Combination valve to supply secondary air into exhaust system of IC engines has devices between valve outlet and back pressure valve to deflect exhaust flow from outlet through 90o, to reduce temperature and pressure of exhaust on valves

摘要

The valve has a closure part (15) for a valve aperture (14) between air connection (12) and outlet (19) to the exhaust system. A back pressure valve (20) is positioned behind the closure part. Devices (24,27) between outlet and back pressure valve deflect an exhaust gas flow from the outlet through at least 90degrees. The devices include a baffle plate (24), which is located at right angles to the valve opening (23), and separates an antechamber (35) facing the back pressure valve from a deflection chamber connected to the outlet. The valve housing consists of two parts (11,28), and the lower part (28) has external cooling ribs (29).