JP2015093634A - Control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for a vehicle capable of completely stopping a receiving circuit of smart entry control means when the vehicle is not used in a stopped state for a long time, securely suppressing unnecessary wear of a battery, and preventing degradation of the battery.SOLUTION: On condition that removal of a backup fuse 6 for electrically connecting/disconnecting a power supply path 5 from a battery 1 to general loads such as an audio device 2, a navigation device 3 or the like is detected, a control circuit 4d stops the periodic start-up control of a receiving circuit 4a of smart entry control means 4 from the battery 1. Therefore, even in the case where a vehicle is not used for a long time, operation of the receiving circuit 4a of the smart entry control means 4 is completely stopped, enabling an unnecessary dark current of the receiving circuit 4a to be suppressed, thus preventing the degradation of the battery 1, and making it possible to contribute to the prolongation of the life.

Description

  The present invention relates to a vehicle control device including a battery, smart entry control means for controlling locking / unlocking of a door, and a fuse fed by a power supply path to a general load of the battery, and in particular, dark current of the smart entry control means. The present invention relates to a technique for further reducing the above.

  2. Description of the Related Art Generally, a vehicle control device including smart entry control means for controlling locking / unlocking of a door is configured as shown in FIG. 2, for example, and a battery B made of, for example, a lead battery is mounted on a vehicle body. Power is supplied to important loads (not shown) such as a fuel injection control device and an idle stop control device related to the traveling of the vehicle, and power is supplied to the audio device 40, the navigation device 41, etc., which are general loads not related to traveling. In addition, power is supplied to the smart entry control means 50 that controls locking / unlocking of the door.

  At this time, as shown in FIG. 2, a backup fuse 43 is detachably provided in a power supply path 42 from the battery B to the audio device 40 and the navigation device 41, and the power supply path 42 is electrically connected by the removal of the backup fuse 43. For example, in the case where the vehicle is stored in a yard for a long period until the vehicle is shipped and shipped, the backup fuse 43 is removed, and a general load such as the audio device 40 or the navigation device 41 is applied while the vehicle is stopped. The flowing dark current is reduced to suppress the consumption of the battery B.

  By the way, the smart entry control means 50 is configured as shown in FIG. 2, and an RF receiving circuit 52 that receives a radio signal from a key-type transmitter 51 carried by a passenger, and a current receiving circuit 52 that receives a current from the battery B. A power supply circuit 53 supplied to the power supply circuit, a power supply path between the power supply circuit 53 and the reception circuit 52, for example, a PNP switching transistor 54 that intermittently connects the power supply path, and the reception circuit 52 from the transmitter 51. And a control circuit 55 having a microcomputer configuration for outputting a control signal to the body control ECU 60 to control the locking / unlocking of the door when the signal is received.

  Here, the control circuit 55 outputs an ON control signal to the base of the transistor 54 in order to turn on the transistor 54 in the normal operation state, and passes the drive current from the battery B from the power supply circuit 53 to the reception circuit 52. The reception circuit 52 is held in a state in which the wireless signal from the receiver 51 can be received. On the other hand, when the reception circuit 52 does not receive the wireless signal from the transmitter 51 for a time longer than a predetermined time, the reception circuit 52 receives the signal from the battery B. The startup control for starting up the receiving circuit 52 by supplying power to the circuit 52 for a predetermined time is repeated at a predetermined period, and by such startup control, a radio signal from the transmitter 51 that has been interrupted can be received at any time. In addition, the dark current flowing through the smart entry control means 50 during start-up control is suppressed as much as possible, thereby suppressing unnecessary power consumption of the battery B. Rukoto is being carried out.

  As shown in FIG. 2, the body control ECU 60 controls the door lock motor 61 according to the lock control signal and the unlock control signal from the control circuit 55 of the smart entry control means 50, and closes the door switch 62. Open and lock and unlock the door.

  However, as described above, when the vehicle is stored in a yard for a long time until shipping and shipping, the consumption of the battery B cannot be sufficiently suppressed only by reducing the dark current of the general load by removing the backup fuse 43. In order to accelerate the deterioration of the battery B, it has been conventionally considered to further suppress the dark current of the smart entry control means 50.

  Specifically, the longer the duration of non-use of the vehicle is, the longer the period for controlling the activation of the receiving circuit 52, thereby increasing the time during which the receiving circuit 52 does not receive a radio signal from the transmitter 51. It is considered that the longer the activation control period of the receiving circuit 52 becomes, the longer the consumption of the battery B is suppressed (for example, Patent Document 1).

Japanese Patent Laying-Open No. 2005-256407 (see paragraphs 0009, 0035 to 0041 and FIG. 2)

  However, if the vehicle is stored in a yard for a long time until shipping and shipping, or if the user is absent for a long time, the vehicle will not be used while the vehicle is stopped. In spite of the fact that it is not necessary to periodically supply power even if it is a cycle, in the device of the above-mentioned Patent Document 1, if the vehicle is not used for a long time, the start-up control cycle of the receiving circuit 52 becomes longer and the battery becomes longer. Although the consumption of B is suppressed, since the dark current of the smart entry control means 50 continues to flow even when the vehicle is not used, the unnecessary consumption of the battery B cannot be completely suppressed. There is a problem in that it causes deterioration.

