internal combustion engine

internal combustion engine: An engine in which the combustion of fuel takes place within a closed cylinder, the hot gases forcing a piston downwards during the power stoke. Most internal combustion engines operate either on the

Otto cycle:this cycle uses petrol.It consists of four stokes,an induction stroke which draws fuel-air mixture into the cylinders; a compression stroke which which the piston compresses the gas mixture; a power stroke in which the mixture combusts after ignition by a spark; and an exhaust stroke which pushes the gas out of the cylinder.

Diesel cycle:this cycle uses diesel.This cycle differs from the Otto cycle in three ways.first the compression stroke causes twice the compression as happens in the Otto cycle.Second, in the power stroke the fuel ignites spontaneously without the need for a spark to initiate the reaction.And third, in the ideal diesel cycle combustion occurs at constant pressure, in contrast to the ideal Otto cycle.