Marine Diesel Engine

 The diesel engine is a type of internal combustion engine which ignites the fuel by injecting it into hot,high pressure air in a combustion chamber . The marine diesel engine is a type of diesel engine used on ships

The principle of its operation is as follows:

A charge of fresh air is drawn or pumped into the engine cylinder and then compressed by the moving piston to very high pressure. When the air is compressed ,its temperature rises so that it ignites the fine spray of fuel injected into the cylinder. The burning of the fuel adds more heat to the air charge, causing it to expend and force the engine piston to do work on the carakshaft which in turn drives the ship's propeller.