ACCUMULATOR FUEL INJECTION DEVICE

摘要

PROBLEM TO BE SOLVED: To execute appropriate low pressure injection by stably keeping the appropriate pressure of the fuel in a wide operation range of an engine. SOLUTION: An electronic control unit 8 duty-controls opening and closing of pressure control valve 34 such that actual pressure of low pressure fuel stored in a low pressure accumulator 4 approaches a target value, based on the difference of the actual pressure and the target value. A opening duty ratio of the pressure control valve is lower in the low speed operation range than that in the high speed operation range, for preventing pressure reduction of the low pressure fuel in the low speed operation area.