On-board control system and method for vehicles

Details On-board control system and method for vehicles On-board control system and method for vehicles

B - Operations, Transporting

60

R

B60R 16/02 (2006.01) B60R 99/00 (2009.01) B60R 21/01 (2006.01) E05B 65/12 (2006.01) H02J 7/34 (2006.01) H02J 9/06 (2006.01)

Patent

CA 2387246

In an on-board control system, a body ECU (10) executes various control operations in response to the supply of power voltage from a battery (21). There is connected on the power line of the battery (21) a voltage holding circuit (11) which is formed of a capacitor so that the variation of battery voltage slows. A switch input circuit (15) samples the on/off states of external switches (22) periodically under control of a microcomputer (13). The microcomputer (13) determines a fall of battery voltage, causing the switch input circuit (15) to stop sampling of switch states. Stopping the circuit operation and thus reducing the battery load current slows the voltage fall at the occurrence of collision of vehicle, allowing adequate time to store collision data in a collision memory circuit (18).

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