This paper presents the results of experimental and numerical investigations on pre-ignition in a series-production turbocharged DISI engine. Previous studies led to the conclusion that pre-ignition can be triggered by auto-ignition of oil droplets generated in the combustion chamber. Analysis of more recent experiments shows that a modification of the engine operation parameters that promotes spray/lubricant interaction also increases pre-ignition frequency, while modifications that enhance the speed of chemical reactions (thereby favoring auto-ignition) have little or no influence. The experimental and numerical findings can be explained if we assume the existence of a substance (originating from lubricant/fuel interaction) that displays extremely short ignition delay times.
Premature Flame Initiation in a Turbocharged DISI Engine - Numerical and Experimental Investigations
Sae Int. J. Engines
SAE 2013 World Congress & Exhibition ; 2013
Sae International Journal of Engines ; 6 , 1 ; 54-66
2013-04-08
13 pages
Conference paper
English
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