JP4751679B2 - Vehicle power-off support system - Google Patents

Description

  The present invention relates to a vehicle power-off response system that copes with power interruption from a battery through an ignition switch while the vehicle is running.

  While the vehicle is running, the ignition switch is turned off by operating the power key, the ignition fuse connected in series to the ignition switch is blown, or the ignition switch wiring system is in poor contact, etc. If the power supply from the battery through the ignition switch is cut off, for example, the function of the vacuum booster of the brake cannot be secured, and the intended braking becomes difficult, or the function of the power steering function is reduced. It cannot be secured, and it is expected to affect the safe driving of the vehicle.

  As a method for dealing with such a situation, for example, a relay means is connected in parallel with the ignition switch, and at least one of a brake pedal, a clutch pedal, an accelerator pedal, a door handle for opening / closing a door, and a wheel is operated. An interlocking switch means for controlling the on / off operation of the relay means in conjunction with each other is provided. When the interlocking switch means is turned on, the relay means is turned on, and power is supplied from the battery to the braking-related electrical components without passing through the ignition switch. A sub-feed circuit that has been made possible is known (for example, see Patent Document 1).

Japanese Patent No. 3235218

  However, in the sub-feed circuit disclosed in Patent Document 1, the interlock switch means for turning on / off the relay means is used for mechanical components such as a brake pedal, a clutch pedal, an accelerator pedal, a door handle, and a wheel. Since it is provided, there is a concern that the installation becomes difficult. Moreover, since these mechanical components are frequently operated or driven, the interlocking switch means is also frequently turned on / off, so that it is difficult to obtain sufficient durability and reliability. There is concern about becoming.

  Further, even when power is normally supplied through the ignition switch, there is a concern that the battery is unnecessarily consumed because power is supplied from the battery to the relay means when the interlock switch means is turned on.

  Accordingly, an object of the present invention made in view of such points is to cut off the power supply through the ignition switch while the vehicle is running while being easy to install, excellent in durability and reliability, and minimizing power consumption. The object is to provide a vehicle power-off response system that can be used.

  The vehicle power-off response system according to claim 1, which achieves the above object, includes a sub-feeding means for selectively feeding power without passing through a current path including an ignition switch, and a vehicle speed detecting means for detecting the vehicle speed of the vehicle. And an energization state detection means for detecting an energization state of a current path including the ignition switch, and an operation of the auxiliary power supply means based on a vehicle speed signal from the vehicle speed detection means and an energization state signal from the energization state detection means. Power supply control means for controlling, wherein the power supply control means indicates that the energization state signal indicates a non-energization state and the vehicle speed signal exceeds the first threshold value set in advance when the vehicle speed signal exceeds a preset first threshold value. The sub-feeding means is driven until it becomes equal to or less than a preset second threshold value that is less than or equal to a threshold value, and the sub-feeding means passes the current path including the ignition switch Characterized by feeding without.

  According to a second aspect of the present invention, in the vehicle power-off response system according to the first aspect, the vehicle control device further includes a braking control unit that controls driving of the vehicle braking device. The vehicle is automatically decelerated by selectively driving the braking device via the braking control means.

  According to a third aspect of the present invention, in the vehicle power-off response system according to the second aspect, the power control means inputs a navigation information from the navigation system and is set in advance by the vehicle, for example, an automobile such as a highway. It is determined whether the vehicle is on a dedicated road or the like, and when the vehicle is at the place, automatic deceleration of the vehicle by the braking device via the braking control means is prohibited.

  According to a fourth aspect of the present invention, in the vehicle power-off response system according to any one of the first to third aspects, the vehicle has a warning unit that issues a warning to the inside and outside of the vehicle during the power feeding period of the auxiliary power feeding unit. Features.

  According to a fifth aspect of the present invention, in the vehicle power-off response system according to any one of the first to fourth aspects, the power feeding period by the sub power feeding means is stored as a history in a memory.

  According to the first aspect of the present invention, the energization state of the current path including the ignition switch and the vehicle speed signal are monitored to control the driving of the auxiliary power feeding means, so that the brake pedal, clutch pedal, accelerator pedal, door handle, There is no need to provide interlocking switches for machine components such as wheels. Therefore, it can be easily installed, and durability and reliability can be improved. In addition, when the current path including the ignition switch is in a non-energized state and the vehicle speed signal exceeds the first threshold value, power is supplied by driving the auxiliary power feeding means until the vehicle speed signal becomes equal to or less than the second threshold value equal to or less than the first threshold value. Therefore, useless power consumption can be suppressed and the life of the power source can be extended.

