Effect of Cycle-to-Cycle Variations in Spray Characteristics on Hydrocarbon Emission in DI Diesel Engines. (Visualization of Sac Inner Flow, Needle Valve Motion and Cycle-to-Cycle Variations in Diesel Spray).

Study on cycle-by-cycle variations in a diesel engine with dimethyl ether as port premixing fuel

“…Shoji [15] reported spray direction variations are the main sources for the cycle-to-cycle variations of performance at the low speed and low load. Zhang et al [16] pointed out the cycle-to-cycle variations of in-cylinder flow field could be one source of performance variations in the diesel engines.…”

“…Up to present, a great number of systematic studies have revealed mechanisms and control strategies on the cycle-by-cycle variations of SI [14,[23][24][25], HCCI [20,21,[26][27][28] and DICI [15][16][17][18][19]29] engines. However, relatively little work has been reported on the cycle-by-cycle variations of a dual-fuel PCCI combustion, especially for a DME-diesel dual fuel PCCI combustion.…”