JPH11263179A - On-vehicle control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the power consumption of an on-vehicle control device to perform operational control of on-vehicle electric equipment on the basis of different car conditions. SOLUTION: From a battery, power is supplied at all times to a controller 11 of an on-board control device 4. When there is no need to operate electric equipment 13, the normal processing for operational control of the electric equipment 13 by the controller 11 on the basis of different car conditions is stopped and thereby power saving is carried out. Thus the power consumption of the controller 11 is reduced. When a need to operate the electric fittings 13 arises, the power saving mode is disengaged, and it is made practicable so that the controller 13 is restituted to the normal processing condition immediately.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle control device for operating electric components mounted on a vehicle.

[0002]

2. Description of the Related Art In recent years, various electric components are mounted on automobiles. In order to control the operation of these on-vehicle electric components, an on-vehicle control device including an electronic circuit mainly including a microcomputer is widely used. Such an in-vehicle control device outputs a control signal to a drive circuit of an electrical component based on various vehicle states detected by devices mounted on the vehicle,
A controller device is provided for controlling the operation of the electrical components. The in-vehicle control device including the controller device is driven by receiving power from an in-vehicle power supply such as a battery.

Usually, power is supplied only from an in-vehicle power supply via an ignition switch to this on-vehicle control device. Therefore, when the ignition switch is off, the controller device of the on-vehicle control device does not operate, and as a result, Could not be activated.

Therefore, when the electric component is a device related to braking, if the ignition switch is turned off before the vehicle completely stops (immediately before stopping),
When it is necessary to stop the operation of the vehicle when the ignition switch is in the off state, or when the ignition switch fails and becomes off while the vehicle is running, power is supplied to the controller device of the onboard control device. Therefore, there is a problem that the electrical components related to braking cannot be operated, and the vehicle cannot be braked.

In order to solve such a problem, power supply to the controller of the vehicle-mounted control device is connected not only from the vehicle-mounted power supply via the ignition switch but also to the vehicle-mounted power supply in parallel with the ignition switch. There has been one that can be performed via relay means.

In this apparatus, the relay means operates a movable part which is indispensable for the operation stop operation of the vehicle (for example, operation of depressing a brake pedal, operation of an accelerator pedal, opening / closing of a door, detection of rotation of wheels, etc.). ) Is directly linked to the ON state, and after the ON state is maintained, the ON state is maintained until the operation of the movable part which is indispensable for the operation stop operation of the vehicle is released, and the operation of the movable part is released. It is configured to be turned off in conjunction with the operation. Thus, when the movable part indispensable for the operation for stopping the operation of the vehicle is operated, the electric components mounted on the vehicle can be operated even if the ignition switch is turned off.

On the other hand, as another conventional technique, a controller device of a vehicle-mounted control device is always connected to a vehicle-mounted power supply without passing through an ignition switch, and at least only the controller device is always in a driving state without being changed. In some cases, even when the ignition switch is turned off, electrical components mounted on the vehicle can be operated.

In this on-vehicle control device, even when the ignition switch is off, the controller device of the on-vehicle control device is in a state where power is supplied from the on-vehicle power supply, so that the ignition switch is turned on and off. Irrespective of this, the controller device can be constantly maintained in a state in which the electrical components can be operated based on various vehicle states, that is, a full drive state.

[0009]

However, in the above-mentioned prior art, the relay device provided with the relay means turns the relay means on and off in conjunction with the operation of the movable part which is indispensable for the operation stop operation of the vehicle. A self-holding circuit for holding and a shut-off circuit for turning off the relay means are required, resulting in an increase in cost.

Further, when the ignition switch and the relay device are turned off, the controller device is not supplied with electric power, and thereafter, the relay device is turned on by an operation of a movable portion which is indispensable for the operation stop operation of the vehicle. Even if power is supplied to the controller device, it is necessary to first perform the initialization processing of the microcomputer constituting the controller device, and unless this initialization processing is completed, the controller device must control the operation of the electrical components. Could not. Therefore, even if the relay means is turned on by the operation of the movable part which is indispensable for the operation stop operation of the vehicle and power is supplied to the controller device, it takes time until the electric components are actually operated. was there.

