进气湿度对增压汽油机性能影响的试验  

Experiment on the Effect of Air Humidity on the Performance of Turbocharged Gasoline Engine

作　　者：贾志超[1] 王志[2] 王孟轲[1] 古春山[1] Jia Zhichao;Wang Zhi;Wang Mengke;Gu Chunshan(Chery Automobile Company Limited Powertrain Technology Center,Wuhu 241009,China;State Key Laboratory of Automotive Safety and Energy,Tsinghua University,Beijing 100084,China)

机构地区：[1]奇瑞汽车股份有限公司动力总成技术中心,安徽芜湖241009 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《内燃机学报》2019年第3期222-227,共6页Transactions of Csice

基　　金：国家重点研发计划资助项目(2017YFB0103402)

摘　　要：通过一款涡轮增压汽油机,研究了不同的进气湿度对发动机性能的影响.试验结果表明:随着湿度的增加,一方面实际进入缸内参与燃烧的干空气量下降,另一方面燃烧相位和燃烧持续期恶化,两者共同导致发动机的实测转矩降低而燃油消耗率升高.在大负荷工况时,发动机的抗爆性因湿度增加而得到改善,通过优化发动机的点火提前角,可以改善发动机的燃烧相位,增压发动机在大负荷工况的燃油消耗率反而降低,降低了1.4%~1.8%.Effects of air humidity on engine performance were studied experimentally on a turbocharged gasoline engine. The test results show that,with the increase of humidity,the actual amount of dry air involved in the combustion process is decreased,leading to a retard of combustion phase and an increase of combustion duration.As a result, the engine measured torque decreases and the fuel consumption increases.However,the anti-knock characteristics are remarkably improved with the increase of air humidity under high load operations.Thus,the fuel consumption is decreased by 1.4%-1.8% under high loads by optimizing the ignition advanced angle and the combustion phase.

关 键 词：汽油机 增压 湿度 性能 

分 类 号：TK417[动力工程及工程热物理—动力机械及工程]