A Numerical Analysis of the Effect of Mixture Heterogeneity on Combustion in an HCCI Engine

Saijyo, Katsuya; Kojima, Takafumi; Nishiwaki, Kazuie

doi:10.1299/jsmemecjo.2004.3.0_77

Cited by 1 publication

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“…In order to trap sufficient amounts of burned 3. Control of the mixing process [13,14,[19][20][21]. In gases in the cylinder to initiate CAI combustion, general, a homogeneous mixture promotes CAI the original intake and exhaust camshafts were combustion but it can lead to too fast a heat substituted by those with a short duration as shown in Fig.…”

Section: (B)) Residuals Of the Previous Cycle In The Cylinder Bymentioning

confidence: 99%

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Managing controlled auto-ignition combustion by injection on a direct-injection gasoline engine

Zhao

Brouzos

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part D:

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Controlled auto-ignition (CAI) combustion in gasoline engines has great potential for reducing both NO x emissions and fuel consumption, but its application is still hindered by the lack of direct control of combustion phasing and by the limited CAI operation range. In this paper, the effect of injection timing and split injection on CAI combustion is presented in a single-cylinder direct-injection gasoline engine with an air-assisted injector. The CAI combustion was achieved by trapping some of the burned gases within the cylinder by using low-lift short-duration camshafts and early closure of the exhaust valves. During the experiments, the engine speed was varied from 1200 to 2400 r/min and the air-fuel ratio was altered from stoichiometric to the misfire limit. Both single and split injections were investigated at different injection timings and fuel quantities. The experimental results show that injection timing has an important effect on CAI combustion for single and split injections. Early injection produces faster and more stable combustion, less hydrocarbon and CO emissions, but very rapid heat release rates and higher NO x emissions. The CAI operation range could be extended significantly by early injection. Split injection gives even further extension of the CAI range in both stoichiometric and lean mixture operations. These results indicate that optimizing the injection timing and using split injection is an effective way to control and extend CAI operation in a direct-injection gasoline engine.

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Section: (B)) Residuals Of the Previous Cycle In The Cylinder Bymentioning

confidence: 99%

“…Theresomewhat higher than for SI combustion owing fore, injection timing could be used to control CAI to incomplete combustion. combustion via mixture formation [19][20][21][22][23]. 5.…”

Section: Introductionmentioning

confidence: 99%

Managing controlled auto-ignition combustion by injection on a direct-injection gasoline engine

Zhao

Brouzos

et al. 2007

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

A Numerical Analysis of the Effect of Mixture Heterogeneity on Combustion in an HCCI Engine

Cited by 1 publication

References 0 publications

Managing controlled auto-ignition combustion by injection on a direct-injection gasoline engine

Managing controlled auto-ignition combustion by injection on a direct-injection gasoline engine

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