| 摘要 |
In an exhaust gas recirculation valve for and internal combustion engine, a valve housing is a short straight length of cylindrical tube (12,62,72), a valve seal (18) comprises a cylindrical bush is an interference fit in the straight housing between the two ends and is fixed in place by crimping, welding or brazing, an actuator (14) is responsive to inlet manifold suction, a valve member (30,32) cooperates with the seat to control the passage of exhaust gases through the valve in response to the actuator. The valve also has a lateral gas outlet aperture (20) in the tube wall on the outlet side of the valve seat and a length of exhaust gas recirculation tubing (24) connected thereto for recirculating gases to the induction side of the engine, and a gas inlet (22) to the housing to the inlet side of the valve seat for receiving engine exhaust gases whose recirculation is to be controlled by the valve. The actuator (14) is mounted over the first end of the housing tube and is connected to the valve member by a rod (32) extending axially down the tube to a valve head (30) which engages a conically tapered axial through passage in the valve seat. |
