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The Effects of Intake Charge Preheating in a Gasoline-Fueled HCCI Engine
Technical Paper
2005-01-3742
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Experiments were performed on a homogeneously fueled compression ignition gasoline-type engine with a high degree of intake charge preheating. It was observed that fuels that contained lower end and/or non-branched hydrocarbons (gasoline and an 87 octane primary reference fuel (PRF) blend) exhibited sensitivity to thermal conditions in the surge tanks upstream of the intake valves. The window of intake charge temperatures, measured near the intake valve, that provided acceptable combustion was shifted to lower values when the upstream surge tank gas temperatures were elevated. The same behavior, however, was not observed while using isooctane as a fuel. Gas chromatograph mass spectrometer analysis of the intake charge revealed that oxygenated species were present with PRF 87, and the abundance of the oxygenated species appeared to increase with increasing surge tank gas temperatures. No significant oxygenated species were detected when running with isooctane. The presence of the oxygenated species for PRF 87 fueling indicated that reactions were occurring in the intake surge tanks which resulted in needing lower intake charge temperatures to achieve autoignition.
Authors
- Robert J. Iverson - University of Wisconsin-Madison Engine Research Center; Currently affiliated with ArvinMeritor, Inc.
- Randy E. Herold - University of Wisconsin-Madison Engine Research Center
- Rinaldo Augusta - University of Wisconsin-Madison Engine Research Center
- David E. Foster - University of Wisconsin-Madison Engine Research Center
- Jaal B. Ghandhi - University of Wisconsin-Madison Engine Research Center
- James A. Eng - General Motors Research
- Paul M. Najt - General Motors Research
Citation
Iverson, R., Herold, R., Augusta, R., Foster, D. et al., "The Effects of Intake Charge Preheating in a Gasoline-Fueled HCCI Engine," SAE Technical Paper 2005-01-3742, 2005, https://doi.org/10.4271/2005-01-3742.Also In
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