the shift position is the parking position. To be in Since the, it is possible to reliably prevent unexpected movement, not of the vehicle. As a result, even when the brake operation detecting means is abnormal, the engine can be started by driving the starter motor after confirming safety.

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

  1 to 5 show an embodiment of the present invention. FIG. 1 is a block diagram showing the configuration of a starter motor control device for a vehicle. FIG. 2 is an explanatory diagram of the function of a P-PIN switch. FIG. FIG. 4 is a time chart for explaining the operation of the engine start in a normal state, and FIG. 5 is a time chart for explaining the operation of the engine start in an abnormal state.

  As shown in FIG. 1, the vehicle has a first device group 11 such as an engine ignition control device and an automatic transmission shift control device that are indispensable for maintaining traveling, and an acoustic device, an air conditioner, and a navigation system other than the first device group 11. , And a second device group 12 such as a power window and a power seat. The first and second device groups 11 and 12 are supplied with power from the battery 13 via the switching means 14. The switching means 14 includes a first power supply state A (ON position) in which power is supplied to both the first device group 11 and the second device group 12 simultaneously, and a second power supply state B (in which power is supplied only to the second device group 12. ACC position) and the third power supply state C (OFF position) in which power supply to the first device group 11 and the second device group 12 is cut off can be selected.

  The electronic control unit 15 includes a push button switch 16 that is operated by the driver, a brake switch 17 that detects depression of the brake pedal by the driver, a parking position sensor 18 that detects a parking position of the automatic transmission, and an automatic transmission. A P-PIN switch 19 provided on the shift lever is connected to the electronic control unit 15 based on signals from the push button switch 16, brake switch 17, parking position sensor 18 and P-PIN switch 19. Controls the operation of the switching means 14 and the starter motor 20.

  For example, when the shift lever is shifted from the reverse position to the parking position, the shift lever button is pressed and operated, and the P-PIN switch 19 is operated in conjunction with the operation of the shift lever button.

  As shown in FIG. 2, when the shift position is in the drive position, neutral position or reverse position, the output of the parking position sensor 18 is OFF, and when the shift position is in the parking position, the output of the parking position sensor 18 is ON. become. The P-PIN switch 19 is normally ON, and is OFF only while the shift lever button is pressed at the parking position. Therefore, when shifting from the reverse position to the parking position while pressing the shift lever button, the P-PIN switch 19 is switched from ON to OFF at the moment of switching to the parking position, and then the driver releases the shift lever button. The P-PIN switch 19 returns from OFF to ON.

  FIG. 3 shows the function of the push button switch 16 for switching the first power supply state A, the second power supply state B, and the third power supply state C, and cuts off the power supply to the first device group 11 and the second device group 12. When the push button switch 16 is pressed from the third power supply state C (OFF position), it switches to the second power supply state B (ACC position) in which power is supplied only to the second device group 12, and the push button is switched from the second power supply state B. Pressing the switch 16 switches to the first power supply state A (ON position) in which power is supplied to both the first device group 11 and the second device group 12. If the push button switch 16 is continuously pressed from the first power supply state A, the starter motor 20 operates during that time to start the engine (ST position).

  However, when the shift position of the automatic transmission is not in the parking position in the second power supply state B, even if the push button switch 16 is pressed, the first power supply state A is not switched and the second power supply state B is maintained. Further, in the first power supply state A, when the automatic transmission shift position is not in the parking position or when the brake switch 17 is OFF, the push button switch 16 may be kept pressed to prevent the vehicle from popping out. The starter motor 20 does not operate.

  When the push button switch 16 is released after the engine is started, it automatically returns to the first power state A, and when the push button switch is pressed from the first power state A, it switches to the second power state B, and the second power state B When the push button switch 16 is pressed, the automatic transmission shifts to the third power state C when the shift position of the automatic transmission is at the parking position, and continues to the second power state B when the shift position is not at the parking position. Further, when the push button switch is pressed from the first power supply state A, when the shift position of the automatic transmission is in the parking position and the vehicle is stopped (vehicle speed 0 km / h), the second power supply state B is skipped. Switch to the third power supply state C.

  Switching between the first power supply state A, the second power supply state B, and the third power supply state C is performed when the electronic control unit 15 that receives a signal from the push button switch 16 operates the switching means 14.

  In the description of FIG. 3, the determination that the shift position is at the parking position is performed using both the output of the parking position sensor 18 and the output of the P-PIN switch 19 in combination as described with reference to FIG. 2.

  By the way, in the first power state A, when the brake switch 17 is ON and the shift position of the automatic transmission is in the parking position, the starter switch 16 can be started by continuing to push the push button switch 16 because there is no risk of the vehicle jumping out. The motor 20 is activated and the engine is started.

