The Valve Train in Four‐Stroke Piston Engines

Abstract The power production in an internal combustion engine requires the compression, combustion, and expansion of the engine's working fluid. This sequence of events must be preceded by a mechanism for bringing fresh air and fuel into the combustion chamber. It must be followed by a mechanism for exhausting the spent products from the cylinder. In the two‐stroke engine, the intake and exhaust events occur simultaneously in a scavenging process as the piston approaches the bottom of its operating strokes. In the four‐stroke engine addressed in this chapter the intake and exhaust processes require additional strokes of the piston. In this article. the mechanical development of the four‐stroke valve train is presented.