Patent ID: 7513245

Claim:
An engine torque control apparatus which is applied to an engine control system comprising an engine for rotating an output shaft by using torque generated through combustion in cylinders, and EGR (exhaust gas recirculation) means for partially recirculating exhaust gas passing through an exhaust passage of the engine into an intake passage of the engine, the apparatus comprising: obtaining means for obtaining torque parameters for increasing/decreasing output torque of the engine; and torque changing means for conducting variable control when an air-fuel ratio indicating a proportion between air and fuel supplied into the cylinders of the engine is changed to a leaner air-fuel ratio, so that the torque parameters is variably controlled in such a way that torque fluctuation associated with a temporarily changing recirculated uncombusted fuel quantity, which is a quantity of uncombusted fuel recirculated by the EGR means, is cancelled in a manner suitable for the temporarily changing recirculated uncombusted fuel quantity, at least during a predetermined period immediately after timing for changing the air-fuel ratio.