EXHAUST GAS CIRCULATING CONTROL DEVICE FOR CYLINDER INJECTION TYPE ENGINE

摘要

PROBLEM TO BE SOLVED: To reduce the smoke amount in an exhaust gas, while maintaining the acceleration performance in response to the accelerator operation at the acceleration start time of a vehicle favorably, in an exhaust gas circulating control device A which can control an exhaust gas circulating amount and keep an air-fuel ratio to a prescribed target value in order to reduce both NOx and smoke in the exhaust gas. SOLUTION: An intake throttle valve 14 is controlled in a nearly full close state by an intake throttle valve control means 35d so that EGR valve 24 is controlled in the half open state of the nearly center of full close and full open state by an exhaust gas circulating control means 35b in the idling state of an engine 1. The intake throttle valve 14 is operated to the close side by the intake throttle valve control means 35d in such accelerator return state that a driver detaches an accelerator pedal in response to the speed change operation of a manual transmission during the vehicular acceleration time.