| 摘要 |
PROBLEM TO BE SOLVED: To provide an injector drive control device capable of suppressing a large reduction of a boost voltage even when an energy necessary for a valve-opening operation of an injector increases, and capable of maintaining an appropriate boost voltage for passing a valve-opening current.SOLUTION: When a control device controls a boost circuit part 30 to boost a voltage while a valve-opening current is applied from a charge capacitor 33 to a direct injection injector 50, the device increases a charge amount per unit time when charging the charge capacitor 33 with an increase of fuel pressure. Thereby, when a valve opening current is supplied from the charge capacitor 33, a charge amount corresponding to the amount of the valve opening current is supplied to the charge capacitor 33. |
