| 摘要 |
PROBLEM TO BE SOLVED: To prevent the fixing of a valve element of a solenoid valve in idling and non-injection. SOLUTION: In this common rail-type fuel injection control device wherein the fuel fed from a feed pump is intensified to high pressure by a high-pressure pump, and the quantity of fuel fed to the high-pressure pump is adjusted by the solenoid valve of which an opening is controlled on the basis of a duty signal, a control frequency of a duty signal is changed to a low frequency side when an operating condition of unifying the opening of the solenoid valve is detected. Whereby the energy or runout width per one wave of the electric current flowing in the electromagnetic solenoid can be increased, and the valve element can be finely vibrated. Whereby the fixing of the valve element can be prevented. |
