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Residual Gas Fraction Measurement and Estimation on a Homogeneous Charge Compression Ignition Engine Utilizing the Negative Valve Overlap Strategy

Karagiorgis S. and Collings N. and Glover K. and Petridis T. and Coghlan N.

Society of Automotive Engineers, October 2006

Abstract

This paper is concerned with the Residual Gas Fraction measurement and estimation on a Homogeneous Charge Compression Ignition (HCCI) engine. A novel in-cylinder gas sampling technique was employed to obtain cyclic dynamic measurements of CO2 concentration in the compression stroke and in combination with CO2 concentration measurements in the exhaust stroke, cyclic Residual Gas Fraction was measured. The measurements were compared to estimations from a physical, 4-cylinder, single-zone model of the HCCI cycle and good agreement was found in steady engine running conditions. Some form of oscillating behaviour that HCCI exhibits because of exhaust gas coupling was studied and the model was modified to capture this behaviour.

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BibTex Entry

@InProceedings{,: author = {Karagiorgis S. and Collings N. and Glover K. and Petridis T. and Coghlan N. },; title = {Residual Gas Fraction Measurement and Estimation on a Homogeneous Charge Compression Ignition Engine Utilizing the Negative Valve Overlap Strategy},; booktitle = {Society of Automotive Engineers},; month = {October},; year = {2006}
}



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