Method for controlling an exhaust gas recirculation system of a flexible fuel vehicle engine

摘要

An engine for an FFV has an alcohol concentration sensor provided in a fuel system for sensing concentration of alcohol in fuel, and an EGR valve provided between an exhaust port and an intake passage of the engine for controlling an EGR ratio. The EGR ratio is increased with an increase of the alcohol concentration, and increased in an intermediate engine load range other than that of other engine load ranges.