JP2011110993A - Power supply control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply control device for a vehicle which is more user-friendly for a user of the vehicle. <P>SOLUTION: The power supply control device for the vehicle, which is connected with a door lock detection part that detects the condition of the door lock of the vehicle, a door opening/closing detection part that detects the opening/closing condition of the door of the driver's seat, and an audio unit, controls the power source mode of the vehicle. When a door lock part detects the door lock unlocked and the door opening/closing detection part detects the door of the driver's seat opened, the power source mode is changed to a mode capable of power supply to the audio unit and the volume of the audio unit is set to a predetermined small value. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle power supply control device.

  Conventionally, in a vehicle equipped with a so-called smart entry system, when the door is opened, a request signal is transmitted to the portable key (portable device), and when there is a response, the ignition switch can be rotated, There has been a system that enables electric devices to operate (see, for example, Patent Document 1). Thereby, for example, the audio unit is turned on.

  Also, in a vehicle equipped with a so-called keyless entry system, when an unlock signal is received, when the audio unit is turned on and the ignition is turned off, there is a system that shuts off the power to the audio unit after a predetermined time has elapsed. (For example, see Patent Document 2).

JP 2001-115702 A JP-A-10-131666

  However, in the conventional system as described above, when the audio unit is turned on, the sound or the like is output with the volume at the previous use, so the volume at the previous use is relatively large, and since the previous use, When a relatively long time has passed, the sound or the like may be output with a large volume unexpectedly for the vehicle user.

  Therefore, an object of the present invention is to provide a vehicle power supply control device that is more user-friendly for vehicle users.

  A power supply control device for a vehicle according to an aspect of an embodiment of the present invention includes a door lock detection unit that detects a door lock state of a vehicle, a door open / close detection unit that detects an open / close state of a door of a driver's seat, and an audio unit Connected to the vehicle and controls the power mode of the vehicle, wherein the door lock part detects unlocking of the door lock, and the door opening / closing detection part opens the door of the driver's seat. When it is detected, the power mode is changed to a mode in which power can be supplied to the audio unit, and the volume of the audio unit is set to a predetermined small value.

  The volume of the audio unit may be set to a preset value when an input to turn on the power mode is made after the power mode is changed to a mode capable of supplying power to the audio unit. .

  Further, after the power mode is changed to a mode in which power can be supplied to the audio unit, when the door lock is detected by the door lock unit, or the power mode can be supplied to the audio unit. If a predetermined time has elapsed after switching to the mode, the power mode may be switched to a mode in which power is not supplied to the audio unit.

  In addition, when a predetermined time elapses after the power mode is changed to a mode in which power is not supplied to the audio unit and then the power mode is changed to a mode in which power can be supplied to the audio unit, The volume of the audio unit may be set to a predetermined small value.

  It is possible to provide a vehicle power supply control device that is more convenient for the vehicle user.

It is a figure which shows the structure of the vehicle power supply control apparatus of Embodiment 1. FIG. 3 is a flowchart showing processing contents of a power supply control ECU 10 according to the first embodiment. 7 is a flowchart showing processing contents of a power supply control ECU 20 according to a second embodiment.

  Embodiments to which the vehicle power supply control device of the present invention is applied will be described below.

[Embodiment 1]
FIG. 1 is a diagram illustrating a configuration of a vehicle power supply control device according to a first embodiment. The vehicle power supply control device of the first embodiment is realized as a power supply control ECU 10 shown in FIG.

  The power supply control ECU 10 is an ECU (Electronic Control Unit) that controls the power supply mode of the vehicle. For example, the power supply mode is changed to one of OFF (OFF), accessory mode (ACC), and ignition ON (IG-ON). Let

  Here, in the off state (OFF), only the power supply is always on. In the accessory mode (ACC), power is supplied to accessory devices such as an audio unit and a power window. In ignition-on (IG-ON), the fuel pump, the engine control ECU, etc. are turned on, and the check monitor is lit. In the first embodiment, the accessory mode (ACC) is a power mode that can supply power to the audio unit.