  However, in such a system, if the brake switch 17 is broken and it cannot be determined whether or not the driver is stepping on the brake pedal, the starter motor 20 becomes inoperable and the engine cannot be started. Therefore, there is a problem that convenience is impaired. Therefore, in the present embodiment, the starter motor 20 is configured to be operable when the driver confirms that the shift position of the automatic transmission is in the parking position by a spontaneous operation.

  That is, if the brake switch 17 fails, for example, the shift position is in the parking position in the first power supply state A, and the starter motor 20 does not operate even if the driver operates the push button switch 16 while operating the brake. The driver notices an abnormality. When the driver who notices an abnormality turns on and off the P-PIN switch 19 a plurality of times (twice in the embodiment) by pressing the shift lever switch, the electronic control unit 15 has a failure in the brake switch 17. In addition, since the operation of the starter motor 20 is permitted, the engine E can be started for the time being by continuously pressing the push button switch 16. At this time, since the shift position is guaranteed to be in the parking position, there is no possibility that the vehicle will jump out even if the engine is started.

  Hereinafter, an example of the action at the start of the engine will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a time chart for explaining the operation during normal operation. When the power state is the first power state A, the shift position is the parking position, and the brake switch 17 is normal, the driver at time t1. When the brake pedal is depressed, the brake switch 17 is turned ON. When the driver presses the push button switch 16 at time t2, the starter motor 20 is activated while the button is being pressed, the engine is started at time t3, and the push button is pressed at time t4. When the switch 16 is released, the starter motor 20 stops.

  FIG. 5 is a time chart for explaining the action at the time of abnormality. When the power state is the first power state A, the shift position is the parking position, and the brake switch 17 is abnormal, the driver at time t5. Even if the brake pedal is depressed, the brake switch 17 remains OFF. Even if the driver who does not notice the abnormality presses the push button switch 16 at time t6, the starter motor 20 does not operate, and if the driver presses the push button switch 16 again at time t7, the starter motor 20 does not operate. When the driver who notices the abnormality presses the shift lever switch at time t8 to turn on / off the P-PIN switch 19, and further presses the shift lever switch again at time t9 to turn on / off the P-PIN switch 19, the starter motor 20 When the driver pushes the push button switch 16 at time t10, the starter motor 20 is actuated while being pushed, the engine starts at time t11, and when the push button switch 16 is released at time t12, the starter motor 20 is activated. Stops.

  If the driver notices an abnormality, the push button switch 16 is operated directly after the P-PIN switch 19 is operated twice without operating the push button switch 16 at time t6 and time t7 in FIG. To operate the starter motor 20.

  The embodiments of the present invention have been described above, but various design changes can be made without departing from the scope of the present invention.

  For example, in the embodiment, the push button switch 16 is exemplified as the starter switch of the present invention, but the form of the starter switch is not limited to the push button switch 16.

  Further, the brake operation detecting means of the present invention is not limited to the brake switch 17 of the embodiment, and may detect the brake fluid pressure due to the brake operation.

  Further, the switch means of the present invention is not limited to the P-PIN switch 19 of the embodiment, but is a switch that can be turned ON / OFF by the driver's operation when the shift position is at the parking position, for example, the handle at the parking position. It may be a switch that outputs a signal for operating the locking device.

  In the embodiment, when the P-PIN switch 19 is turned ON / OFF twice when the brake switch 17 is abnormal, the starter motor 20 can be operated. However, the number of times is not limited to two, and may be plural.

Block diagram showing the configuration of a starter motor control device for a vehicle Illustration of P-PIN switch function Explanatory diagram of push button switch functions Time chart explaining the operation of engine start under normal conditions Time chart explaining the effect of engine start at the time of abnormality

15 Electronic control unit (control means)
16 Push button switch (starter switch)
17 Brake switch (brake operation detection means)
18 parking position sensor 19 P-PIN switch (switch means)
20 Starter motor

Claims (1)

A starter motor (20) for starting the engine;
Brake operation detecting means (17) for detecting a brake operation by the driver;
A starter switch (16) operated by a driver to operate the starter motor (20);
A parking position sensor (18) for detecting the parking position of the automatic transmission;
When a brake operation is detected by the brake operation detecting means (17), a shift position is detected by the parking position sensor (18), and the starter switch (16) is operated. In a vehicle starter motor control device comprising a control means (15) for operating the starter motor (20),
A possible ON / OFF operation by only OPERATION user when the shift position of the automatic transmission is in a parking position, said separate independent switching means and starter switch (16) (19), the automatic transmission shift lever Provided in
Wherein said control means (15), when said by the parking position sensor (18) in a state where the shift position is detected to be in the parking position switch means (19) Ru multiple times ON / OFF operation, the brake A starter motor control device for a vehicle, wherein the starter motor (20) is operated by operating the starter switch (16) even if no brake operation is detected by the operation detecting means (17).

Images