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Description of Fuel Ignitability Dependence of a Premixed Charge Compression Ignition Engine With Chemical Kinetics
Published May 18, 2005 by Society of Automotive Engineers of Japan in Japan
Event: JSAE Spring Conference
With reducing ignitability, the low temperature oxidation is suppressed as onset timing is retarded and the heat release during the low temperature oxidation decreases. Although the high temperature oxidation is retarded with decreasing temperature level due to the suppression of the low temperature oxidation, the ignitability does not directly affect the high temperature oxidation. While reduction of compression ratio does not directly suppress low temperature oxidation, high temperature oxidation was suppressed with decreasing temperature level. With decreasing oxygen concentration in the intake air the concentrations of radicals after low temperature oxidation decreases and the high temperature oxidation is retarded.