Patent ID: 6327856
Filing Date: 2001-12-11
Classification: F02B,F02D,F02M,Y02T

Abstract:
A control apparatus for a premixed compression ignition type internal combustion engine, comprising:a fuel injection valve provided in the engine;an operational condition detecting unit arranged to detect at least one operational condition of the engine;a fuel injection control unit for controlling the fuel injection valve on the basis of the detected at least one operational condition, the fuel injection control unit controlling the fuel injection valve so as to initiate fuel injection at an early time instant, before the time at which a piston reaches a compression top dead center, for high load conditions as compared to low load conditions, and so that the supplying of a fuel to a combustion chamber is finished at least before a piston reaches a compression top dead center;an air supply unit capable of supplying pressurized air into the combustion chamber; andan air quantity control unit arranged to control the air supply unit, the air quantity control unit controlling a quantity of air such that combustion by self-ignition is carried out by a compression effect of the piston when the piston is in the vicinity of the compression top dead center and so that excess air ratio is maintained at a lean mixed state in high load operating conditions.