机械科学与技术2025，Vol.44Issue(3)：404-411,8.DOI:10.13433/j.cnki.1003-8728.20230195
绝热涂层涂覆活塞耦合预燃室射流点火技术
Thermal Barrier Coating Piston Coupled with Pre-chamber Jet Ignition Technology
摘要
Abstract
Based on a research-oriented single-cylinder gasoline engine,the effects of thermal barrier coating on pistons versus uncoated pistons on engine combustion performance were investigated through experiments,with further analysis conducted using pre-chamber high-speed jet ignition technology.The results show that engines equipped with insulated pistons exhibit shorter combustion duration,advanced CA50,reduced heat transfer losses,lower THC and CO emissions,and decreased unburned losses across all load ranges,although NOx emissions increase,leading to improved thermal efficiency and reduced fuel consumption.When pre-chamber jet ignition technology is further applied,CA50 advances at GIMEP(Gross indicated mean effective pressure,pGIME)=11.5 bar(1 bar=100 kPa)and below,but at pGIME=12 bar and above,CA50 is delayed due to intensified pressure oscillations caused by localized rapid combustion of hot jets.Unburned THC and CO emissions increase,unburned losses rise,and NOx emissions are higher overall. At pGIME=10.5 bar and below,thermal efficiency and fuel consumption improve,while at pGIME=11.5 bar and above,they deteriorate. At pGIME=7.5 bar,the net indicated thermal efficiency of the engine with insulated pistons increases by 4.6％,and the net indicated fuel consumption rate decreases by 4.4％.关键词
绝热涂层涂覆活塞/预燃室/燃烧持续期/热效率/油耗率/平均有效指示压力Key words
thermal barrier coated pistons/pre-chamber/combustion duration/thermal efficiency/fuel consumption rate/GIMEP分类
能源与动力引用本文复制引用
程章,黄昭明,吕冬梅,田瑞娇,王浩,梁媛媛..绝热涂层涂覆活塞耦合预燃室射流点火技术[J].机械科学与技术,2025,44(3):404-411,8.基金项目
安徽省高校优秀青年人才支持计划(gxyqZD2020072)与安徽省高等学校自然科学研究重点项目(KJ2020A0837,KJ2021A1214,2022AH052431) （gxyqZD2020072）
