Exhaust gas recirculation system for an internal combustion engine

摘要: Disclosed is an exhaust gas recirculation system for engine having a high compression ratio or with supercharger. An outside EGR duct connecting the to intake provided first control valve, which has second bypassing valve. The valve and cooler. When exists in extremely low load state, valves are closed inhibit EGR. In light opened while closed, thereby allowing of gases temperature reducing pumping loss. being opening increasing cooled by cooler performing both improvement anti-knocking performance decrease loss, as well heat within engine.