ENGINE MOUNTING OF AN EXHAUST GAS RECIRCULATION VALVE

摘要

An internal combustion engine cylinder head (142) has an exterior wall (150) that contains a walled compartment (140). A wall of that compartment is exposed to an internal coolant passage (146) through which liquid coolant circulates. An exhaust gas passageway (160) running through the compartment has an exhaust gas entrance (162) into the compartment and an exhaust gas exit (164) from the compartment. The compartment comprises a receptacle (148) that entersects the exhaust gas passageway between the entrance and the exit. An EGR valve (10) disposed on the exterior wall (150) comprises a base (12) that has an inlet port (30) and an outlet port (32) and that is disposed within the receptacle with the outlet port open to the exit via the passageway. As hot exhaust gas is recirculated, coolant that circulates through the coolant passage aids in limiting peak temperatures to which the valve may be subjected.