| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the abnormality detection device of a solenoid valve which can judge the abnormality of the solenoid valve accurately by changing the voltage threshold value timely responding thereto, even if a battery or an ignition voltage is changed by the load state of an electric equipment in a vehicle. SOLUTION: In the abnormality detection device of a solenoid valve provided with a solenoid valve drive control means (q) for controlling the drive of a solenoid valve (g), a solenoid valve drive voltage monitor means (b) for monitoring the voltage applied to the solenoid valve (g), a comparison means (c) for comparing the voltage monitored by the solenoid valve drive voltage monitor means (b) with a prescribed voltage threshold value and judge means (d) for judging whether the solenoid valve (g) is operated normaly or not based on the comparison result in the comparison means (c), a voltage threshold value preparing means (e) for judging whether the solenoid valve (g) is operated normaly or not is provided and the voltage threshold value preparing means (e) prepares the voltage threshold value based on the voltage of a battery (f).</p> |
