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http://dx.doi.org/10.3795/KSME-B.2006.30.5.457

An Experimental Study on the Combustion and Emission Characteristics of the Early Injection in a Gasoline Direct Injection Engine Using Controlled Auto Ignition Combustion Method  

Choi Young-Jong (한양대학교 대학원 기계공학과)
Lee Ki-Hyung (한양대학교 기계공학과)
Lee Chang-Hee (한양대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.30, no.5, 2006 , pp. 457-464 More about this Journal
Abstract
Controlled auto ignition (CAI) combustion, also known as HCCI (homogeneous charge compression ignition), offers the potential to simultaneously improve fuel economy and reduce emission. CAI-combustion was achieved in a single cylinder gasoline DI engine, with a cylinder running in a CAI mode. Standard components were used the camshafts which had been modified in order to restrict the gas exchange process. The effects of air-fuel ratio, residual EGR rate and injection timing such as early injection and late injection on the attainable CAI combustion region were investigated. The effect that injection timings on factor such as start of combustion, combustion duration and heat release rate was also investigated. From results early injection caused the mixture to ignite earlier and burn more quickly due to the exothermic reaction during the recompression and gave rise to good mixing of the fuel-air.
Keywords
CAI(Controlled Auto Ignition); Residual EGR; NVO(Negative Valve Overlap); Early Injection;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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