National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [51176014]; Natural Science Foundation of Hunan Province, ChinaNatural Science Foundation of Hunan Province [2020JJ4616]
机构署名：
本校为第一且通讯机构
院系归属：
汽车与机械工程学院
摘要：
In order to study the effect of negative valve overlap on combustion and emission characteristics of a homogeneous charge compression ignition engine fueled with natural gas and hydrogen, the test and the simulation were conducted using an engine cycle model coupling the chemical kinetic reaction mechanism under different valve timing conditions. Results show that the internal EGR formed by using negative valve overlap could heat the inlet mixtures and improve the spontaneous ignition characteristic of the engine. The residual exhaust gas could...