  According to the second aspect of the present invention, during the power supply period of the auxiliary power supply means, the braking device is selectively driven and controlled via the brake control means, and the vehicle is automatically decelerated, thus ensuring the safety of traveling. In addition, the driver can be easily informed of an abnormality in energization through the ignition switch, such as turning off the ignition switch, and prompt action can be promoted.

  According to the invention of claim 3, when the vehicle is on a preset place, for example, on an automobile-only road such as an expressway, the braking device via the braking control means even during the power feeding period by the sub power feeding means Since the automatic deceleration by the vehicle is prohibited, it is possible to ensure the safety of traveling on an automobile-only road or the like.

  According to the invention of claim 4, during the power feeding period by the sub power feeding means, an alarm is issued to the inside and outside of the vehicle by the warning means, so that the driver of the vehicle is not allowed to pass through the ignition switch such as turning off the ignition switch. It becomes possible to easily and surely notify the abnormality of energization, prompt prompt action, and alert the passengers of the surrounding vehicles.

  According to the invention of claim 5, by storing the power feeding period of the sub power feeding means as a history in the memory, it is possible to diagnose whether or not a power system failure has occurred later.

  Embodiments of a vehicle power-off response system according to the present invention will be described below with reference to FIGS.

(First embodiment)
FIGS. 1 to 3 show a first embodiment, FIG. 1 is a block diagram showing a schematic configuration of a vehicle power-off response system, and FIG. 2 is a circuit configuration diagram of an example of a sub-feeding means shown in FIG. FIG. 3 is a flowchart for explaining the operation of the first embodiment.

  As shown in FIG. 1, in the present embodiment, a sub power feeding unit 1 is provided, and the sub power feeding unit 1 is connected to a power source based on a vehicle speed signal from the vehicle speed detecting unit 2 and a power state signal from the power state detecting unit 3. Driving control is performed by a power control ECU 5 that is a control means, and an engine control ECU 7 that controls driving of the engine 6 and a brake that controls driving of the braking device 8 by the power control ECU 5 according to the driving of the auxiliary power feeding means 1. A brake control ECU 9 that is a control means, an in-vehicle alarm drive circuit 11 that drives and controls an alarm lamp 10 that is an alarm means, a vehicle control ECU 13 that drives and controls a hazard 12 that is also an alarm means, and a brake lamp relay 14 Control each one.

  For example, as shown in FIG. 2, the secondary power feeding means 1 includes a secondary power feeding having a relay contact 24 a of the secondary power feeding relay 24 on the battery 21 so as to bypass the series circuit of the fuse 22 and the ignition switch 23 connected to the battery 21. In addition to connecting the circuit 25, the relay coil 24b of the auxiliary power supply relay 24 is connected to the battery 21 via the switch circuit 26 that is driven and controlled by the power control ECU 5, and the switch circuit 26 is turned on to attach the auxiliary power supply relay 24. By energizing, that is, by energizing the relay coil 24b and turning on the relay contact 24a, power is supplied through the sub power feeding circuit 25.

  Further, the energization state detection means 3 is, for example, in FIG. 2, whether or not a current is flowing through the series circuit of the fuse 22 and the ignition switch 23 connected in parallel with the sub-feed circuit 25, that is, in an energized state or a non-energized state For example, using a photocoupler or the like.

  The operation of the vehicle power-off response system according to the present embodiment will be described below with reference to the flowchart shown in FIG.

  First, it is determined whether or not the current path including the fuse 22 and the ignition switch 23 is in an energized state based on the energized state signal from the energized state detecting means 3 (step S1). If the vehicle speed v is over a first threshold value Ref1 (for example, 20 Km / h) set in advance based on the vehicle speed signal from the vehicle speed detection means 2 if the process ends without being conducted, Is determined (step S2).

  Here, when the vehicle speed v is equal to or lower than the first threshold value Ref1 (v ≦ Ref1), it is determined that there is no problem even if the power is turned off, and the processing is ended without operating the power-off compatible system.

  On the other hand, when the vehicle speed v exceeds the first threshold value Ref1 (v> Ref1), the switch circuit 26 is turned on and the auxiliary power supply relay 24 is energized, whereby the auxiliary power supply circuit 25 is turned on. (Step S3), power is supplied to each part from the battery 21 through the sub power feeding circuit 25, and the engine 6 is driven and controlled by the engine control ECU 7 as usual. Further, the vehicle alarm driving circuit 11 is controlled to turn on or blink the warning lamp 10, and the vehicle control ECU 13 is controlled to perform warning on processing such as blinking the hazard 12 (step S4).

