The cylinder forms the walls of the combustion chamber, while the piston serves as the floor. The top of the piston moves up and down, sealing the combustion chamber during the various stages of the engine cycle. The cylinder head, located at the top of the cylinder,...
In the fourth stroke, the exhaust valve opens, and the piston moves upward once more to expel the spent gases from the cylinder. This four-stroke cycle allows the engine to continuously generate power while operating with much greater efficiency than earlier designs....