火花点燃式发动机燃用汽油及天然气性能研究  

STUDY OF PERFORMANCE OF A SI ENGINE OPERATING WITH GASOLINE AND NATURAL GAS

作　　者：黄敬党[1] R J CROOKES 

机构地区：[1]福建农业大学机电系 [2]伦敦大学ＱＭＷ学院工程院

出　　处：《农业机械学报》1998年第4期12-16,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：中英友好奖学金项目

摘　　要：在一台ＲｉｃａｒｄｏＥ６可变压缩比火花点燃式单缸试验机上，研究了燃用汽油和天然气时，在不同转速、空燃比、压缩比工况下发动机的动力性、经济性及ＣＯ、ＨＣ、ＮＯｘ等排放指标的变化规律。A single cylinder Ricardo E6 variable compression ratio research engine was used to examine the performance and emissions for operation with gasoline and natural gas. Engine speed, air fuel ratio and compression ratio were varied. Experimental results showed that natural gas had leaner misfire limits than the gasoline. Brake power was found to decrease with natural gas even at a higher compression ratio (13∶1) compared with gasoline operation at 8 5∶1. At speeds below 2 500 r/min, the brake thermal efficiency of natural gas at higher compression ratio was however higher than the baseline gasoline engine. Measured emission data indicated that at almost all operating conditions, natural gas gave less total unburnt hydrocarbon than gasoline. Higher nitrogen oxides emissions were produced with natural gas operation at the higher compression ratio than with gasoline operation.

关 键 词：气体燃烧发动机 天然气 代用燃料 汽油 

分 类 号：U473[机械工程—车辆工程]