稀燃条件下甲醇汽油发动机燃烧和排放特性的试验研究

第39卷第2期 2018年P月

内燃机工程

Chinese Internal Combustion Engine Engineering

Vol. 39 No. 2

April. 2018

文章编号！1000 — 0925(2018) 02 — 0048 —0&390022

稀燃条件下甲醇汽油发动机燃烧和排放特性的试验研究

黄震！，金兆辉！，姜北平！，任瑞雪2，安东％洪伟1

(1.吉林大学汽车仿真与控制国家重点实验室，长春130022;

2.长春一汽四环发动机制造有限公司，长春130000)

Experimental Study on Combustion and Emission Characteristics of

a Lean Burn Engine Fueled with Methanol/Gasoline

H U A N G Zhen1J N Z h a o h u i1J A N G B e ip in g1，R E N R uixue2，A N D on g2，HONG W si1

(1. State Key Laboratory of Automotive Simulation and Control，Jilin University，Changchun 130022，China;

2. Changchun FAW Sihuan Engine Manufacture Co.，Ltd.，Changchun 130000，China)

Abstract ；The combustion and emission characteristics of a GDI turbocharged engine fueled with

different methanol/gasoline blends respectively were investigated under lean burn conditions. Results show

that under lean b urn conditions，the equivalent fuel consumption tends to decrease first and then increase

with the mixture concentration getting thinner. It will increasewith the rise of methanol/gasolin lower than the original. In the p rocess of the mixture getting thinner，the peak cylinder pressure and

combustion temperature decrease，while thecombustiondurationandcycle-to-cyclevariabilitygradually

increase，Under leanburnconditions，t h e CO emissions t end t o decrease and t h e HC emissions decrease firs t

and the increase，while t h e NO：, emissions increase firs t and t h en decrease，and will decrease with the

increase of the volume fractionofmethanol. Moreover，when theengineoperateswithmethanol/gasoline

blends，t h e emission levels of NO：, and CO are lower t h an w i t h gasoline opera t i o n.

摘要；在一台汽油缸内直喷（GDI)增压发动机上，研究了稀燃条件下燃用不同甲醇汽油

混合燃料的燃烧特性和排放特性。试验结果表明：稀燃条件下，随混合气农度逐渐变稀，当量

燃油消耗率呈现出先降低后升高的趋势，并且随着甲醇比例的增加，当量燃油消耗率增加，但

均低于原机。在混合气逐渐变稀的过程中，燃烧时缸压峰值和燃烧温度总的变化趋势是逐渐

降低，而燃烧持续期和循环变动率逐渐升高。稀燃条件下，C O排放量逐渐降低，碳氢化合物

排放呈先降低后增加的趋势。NO。排放量总的变化趋势是先增大后逐渐降低，随着甲醇体积

分数的增加，NO。的排放量逐渐降低，且3种甲醇、汽油混合燃料的NO。*C O排放量都低于

油燃 。

关键词；GDI发动机；甲醇汽油；稀薄燃烧;燃烧特性；排放特性

Key words；GDI engine；methanol/gasoline; lean burn；combustioncharacteristi c s;

emission charact e ris t i c s

DOI；10. 13949/j. cnki. nrjgc. 2018. 02. 008

中图分类号；TK411+.2 文献标识码；A

收稿日期；2017-04-10 修回日期；2017-05-04

基金项目：国家自然科学基金项目（51276080);吉林省自然科学基金项目（20170101137JC)

Found Project：National Science Foundation of China(51276080) ；The Jilin National Science Foundation(20170101137JC)

作者筒介：黄震"<<1一），男，硕士，主要研究方向为内燃机工作过程优化与控制，huangzhen%lu@qq. com;

姜北平（通信作者），女，工程师，主要研究方向为内燃机工作过程优化与控制，jiangbp@https://www.360docs.net/doc/7313882679.html,。