Further, in the above-mentioned prior art in which the controller device of the on-vehicle control device is always connected to the on-vehicle power supply without passing through the ignition switch, and only the controller device is constantly driven, the controller device is provided with an ignition device. Even when the switch is off,
Power is supplied by the on-board power supply, and the full ignition state is maintained, which is the same as when the previous ignition switch was on, so if the ignition switch is off for a long period of time, the power consumption by the controller device can be ignored. However, there is a problem that a burden is imposed on the vehicle-mounted power supply.

According to the present invention, in order to solve the above-mentioned problems, while the power supply from the vehicle-mounted power supply to the controller device is always performed, the operation of the electronic device executed by the vehicle-mounted controller device when the operation of the electric device is not necessary is required. By executing the power saving process in which the normal process for the operation is stopped, the power consumption of the controller device is reduced, and when it becomes necessary to operate the electric component, the operation is released and the controller device is reset to the normal mode. It is an object of the present invention to provide an in-vehicle control device that returns to a processing state.

[0013]

In order to achieve the above object, an on-vehicle control device according to the first aspect of the present invention detects a device mounted on a vehicle in order to operate an electric component mounted on the vehicle. A control signal is output to a drive circuit of the electrical component based on various vehicle states to be performed, and the controller device includes a controller device that controls an operation of the electrical component. When a state and a stopped state of the vehicle are detected, a power saving operation for stopping a normal process for outputting a control signal to a drive circuit of the electrical component based on the various vehicle states to save own power consumption. A transition means for executing the processing, and after the power saving processing operation is performed by the operation of the transition means, the ON state of the ignition switch or the brake operation state is detected. Is the time was, in which and a return means for resuming normal processing for outputting a control signal to the electrical components of the drive circuit based on the various vehicle condition.

Further, the on-vehicle control device according to a second aspect of the present invention provides the on-vehicle control device, wherein the transition means is configured to switch the vehicle stop state from various vehicle states even when the ignition switch is turned off and the vehicle is stopped. It is determined whether or not the vehicle is safely stopped, and when the vehicle is safely stopped, a normal process for outputting a control signal to the drive circuit of the electrical component is stopped based on the various vehicle conditions, and the vehicle stops. While executing the power saving process to save power consumption, when the vehicle is not in a safe stop state, the normal process for outputting a control signal to the drive circuit of the electrical component based on the various vehicle states is continued. It was done.

Further, the on-vehicle control device according to a third aspect of the present invention provides the on-vehicle control device, wherein the transition means switches the vehicle stop state from various vehicle states even when the ignition switch is turned off and the vehicle is stopped. It is determined whether or not the vehicle is safely stopped, and when the vehicle is safely stopped, a normal process for outputting a control signal to the drive circuit of the electrical component is stopped based on the various vehicle conditions, and the vehicle stops. The power-saving process for saving power consumption is executed, and the attached alarm is activated when the vehicle is not in a safe stop state.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an in-vehicle control device according to the present embodiment. In FIG. 1, reference numeral 1 denotes a battery as a vehicle-mounted power supply mounted on a vehicle, and reference numerals 2 and 3 denote an ignition switch and a brake switch respectively connected in series to the battery 1. (Brake light switch). The brake switch 3 is grounded via a brake light 6. The brake switch 3 is closed by operating a brake pedal (not shown) so that the brake light 6 is turned on regardless of the operation state of the ignition switch 2. Has become.

Reference numeral 4 denotes an in-vehicle control device, which includes a power supply circuit 10, a controller device 11 including a microcomputer, an electric component driving circuit 12, a vehicle state monitoring circuit 24, and the like.

The power supply circuit 10 is connected to the battery 1 in parallel with the ignition switch 2 and the brake switch 3 without passing through the ignition switch 2 to the battery 1.

A power supply line 31 on the output side of the power supply circuit 10 includes a controller device 11 and an electric component driving circuit 1.
2 and the vehicle state monitoring circuit 24, and the power supply circuit 10 supplies the driving power to the controller device 11, the electrical component drive circuit 12, and the vehicle state monitoring circuit 24 regardless of the ON / OFF state of the ignition switch 2. Supply.

The electric component drive circuit 12 is a circuit for controlling the output of a drive signal supplied to the electric component 13 based on a control signal output from the controller device 11. It is configured to operate by electric power supplied via the power supply.

