Exhaust gas recirculation system for turbo-charged, fuel direct injection engine

摘要

An exhaust gas recirculation system for a turbo-charged fuel direct injection diesel engine establishes a target air-fuel ratio for an accelerating state of engine operating condition and a target air-fuel ratio for an ordinary engine operating state greater than the target air-fuel ratio for the accelerating state and, when the engine is one of the states, controls the amount of exhaust gas recirculation to deliver the target air-fuel ratio related to the one state.