Combustion & Emission Characteristics of CNG Engine at Idle Conditons

摘要：

The effects of ignition advance angle and excess air ratio on the combustion and emissions characteristics were investigated on a CNG engine at idle conditions. The throttle valve was fully closed. When the parameters were changed, the stepper motor was adjusted automatically to control the engine speed at 800r/min. When the θ is changed from 40 to 10° BTDC, the maximum ITE and the maximum power are observed at X= 1.1. As X increases, the maximum ITE is corresponding to a greater θ. The COV;mep will be increased if the θi is too advanced or too small. When X is more than 1.3, the COVimep increases obviously. When X,=l.l, NOX emissions get the highest level. Nomenclature

关键词： CNG engine idle ignition advance angle excess air ratio

作者: YituanHe NaAn

作者单位: School of Traffic and Transportation, Chongqing Jiaotong University, Chongqing 400074, China

会议类型: 国际会议

会议名称: 2011 3nd International Conference on Mechanical and Electronics Engineering(2011年第三届机械与电子工程国际会议 ICMEE2011)

会议地点: 合肥

会议语种:英文

页码: 786-789

在线出版日期: 2011-09-23（万方平台首次上网日期，不代表论文的发表时间）