CONTROLING MEHOD FOR EGR SYSTEM OF ENGINE

摘要

PURPOSE: A method for controlling an EGR system of an engine is provided to rapidly control the flow of EGR gas according to an operation condition. CONSTITUTION: A method for controlling an EGR system of an engine comprises following steps. The target flow of EGR gas is calculated using air-mass flowing into a cylinder, and flowing into the engine. An EFA(Effective Flow Area) of an EGR valve is calculated using the target mass flow of the EGR gas. The opening degree of the EGR valve is calculated using a set curve fitting formula, and the EFA.