  The power supply control ECU 10 is, for example, a computer unit in which a ROM (Read Only Memory), a RAM (Random Access Memory), and the like are connected to each other via a bus with a central processing unit (CPU) as a center. An internal memory, I / O port, timer, etc. are provided. The ROM stores programs and data executed by the CPU.

  A door lock sensor 11, a driver seat door sensor 12, a brake switch 13, an engine button 14, and a power relay circuit 15 are connected to the power control ECU 10.

  The door lock sensor 11 is a door lock detection unit that detects a door lock state (whether the door lock is locked (locked) or unlocked (unlocked)) of the vehicle. The door lock sensor 11 only needs to be a sensor that can detect the door lock state of the vehicle. For example, when the vehicle is equipped with a so-called smart entry system, the door lock sensor 11 represents the door lock state detected by the smart entry system. You may comprise so that a signal may be received.

  The smart entry system refers to a method in which a user who possesses a portable key uses a radio wave to collate an ID code between a portable key (portable device) possessed by the user and an in-vehicle device. The door lock is automatically unlocked (unlocked) when it is approaching the door, and the door lock is automatically locked (locked) when it is detected that the user holding the mobile key has left the vehicle. ) System.

  The driver's seat door sensor 12 is a door opening / closing detection unit that detects the opening / closing state of the door of the driver's seat. For example, a sensor that detects the opening / closing state can be used to prevent the driver's door from being forgotten to be closed.

  The brake switch 13 is a switch that detects that the brake pedal has been depressed, and is used to light a brake lamp of the vehicle. The brake pedal 13 being depressed to turn on the brake switch 13 is a condition for starting the engine with the engine button 14.

  The engine button 14 is a push switch for starting / stopping the engine. The starter operation (STT) can be performed by pressing the engine button 14 in a state where the brake pedal is depressed in the accessory mode (ACC) (the brake switch 13 is turned on). When the engine button 14 is pressed in the accessory mode (ACC) when the brake pedal is not depressed (the brake switch 13 is off), the power mode is changed from the accessory mode (ACC) to the ignition on (IG-ON). Transition to.

  In the case of HV (Hybrid Vehicle) and EV (Electric Vehicle), when a push button such as a power button is pressed in a state where the brake pedal is depressed in the accessory mode (ACC), the traveling system is activated. .

  The power supply relay circuit 15 includes a relay for accessory devices (hereinafter referred to as ACC relay) 15A and an ignition relay (hereinafter referred to as IG relay) 15B, and supplies / cuts off power supplied from the battery 16 It is a circuit to control.

  The audio unit 17 and other accessory devices 18 are connected to the ACC relay 15A of the power supply relay circuit 15, and the traveling system device 19 is connected to the IG relay 15B. Here, examples of the accessory device 18 include a power window and car navigation, and examples of the traveling system device 19 include a fuel pump and an engine control ECU.

  In addition, an audio unit 17 is connected to the power supply control ECU 10 of the first embodiment, and a mute command can be transmitted from the power supply control ECU 10 to the audio unit 17 in a predetermined case. The mute command is a command for setting the volume of the audio unit 17 to mute (silence) which is the minimum value.

  Next, processing contents of the power supply control ECU 10 according to the first embodiment will be described with reference to FIG.

  FIG. 2 is a flowchart showing the processing contents of the power supply control ECU 10 according to the first embodiment. The initial state of the process shown in FIG. 2 is a state where the power mode is off (OFF), all doors are closed, and all door locks are locked. That is, typically, the vehicle is parked and not used, and all door locks are locked (locked).

  The power supply control ECU 10 starts the flow when the door lock is unlocked (unlocked).

  The power supply control ECU 10 first determines whether or not the driver's seat door has been opened (step S1). The process of step S1 is repeatedly executed until it is detected that the driver's seat door is opened.

  If it is determined in step S1 that the driver's door has been opened, the power supply control ECU 10 shifts to the accessory mode (ACC) to turn on the audio with the minimum volume and starts counting the time T1 by the timer (step S1). S2).

  Here, the audio is turned on with the minimum volume because the door lock is unlocked (unlocked) from the initial state and the driver's door is opened. This is because, when the preset value is large, there is a possibility that a sound or the like may be output with a large volume unexpectedly for the user. In such a case, the user may be surprised at a loud sound unexpectedly.