The vehicle state output device 25 is provided in the vehicle and detects various vehicle states. For example, the vehicle speed, the shift gear position of the transmission, the parking switch state (operating state of the parking brake), and the state of the vehicle. This is a device for outputting detection signals according to these various vehicle states such as the G state and the brake pedal stroke.

The vehicle condition monitoring circuit 24 monitors various vehicle condition signals output from the vehicle condition output device 25 and supplies the signals to the controller device 11. The vehicle state monitoring circuit 24 is also configured to operate by the electric power supplied from the power supply circuit 10 via the power supply line 31 similarly to the electric component drive circuit 12.

The controller 11 to which the electric component drive circuit 12 and the vehicle state monitoring circuit 24 are connected is a microcontroller having a CPU, an A / D conversion function unit, a timer function unit, a communication function unit, a ROM, a RAM, and the like. It is configured by a computer. Controller device 11
In a normal operating state (normal mode), these components are operated, and based on a vehicle state signal detected by the vehicle state output device 25 and supplied via the vehicle state monitoring circuit 24, the electric equipment in the vehicle state is controlled. An operation control process (normal process) for the electrical component 13 such as calculating a suitable operating state of the electrical component 13 and outputting a control signal of the electrical component 13 to the electrical component drive circuit 12 based on the result is performed. ing.

When the controller device 11 determines in the above-described normal mode that the vehicle is safely stopped corresponding to a predetermined specific vehicle state, the operation state of the ignition switch 2 is turned off. For example, among the above-described units such as the CPU, the A / D conversion function unit, the timer function unit, the communication function unit, the ROM, and the RAM, for example, the A / D conversion function unit, the timer function unit,
In addition to stopping the operation of a predetermined function unit such as a communication function unit, the execution of the normal processing is stopped by itself to reduce the power consumption (power saving processing in a low power consumption mode).

The controller device 11 includes:
A terminal P1 which is an input terminal of the ignition switch 2 in an on / off state and which is an interrupt processing terminal for a CPU connected to the ignition switch 2;
And a terminal P2 which is an input terminal for the on / off state of the brake switch 3 and which is an interrupt processing terminal for the CPU connected to the brake switch 3 or the brake light 6.

When the controller device 11 sets this low power consumption mode by itself, as described above, an interruption signal based on the change of the ignition switch 2 from the OFF state to the ON state is transmitted to the terminal P1, or a brake switch is transmitted to the terminal P2. The power-saving device stops the operation of the predetermined functional unit and stops the execution of the normal process related to the control of the electrical component 13 until an interrupt signal based on the change of the state of the electronic component 3 from the off state to the on state is input. Processing is continued.

That is, the controller device 11 outputs an interrupt signal based on the change of the ignition switch 2 to the terminal P1 from the OFF state to the ON state, or changes the brake switch 3 to the terminal P2 from the OFF state to the ON state. When the interrupt signal based on the operation is input, the low power consumption mode set by the user is released, the operation of the stopped functional units is restored, and the controller device 11 controls the operation of the electrical component 13. The normal processing is resumed.

An alarm device 14 has one end connected to the battery 1 and the other end connected to the controller device 11 and is operated by the controller device 11.

Next, the operation of the vehicle-mounted control device 4 configured as described above will be described with reference to the flowchart shown in FIG.

First, when the battery 1 is not yet mounted in the vehicle and the power supply circuit 10 cannot generate a predetermined power supply voltage, the controller device 11 does not supply the driving power via the power supply line 31. It is in.

When the battery 1 is mounted and connected to the vehicle, the power supply circuit 10 generates a predetermined power supply voltage, so that drive power is supplied to the controller device 11 via the power supply line 31 and its operation is started. Be started. In starting the operation by connecting the battery 1 at this time, the controller device 11 performs its own initialization (step S1), the state of the ignition switch 2 (step S2), the state of the brake switch 3 (step S3), And various vehicle states of the vehicle state output device 25 input via the vehicle state monitoring circuit 24 (step S
According to 4), its own operation mode is determined as follows.

