Patent ID: 6694956
Filing Date: 2004-02-24
Classification: F02D,F02M,Y02T

Abstract:
A control system for an internal combustion engine having an exhaust gas recirculation system including an exhaust gas recirculation passage for communicating between an exhaust passage and an intake passage, and an exhaust gas recirculation valve for controlling a rate of exhaust gas recirculation to the intake passage via the exhaust gas recirculation passage, according to an operation amount of the exhaust gas recirculation valve,the control system comprising: fuel supply cut-off means for cutting off supply of fuel to the engine during deceleration of the engine; pressure-detecting means for detecting pressure within the intake passage; and operation amount-limiting means for setting an upper limit of the operation amount of the exhaust gas recirculation valve according to a change in the pressure within the intake passage detected when the exhaust gas recirculation valve is opened and closed during the cut-off of fuel supply.