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Analysis of Flame Propagation and Low-Temperature Reactions Under a Knocking Condition in a SI Engine Based on Spectroscopic Measurements
Technical Paper
2007-08-0537
Sector:
Event:
JSAE Autumn Conference
Language:
Japanese
Abstract
Knocking in a spark ignition engine is a phenomenon that is influenced in complex ways by flame propagation and autoignition of the unburned end gas. In this study, a spectroscopic method was used to analyze how the degree of flame propagation influences the autoignition characteristics of the unburned end gas. The results revealed that low-temperature oxidation reactions have a governing influence on autoignition to the extent that the flame front has not progressed much under a condition where a cool flame occurs.