First, after the battery 1 is connected to the vehicle,
If neither the ignition switch 2 nor the brake switch 3 has been operated yet and the interruption signal is not supplied to the above-mentioned terminals P1 and P2 by the operation of the ignition switch 2 or the brake switch 3, the vehicle state When the controller device 11 determines that the vehicle is in a safe stop state based on various vehicle status signals input from the output device 25 via the vehicle status monitoring circuit 24, the controller device 11 saves its own power consumption. Therefore, the operation of the A / D conversion function unit, the timer function unit, the communication function unit, and the like described above is stopped, and the operation in the low power consumption mode in which the execution of the normal processing related to the operation control of the electrical component 13 is stopped. The power saving process (step S7) is set and selected by itself.

In the setting selection, the confirmation of the safety stop by the controller device 11 is performed based on various vehicle states detected by the vehicle state output device 25 supplied through the vehicle state monitoring circuit 24. The vehicle speed is zero continuously for the set time, the parking switch is on (the parking brake is operating), or the shift gear position of the transmission is in the parking range,
In addition, the controller 11 determines in the normal mode whether or not the vehicle is in a predetermined vehicle state for a safe stop, such that the G sensor does not detect a slope. (Step S4).

Therefore, when the low power consumption mode is set and selected by the controller device 11 as described above, the controller device 11 causes the A / D conversion function unit,
The operation of the timer function unit, the communication function unit, and the like is stopped, and based on various vehicle state signals detected by the vehicle state output device 25 and supplied via the vehicle state monitoring circuit 24, the electrical components 13 corresponding to the vehicle state are provided. The operation control processing (normal processing) for the electrical component 13 such as calculating the preferred operating state of the electrical component 13 and outputting the control signal of the electrical component 13 to the electrical component drive circuit 12 based on the result is not performed. Even if the low power consumption mode is set, since the power is continuously supplied from the power supply circuit 11 to the CPU and the ROM of the controller device 11, the contents of the initial setting (step S1) are retained. Will be.

On the other hand, when the battery 1 is connected, the ignition switch 2 and the brake switch 3 are both in the off state and no interrupt signal is supplied to the terminals P1 and P2. If the various vehicle state signals input from the vehicle state output device 25 are not the predetermined vehicle state and the safety stop cannot be confirmed, it is determined that the electric component 13 needs to be operated, and the controller device 11 The normal process that allows the operation of the electrical component 13 is performed without shifting to the power consumption mode (steps S5 and S6).

In the normal processing at this time, the controller device 11 activates the alarm device 14 to notify that the vehicle has not been safely stopped (step S5), and detects the vehicle state output device 25 to detect the vehicle state. 24
Based on the vehicle state signal supplied via the ECU, a suitable operation state of the electrical component 13 in the vehicle state is calculated, and a control signal of the electrical component 13 based on the result is transmitted to the electrical component drive circuit 12.
(Step S6).

Accordingly, the on-vehicle control device 4 of the present embodiment
Is, for example, for braking, and the vehicle state output device 2
Based on the operation stroke of the brake pedal supplied from the vehicle 5 through the vehicle state monitoring circuit 24, the brake fluid pressurized and stored in the accumulator of the external hydraulic pressure source is supplied according to the operation stroke of the brake pedal. In-vehicle control of a brake-by-wire type brake system in which the electrical components 13 such as a hydraulic pressure control valve are actuated to control supply to a wheel cylinder and generate a braking force in the wheel cylinder in accordance with an operation stroke of a brake pedal. If it is a device, the above situation is as follows.

When the vehicle is safely stopped when the battery 1 is connected, the electronic components 13 such as a hydraulic pressure control valve are operated and controlled according to the operation stroke of the brake pedal, and the operation stroke of the brake pedal is applied to the wheel cylinder. It is not necessary to perform a braking process (normal process) for generating a braking force according to the controller 11.
In order to save its own power consumption, the operation of the A / D conversion function unit, the timer function unit, the communication function unit, etc. is stopped, and the execution of the braking process is stopped. (Power mode) (step S7).

On the other hand, if the vehicle is not stopped safely when the battery 1 is connected, the alarm device 14 is operated without shifting to the low power consumption mode, and the driver is instructed to stop the vehicle safely. The normal mode for executing the braking process is maintained without stopping the operation of the A / D conversion function unit, the timer function unit, the communication function unit, and the like (Steps S5 and S6).

