Patent ID: 9714626
Date: 2017-07-25
CPC Classifications: F02D,F02M

Claim:
1. A drive unit for a fuel injection device which applies a first voltage between both ends of the electromagnetic valve via the turning on of a first switching element, and applies a second voltage between both ends of the electromagnetic valve via the turning on of a second switching element with the second voltage lower than the first voltage, and thus drives an electromagnetic valve such that the electromagnetic valve is opened and closed, wherein when, after the first switching element is turned on, and energization current of the electromagnetic valve increases, the first switching element is turned off, the second switching element is turned on for a predetermined period, the electromagnetic valve is energized with a current lower than an energization current value which is increased by turning on of the first switching element, the second switching element is not turned off during the predetermined period, the electromagnetic valve is detected to have reached a target amount of control lift, and the electromagnetic valve is controlled in such a way that the timing to reach the target amount of control lift is present within the predetermined period.