EXHAUST CIRCULATION DEVICE

摘要

PROBLEM TO BE SOLVED: To widen an EGR allowable area without increasing pumping loss in a supercharger engine. SOLUTION: A rotary valve 16 is attached to an upstream side of a connection part of an EGR circuit 30 and an intake pipe 15. An EGR valve 19 is arranged on an inlet of the EGR circuit 30. The valves 16 and 19 are respectively connected to a control device 25 by an electric circuit. The rotary valve 16 and the EGR valve 19 are controlled based on signals from an operation condition sensor 22.