What are the different classifications of engines according to the text?
Classification according to the type of cooling
Classification according to the number and arrangement of cylinders
Classification according to the type of fuel used
Classification according to the intake pressure
The classification according to the type of cooling is necessary to maintain acceptable temperature limits for materials, lubrication of parts, and thermal expansions.
The classification according to the number and arrangement of cylinders includes engines in line, V, and horizontal opposites (boxer).
The classification according to the type of fuel used includes engines that consume gaseous or liquid fuel.
The classification according to the intake pressure includes engines with natural or atmospheric aspiration and engines with forced aspiration.