WELDED CONSTRUCTION FOR FUEL VAPOR PURGE REGULATOR VALVE ASSEMBLY

摘要

An electrically controlled fuel vapor canister purge pressure regulator valv e assembly has the regulator valve housing formed integrally with the solenoid operated valve body. A pressure responsive diaphragm is disposed in the housing to form on opposite sides thereof, an inlet chamber and an outlet chamber. The valve body has an inlet passage communicating wit h the inlet chamber and an outlet passage communicating with the outlet passage. The solenoid controls by-pass flow around the diaphragm to the outlet chamber. The outlet passage is closed by a closure member defining an outlet passage and valve seat. The diaphragm has a plate thereon moveable with the diaphragm to control flow over the valve seat. The outlet closure member encloses the diaphragm periphery and is sealed to the housing by a weld ring which may be spin friction or ultrasonically welded to the housing. An inlet chamber closure member forms an inlet fittin g and inlet passage and retains a filter in the inlet chamber. The inlet closure member is sealed to the housing by a weld ring similar to the outlet closure member.