Fault diagnosis method and device for parking solenoid valve and parking control system
A fault diagnosis device and fault diagnosis technology, applied in the direction of measuring device, circuit breaker test, measuring electricity, etc., can solve the problems of parking solenoid valve failure, can not truly reflect the opening and closing state of the parking solenoid valve, to ensure safety The effect of parking
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[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.
[0034] see figure 2 , the fault diagnosis method of parking solenoid valve of the present invention, comprises the following steps:
[0035] When the parking control signal is monitored and after the first time, it is detected whether the rotational speed of the engine is greater than the preset rotational speed threshold, and when the rotational speed is greater than the preset rotational speed threshold, it is determined that the parking solenoid valve 3 is faulty. Wherein, the first time is a continuous period of time.
[0036] The above steps detect whether the rotational speed of the engine is still greater than the preset rotational speed threshold by monitoring the parking control signal and after the first time, and judge whether the engin...
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