The IC engines or “Diesel Engines” as they are referred to, are named after Rudolf Diesel, who invented these engines in 1893. The first working engine was built in 1897. It weighed 5 tonnes and produced 20 hp at 172 rpm with an efficiency of about 26%. (Modern low speed diesel engines can have thermal efficiency that exceeds 50%). In 1912 the first ocean going ship to have installed diesel engines was “Selandia” which was powered by twin, 1010 BHP B&W, 8 cylinder, 4 stroke engines, which were direct coupled. The worlds largest diesel engine is Wartsilla Sulzer RTA96-C common rail marine diesel of about 113,210 hp @ 102 rpm output. Modern Diesel engines operate on Dual Combustion Cycle which is a combination of Constant Volume (Otto) and Constant Pressure (Diesel) cycle is shown in the sketch. The area of the diagram represents the work done on the piston during one cycle. Starting from point C, the air is compressed adiabatically to a point D. Fuel injection begins a