JP2010070070A - Vehicle controller - Google Patents

Abstract

A vehicle control device capable of making an idling stop execution time as long as possible.
When performing idling stop, the remaining battery level is detected (steps S1 and S2), and if the detected remaining battery level falls below a threshold value V1, the audio power is turned off. (Steps S3 and S5) When the detected remaining battery level further falls below the threshold value V2, the idling stop is canceled and the idling is turned on (steps S6 and S8).
[Selection] Figure 2

Description

  The present invention relates to a vehicle control apparatus that controls a vehicle device, such as an audio device.

Considering the reduction of CO _{2 and the} like emitted from the vehicle, vehicles corresponding to an idling stop system that stops idling during a stop are being used.

JP 2005-263102 A

  In the idling stop system, audio (including radio, TV, etc.) continues to operate even when idling is stopped, and music (including information) continues to be provided to the user.

  However, while idling is stopped, other devices such as an air conditioner continue to operate and continue to consume battery power along with audio. At that time, when the remaining amount of the battery is low, the idling stop itself may not be performed or the idling stop may be completed in a short time in order to prevent the battery voltage from decreasing.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle control device capable of making the idling stop execution time as long as possible.

A vehicle control apparatus according to a first invention for solving the above-described problems is
An internal combustion engine that performs idling stop when temporarily stopped; and
A battery that is charged with electricity by a generator driven by the internal combustion engine;
Audio driven by the supply of electricity charged to the battery;
Control unit for detecting the remaining amount of the battery and controlling the audio and the internal combustion engine according to the remaining amount of the battery;
The control means includes
When the internal combustion engine is performing idling stop, the remaining amount of the battery is detected,
When the detected remaining battery level falls below a predetermined first threshold, the audio power is turned off and idling stop is maintained.

A vehicle control apparatus according to a second invention for solving the above-described problems is
In the vehicle control apparatus according to the first aspect,
The control means includes
When the detected remaining amount of the battery falls below a second threshold value that is defined in advance to be smaller than the first threshold value, the idling stop is canceled, the internal combustion engine is restarted, and the idling state is established. It is characterized by doing.

According to the present invention, power consumption can be suppressed and idling stop can be made as long as possible. As a result, it is possible to contribute to a reduction in the amount of CO ₂ emission from the vehicle.

  Hereinafter, the vehicle control apparatus according to the present invention will be described in detail with reference to FIGS.

  FIG. 1 is a schematic configuration diagram illustrating an example of an embodiment of a vehicle control device according to the present invention, FIG. 2 is a flowchart illustrating a control procedure performed in the vehicle control device, and FIG. It is a graph which shows transition of the battery remaining amount by the said control procedure.

  The vehicle control apparatus according to the present embodiment includes an internal combustion engine that performs idling stop when the vehicle is temporarily stopped. For example, an engine ECU (Electronic Control Unit; ECU) that controls the engine 1 via the engine 1 and the cable 2. Electronic control device) 3 and the like. The vehicle control apparatus according to the present embodiment is driven by a battery 11 that is charged with electricity by a generator (not shown) driven by the engine 1 and a supply of electricity that is charged to the battery 11, and is a CD (compact). -The audio | voice 12 which reproduces music, such as a disk), or operates radio | wireless etc., and ECU13 which controls the audio | voice 12 grade | etc., Is provided.

  The engine ECU 3, the audio 12, and the ECU 13 are connected to a CAN (Controller Area Network) 24 that is an in-vehicle network by cables 21, 22, and 23, and can communicate with each other.

  Electricity is supplied to the audio 12 from the battery 11 via the cable 25. Further, the remaining amount of the battery 11 is detected by the audio 12 and the ECU 13 via the cables 26 and 27, respectively.

  The engine ECU 3 and the ECU 13 are, as hardware, a CPU (microcomputer) that performs calculation, a ROM (read only memory) that is a storage area for a control program, and a RAM (random access memory) that is an operation area for the control program, It is composed of an I / O interface that inputs and outputs various signals, and has a control program that performs predetermined control as software.

  In this embodiment, the ECU 13 performs predetermined control based on the remaining battery level checked in the battery 11 when idling is stopped. Therefore, the control procedure in the present embodiment will be described with reference to FIG.

  First, it is confirmed whether or not idling is stopped (step S1). Specifically, the ECU 13 confirms via the CAN 24 that the engine ECU 3 is performing idling stop.

  The idling stop is to temporarily stop the engine when the idling time becomes long. For example, the shift position is neutral, the vehicle speed is 0 (idle operation state), the cooling water temperature Is carried out when the conditions such as is greater than 80 ° C. and the brake is on for 2-3 seconds or more are satisfied.

