Patent ID: 6698192
Filing Date: 2004-03-02
Classification: F01N,F02B,F02D,F02M,Y02T

Abstract:
A fuel injection control device for a diesel engine, the diesel engine comprising an exhaust passage discharging exhaust gas produced by combustion of a mixture of fuel and air, and a particulate filter trapping particulate matter contained in the exhaust gas, the device comprising:a fuel injector injecting fuel; a sensor detecting a required output of the diesel engine; a sensor detecting an intake air amount of the diesel engine; a sensor detecting an operation condition of the engine; and a programmable controller controlling a fuel injection amount of the fuel injector to a target fuel injection amount, programmed to: calculate a basic fuel injection amount based on the required output; calculate a maximum fuel injection amount in response to the intake air amount; determine based on the operating condition whether or not a deposited amount of the particulate matter on the particulate filter has exceeded a predetermined amount; increase the maximum fuel injection amount when the deposited amount of the particulate matter has exceeded the predetermined amount; and set the smaller of the basic fuel injection amount and the maximum fuel injection amount as the target fuel injection amount.