天然气混氢发动机稀燃极限影响因素试验研究  

Experimental Study on the Factors Affecting Lean Combustion Limit of S.I. Hydrogen-Natural Gas Engine

作　　者：王欣[1,2] 张红光[1] 姚宝峰[1,3] 孙晓娜[1] 雷艳[1] 王道静[1,2] 白小磊[1] 葛蕴珊[2] 

机构地区：[1]北京工业大学环境与能源工程学院,北京100124 [2]北京理工大学机械与车辆学院,北京100081 [3]北京交通大学机械与电子控制工程学院,北京100044

出　　处：《兵工学报》2012年第7期776-781,共6页Acta Armamentarii

基　　金：北京工业大学"星火基金"项目(XH-2010-05-01);北京工业大学基础研究基金项目(001000514311012)

摘　　要：为了研究点火提前角、掺氢比、节气门开度、发动机转速、机油和冷却水温度对天然气混氢发动机稀燃极限的影响,在一台点燃式发动机上开展了台架试验。试验转速1 500～3 000 r/min,节气门开度10%～40%,机油温度75℃～95℃,冷却水温度65℃～85℃.试验用燃料掺氢比0～40%,点火提前角条件为稀燃最佳角。结果表明:过大和过小的点火提前角都使发动机的稀燃极限减小;稀燃极限随燃料中掺氢比增加而显著提高;随节气门开度增加略有上升;随发动机转速增加而减小;随机油温度升高先减小后增大;随冷却水温度升高而略有上升。An experimental study was conducted on a spark ignition engine to investigate the factors that affect the lean combustion limit of hydrogennatural gas engine. The effects of ignition timing, hydrogen mixing ratio, engine speed, throttle opening, lubricant oil and coolant temperature were examined. The engine speed was 1 500 -3 000 r/min, the throttle opening was 10% -40% , the lubricant temperature was 75 ~C - 95 ~C , and the coolant temperature was 65 ~C - 85 ~C during experience. The hydrogen mix- ing ratio varied from 0 to 40% , and the lean-combustion limit ignition timing was defined and adopted. The result shows that both over-retarded and over-advanced ignition timing would baffle the extension of lean-combustion limit. The lean-combustion limit increases with hydrogen mixing ratio, slightly increases with throttle opening, and decreases when the engine speed is raised. Besides, it decreases with the increase in lubricant temperature. Warming-up coolant is positively related to enlarge the lean-combustion limit.

关 键 词：动力机械工程 天然气 氢气 发动机 稀燃极限 

分 类 号：TK437[动力工程及工程热物理—动力机械及工程]