  It is an object of the present invention to completely stop the receiving circuit of the smart entry control means when the vehicle is not used for a long period of time and to reliably suppress unnecessary consumption of the battery and prevent deterioration of the battery. Objective.

  In order to achieve the above-described object, the vehicle control device of the present invention receives a battery for supplying power to an important load related to traveling of the vehicle and a general load not related to traveling, and a radio signal from a transmitter carried by a passenger. And a receiving circuit that controls locking / unlocking of the door when the receiving circuit receives the radio signal, and the receiving circuit from the battery when the receiving circuit does not receive the radio signal for a preset time. And a smart entry control means having a control circuit that repeats the start-up control for starting up the receiving circuit by supplying power for a predetermined time in a predetermined cycle, and detachably provided in the power supply path to the general load. In a vehicle control device including an intermittent fuse, the vehicle control device includes a detection unit that detects the removal of the fuse, and the control circuit includes the detection unit. On condition that the removal of the serial fuse is detected, it is characterized by withdrawing said activation control of the receiving circuit from the battery (claim 1).

  The control circuit may restore the start-up control of the receiving circuit on condition that there is an occupant's operation on the vehicle while the start-up control is stopped (Claim 2).

  According to the first aspect of the invention, the smart entry from the battery is performed on the condition that the removal of the fuse is detected by the detecting means for detecting the removal of the fuse that electrically connects and disconnects the power supply path from the battery to the general load. Even if the vehicle is stored in the yard for a long time to stop the cyclic start control of the receiving circuit of the control means, or even if the user is absent for a long time without the user The receiving circuit of the entry control means can be completely stopped, and unnecessary battery consumption can be reliably suppressed to prevent battery deterioration.

  According to the second aspect of the invention, since the control circuit of the smart entry control means restores the start control of the receiving circuit on the condition that there is an occupant's operation on the vehicle while the start control is stopped, the start control If the occupant performs an operation such as opening the door to the vehicle while the vehicle is stopped, the wireless signal from the transmitter carried by the occupant can be immediately returned to the state where the receiving circuit of the smart entry control means can receive it. Even when the vehicle is being stored in the yard or when the vehicle is not used for a long time due to the absence of the user, the receiving circuit of the smart entry control means can receive radio signals when necessary. The vehicle can be used by easily returning to a proper state.

It is a block diagram of one embodiment of a control device for vehicles concerning the present invention. It is a block diagram of a prior art example.

  An embodiment of the present invention will be described in detail with reference to FIG.

  As shown in FIG. 1, a battery 1 made of a lead battery is mounted on the vehicle, and the battery 1 supplies power to an important load (not shown) such as a fuel injection control device and an idle stop control device related to the running of the vehicle. In addition, power is supplied to the audio device 2 and the navigation device 3 that are general loads not related to traveling, and power is supplied to the smart entry control means 4 that controls locking / unlocking of the door.

  A backup fuse 6 is detachably provided in the power supply path 5 from the battery 1 to the audio device 2 and the navigation apparatus 3, and the power supply path 42 is electrically connected and disconnected by the removal of the backup fuse 6. For this reason, for example, when the vehicle is stored in a yard for a long period until the vehicle is shipped and shipped, or when the user is not in use for a long period of time, the backup fuse 6 is removed, and the audio device is stopped while the vehicle is stopped. 2, the dark current flowing through a general load such as the navigation device 3 is reduced, and the consumption of the battery 1 is suppressed.

  As shown in FIG. 1, the smart entry control means 4 is provided with an RF receiving circuit 4a for receiving a radio signal from a key-type transmitter 7 having a built-in transmission circuit carried by an occupant. 1 is supplied, and the power supply path is intermittently controlled by a PNP switching transistor 4c provided in the power supply path between the power supply circuit 4b and the receiving circuit 4a.

  When the receiving circuit 4a receives a radio signal for locking / unlocking from the transmitter 7, a control signal is output from the control circuit 4d having a microcomputer configuration to the body control ECU 8 to control the locking / unlocking of the door. The body control ECU 8 controls the door lock motor 9 according to the lock control signal and the unlock control signal from the control circuit 4d, and the door switch 10 is closed and opened to lock and unlock the door. .

