Effects of mixing and chemical parameters on thermal efficiency in a partly premixed combustion diesel engine with near-zero emissions

CATEGORY: DIESEL
International Journal of Engine Research June 2012 vol. 13 no. 3 188-198
Effects of mixing and chemical parameters on thermal efficiency in a partly premixed combustion diesel engine with near-zero emissions
Wanhua Su and Wenbin Yu
whsu@tju.edu.cn
State Key Laboratory of Engines, Tianjin University, China
Wanhua Su, State Key Laboratory of Engines, Tianjin University, Tianjin, 300072, China
Abstract
Describes a hybrid combustion control strategy in a partly premixed combustion diesel engine developed and optimized for high thermal efficiency and near-zero emissions in a wide engine operation range.  
The mixing and chemical control parameters of combustion include fuel injection timing, injection rate pattern (such as multi-pulse injections), boost pressure, exhaust gas recirculation and in-cylinder temperature, regulated by the timing of intake valve closing. The interaction of the control parameters plays a decisive role in the determination of thermal efficiency and exhaust emissions.  Researchers studied these factors using comparison analysis with sweeping control parameters and data statistics.
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