影响火花点火发动机碳氢排放因素的研究

Investigation of the Factors Influencing Hydrocarbon Emissions in Spark Ignition Engines

综述了西安交通大学内燃机研究所在火花点火发动机未燃碳氢排放方面的研究成果，内容包括未燃碳氢的生成机理、影响因素、预测模型．详细提供了燃烧室狭缝、润滑油膜、燃烧室沉积物、燃油对发动机碳氢排放的影响。建立了冷启动和怠速时发动机缸内未燃碳氢的生成规律以及狭缝与火花点火发动机碳氢排放、动力性和经济性的关系。

This paper summarizes the research achievements in unburned hydrocarbon emissions made by the Institute of Internal Combustion Engine of Xi'an Jiaotion University. It includes formation mechanlsms. influencing factors,prediction models in spark ignition engines and provides the influences of combustion chamber crev1ces, lubricating oil layers' combustion chamber deposits. fuels and oils On englne hydrocarbon ernissions. lt also develops the formation processes of in-cylinder hydrocarbons durlng cold-ustart and idling periods as well as establishes the relationships among engine power, efficiency and hydrocarbon emissions.