Failure check apparatus for control apparatus of vehicle
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United States of America Patent
Stats
-
Dec 11, 2007
Grant Date -
Jul 14, 2005
app pub date -
Dec 16, 2004
filing date -
Dec 16, 2003
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A failure check apparatus for a control apparatus of a vehicle such as ABS. When the failure check apparatus performs initial check for the ABS, it successively activates each of solenoid valves and a motor provided in the ABS, one at a time, for a predetermined time so as to determine whether a failure has occurred in the ABS. At that time, activation of the motor is started when a certain delay time elapses after the end of activation of the last solenoid valve. The delay time is a time which the vibration generated in the control apparatus upon activation of the last solenoid valve converges. Thus, interference between a vibration wave (sound wave) generated upon actuation of the solenoid valves and a vibration wave (sound wave) generated upon actuation of the motor, which differ in nature of vibration, is prevented.
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