| 摘要 |
The invention provides a self-maintaining electromagnetic valve capable of realizing valve closing regardless of the battery consumption. In a state that the voltage of a power supply is not reduced, coil current is sharply increased due to the exertion of the driving voltage, so that the part favorable for the valve closing of the electromagnetic valve is a part with the coil current passing through the valve closing range immediately after the driving voltage exertion. At the moment, if the driving voltage is shortly exerted in multiple times, the valve closing occasion of the electromagnetic valve can be increased; the valve can be reliably closed. On the other hand, in the state that the voltage of the power supply is reduced, compared with the condition that the voltage of the power supply is not reduced, the condition is that the coil current is reduced along with the driving voltage reduction; in addition, the increase trend of the coil current becomes gentle. Under the condition, if the number of exerting times of the driving voltage is reduced and the exerting time in each time is prolonged, the coil current can be increased, and the electromagnetic valve is remained in the valve closing range for a long time, so that the electromagnetic valve realizes the reliable valve closing. |