  Further, the brake control ECU 9 is controlled to drive the braking device 8, thereby starting an automatic deceleration process (step S5). This automatic deceleration process continues until the vehicle speed v becomes equal to or lower than the preset second threshold value Ref2 in the next step S6. During this automatic deceleration period, the brake lamp relay 14 is energized and a brake lamp (not shown) is turned on. Light up.

  The second threshold value Ref2 is set to be equal to or less than the first threshold value Ref1, and preferably set to a number km / h that can be regarded as a stopped state.

  Thereafter, when it is determined in step S6 that the vehicle speed v is equal to or lower than the second threshold value Ref2 (v ≦ Ref2), at that time, the switch circuit 26 is turned off, thereby deactivating the auxiliary power supply relay 24 and the auxiliary power supply circuit. 25 is turned off (step S7), the alarm off process is executed, the alarm lamp 10 and the hazard 12 are turned off (step S8), and the process of the power-off compatible system is terminated.

  Thus, in the present embodiment, the energization state of the current path including the ignition switch 23 and the vehicle speed v are monitored, and the ignition switch 23 is in a state where the vehicle speed v exceeds the first threshold value Ref1 (v> Ref1). When the current path including the current path is in a non-energized state, the auxiliary power feeding circuit 25 is turned on until the vehicle speed v is equal to or lower than the second threshold value Ref2 (v ≦ Ref2), and power is supplied to each part from the battery 21 and brake control is performed. Since the ECU 9 drives the braking device 8 to automatically decelerate the vehicle, the ignition switch 23 is turned off while the vehicle is traveling in a state where the vehicle speed v exceeds the first threshold value Ref1 (v> Ref1). Even if the power supply is turned off due to the fusing of the fuse 22, the poor contact of the wiring system of the ignition switch 23, etc., the vehicle should be stopped safely. It can become. In addition, it is not necessary to provide interlocking switches for mechanical components such as brake pedals, clutch pedals, accelerator pedals, door handles, and wheels as in the prior art, so that it can be easily installed, and durability and reliability are improved. be able to. In addition, during the ON period of the auxiliary power feeding circuit 25, the vehicle speed from the state (v> Ref1) in which the current path including the ignition switch 23 is in a non-energized state and the vehicle speed v exceeds the first threshold value Ref1 as described above. Since it is a period until v becomes equal to or less than the second threshold value Ref2 (v ≦ Ref2), wasteful power consumption by the relay coil 24b can be suppressed, and the life of the battery 21 can be extended.

  Further, during the ON period of the auxiliary power supply circuit 25, the alarm lamp 10 and the hazard 12 are driven to give an alarm, so that the driver of the vehicle is ignited in combination with the automatic deceleration of the vehicle. An abnormality in energization through the ignition switch 23, such as turning off the switch 23, can be easily and reliably informed, prompt prompt action can be taken, and attention can be given to occupants of surrounding vehicles. .

(Second Embodiment)
4 and 5 show a second embodiment. FIG. 4 is a block diagram showing a schematic configuration of a vehicle power-off response system. FIG. 5 is a flowchart for explaining the operation of the second embodiment.

  In the present embodiment, as shown in FIG. 4, when the vehicle has a navigation system 4, navigation information from the navigation system 4 is supplied to the power supply control ECU 5 and preset based on the navigation information. The automatic deceleration process is not performed when the place, for example, the vehicle is on an automobile-only road such as an expressway, and the other configuration is the same as that of the first embodiment.

  Therefore, in the present embodiment, as shown in FIG. 5, when it is determined in step S2 of FIG. 3 that the vehicle speed v exceeds the first threshold value Ref1 (v> Ref1), the navigation system 4 Based on the navigation information, it is determined whether or not the current vehicle position is on an automobile exclusive road such as an expressway (step S11). If the vehicle position is on an automobile exclusive road, the vehicle speed v is equal to or less than a second threshold value Ref2. The sub-feed circuit 25 is kept on until (v ≦ Ref2) (step S12), and when the vehicle speed v becomes equal to or lower than the second threshold value Ref2 (v ≦ Ref2), the steps S7 and S8 in FIG. The processing is executed to turn off the auxiliary power feeding circuit 25, and the warning lamp 10 and the hazard 12 are turned off to finish the processing of the power-off compatible system.