  Even when idling is stopped, as described above, the audio 12 and the air conditioner continue to operate. In this state, the remaining battery level is decreasing and the idling stop is immediately released. Or in some cases, the engine cannot be restarted. Therefore, in this embodiment, the ECU 13 checks the remaining battery level of the battery 11 (step S2) and performs the following control according to the voltage of the remaining battery level.

  Specifically, it is confirmed whether or not the checked remaining battery level is below a predetermined threshold value V1 (first threshold value) (step S3).

  If the checked remaining battery level is equal to or greater than a predetermined threshold value V1, idling is maintained OFF, and idling stop is maintained and continued (step S4).

  On the other hand, if the checked remaining battery level is below the predetermined threshold value V1, the idling stop is maintained and continued, but the audio 12 is turned off (step S5). Before the audio 12 is turned off, “LOW BATT” or the like may be displayed on the display of the audio 12 in order to notify the user that the remaining battery level is low. In this case, the display is turned off after “LOW BATT” is displayed for a while. For example, the power supply to the display is stopped after the power supply to the amplifier or the speaker is stopped.

The threshold value V1 is a voltage for determining ON / OFF of the audio when idling is stopped. When the threshold value V1 falls below the threshold value V1 when idling is stopped, that is, idling ON (see step S8) described later is performed. Prior to implementation, the consumption of electricity supplied from the battery 11 is reduced by turning off the audio 12. As a result, as long as possible the time until the idling ON, the longer the time of idling stop itself, it is possible to reduce the emissions of CO ₂ and the like even a little.

  Further, it is confirmed whether or not the checked remaining battery level is below a threshold value V2 (second threshold value; V2 <V1) that is defined in advance to be smaller than the threshold value V1 (step S6).

  If the checked remaining battery level is equal to or greater than a predetermined threshold value V2, idling OFF and audio OFF are maintained. That is, the idling stop is maintained and continued with the audio OFF maintained (step S7).

  On the other hand, when the checked remaining battery level is lower than the predetermined threshold value V2, idling is turned on, that is, idling stop is released, and the engine 1 is restarted to enter the idling state ( Step S8). As a result, the battery 11 is charged by the generator driven by the engine 1 and the remaining battery level is recovered.

  The threshold value V2 is a voltage for determining whether idling is ON / OFF when idling is stopped, and is set to a voltage that is at least larger than a voltage at which the engine 1 can be restarted. As a result, it is possible to prevent the engine 1 from being restarted after idling is stopped.

  FIG. 3 is a graph showing the transition of the remaining battery level according to an example of the control shown in FIG. 2.

  For example, even when idling stop is performed at time t1, the audio 12 and the air conditioner continue to operate, so that the battery voltage V indicating the remaining battery level gradually decreases with time. .

  Therefore, in this embodiment, when the battery voltage V falls below the predetermined threshold value V1 (time t2), the audio is turned off so that the decrease in the battery voltage V is as gentle as possible, and the idling is performed. The stop is made as long as possible.

  In spite of performing such control, when the battery voltage V further decreases and falls below a predetermined threshold value V2 (time t3), the idling is turned on, the engine is restarted, The battery 11 is charged.

  Note that, after the idling is turned on, when the battery voltage V is recovered by charging and exceeds a predetermined threshold value V1 (time t4), the audio may be automatically turned on again.

  In the present embodiment, for the sake of easy understanding, an example in which the ECU 13 for controlling the audio 12 is independently provided has been shown, but the function of the ECU 13 may be performed by another ECU, for example, the engine ECU 3. Good.

  The present invention is suitable for a vehicle having an idling stop function.

It is a schematic block diagram which shows an example of embodiment of the control apparatus of the vehicle which concerns on this invention. 2 is a flowchart illustrating a control procedure performed in the vehicle control device shown in FIG. 1. It is a graph which shows transition of the battery remaining amount by the control procedure shown in FIG.

Explanation of symbols

1 Engine 3 Engine ECU
11 Battery 12 Audio 13 ECU
24 CAN

Claims (2)

An internal combustion engine that performs idling stop when temporarily stopped; and
A battery that is charged with electricity by a generator driven by the internal combustion engine;
Audio driven by the supply of electricity charged to the battery;
Control unit for detecting the remaining amount of the battery and controlling the audio and the internal combustion engine according to the remaining amount of the battery;
The control means includes
When the internal combustion engine is performing idling stop, the remaining amount of the battery is detected,
When the detected remaining amount of the battery falls below a predetermined first threshold value, the audio power is turned off and the idling stop is maintained. The vehicle control device according to claim 1,
The control means includes
When the detected remaining amount of the battery falls below a second threshold value that is defined in advance to be smaller than the first threshold value, the idling stop is canceled, the internal combustion engine is restarted, and the idling state is established. A control apparatus for a vehicle.

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