FUEL INJECTION QUANTITY CONTROLLING METHOD AND DEVICE

摘要

When a high−pressure fuel from a common rail (2) is divided into a main injection and a pilot injection preceding the main injection to be injected into a combustion chamber in a diesel engine (10), the difference (&Dgr;Qi) between a reference idle injection quantity data (DL) required to keep the diesel engine (10) in an idle drive condition and an idling basic injection quantity data (D1) is obtained as learning value data (D4) by learning at a learning value output unit(74), a target pilot injection quantity data (D2) computed at a target pilot injection quantity computing unit (72) for pilot injecting is corrected at an adder (80) based on the learning value data (D4), and a pilot injection quantity control is performed according to the corrected target pilot injection quantity data (D7) thus obtained.