机油和过量空气系数对GDI汽油机燃用甲醇汽油颗粒排放的影响

刘成豪; 曾东建; 左子农; 汪建忠; 李翔; 王瑜

doi:10.3969/j.issn.1001-2222.2019.03.013

车用发动机 >

2019 , Vol. 0 >Issue 3: 81 - 87

DOI: https://doi.org/10.3969/j.issn.1001-2222.2019.03.013

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机油和过量空气系数对GDI汽油机燃用甲醇汽油颗粒排放的影响

刘成豪 ,
曾东建 ,
左子农 ,
汪建忠 ,
李翔 ,
王瑜

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（1.西华大学汽车与交通学院，四川成都 610039；2.流体及动力机械教育部重点实验室（西华大学），四川成都 610039；3.天津大学内燃机燃烧学国家重点实验室，天津 300072；4.绵阳新晨动力机械股份有限公司，四川绵阳 621000）

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Influences of Lubricant and Excess Air Coefficient on Particulate Matter Emission of GDI Engine Fueled with Gasoline-Methanol Blends

LIU Chenghao ,
ZENG Dongjian ,
ZUO Zinong ,
WANG Jianzhong ,
LI Xiang ,
WANG Yu

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（1.School of Transportation and Automotive Engineering,Xihua University,Chengdu 610039，China;2.Ministry of Education Key Laboratory of Fluid and Power Machinery（Xihua University）,Chengdu 610039，China；3.State Key Laboratory of Engines,Tianjin University,Tianjin 300072，China；4.Mianyang Xinchen Engine Co.，Ltd.，Mianyang 621000，China）

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摘要

利用1台缸内直喷增压汽油机，在97号汽油和甲醇汽油中掺混体积分数为2%和4%的机油，探究机油以及不同过量空气系数对发动机颗粒排放特性的影响。试验研究表明：随着燃料中甲醇比例的增大, 排气颗粒数浓度、总数浓度、质量浓度和总质量浓度均降低,机油消耗和过量空气系数对排放颗粒浓度的影响逐渐减弱；随着机油掺混体积分数的升高和过量空气系数的减小，排气颗粒浓度都明显上升；发动机的排气颗粒数浓度主要分布在核态区域，而质量浓度分布则不同，主要集中在积聚态和粗态区域。

关键词： 直喷式汽油机; 甲醇; 机油; 颗粒

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刘成豪 , 曾东建 , 左子农 , 汪建忠 , 李翔 , 王瑜 . 机油和过量空气系数对GDI汽油机燃用甲醇汽油颗粒排放的影响[J]. 车用发动机, 2019 , 0(3) : 81 -87 . DOI: 10.3969/j.issn.1001-2222.2019.03.013

Abstract

The influences of lubricant and different excess air coefficients on engine particulate matter emission was studied on a T-GDI engine by adding 2% and 4% volume fraction of lubricant into 97# gasoline and methanol gasoline. The results show that the particulate number (PN) concentration, the total number concentration, the particulate mass (PM) concentration and the total particulate mass concentration decrease and the influences of oil consumption and excess air coefficient on exhaust particle concentration decrease gradually with the increase of methanol proportion. The exhaust particle concentration significantly increases with the increase of mixing volume fraction of lubricant and the decrease of excess air coefficient. In addition, the PN concentration lies in the nuclear area and the PM concentration lies in the accumulation and coarse area.

Key words： gasoline direct injection engine；methanol; lubricating oil; particulate

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