Work System Details about Diesel Marine Aeronautical Engine

Diesel Engine Work System:

The true disel engine, only air is intitially introduced into the combustion chamber , the aie is then compredded with a compression ratio typically between 15: 1 and 22:1 resulting in 40-bar (4.0 MPa;580psi) pressure compared to 8 to 14 bars(0.8 to 1.4MPa) (about 200psi) in the petrol engine. This high compression heats the air to 550 deg.C(1,022 Deg.F). At about the top of the compression stroke, fuel is injection directly into the compressed air in the combustion chamber.

This may be into a void in the top on he piston or pre-chanber depending upon the desiogn of the engine. The fuel injector ensures that the fuel is broken down into small droplets, and thatthe fuel is distributed everly. The heat of the compressed air vaporized fuel from the surface of the droplets. The vapour is then ignited by the heat from the compressed air vaporizes fuel from the surface of the droplets. the vapour is then ignited by the heat from the copressed air in the combustion chamber, the droplets continue to vaporise from their surface and burn, getting smaller, untill all the in the droplets has been butnt.

The start of vaporisation caussed a delay period during ignition and the characteristic diesel knocking sound as the vapour reaches ignition temperature and causes an adrupt increse in pressure above the piston. The rapid expansion of combustion gases then drives the piston downward, supplying power to the crankshaft.Engines for sscale -model aeroplances use a varinat of the Diesel principle but premis fuel ansd air via a carburation system external to the combustion chamber.

Since only air is compressed in a diesel engine, and fuel is not introduction into the cylinder until shortly before top dead centre(TDC), premature detonations in not an issue and compresstion ratios are higher.Marine is a Diesel fuel use and same work and Aeronautical engine is an engine work aeronautical engine .Marine engine is heavy load bear for load and bear many material distribute another place or different country.