Steuervorrichtung für ein Stellorgan einer Brennkraftmaschine

摘要

A lower limit EIEOF of a current for controlling an EGR valve employed to prevent the EGR valve from generating chattering is set in accordance with an engine revolution speed NE which indirectly indicates an amount of exhaust pressure acting on the EGR valve,as the current valve of the lower limit EIEOF is influenced by the exhaust pressure as a back pressure of the EGR valve (S110). Therefore, it is possible to set a current value eiefin for the EGR control in a range which has not been conventionally covered. The EGR control can be applied to a wider driving region, thus achieving an improved driving state of a diesel engine.