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.
作者
贾志超
王志
王孟轲
古春山
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)
出处
《内燃机学报》
EI
CAS
CSCD
北大核心
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)
关键词
汽油机
增压
湿度
性能
gasoline engine
turbocharged
air humidity
performance
