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

► Experimental diesel engine fueled on 24% DEE supplement in diesel, at various loads. ► HRR diagrams delayed, pressures, temperatures, heat loss reduced, leaner operation. ► Stochastic techniques showed combustion stability with random cyclic irregularity. ► Moreover, no effect on cyclic irregularity of injection process or DEE/diesel blend.