机械科学与技术2026，Vol.45Issue(3)：496-502,7.DOI:10.13433/j.cnki.1003-8728.20240039
气道喷水对点燃式发动机燃烧及排放性能的影响
Effect of Port Water Injection on Combustion and Emissions Performance of Spark-ignition Engines
摘要
Abstract
For a direct-injection gasoline engine equipped with a centrally located high-pressure fuel injector,the experimental study was conducted on the effect of the airway water injection on the combustion and emissions performance of spark-ignition gasoline engines.By adjusting the water injection quantity and ignition timing,the study investigated the differences in combustion characteristics and emissions under different water-to-fuel ratios(W/F).The results indicate that under constant ignition timing,the combustion phase delays significantly and the average effective pressure decreases with the increasing of W/F.Advancing the ignition timing can advance the combustion phase,suppress the tendency of knocking combustion,and further increase the engine load.Under different load conditions,the influence of W/F on the combustion process varies.At medium to high loads,an increase in W/F can shift the overall combustion process forward,significantly improving the combustion stability and reducing the fuel consumption.For instance,comparing W/F=0.3 with W/F=0,the fuel consumption can be reduced to be approximately 10%.However,at low loads,the excessively high W/F can deteriorate the combustion stability and increase the fuel consumption.Simultaneously,as W/F increases,the combustion temperature decreases,leading to a decrease in NOx emissions.However,the combustion efficiency decreases,and hydrocarbon emissions worsen.关键词
发动机/气道喷水/燃烧相位/油耗率/NOx排放Key words
engine/airway water injection/combustion phase/fuel consumption/NOx emissions分类
能源科技引用本文复制引用
戴亚,陈泓,赵妞,王利..气道喷水对点燃式发动机燃烧及排放性能的影响[J].机械科学与技术,2026,45(3):496-502,7.基金项目
国家自然科学基金项目(51806143)与安徽省教育厅高校自然科学重点科研项目(2023AH040350,2022AH052431,KJ2021A1210) （51806143）
