机械科学与技术2024，Vol.43Issue(6)：1000-1005,6.DOI:10.13433/j.cnki.1003-8728.20230005
燃烧室抛光技术对汽油机经济性影响的研究
Effects of Combustion Chamber Polishing Technology on Economic Performance of a Gasoline Engine
摘要
Abstract
An experimental study of the interaction between combustion phase,combustion duration and average indicated thermal efficiency of a single-cylinder gasoline engine before and after combustion chamber wall polishing was carried out.The results show that when the single-cylinder gasoline engine operates at stoichiometric air-fuel ratio,low load and low pressure ratios,the heat transfer loss of the polished combustion chamber wall is reduced and the economic performance is improved,and the average indicated thermal efficiency increases from 40.8%to 42.2%.With the increase of load and compression ratios,the knock effect caused by the reduction of heat transfer loss of the polished combustion chamber wall is enhanced,the combustion phase is delayed and the combustion duration is prolonged,and finally the average indicated thermal efficiency decreases.When the gasoline engine operates in the lean combustion mode,the average indicated thermal efficiency increases greatly,and the maximum thermal efficiency exceeds 45%.When the gasoline engine enters into the knock area and operates at a load of 10.5 bar,the heat transfer loss after wall polishing is reduced and the knock effect is enhanced,resulting in the overall decrease of the average indicated thermal efficiency compared with that before wall polishing.关键词
汽油机/燃烧室/壁面抛光/燃烧相位/燃烧持续期Key words
gasoline engine/combustion chamber/wall polishing/combustion phase/combustion duration分类
能源科技引用本文复制引用
叶彩霞,黄昭明,王利,陈泓,潘金元..燃烧室抛光技术对汽油机经济性影响的研究[J].机械科学与技术,2024,43(6):1000-1005,6.基金项目
安徽省高校自然科学研究重点项目(KJ2019A1195,KJ2020A0837,2022AH052431) （KJ2019A1195,KJ2020A0837,2022AH052431）
