AUFBAU EINES ABGASRUECKFUEHRUNGSVENTILS.

摘要

An exhaust gas recirculation valve assembly (10) for controlling the recirculation of exhaust gas in an internal combustion engine has an electrically operated valve member (28) that meters flow of exhaust gas through an exhaust gas chamber (14). The valve member has a valve stem (26) extending to an actuator assembly (30) which is isolated from the base (12) housing the exhaust gas chamber. The valve stem is surrounded by a pair of spring-biased seals (36,38) that seal openings ((24) around the valve stem into the actuator assembly and the exhaust gas chamber. The seal (36) closing the actuator assembly opening has an inverted, cup-shaped configuration which encloses the valve stem between the actuator assembly and the base thereby preventing impingement thereon of contaminants which could be carried into the actuator assembly.