Actuator housing

摘要

An EGR valve (10) useful for metering exhaust gas to the intake of an internal combustion engine (22) is disclosed. The EGR valve includes a base member (20) through which exhaust gas passes and in which is disposed a valve member (32). An actuator housing (40) is constructed with integral, hollow leg members (42) for mounting the actuator (16) to the base and also includes a cylindrical extension (46) which sealingly engages an opening (36) in the base to provide a leak-free passage for the valve from the base to the actuator. A solenoid assembly (16) disposed within the housing includes a bottom portion (60) which is configured with openings (68) to support fasteners (72) which pass through the bottom and the hollow housing legs to engage corresponding fastener openings (74) in the base to fix the actuator housing to the base by placing the legs in compression thereagainst. In addition the housing includes integral venting features (104,110) which allow the housing interior to remain in communication with atmospheric pressure when said valve passage is exposed to manifold vacuum thereby preventing contamination of the solenoid actuator with exhaust gas from the exhaust gas passage.