  By the way, when the vehicle is in use, the control circuit 4d outputs an on control signal to the base of the transistor 4c so that the transistor 4c is always turned on, and the driving current from the battery 1 is supplied from the power supply circuit 4b to the receiving circuit 4a. Is received and the receiving circuit 4a is held in a state in which the wireless signal from the transmitter 7 can be received, while the transmitter 7 is in a state longer than a predetermined time when the vehicle is not used and the receiving circuit 4a is set in advance. When the wireless signal is not received from the control circuit 4d, the control circuit 4d repeats the start-up control for starting the receiving circuit 4a by supplying power from the battery 1 to the receiving circuit 4a for a predetermined time T1 in a predetermined cycle T2 (> T1). An ON control signal for T1 time is output to the base of the transistor 4c every period T2, and by such start control, the receiving circuit 4a Held radio signals from signal generator 7 ready to receive at any time. As a result, the dark current flowing through the smart entry control means 4 during startup control is suppressed as much as possible, and unnecessary power consumption of the battery 1 is suppressed.

  Further, an A / D converter 4e for power supply monitoring is provided between the backup fuse 6 and the control circuit 4d, and the audio device via the backup fuse 6 by the control circuit 4d via the A / D converter 4e. 2. A change in the power supply voltage by the battery 1 to a general load such as the navigation device 3 is detected, and whether or not the backup fuse 6 has been removed is detected from this voltage change. Such a detection function of the control circuit 4d corresponds to the detection means in the present invention.

  When the removal of the backup fuse 6 is detected by the control circuit 4d from the change in the feeding potential by the battery 1 to the general load such as the audio device 2 and the navigation device 3, the transistor 4c is maintained in the off state by the control circuit 4d. Thus, the start control for periodically starting the reception circuit 4a is stopped, and the power supply by the battery 1 to the reception circuit 4a via the power supply circuit 4b is completely cut off.

  On the other hand, the reception by the control circuit 4d is performed on the condition that there is a predetermined operation of the occupant with respect to the vehicle, for example, the occupant opens the door to the vehicle while the start control by the control circuit 4d is stopped. The activation control of the circuit 4a is restored, and the activation control for supplying power from the battery 1 to the reception circuit 4a for a predetermined time T1 is repeated again every predetermined period T2 (> T1).

  Therefore, according to the above-described embodiment, the control circuit 4d detects that the backup fuse 6 that electrically connects and disconnects the power supply path 5 from the battery 1 to the general load such as the audio device 2 and the navigation device 3 is detected. As a result, the periodic activation control of the receiving circuit 4a of the smart entry control means 4 is stopped from the battery 1, so that the vehicle is stored in the yard for a long time in a yard for shipping, or there is no user. Even in the case of being in a non-use state for a long time, the operation of the receiving circuit 4a of the smart entry control means 4 can be completely stopped to suppress unnecessary dark current of the receiving circuit 4a. It is possible to prevent the deterioration of the metal and contribute to a longer life.

  In addition, the control circuit 4d of the smart entry control means 4 restores the start control of the receiving circuit 4a on the condition that there is a predetermined operation of the occupant on the vehicle while the start control by the control circuit 4d is stopped. If the occupant performs an operation such as opening the door to the vehicle, the radio signal from the transmitter 7 carried by the occupant can be immediately returned to a state where the receiving circuit 4d of the smart entry control means 4 can receive it. Even when the vehicle is being stored in a yard or when the vehicle is not used for a long time due to the absence of the user, the receiving circuit 4a can receive a radio signal when necessary. The vehicle can be put into a use state by returning to.

  The present invention is not limited to the above-described embodiment, and various modifications other than those described above can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the control circuit 4d detects a change in the feeding potential by the battery 1 to the general load such as the audio device 2 and the navigation device 3 via the backup fuse 6 via the A / D converter 4e. Thus, the case where it is detected whether or not the backup fuse 6 has been removed has been described, but the detection of the removal of the backup fuse 6 is not limited to this.

  Needless to say, the smart entry control means 4 is not limited to the configuration shown in FIG.

1 ... Battery 2 ... Audio device (general load)
3 ... Navigation device (general load)
4 ... Smart entry control means 4a ... Reception circuit 4d ... Control circuit 5 ... Feeding path 6 ... Backup fuse 7 ... Transmitter

Claims (2)

A battery that feeds important loads related to vehicle travel and general loads not related to travel;
A receiver circuit that receives a radio signal from a transmitter carried by a passenger, and the receiver circuit controls the locking / unlocking of the door when the receiver circuit receives the radio signal, and the receiver circuit performs the radio over a preset time. Smart entry control means having a control circuit that repeats a start-up control for starting the receiving circuit by supplying power to the receiving circuit from the battery for a predetermined time when no signal is received;
In a vehicle control device comprising a fuse that is detachably provided on a power supply path to the general load and electrically connects and disconnects the power supply path,
Comprising detection means for detecting removal of the fuse;
The control circuit for a vehicle, wherein the control circuit stops the start-up control of the receiving circuit from the battery on condition that the detection means detects the removal of the fuse.   2. The vehicle control device according to claim 1, wherein the control circuit restores the activation control of the reception circuit on condition that an operation of an occupant is performed on the vehicle while the activation control is stopped.

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