隔热涂层活塞对汽油机性能的影响

doi:10.13229/j.cnki.jdxbgxb.20240238

摘要/Abstract

摘要：

采用试验研究方法在不同负荷和过量空气系数下研究了隔热活塞对汽油机性能的影响。结果表明：采用隔热涂层活塞，小负荷工况下最佳点火时刻提前，着火延迟期和燃烧持续期延长；相反，大负荷工况下，燃烧中心推迟。此外，采用隔热涂层活塞会导致NO _x 排放量上升，CO和HC排放量下降；在大负荷空气稀释燃烧和当量比燃烧下，隔热涂层活塞对发动机性能影响相同。

关键词: 动力机械及工程, 隔热涂层活塞, 当量比燃烧, 空气稀释燃烧, 发动机性能

Abstract:

An experimental study was conducted to investigate the effects of an insulated piston on gasoline engine performance under different loads and excess air ratios. The results show that the optimal ignition time is advanced at low load， the ignition delay period and the combustion duration are prolonged；conversely， the combustion center is postponed at high load. Additionally the use of thermal insulation coating pistons has led to an increase in NO _x emissions and a decrease in CO and HC emissions； the thermal insulation coating pistons has the same effect on engine performance during both and stoichiometric air dilution combustion at high loads combustion.

Key words: power machinery and engineering, thermal insulation coating piston, stoichiometric combustion, air dilution combustion, engine performance

中图分类号:

TK41

王向阳,刘宇,杜家坤,陈泓,解方喜,芦大佑. 隔热涂层活塞对汽油机性能的影响[J]. 吉林大学学报(工学版), 2025, 55(9): 2828-2836.

Xiang-yang WANG,Yu LIU,Jia-kun DU,Hong CHEN,Fang-xi XIE,Da-you LU. Effect of thermal insulation coating piston on performance of gasoline engine[J]. Journal of Jilin University(Engineering and Technology Edition), 2025, 55(9): 2828-2836.

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参数	数值
缸径/mm	79
活塞行程/mm	102
排量/L	0.5
压缩比	15.8
连杆长度/mm	152

仪器设备	型号	精度
进气模拟增压系统	AVL 515	±50 10⁸ Pa
油水恒温控制单元	AVL 577	±1 ℃
喷油控制单元	Scienlab DICU
瞬态测功机	ACWA-100 5-4-290	扭矩：±0.03% 转速：±1 r/min
缸压传感器	Kistler 6054BR	±0.3%
角标仪	AVL 365C	± 0.5 °CA
燃烧分析仪	AVL INDIMCRO 602
瞬态油耗仪	AVL 7361 CST	±0.05%
气体排放分析仪	HORIBA MEXA-7500D	校准检查：±0.5% 重复试验：±0.5%