Patent ID: 9115656
Filing Date: 2015-08-25
Classification: F02D,F02P,Y02T

Abstract:
1. A control system for an internal combustion engine having a throttle valve disposed in an intake passage of said engine, comprising: rotational speed detecting means for detecting a rotational speed of said engine; intake pressure detecting means for detecting an intake pressure of said engine; wide-open intake air amount calculating means for calculating a wide-open intake air amount according to the engine rotational speed, the wide-open intake air amount being an intake air amount corresponding to a state where said throttle valve is fully opened; theoretical intake air amount calculating means for calculating a theoretical intake air amount according to the wide-open intake air amount and the intake pressure, the theoretical intake air amount being an intake air amount corresponding to a state where no exhaust gas of said engine is recirculated to a combustion chamber of said engine; intake air amount obtaining means for detecting or estimating an actual intake air amount of said engine; exhaust gas recirculation ratio calculating means for calculating an exhaust gas recirculation ratio using the theoretical intake air amount and the actual intake air amount; output torque calculating means for calculating an output torque of said engine using the actual intake air amount and the exhaust gas recirculation ratio; and control means for controlling said engine using the calculated output torque.