Movement of the piston creates a pressure drop across this window. In fact, the relationship between piston movement and valve movement can affect net cylinder filling (volumetric efficiency or VE).

An engine's performance potential is maximized when its valve events occur in exactly the right relationship to piston movement. The engine's crankshaft controls piston movement, and its camshaft ...

How cool is this watch inspired by the legendary BMW boxer engine? The video shows the Timeburner watch’s show-stopping feature: a horizontal piston movement like a boxer engine that moves when you ...