Control system for vehicle

Patent metadata

Field	Value
Publication number	US-9908490-B2
Application number	US-201514740461-A
Country	US
Kind code	B2
Filing date	Jun 16, 2015
Priority date	Jun 18, 2014
Publication date	Mar 6, 2018
Grant date	Mar 6, 2018

Abstract

A control system for a vehicle includes: a battery; a first control unit configured to receive a power supplied from the battery, and configured to control a first control object which is mounted on the vehicle; and an interrupting unit configured to interrupt a supply of the power to the first control unit from the battery, wherein a first switch part is provided between the battery and the first control unit which receives a resumption request signal when the supply of the power to the first control unit is interrupted by the interrupting unit to permit the power to be supplied to the first control unit from the battery.

First claim

What is claimed is:

1. A control system for a vehicle including:
a battery;
a first control unit configured to receive a power supplied from the battery, and configured to control a first control object which is mounted on the vehicle;
and an interrupting unit configured to interrupt a supply of the power to the first control unit from the battery,
wherein a first switch part is provided between the battery and the first control unit which receives a resumption request signal when the supply of the power to the first control unit is interrupted by the interrupting unit to permit the power to be supplied to the first control unit from the battery.

2. The control system for a vehicle according to claim 1 , wherein: the interrupting unit includes a vehicle state determining unit configured to determine a state of the vehicle; and the interrupting unit outputs an interrupting signal to the first switch part to interrupt the supply of the power to the first control unit from the battery or outputs the resumption request signal to the first switch part to permit the power to be supplied, in accordance with the state of the vehicle.

3. The control system for a vehicle according to claim 2 , wherein the vehicle state determining unit is a microcomputer provided in a constant power supply control unit to which the power is constantly supplied.

4. The control system for a vehicle according to claim 3 , wherein the constant power supply control unit controls a second control object which is different from the first control object.

5. The control system for a vehicle according to claim 4 , wherein the constant power supply control unit includes: a power circuit configured to generates an operating power of the second control object including a prescribed control object; and a local switch provided between the power circuit and the second control object; and the microcomputer outputs a local interrupting signal to the local switch to interrupt the supply of the power to the prescribed control object from the power circuit or outputs a local resumption request signal to the local switch to permit the power to be supplied to the prescribed control object, in accordance with the state of the vehicle.

6. The control system for a vehicle according to claim 1 , wherein: the battery is connected to the first control unit by a first power supply line; and the first switch part is installed in a second power supply line which connects the battery to the first control unit in parallel with the first power supply line.

7. The control system for a vehicle according to claim 6 , wherein: the interrupting unit is a fuse detachable and installed in the first power supply line; the first switch part includes an external switch configured to output the resumption request signal; and under a state that the fuse is detached to interrupt the supply of the power from the battery to the first control unit by the first power supply line, the first switch part is allowed to permit the supply of the power by the second power supply line in accordance with the resumption request signal form the external switch.

8. The control system for a vehicle according to claim 7 , wherein: the external switch is provided at a part where the external switch can be operated outside the vehicle.

9. The control system for a vehicle according to claim 8 , wherein: the external switch is a door lock/unlock button in a keyless entry device.

10. The control system for a vehicle according to claim 7 , wherein the first switch part includes a self-holding circuit controlled by a microcomputer provided in the first control unit; and when the first switch part receives the resumption request signal to permit the power to be supplied, the first switch part continues a power supply permission state by a self-holding function even when the resumption request signal disappears afterward.

11. The control system for a vehicle according to claim 10 , wherein the microcomputer is set so that when a prescribed time elapses after the supply of the power is permitted by the first switch part, the microcomputer finishes the self-holding function to interrupt the supply of the power to the first control unit.

12. The control system for a vehicle according to claim 10 , wherein: the first switch part is a transistor; the external switch grounds a base of the transistor to turn on the transistor in accordance with the resumption request signal; and the self-holding circuit is formed with a control switch which is turned on by the microcomputer to hold the base of the transistor in a grounded state.

13. The control system for a vehicle according to claim 10 , further comprising:
a second control unit configured to control a second control object that is different from the first control object; and a second switch part installed in a power supply line which connects the battery to the second control unit,
wherein: the second switch part is controlled by the microcomputer of the first control unit; and when the supply of the power to the first control unit is interrupted, the second switch part interrupts the supply of the power to the second control unit.

14. The control system for a vehicle according to claim 13 , wherein when the power is supplied to the first control unit, the microcomputer permits or interrupts the supply of the power to the second control unit in accordance with the state of the vehicle.

Assignees

• Calsonic Kansei Corp
• Mazda Motor

Inventors

• Saitou Shinji
• Inori Kiyoshi
• Okitsu Makoto
• Yoshinaga Takuya
• Kawabuchi Ryohei
• Hamada Takashi
• Kawazoe Yuko
• Fujihara Kazuki
• Ichida Hiroki

Classifications

• B60R16/03 Primary

  for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} · CPC title