| 摘要 |
PURPOSE:To reduce noise without detecting fuel injection interval, by determining a target rotation according to the operating condition during normal operation of a Diesel engine, then setting the fuel injection quantity to a predetermined level and feedback controlling the rotation based on the injection rate. CONSTITUTION:An electronic controler 10 decides that an engine idling if such condition where an accelerator opening fed from an accelerator sensor 81 is zero and the rotations is lower than a predetermined level has continued longer than a predetermined time, then reads out a control quantity corresponding to the basic fuel injection quantity under idling and controls an electromagnetic actuator 3 to set a fuel injection quantity. then a target rotation is obtained based on detection values of a cooling water temperature sensor 86, an air- conditioning switch, etc., so as to control the duty signal for an injection pressure control solenoid valve 70 through a solenoid value drive circuit 7 based on the difference between a rotation sensor 20.
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