FUEL INJECTION QUANTITY CONTROLLING METHOD AND DEVICE

A correction value (D4) is calculated based on the difference between reference injection quantity data (DL) required to maintain a diesel engine in idle drive condition and idle basic injection quantity data (D1). A target pilot injection quantity data (D2) is corrected at adder (80) based on correction value. The pilot injection quantity control is performed based on corrected target data. An independent claim is included for fuel injection quantity control device.