Patent ID: 6807942
Filing Date: 2004-10-26
Classification: F02D,F02M,Y02T

Abstract:
A control system for an internal combustion engine having an exhaust gas recirculation passage for recirculating a portion of exhaust gases from said engine to an intake system and an exhaust gas recirculation control valve for controlling an amount of exhaust gases recirculated through said exhaust gas recirculation passage, said control system comprising:valve opening amount detecting means for detecting a valve opening amount of said exhaust gas recirculation control valve; and fuel supply amount correcting means for correcting a fuel amount to be supplied to said engine according to the valve opening amount of said exhaust gas recirculation control valve; said fuel supply amount correcting means including: average value calculating means for calculating an average valve opening value according the valve opening amount detected by said valve opening amount detecting means, a change rate of the average valve opening value being smaller than that of the valve opening amount detected by said valve opening amount detecting means; and correction value calculating means for calculating a correction value for correcting the fuel supply amount according to the average valve opening value; wherein said fuel supply amount correcting means corrects the fuel supply amount according to the calculated correction value from a time at which an opening of said exhaust gas recirculation control valve is detected by said valve opening amount detecting means.