| 摘要 |
The invention provides a self-hold electromagnetic valve. The self-hold electromagnetic valve can be closed no matter how high the consumption degree of a battery is. When driving voltage used for closing the electromagnetic valve is applied to an electromagnetic coil, before or after valve closing voltage with the voltage value being kept is applied during the given period, intermediate voltage with the voltage value being smaller than the valve closing voltage is applied to the electromagnetic coil. In this way, even if the valve closing voltage is not set to be small in advance, the electromagnetic valve can be closed by applying the intermediate voltage. In addition, under the condition that the battery is consumed, the electromagnetic valve can be closed through the valve closing voltage. Therefore, no matter how high the consumption degree of the battery is, the electromagnetic valve can be closed reliably all the time. |
