Patent ID: 6269791
Filing Date: 2001-08-07
Classification: F01N,F02D,F02M,Y02T

Abstract:
A control system for an internal combustion engine comprising:an ineffective fuel-supply means for supplying ineffective fuel to the combustion chamber of an internal combustion engine;an EGR means for recirculating the exhaust gas from the engine into the combustion chamber of the engine;an EGR limiting means for limiting the exhaust gas recirculated by said EGR means when the ineffective fuel is being supplied to the engine by said ineffective fuel supply means; whereinsaid EGR means is equipped with an exhaust gas recirculation passage for connecting the exhaust passage of the engine to the intake passage of the engine and an EGR valve for adjusting the flow rate of the exhaust gas flowing through the exhaust gas recirculation passage, and said EGR limiting means limits the recirculation of said exhaust gas by controlling the opening degree of said EGR valve to a value such that the EGR valve is not closed.