Test Research on the Knock of a Common-Rail Diesel Engine Fueled with Diesel-Methanol Dual-Fuel  

作　　者：Chao Zhu Zhuopei Liu Hao Chen Yangyang Li 

机构地区：[1]State Grid Shaanxi Electric Power Research Institute,Xi’an,710100,China [2]School of Energy and Electrical Engineering,Chang’an University,Xi’an,710064,China [3]Shaanxi Key Laboratory of Development and Application of New Transportation Energy,Chang’an University,Xi’an,710064,China

出　　处：《Energy Engineering》2023年第5期1081-1105,共25页能源工程（英文）

基　　金：funded by the Science Research Project of State Grid Shaanxi Electric Power Company(5226 KY22001J);Yulin Science and Technology Planning Project(CXY-2020-024);Natural Science Basic Research Plan of Shaanxi(2018JQ5115,2020JM-243);the Special Fund for Basic Scientific Research of Central Colleges,Chang’an University(2018JQ5115).

摘　　要：Experiments were conducted on a diesel-methanol dual-fuel(DMDF)engine modified by a six-cylinder,turbocharged,inter-cooled diesel engine.According to the number of diesel injection,the experiments are divided to two parts:the single injectionmode and double injectionmode.The results show that,at the double injectionmode,themaximumof pressure rise rate is small and the engine runs smoothly,however,knock still occurswhen the cocombustion ratio(CCR)is big enough.Under knock status,the power density of the block vibration concentrating at some special frequencies rises dramatically,and the special frequency of single injection mode(about 4.1 kHz)is lower than that of double injection mode(7–9 kHz).The cylinder pressure oscillations of knock status are very different fromthe non-knock status.Under knock status,cylinder pressure oscillations become more concentrated and fiercer at some special frequencies,and the same as the block vibration.The special frequency of single injection mode(3–6 kHz)is lower than that of double injection mode(above 9 kHz).

关 键 词：Common rail diesel engine diesel-methanol dual-fuel KNOCK block vibration pressure oscillation 

分 类 号：O17[理学—数学]