Open Access Open Access  Restricted Access Subscription or Fee Access

CI Engine Modeling Techniques

Sowmya Thyagarajan


The internal combustion engine is a heat engine that converts chemical energy in a fuel into mechanical energy, usually made available on a rotating output shaft. Internal combustion engines can be classified in many ways primarily by the type of ignition system they use, spark ignition (SI) and compression ignition (CI). An SI engine starts the combustion process in each cycle by use of a spark plug. The spark plug gives a high-voltage electrical discharge between two electrodes which ignites the air-fuel mixture in the combustion chamber surrounding the plug. The combustion process in a CI engine starts when the air-fuel mixture self-ignites due to high temperature in the combustion chamber caused by high compression. The turbocharged compression ignition (diesel) engine is nowadays the most preferred prime mover in medium-large applications like automobiles, trucks, locomotives, marine vessels, or airplanes. Moreover, it continuously increases its share in the highly competitive automotive market, owing to its reliability that is combined with excellent fuel efficiency. The major goal of this paper is to provide a comprehensive reference source for the researchers in understanding the CI engine, and describes the different types of engine models available.


internal combustion engine, spark ignition, compression ignition, turbocharger

Full Text:



  • There are currently no refbacks.