Both pistons and valves move in and out of a space at the top of engine cylinders known as the “combustion chamber”.

or in diesel engines, the compression of the air/fuel mixture ignites itself This reaction causes each piston to push down and continue spinning the crankshaft As the piston comes back up inside the ...

Basically, two opposed pistons are rigidly connected to a perpendicular ... The S415 shown is the middle child in a family of two, four, or eight-cylinder engines configurable as naturally ...