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High Efficiency and Clean Diesel Combustion Concept Using Double Premixed Combustion (Second Report)~Influence of Environmental Variation and Fuel Cetane Quality on New Concept Combustion
Published October 12, 2011 by Society of Automotive Engineers of Japan in Japan
We investigated combustion robustness of new concept combustion, named D-SPIA, regarding intake air temperature, engine coolant temperature and fuel cetane quality. Through this testing we found out that heat release rate of D-SPIA could be maintained at desired phase by control of air-fuel ratio and/or injection timing against change of the environmental conditions. Besides, the combustion of D-SPIA was stable for using of lower cetane fuel.
Finally, we tested a prototype engine installed D-SPIA combustion concept on transient engine test bench and could verify it had a potential to meet Euro6 regulation without any DeNOx after-treatment, showing no fuel penalty.