Next, in the on-vehicle control device 4 of the present embodiment, the off state of the ignition switch 2 and the safe stop state of the vehicle are detected by the operation stop operation of the vehicle after the battery 1 is connected to the vehicle. Then, the controller device 11 operates in the normal mode (steps S2, 6,
When the ignition switch 2 or the brake switch 3 is turned on after the state of the low power consumption mode (step S7) has been entered from steps 3, 4, and 6 and steps S4, 5, 6), the ignition switch 2 or the brake switch 3 is connected. Terminal P of the controller device 11
1 and P2 are supplied with an interrupt signal, and the controller device 11 operates in the low power consumption mode (step S7).
To the normal mode (steps S2, 6, step S3)
Return to 6).

In this return, the CPU and the CPU of the controller device 11 operating in the low power consumption mode are used.
The power supply circuit 10 is stored in the ROM or the like even during the low power consumption mode.
Since the contents of the initial setting (step S1) are held by receiving the power supply from the controller, the controller device 11 can immediately control the operation of the electrical component 13 without performing the initial setting again at the time of the return. it can.

In this regard, the on-vehicle control device 4 of the present embodiment
Is a brake-by-wire type brake system. For example, the case described above, that is, the vehicle is in a state where the ignition switch 2 is off and the vehicle is safely stopped, and the controller device 11 /
The operation of the D conversion function unit, the timer function unit, the communication function unit, and the like is stopped, and the braking process (normal process) for generating a braking force according to the operation stroke of the brake pedal in the wheel cylinder is stopped. Even in the low power consumption mode (step S7), if the driver depresses the brake pedal while the ignition switch 2 is in the off state, the brake switch 3 changes to the on state, and the terminal P2 is turned on. An interrupt signal is supplied to the controller device 11 which has been operating in the low power consumption mode, returns to the normal mode, and performs a braking process for generating a braking force according to the operation stroke of the brake pedal, that is, a normal process (steps S2 and S6). ) Is executed immediately. Accordingly, if the brake pedal is operated even when the ignition switch 2 is in the off state, the hydraulic pressure control valve as the electrical component 13 is operated to generate a braking force in the wheel cylinder according to the operation stroke of the brake pedal. be able to.

Of course, when the ignition switch 2 is turned on, an interruption signal is supplied to the terminal P2 by changing the ignition switch 2 to the on state, and the controller device 11 operating in the low power consumption mode is turned on. The mode returns to the normal mode, and the braking processing for generating the braking force according to the operation stroke of the brake pedal, that is, the normal processing (steps S2, 6, step S3)
6, steps S4, 5, 6) are executed, and the execution is
Next, the operation is continued until the ignition switch 2 is turned off and a safe stop state is confirmed.

Next, in the in-vehicle control device 4 of the present embodiment, while the controller device 11 is operating in the normal mode,
Even when the ignition switch 2 is turned off, the controller device 11 confirms that the brake switch 2 is on, or
If the controller 11 confirms that the vehicle is not in a state where it can be safely stopped based on the vehicle state signal of the vehicle state output device 25 input via the controller 4,
It is determined that the operation of the electrical component 13 is necessary, and the mode is not shifted to the low power consumption mode, and the normal mode (steps S3, 6, and steps S4, 5, 6) in which the electrical component 13 can be operated is maintained.

In connection with this, the on-vehicle control device 4 of this embodiment
Is a brake-by-wire type brake system, for example, when the ignition switch 2 is turned off before the vehicle stops, or when the driver changes the transmission to the parking range. This corresponds to a case where the ignition switch 2 is turned off in order to get off without entering the vehicle and operating the side brake.

In other words, if the driver turns off the ignition switch 2 to save fuel while the vehicle is running before the vehicle completely stops (immediately before stopping), the driver operates the brake pedal at this time. If the operation is being performed, the brake switch 3 is in the ON state even when the ignition switch 2 is in the OFF state. Therefore, the controller device 11 confirms that the brake switch 2 is in the ON state to reduce the power consumption. Without shifting to the power mode, the braking process for generating the braking force according to the operation stroke of the brake pedal, that is, the normal process (steps S3 and S6) is maintained.

