How Diesel Engines Work
The diesel internal combustion engine differs from the gasoline powered Otto cycle by using highly compressed, hot air to ignite the fuel rather than using a spark plug.
In the true diesel engine, only air is initially introduced into the combustion chamber. The air is then compressed with a compression ratio typically between 15:1 and 22:1 resulting in 40-bar (4.0 MPa; 580 psi) pressure compared to 8 to 14 bars (0.80 to 1.4 MPa) (about 200 psi) in the petrol engine. At about the top of the compression stroke, fuel is injected directly into the compressed air in the combustion chamber, with spark the diesel get burned & get started to get load & cycle get repeated on each movement of pistons.
Application Of Diesel Engines
Widely used for agricultural construction, Industrial, power generation applications, Marine, Tractors, Automotive Industry, Mining and Drilling, Farm Machinery. Water Distribution Area.
Type of Diesel Engines
Lister Type 6/1, 8/1, 10/1, 12/2, 16/2, 20 H.p.
Petter / Kirloskar Type Av, Jv, Tv, Tv2,
Lombardini – Greaves Gl400/ 450/510, Hatz
Petter Type / Kirloskar Type Av, Jv, Tv, Tv2,
Lombardini –greaves Gl400/ 450/510, 4530 Marine Application, Hatz
Lister Type 6/1, 8/1, 10/, 12/2, 16/2, 20 H.p. Petter Type
5 H.p./7.5 H.p./8 H.p./10 H.p.
12 H.p./16 H.p./20 H.p./25 H.p./30 H.p.
Diesel engines have several advantages over other internal combustion engines
- They burn less fuel than a petrol engine performing the same work, due to the engine's higher temperature of combustion and greater expansion ratio Gasoline engines are typically 25 percent efficient while diesel engines can convert over 30 percent of the fuel energy into mechanical energy.
- They have no high-tension electrical ignition system to attend to, resulting in high reliability and easy adaptation to damp environments. The absence of coils, spark plug wires, etc., also eliminates a source of radio frequency emissions which can interfere with navigation and communication equipment, which is especially important in marine and aircraft applications.
- They can deliver much more of their rated power on a continuous basis than a petrol engine.
- The life of a diesel engine is generally about twice as long as that of a petrol engine due to the increased strength of parts used. Diesel fuel has better lubrication properties than petrol as well.