  Next, the power supply control ECU 10 determines whether or not the brake switch 13 is on and the engine button 14 is pressed (step S3). This is to determine whether or not to start the engine.

  When the power control ECU 10 determines in step S3 that the brake switch 13 is on and the engine button 14 is pressed, the ignition control is turned on (IG-ON) to start the engine and the starter is driven. The volume of the audio unit 17 is set to a preset value (step S4). Here, the preset value is the value of the volume set in the audio unit 17 when the power supply mode was turned off (OFF) last time.

  When the process of step S4 is completed, the vehicle is in a state where the engine starts and the power supply control ECU 10 ends the series of processes.

  When the power control ECU 10 determines in step S3 that the brake switch 13 is on and the engine button 14 is not pressed (that is, the engine start command is not input), The flow proceeds to step S5, and it is determined whether or not the engine button 14 has been pressed (step S5). That is, it is determined whether or not only the engine button 14 has been scanned to turn on the ignition (IG-ON) while the brake switch 13 is off (the brake pedal is not depressed).

  If the power control ECU 10 determines in step S5 that the engine button 14 has been pressed, the ignition control is turned on (IG-ON) to set the audio volume to a preset value, and the timer counts the time T2. Start (step S6). As a result, the audio volume is set to the preset value. Since it is considered that the vehicle has been used by the user when the engine button 14 is pressed, the audio volume minimized in step S2 is set to the preset value.

  In this way, since the volume of the audio is set to the preset value only when the engine button 14 is pressed and the ignition is turned on, even if the preset value is large, even if the preset value is large, the sound or the like with an unexpectedly large volume Can be suppressed.

  The state in which the process of step S6 is completed is a state in which the ignition is turned on without starting the engine and the audio is turned on with the preset value volume.

  Next, the power supply control ECU 10 determines whether or not the time counted by the timer has passed the time T2 (step S7). The process of step S7 is repeatedly executed until it is determined that the time T2 has elapsed.

  When determining that the time T2 has elapsed in step S7, the power supply control ECU 10 turns off the accessory mode (ACC) (step S8). This is because, in step S6, the ignition is turned on without starting the engine, and the audio is turned on with the preset value volume, so that power is consumed without charging the battery. This is for stopping without continuing much. Thereby, it can suppress that the charge amount of a battery falls too much.

  When the process of step S8 ends, the power supply control ECU 10 ends the series of processes.

  Further, when it is determined in step S5 that the engine button 14 has not been pressed, the power supply control ECU 10 determines whether or not the time T1 at which the counting was started in step S2 has elapsed (step S9).

  If the power control ECU 10 determines that the time T1 has elapsed in step S9, the power control ECU 10 turns off the power mode (step S10). If the engine button 14 is not pressed even after the predetermined time T1 has elapsed, the ignition may not be turned on for a while, so the ignition is turned off once. This also turns off the audio that was turned on at the minimum volume in step S2.

  If it is determined in step S9 that the time T1 has not elapsed, and if the ignition is turned off in step S10, the power supply control ECU 10 returns the flow to step S5. This is to determine whether or not the engine button 14 is pressed again to turn on the ignition (IG-ON).

  As described above, according to the power supply control ECU 10 of the first embodiment, the vehicle power mode is off (OFF), all doors are closed, and all door locks are locked (typically, Since the audio control is performed only when the door lock is unlocked (unlocked) from the parked state and the driver's door is opened, for example, the front door or the rear seat door or the trunk lid is opened. Audio is not turned on when the baggage is taken in and out. In such a case, it is normally considered that music appreciation or the like by turning on the audio is not necessary, so that it is possible to suppress a decrease in the amount of charge of the battery due to an unnecessary operation.

  In addition, when the driver's door is opened and the audio is turned on, the volume is set to the minimum value, so that it is possible to suppress the output of sound or the like with an unexpectedly large volume for the vehicle user. Usability can be improved. For example, if audio is turned on with a preset value from the beginning, if the preset value is large, the user of the vehicle may be surprised or people around the vehicle may be surprised. According to the power supply control ECU 10 of the first embodiment, such a situation can be suppressed in advance.