On the other hand, in the above case, if the driver does not operate the brake pedal, or if the ignition switch 2 breaks down while the vehicle is operating, the controller device 11 sets the ignition switch 2 to OFF. OFF state and O of brake switch 3
Even if the FF state is confirmed, it is not possible to confirm the safe stop state of the vehicle because the vehicle speed is not zero, etc., so that the driver does not shift to the low power consumption mode, the alarm device 14 is activated to alert the driver, The braking process for generating a braking force corresponding to the operation stroke of the brake pedal, that is, the normal process (steps S4, S5, and S6) is maintained.

Even in such a case, until the brake pedal is operated or until the cause of the failure to confirm the safe stop state, such as the vehicle speed being not zero, is eliminated.
This normal processing (steps S4, S5, S6) is maintained and the alarm device 14 is kept operating, so it is safe. When the brake pedal is operated, the controller device 11 responds to the wheel cylinder according to the operation stroke of the brake pedal. Since the braking force can be generated and the vehicle can be stopped, it is safe (steps S3 and S6).

Even if the driver turns off the ignition switch 2 in order to get off without putting the transmission into the parking range and operating the side brake, the controller device 11 keeps the ignition switch 2 in the OFF state. When the vehicle speed is zero and the vehicle is simply stopped, the vehicle is safely stopped from the shift gear position of the transmission and the parking switch state detected by the vehicle state output device 25 supplied via the vehicle state monitoring circuit 24. Therefore, the normal mode is continued without shifting to the low power consumption mode, the driver is notified of the state by operating the alarm device 14, and the driver is alerted (steps S4, S5).
6).

In this case as well, since the normal mode in which the electrical component 13 can be operated is continued (step S6),
By operating the brake pedal, a braking force corresponding to the operation stroke of the brake pedal can be generated in the wheel cylinder. Further, in this case, the vehicle state output device 25 supplied through the vehicle state monitoring circuit 24 determines whether or not the vehicle is on a hill based on the G state applied to the vehicle. Irrespective of this, the danger avoidance process of operating the hydraulic pressure control valve as the electrical component 13 and automatically generating a braking force on the wheel cylinder is added to the normal mode to ensure safety. This is enabled by continuing the normal mode in which the operation can be performed.

FIG. 3 shows a vehicle-mounted control device 4 according to another embodiment. In the description, the same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted.

In this embodiment, a normally open relay 5 is provided between the power supply device 10 and the electric component drive circuit 12 and the vehicle state monitoring circuit 24, and the normally open relay 5 is It is operated and closed only during the state where normal processing needs to be performed.

In the present embodiment, the ignition switch 2 and the brake switch 3 connected to the controller device 11 are connected via an OR circuit 26 to a terminal P1 which is an interrupt processing terminal of the CPU of the controller device 11. It is.

According to the present embodiment, as shown in FIG. 4, in the low power consumption mode, the controller device 11 stops the operation of the A / D conversion function unit, the timer function unit, the communication function unit, and the like. At the same time, based on a vehicle state signal detected by the vehicle state output device 25 and supplied via the vehicle state monitoring circuit 24, a suitable operation state of the electric component 13 in the vehicle state is calculated, and the electric component 13 is calculated based on the result. In addition to stopping the operation control processing (normal processing) for the electrical component 13 such as outputting the control signal to the electrical component drive circuit 12, when the controller device 11 shifts to the low power consumption mode, the controller device 11 is normally opened. Since the relay 5 can also be opened, and the electrical component drive circuit 12 and the vehicle state monitoring circuit 24 can be brought into a stopped state in which the power supply circuit 10 is disconnected. Power burden of Tteri 1 may further reduce (step S1 ', step S5').

In the embodiment shown in FIG. 3, the electric component drive circuit 1 is opened by opening the normally open relay 5.
2, and the power supply to the vehicle state monitoring circuit 24 is not limited to the transition from the normal mode to the low power consumption mode, as shown in FIG. 4, but when the safety stop of the vehicle cannot be confirmed. In addition, only when the termination of the operation of the electrical components does not pose a danger, the normally open relay 5 is opened before the warning about the safety stop of the vehicle, and the electrical components are driven before the shift from the normal mode to the low power consumption mode. The power supply to the circuit 12 and the vehicle state monitoring circuit 24 may be stopped, and thereafter, when it is confirmed that the vehicle is safely stopped, the mode may be shifted to the low power consumption mode.

