Drive Circuit for Electromagnetic Fuel-Injection Valve

A drive circuit for driving an electromagnetic fuel-injection valve, the electromagnetic fuel-injection valve comprising:

• a valve element that closes a fuel path by abutting against a valve seat and opens the fuel path by separating from the valve seat;
• a movable element transmitting a force between the valve element and the movable element to conduct a valve opening and closing operation;
• an electromagnet provided as a drive unit for the movable element, the electromagnet including a coil and a magnetic core;
• and a biasing unit configured to bias the valve element to a reverse direction of a direction of a driving force by the drive unit, the drive circuit comprising:
• a unit capable of applying to the coil a voltage boosted to a voltage higher than a battery voltage;
• and
• a unit configured to, when a drive current is provided to the electromagnetic fuel-injection valve so that the electromagnetic fuel-injection valve conducts fuel injection at least two times in a single stroke of a combustion engine, set an application sequence of a boosted voltage different between the first injection and either one of the second and the subsequent injections so that a power consumption by a boosted voltage applied in the first injection is smaller than a power consumption by a boosted voltage applied in either one of the second and the subsequent injections.