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Compression Ignition

From RitchieWiki

Mechanical Features and Designs

A diesel engine uses a compression ignition system. Compression ignition involves the use of heat gradually produced through the compression of air inside a combustion chamber causing the gas. The heat generated is then used as the means for igniting fuel, essentially causing it to self-ignite.

[edit] How it Works

The act of compression essentially builds up enough heat and pressure inside the combustion chamber. The fuel is primed and sprayed as a mist through an injection nozzle that empties directly into the combustion chamber. The amount of spray is controlled and dispersed directly into the hot compressed air. Upon contact, the sprayed fuel combusts and the motion generated from thia explosion turns the rotating mass inside the engine.[1]

Compression of air inside the combustion chamber is usually a ratio of 21:1. In a gasoline engine, a spark ignition system is used for igniting fuel and the compression of air is a lot of less at a ratio of only 9:1.[2]

[edit] References

  1. Ignition. About.com. 2008-09-29.
  2. Ignition. About.com. 2008-09-29.