The results show that dimethyl ether (DME) HCCI engine can work stably and can realize zero nitrogen oxides (NOx) emission and smokeless combustion under the compression ratio of both 10.7 and 14.
The paper presents the research results of a direct injection diesel engine operating on dimethyl ether (DME).The effects of main parameters of combustion system such as plunger diameter,nozzle type,fuel delivery advance angle,protruding distance of nozzle tip to the bottom plane of cylinder head and swirl ratio on performances of DME engine are investigated.By adding a pressure pump in the fuel supply system,the vapor block of DME in the fuel system is eliminated,and the engine runs smoot...
In this paper,the emission characteristics of a direct injection diesel engine fueled with dimethyl ether (DEM) are studied and compared with those of diesel fueled engine. The results show that the engine speed and brake mean effective pressure (BMEP) have great influences on emissions. In comparison with those of the engine fueled with diesel,the NO. emission is decreased significantly,the smoke rate is nearly zero,the CO and the HC emissions are reduced slightly and the HCHO emission is increased. The st...
This paper is concerned with an experimental study of a light duty direct injection diesel engine operating on dimethyl ether (DME). Investigatigated are the effects of plunger diameter, nozzle type, fuel delivery advance angle, vertical distance of nozzle tip into cylinder, injection pressure and swirl ratio on performances and emissions of DME engine. The indicator diagrams and needle valve lifts are recorded. The combustion and emission characteristics are evaluated and compared with those fo...