| 摘要 |
An electronic control unit of the solenoid valve is provided to block the current flowing by detecting the battery ground short circuit of the solenoid valve. An electronic control unit of the solenoid valve comprises the solenoid driving part for controlling the solenoid valve; the controller transmitting the control signal to the driving part; and the asymmetry charge and the discharge circuit part which allows to flow while being discharged according to the PWM DUTY when the solenoid valve is normality. The asymmetry charge and discharge circuit part blocks that current flows when the solenoid valve is abnormal. The asymmetry charge and discharge circuit part comprises the capacitor connected between the solenoid valve and the GND; a first resistance and a second resistance parallely connected between the solenoid valve and capacitor; and the diode is serially connected with the second resistance. |
