Finger follower for a cam-actuated poppet valve in an engine intake manifold assembly

摘要

An integrated intake manifold assembly including a first poppet valve assembly disposed at the air inlet to the manifold to regulate air flow into the manifold; a second poppet valve assembly disposed on the manifold to regulate exhaust gas flow into the air intake system; and a bidirectional camshaft with cams for operating simultaneously the manifold vacuum regulating the poppet valves. The valve bodies are integrally formed in the wall of the intake manifold. The cams are arranged on the shaft to provide optimum synchronized opening and closing of the related valves. When used on a diesel engine, the manifold assembly may further include a swirl valve plate disposed between the manifold and the engine head and having a plurality of ganged swirl valves actuated by levers, connected to the camshaft internally of the manifold and swirl plate, for coordinated motion with the MVR and EGR valves. The valve poppets of the MVR and EGR valves are actuated by finger followers actuated by the camshaft to eliminate side loading of the valve stems.