|Title||전지연, 배충식, “수소 압축착화엔진에서 DME 분사의 영향; The Effect of DME injectio in the Hydrogen Compression Ignition Engine”, 제 45회 KOSCO Symposum, 2012. 11.|
전지연, 배충식, “수소 압축착화엔진에서 DME 분사의 영향; The Effect of DME injectio in the Hydrogen Compression Ignition Engine”, 제 45회 KOSCO Symposum, 2012. 11.
The hydrogen co mbustion with dimethyl-ether (DM E) as an ignition promoter was investigated in a single cylinder engine using compression igniti on engine. The hydrogen was injected at intake manifold to make homogeneous charge, and the DME was injected direct ly into the cylinder with common-rail system as an ignit er. The hydrogen and DME inject ion quantity an d DME injection timing were varied corresponding to the fixed total lower heating value. The injection timing of DME was varied from 35 crank angle degrees before the top dead center to the top dead center. indicated mean effective pressure, ignition delay, and emissions were tested under the same load condition. As DME injection timing was advanced, combustion temperature was lowered, and the emissions of carbon monoxide and hydrocarbon were increased by formation of lean premixed charge. When DME was injected near 10 crank angle degrees before top dead center, carbon monoxide and hydrocarbon emissions were minimum and the nitric oxides emission was maximum due to high pressure and heat release rate. If the injection timing of DME was retarded near to the top dead center, indicated mean effective pressure was increased due to partially rich region. DME early inject ion before the 40 crank angle degrees before the top dead cent er made unstable combustion due to excessive lean DME mixture. Misfire was occurred when DME was injected after the top dead center.