In the present embodiment, the ignition switch 2 and the brake switch 3 connected to the controller device 11 are connected via the OR circuit 26. The number of uses can also be reduced.

[0057]

As described above, according to the first aspect of the present invention, while the power supply from the vehicle-mounted power supply to the controller device is always performed, when the operation of the electrical components is not necessary, the vehicle-mounted controller device executes the operation. By stopping the normal process for operating the electrical component and executing the power saving process, the power consumption of the controller device is reduced,
When it becomes necessary to operate the electrical components, the controller device is released and the controller device is returned to the normal processing state, so that when the electrical components need to be activated, the electrical components are immediately brought into various vehicle states. When the operation of the electrical components is no longer necessary, the power consumption of the controller of the vehicle-mounted control device can be reduced, so that the operation responsiveness of the electrical components based on various vehicle conditions can be improved. The load on the vehicle-mounted power supply can be reduced without loss, and the life of the vehicle-mounted power supply can be improved.

According to the second aspect of the present invention, when shifting from the normal processing to the power saving processing, the processing does not shift from the normal processing to the power saving processing unless the vehicle is in a safe stop state. Since the processing is continued, it is possible to prevent a malfunction due to the inability to operate the electrical components due to the shift from the normal processing to the power saving processing, thereby improving safety.

Further, according to the third aspect of the present invention, when shifting from the normal processing to the power saving processing, if the vehicle is not in a safe stop state, an alarm is issued, so that the vehicle is not in a safe stop state. The driver can be aware of this and can encourage the driver to safely stop.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an in-vehicle control device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the vehicle-mounted control device shown in FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a vehicle-mounted control device according to another embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the vehicle-mounted control device shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Battery 2 Ignition switch 3 Brake switch 4 In-vehicle control device 5 Relay 6 Brake light 10 Power supply circuit 11 Controller device 12 Electrical component drive circuit 13 Electrical component 14 Alarm device 24 Vehicle condition monitoring circuit 25 Vehicle condition output device

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[Procedure amendment]

[Submission date] July 14, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an in-vehicle control device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the vehicle-mounted control device shown in FIG. 1;

FIG. 3 is a diagram illustrating a configuration of a vehicle-mounted control device according to another embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the vehicle-mounted control device shown in FIG. 3;

[Description of Signs] 1 Battery 2 Ignition switch 3 Brake switch 4 In-vehicle control device 5 Relay 6 Brake light 10 Power supply circuit 11 Controller device 12 Electrical component drive circuit 13 Electrical component 14 Alarm device 24 Vehicle status monitor circuit 25 Vehicle status output device

Claims (3)

[Claims] 1. A control signal is output to a drive circuit of the electric component based on various vehicle states detected by a device mounted on the vehicle to operate the electric component mounted on the vehicle. An in-vehicle control device including a controller device that controls an operation of an electrical component, wherein the controller device drives the electrical component based on the various vehicle states when an off state of an ignition switch and a stopped state of the vehicle are detected. A transition means for stopping a normal process for outputting a control signal to the circuit to execute a power saving process for saving power consumption of the circuit, and turning on an ignition switch after the power saving process is activated by the operation of the transition device. When a state or a brake operation state is detected, a control signal is sent to a drive circuit of the electrical component based on the various vehicle states. Vehicle control apparatus characterized by and a return means for resuming normal processing for outputting. 2. The method according to claim 1, wherein the transition unit determines whether the stop state is a safe stop state from various vehicle states even when the ignition switch is turned off and the stop state of the vehicle is detected. When the vehicle is in a stopped state,
While stopping a normal process for outputting a control signal to the drive circuit of the electrical component based on the various vehicle states and executing a power saving process of saving own power consumption,
The on-vehicle control device according to claim 1, wherein a normal process for outputting a control signal to a drive circuit of the electrical component is continued based on the various vehicle states when the vehicle is not safely stopped. 3. The stop means determines whether the stop state is a safe stop state from various vehicle states, even when the ignition switch is turned off and the stop state of the vehicle is detected. When the vehicle is in a stopped state,
While stopping a normal process for outputting a control signal to the drive circuit of the electrical component based on the various vehicle states and executing a power saving process of saving own power consumption,
2. The on-vehicle control device according to claim 1, wherein an attached alarm is activated when the vehicle is not safely stopped.