  In addition, when the ignition is turned on after turning on the audio with the minimum volume, the audio volume is set to a preset value, so that the user of the vehicle can control the audio with the desired volume without operating the volume. You can enjoy listening to music, etc., and improve the usability of the vehicle.

  In addition, when the ignition is turned on without starting the engine and the audio is turned on at the preset value volume for a predetermined time (T2) or longer, the accessory mode is turned off. It is possible to prevent the state in which power is consumed in a state where charging is not performed from being continued more than necessary, and it is possible to suppress an excessive decrease in the amount of charge of the battery.

  Further, if the engine button 14 is not pressed even when the audio is turned on at the minimum volume for a predetermined time (T1), the ignition is turned off, so that the battery charge amount is prevented from excessively decreasing. be able to.

  In addition, although the form which sets the volume of the audio unit 17 to a mute (silence) was demonstrated above, the volume of the audio unit 17 may not be a mute, and should just be set to the predetermined small value. This is because if the volume is set to a predetermined small value, a user's surprising state can be suppressed in advance.

  In the above description, the power supply control ECU 10 and the audio unit 17 are connected so that only the mute command can be transmitted. However, the power supply control ECU 10 and the audio unit 17 may be connected by a network such as an in-vehicle LAN using CAN (Controller Area Network) -bus communication, for example. In such a case, data communication may be performed between the power supply control ECU 10 and the audio unit 17 in order to set the volume of the audio unit 17 to a predetermined small value.

[Embodiment 2]
The power supply control ECU 20 as the vehicle power supply control device according to the second embodiment stops the engine from the initial state where the engine is started with the ignition on (IG-ON) and all the doors are closed. The power source control ECU 10 of the first embodiment is different from the power source control ECU 10 in that the power source mode is controlled.

  Since the hardware configuration is the same as that of the first embodiment, FIG. 1 is used and description thereof is omitted.

  FIG. 3 is a flowchart showing the processing contents of the power supply control ECU 20 according to the second embodiment. The initial state of the process shown in FIG. 3 is a state in which the engine is started with ignition on (IG-ON) and all doors are closed. That is, typically, the vehicle is traveling.

  The power supply control ECU 20 starts the flow when the engine button 14 is pressed from the initial state.

  First, the power supply control ECU 20 changes the power supply mode from the ignition on (IG-ON) to the accessory mode (ACC) (step S21). As a result, the engine is stopped.

  Next, the power supply control ECU 20 determines whether or not the driver's seat door has been opened (step S22). The process of step S22 is repeatedly executed until it is detected that the driver's seat door is opened.

  If it determines with the driver's seat door having been opened in step S22, power supply control ECU20 will start the count of time T3 by a timer (step S23). This is to count the time from when the driver's seat door is opened until the next use.

  Next, the power supply control ECU 20 determines whether or not the door lock is locked (locked) (step S24). This is because when the door lock is locked (locked), it is considered that the user leaves the vehicle, and in that case, it is considered necessary to turn off the accessory mode (ACC).

  When the door lock is not locked in step S24, the power supply control ECU 20 determines whether or not the time T3 has elapsed (step S25). Since the state where the door lock is not locked (locked) remains in the accessory mode (ACC), the elapse of time T3 is determined to suppress the decrease in the charge amount of the battery 16. .

  Here, when it determines with time T3 not having passed by step S25, power supply control ECU20 returns a flow to step S24.

  If the power supply control ECU 20 determines that the time T3 has elapsed in step S25, the power supply control ECU 20 changes the power supply mode from the accessory mode (ACC) to off (OFF) and starts counting the time T4 by the timer (step S26). . At this time, the value of the volume is held by the audio unit 17 and becomes the next preset value.

  If the door lock is locked (locked) in step S24, the power supply control ECU 20 advances the flow to step S26. When the door lock is locked (locked), the vehicle is not used. Therefore, the power mode is immediately changed from the accessory mode (ACC) to off (OFF) without waiting for the elapse of time T3. It is a thing.

