Studying combustion and cyclic irregularity of diethyl ether as supplement fuel in diesel engine

The effect of injection timing on the performance and emission of direct injection CI engine running on diethyl ether-diesel blends

“…advancement of injection timing provides enough time for mixing injected fuel with compressed air; it increases the cylinder temperature during the expansion stroke and provides more time for soot particles oxidation, which leads to reduced smoke [25]; [26]. Retarded injection timing shows a noticeable increase in smoke opacity.…”

Experimental investigation of n-butanol/diesel fuel blends and n-butanol fumigation – Evaluation of engine performance, exhaust emissions, heat release and flammability analysis

“…The signals of pressure and crank angle were synchronized and recorded by a data acquisition system (NI PCI-6221 type, National Instruments). The average in-cylinder pressure profile over 100 complete cycles was used to calculate the rate of heat release since low cetane number fuels can give rise to cyclic irregularity [22,23]. NO x emission was measured by using a NO x gas analyzer (MEXA-720, Horiba) which employs a zirconia ceramic sensor.…”

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

“…It is essential to make the crank angle corresponding to p max close to TDC for the optimum thermal efficiency of an engine [29]. The power generated in the engine deteriorates in both cases due to either too much advance or too much delay in p max .…”

“…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.…”