摘要
米勒循环是当前降低汽油机油耗的关键技术,应用该技术需要对汽油机的型线、压缩比等重新设计,文章通过构建发动机一维热力学模型对米勒循环进行了研究。研究表明:早关米勒循环(EIVC)应用到增压汽油机上降低油耗的效果比晚关米勒循环(LIVC)好,EIVC降低油耗5.6%,LIVC降低油耗3.2%;EIVC进气门型线设计受到低速气门重叠角度限制和中高速增压器压比的限制,所以进气门型线设计应具有窄跨度和高升程的特性;压缩比为11.5和增压器减小12%的方案较合适。
The miller cycle is the key technology to reduce the fuel consumption of gasoline engine at present.To apply the technology to the supercharged gasoline engine,it is necessary to redesign the profile and compression ratio of the gasoline engine.This paper studies the miller cycle by building a one-dimensional thermodynamic model of the engine.The results showed that the early closing miller cycle(EIVC)was better than the late closing miller cycle(LIVC)in reducing fuel consumption.EIVC reduced fuel consumption by 5.6%,and LIVC reduced fuel consumption by 3.2%.The intake valve profile of the EIVC is limited by the overlapping Angle on the low engine speed and the pressure ratio of supercharger on medium-high engine speed,so the intake valve profile should have the characteristics of narrow span and high lift.The compression ratio is 11.5 and the supercharger is reduced by 12%.
作者
梁源飞
周正群
杨如枝
Liang Yuanfei;Zhou Zhengqun;Yang Ruzhi(SAIC-GM-Wuling Automobile Company Limited,Guangxi Liuzhou 545007)
出处
《汽车实用技术》
2020年第13期31-34,共4页
Automobile Applied Technology
关键词
增压汽油机
米勒循环
热力学仿真
型线设计
Turbocharged Gasoline Engine
Miller Cycle
Thermodynamic Simulation
Valve Profile Design
