Beginning of Essay
Engines are found all around our very day lives. They are found in our cars, trucks, vans and motorcycles. Almost all vehicles run on the basic combustion engine. An internal- combustion engine is any type of machine that gets mechanical energy from the expenditu ....

Middle of Essay
.... engine that also was used as a boiler. There was a small amount of water placed in the bottom of the cylinder and it was heated until steam was formed. The pressure that was made from the steam made the piston rise fitting in the cylinder, and after it was raised the heat was removed from the bottom of the cylinder. As the cylinder cooled, the steam condensed and the air pressure on the top of the piston pushed the piston down. The main parts of an Otto-cycle engine and a diesel engine are the same. Their combustion chamber has cylinders that are closed at one end and in which a close-fitting piston slides. The outside of the piston is conn ....