Patent ID: 7021288

Claim:
An injection control apparatus for an engine, comprising at least one of a valve for recirculating a portion of an exhaust gas back into an air intake passage, a diesel throttle for regulating an intake airflow, and a variable turbocharger for compressing the intake airflow by utilizing energy from the exhaust gas; and a controller for determining whether a predetermined learning condition is established, injecting a command quantity of fuel into a combustion chamber of a particular one of a plurality of cylinders of the engine when the predetermined learning condition is established, correcting the command quantity based on an amount of change of a state of the engine caused by the injecting of the command quantity, and adjusting a degree of opening of at least one of the valve to be smaller than a first predetermined reference, the diesel throttle to be larger than a second predetermined reference, and the variable turbocharger to be larger than a third predetermined reference subsequent to determining whether the predetermined learning condition is established and prior to injecting the command quantity.