  Next, the power supply control ECU 20 determines whether or not a command for transition to the accessory mode (ACC) has been input (step S27). This is to count the elapsed time until the use of the vehicle whose power mode is changed to OFF in step S26 is started again. This is a process of determining whether or not the mobile key ID of the smart entry system has been collated and changed to the accessory mode (ACC) after being turned off in step S26.

  Next, the power supply control ECU 20 determines whether or not the time counted in step S27 has passed the time T4 (step S28). In order to set the initial value of the audio volume to either the minimum value or the preset value according to the elapsed time until the use of the vehicle whose power mode is changed to OFF in step S26 is restarted, the reference time T4 It is determined whether or not elapses.

  If the power supply control ECU 20 determines that the time T4 has not elapsed in step S28, the power supply control ECU 20 changes the power supply mode to the accessory mode (ACC) without transmitting the mute command to the audio unit 17 (step S29N). As a result, the audio unit 17 outputs sound at a preset value volume.

  On the other hand, when determining that the time T4 has elapsed in step S28, the power supply control ECU 20 transmits a mute command to the audio unit 17 and changes the power supply mode to the accessory mode (ACC) (step S29Y). Thereby, the volume of the audio unit 17 is set to mute.

  When the process of step S29N or S29Y ends, the power supply control ECU 20 ends the series of processes (end).

  As described above, according to the power supply control ECU 20 of the second embodiment, when the time T4 has elapsed after the power supply mode is changed from the accessory mode (ACC) to the off state (OFF), the power supply mode is set to the accessory mode (ACC) next time. ) Is set to mute (minimum value). For this reason, for example, when the vehicle is used on the next day after the time T4 (here, 24 hours) has elapsed, the volume of the audio can be minimized, so that the user who gets into the vehicle has a high volume. It is possible to suppress surprising things.

  On the other hand, when the time T4 has not elapsed since the power supply mode was changed from the accessory mode (ACC) to off (OFF) (for example, when the user returned from the vehicle for a short time for shopping) ), The audio volume is set to a preset value instead of a minimum value. When the use of the vehicle is resumed during a relatively short time, the user may feel uncomfortable when the volume of the audio is minimized. According to the power control ECU 20 of the second embodiment, Such a sense of incongruity can be reduced.

  As mentioned above, although the vehicle power supply control apparatus of exemplary embodiment of this invention was demonstrated, this invention is not limited to embodiment disclosed specifically, and deviates from a claim. Without limitation, various modifications and changes are possible.

10, 20 Power control ECU
11 Door Lock Sensor 12 Driver Door Sensor 13 Brake Switch 14 Engine Button 15 Power Relay Circuit 15A ACC Relay 15B IG Relay 16 Battery 17 Audio Unit 18 Accessory Equipment 19 Traveling System Equipment

Claims (4)

A vehicle power control device that is connected to a door lock detection unit that detects a door lock state of a vehicle, a door open / close detection unit that detects an open / close state of a driver's seat door, and an audio unit, and that controls a power mode of the vehicle. Because
When the door lock is detected to be unlocked and the door opening / closing detector detects that the door of the driver's seat has been opened, the power mode can be supplied to the audio unit. A power supply control device for a vehicle that makes a transition to a mode and sets the volume of the audio unit to a predetermined small value.   The volume of the audio unit is set to a preset value when an input to turn on the power mode is made after transitioning the power mode to a mode capable of supplying power to the audio unit. The vehicle power supply control device described.   After the power mode is changed to a mode in which power can be supplied to the audio unit, when the door lock is detected by the door lock unit, or the power mode is changed to a mode in which power can be supplied to the audio unit. The vehicular power supply control device according to claim 1 or 2, wherein when a predetermined time has elapsed after the transition, the power mode is shifted to a mode in which power is not supplied to the audio unit.   If a predetermined time elapses after the power mode is changed to a mode in which power is not supplied to the audio unit and then the power mode is changed to a mode in which power can be supplied to the audio unit, the audio The vehicle power supply control device according to any one of claims 1 to 3, wherein the unit volume is set to a predetermined small value.

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