Patent ID: 7921707

Claim:
An exhaust gas recirculation distribution variation sensing device for a multi-cylinder internal combustion engine having a plurality of cylinders and a plurality of injectors respectively provided to the cylinders, the internal combustion engine being structured to distribute recirculated exhaust gas, which is recirculated from an exhaust system to an intake system, to the respective cylinders, the exhaust gas recirculation distribution variation sensing device comprising: a torque sensing means for sensing instantaneous torque caused with combustion of fuel injected from the injector or a physical quantity relevant to the instantaneous torque for each cylinder; an injection quantity sensing means for sensing an actual injection quantity of the injected fuel or a physical quantity relevant to the injection quantity for each cylinder; and an exhaust gas recirculation distribution variation calculating means for calculating an exhaust gas recirculation distribution variation based on a variation in the torque sensing value of the torque sensing means among the cylinders and a variation in the injection quantity sensing value of the injection quantity sensing means among the cylinders, wherein the exhaust gas recirculation distribution is a variation among inflow quantities of the recirculated exhaust gas flowing into the respective cylinders at the time when the recirculated exhaust gas is lead from an intake passage of the engine and flows into the respective cylinders.