30-08-2014, 10:26 AM
HOMOGENEOUS CHARGE COMPRESSION IGNITION (HCCI) ENGINES
HOMOGENEOUS.doc (Size: 13 KB / Downloads: 33)
ABSTRACT
Homogenous Charge Compression Ignition (HCCI) combustion is a new method of burning fuel in internal combustion (IC) engines. In an HCCI engine, the fuel and air are premixed prior to combustion, like in a spark-ignition (SI) engine. However, rather than using a spark to initiate combustion, the mixture is ignited through compression only, as in a compression-ignition (CI) engine. This makes combustion in HCCI engines much more sensitive to fuel chemistry than in traditional IC engines. The union of SI- and CI-technologies gives HCCI engines substantial efficiency and emissions advantages. However, one major challenge preventing significant commercialization of HCCI technology is its small operating range compared to traditional IC engines.