Patent ID: 7077114

Claim:
An exhaust gas recirculation system for a combustion engine comprising: (a) an exhaust gas inlet; (b) an exhaust gas outlet; (c) an exhaust gas recirculation valve; (d) an exhaust gas recirculation valve housing; (e) an exhaust gas cooling device including i. a heat exchanger unit constructed to allow flow of coolant therein, ii. a bypass channel connected to bypass the heat exchanger unit, and iii. a bypass flap disposed in the bypass channel; and (f) a housing containing the heat exchanger unit, the bypass flap, and at least a portion of the housing the exhaust gas recirculation valve, wherein at least one valve seat is disposed in the portion of the exhaust gas recirculation valve housing; whereby the valve seat is coolable by the coolant; and wherein the exhaust gas recirculation valve, the exhaust gas cooling device, the heat exchanger unit, and the bypass channel form a unit.