  On the other hand, if it is determined in step S11 that the vehicle is not on an automobile road, the vehicle speed v is equal to or lower than the second threshold value Ref2 (v2) in steps S5 and S6, as in the first embodiment. The automatic deceleration process is executed until ≦ Ref2), and when the vehicle speed v becomes equal to or lower than the second threshold value Ref2 (v ≦ Ref2), the processes of Step S7 and Step S8 are executed to Exit.

  As described above, in the present embodiment, during the ON period of the auxiliary power feeding circuit 25, based on the navigation information from the navigation system 4, when the vehicle is not on an automobile road such as an expressway, the brake control ECU 9 Since the braking device 8 is driven to automatically decelerate the vehicle, for example, when the vehicle is on an automobile road, automatic deceleration is not performed. In addition to the effects of the first embodiment, Driving safety according to the road type can be ensured.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of invention. For example, in the first embodiment, when the auxiliary power feeding circuit 25 is turned on, the vehicle speed v is automatically decelerated until the vehicle speed v is equal to or lower than the second threshold value Ref2 (v ≦ Ref2). The operation may be left to the driver's intention, and the sub-feed circuit 25 may be turned on until the vehicle speed v is equal to or lower than the second threshold value Ref2 (v ≦ Ref2). The on / off control of the sub power feeding circuit 25 is not limited to the configuration using the sub power feeding relay 24 and the switch circuit 26, but can be configured to be performed by connecting a semiconductor switch to the sub power feeding circuit 25. Further, the auxiliary power feeding circuit 25 is not limited to being connected to the same battery 21 as the ignition switch 23 but can be connected to a dedicated separate power source. Further, the alarm means in the vehicle is not limited to lighting or blinking of the alarm lamp 10, but can also be alarmed by voice or buzzer. In addition, the power supply period by the sub power supply means can be stored as a history in the memory of this system. Thus, by storing the power supply period of the sub power supply means as a history in the memory of the present system, it is possible to diagnose whether or not a power supply system has failed later.

1 is a block diagram showing a schematic configuration of a vehicle power-off response system according to a first embodiment of the present invention. It is a circuit block diagram of an example of the sub electric power feeding means shown in FIG. It is a flowchart explaining operation | movement of 1st Embodiment. It is a block diagram which shows schematic structure of the power-off corresponding | compatible system of the vehicle which concerns on 2nd Embodiment of this invention. It is a flowchart explaining operation | movement of 2nd Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sub power supply means 2 Vehicle speed detection means 3 Current supply state detection means 4 Navigation system 5 ECU for power supply control (power supply control means)
6 Engine 7 Engine control ECU
8 Braking device 9 Brake control ECU (braking control means)
10 Alarm lamp (alarm means)
11 Car interior warning drive circuit 12 Hazard (alarm means)
13 Vehicle control ECU
14 Brake lamp relay 21 Battery 22 Fuse 23 Ignition switch 24 Sub-feed relay 24a Relay contact 24b Relay coil 25 Sub-feed circuit 26 Switch circuit

Claims (5)

Sub-feeding means for selectively feeding power without passing through a current path including an ignition switch;
Vehicle speed detecting means for detecting the vehicle speed of the vehicle;
Energization state detecting means for detecting an energization state of a current path including the ignition switch;
Power control means for controlling the operation of the auxiliary power feeding means based on a vehicle speed signal from the vehicle speed detection means and an energization state signal from the energization state detection means,
When the energization state signal indicates a non-energization state and the vehicle speed signal exceeds a preset first threshold value, the power control means has a vehicle speed signal equal to or less than a preset second threshold value that is less than or equal to the first threshold value. The auxiliary power supply means is driven until the electric power is supplied to the auxiliary power supply means without passing through the current path including the ignition switch. Having braking control means for driving and controlling the braking device of the vehicle;
2. The power supply control unit according to claim 1, wherein the power supply control unit selectively drives and controls the braking device via the braking control unit to automatically decelerate the vehicle during a power feeding period of the sub power feeding unit. Vehicle power-off support system.   The power control means inputs navigation information from the navigation system, determines whether or not the vehicle is in a preset location, and when the vehicle is in a preset location, 3. The vehicle power-off response system according to claim 2, wherein automatic deceleration of the vehicle by the braking device is prohibited.   The vehicle power-off response system according to any one of claims 1 to 3, further comprising a warning unit that issues a warning to the inside and outside of the vehicle during the power feeding period of the sub power feeding unit. The vehicle power-off response system according to any one of claims 1 to 4, wherein a power supply period of the sub power supply means is stored as a history in a memory.

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