Control valve for exhaust gas recycling - has flat slider valve with spring return as well as servo drive

摘要

The return flow duct (3) between the exhaust pipe and the inlet manifold has a widened section with the exit from the widened section as a flat valve sent. A flat slider (8) is held in the closed position by a return spring (13). A servo drive (12) moves the slider into the open position, controlled by a processor. The servo drive is electro-magnetic, pneumatic or hydraulic. A spring tag (16) holds the slider onto the valve seat. The valve components are heat resistant. ADVANTAGE - Simple control valve, valve construction does not require tight tolerances, reduced emission products.