燃烧室斜切唇口对柴油机燃烧、排放及可靠性的影响
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- 英文论文题名：Effects of Combustion Chamber with Bevel-cut Lip on the Combustion Emission and Reliability in Diesel Engine
- 论文作者：陈长军 ; 包宁 ; 赵伟 ; 金华玉 ; 胡芳
- 英文论文作者：Chen Changjun ; Bao Ning ; Zhao Wei ; Jin Huayu ; Hu Fang
- 年：2016
- 作者机构：中国第一汽车股份有限公司技术中心发动机部;
- 论文关键词：燃烧室 ; 斜切唇口 ; 燃烧 ; 排放 ; 可靠性
- 英文论文关键词：combustion chamber ; bevel-cut lip ; combustion ; emission ; reliability
- 会议召开时间：2016-10-26
- 会议录名称：2016中国汽车工程学会年会论文集
- 英文会议录名称：Proceedings of 2016 SAE-China Congress
- 语种：中文
- 分类号：U464.172
- 学会代码：QCGC
- 会议名称：2016中国汽车工程学会年会暨展览会
- 会议地点：中国上海
- 主办单位：中国汽车工程学会
- 学会名称：中国汽车工程学会
- 页数：5
- 文件大小：1822k
- 原文格式：O
- 会议级别：全国
摘要
本文利用三维数值仿真软件STAR-CD对斜切唇口燃烧室对缸内燃烧过程、排放物生成以及可靠性的影响规律进行了仿真研究。结果表明,A100工况下,斜切唇口燃烧室凹坑里分配的燃油减少,部分燃油沿斜切线向上部富氧区域运动,中后期燃烧得到改善,油耗降低,Soot排放降低,NO_x排放增加。斜切唇口消除了活塞顶面尖角,降低了活塞开裂风险,提高了可靠性,但斜切唇口也会使得更多燃油蒸气到达缸壁。
The effects of combustion chamber with bevel-cut lip on the combustion emission and reliability were numerically analyzed by STAR-CD.The results show that:with the operation of AlOO,less fuel injected into the chamber with bevel-cut lip,a part of fuel moved to the upper zone of rich oxygen along the bevel-cut line,and in the middle and later stage,combustion were greatly improved,and fuel consumption and the Soot emissions decreased,but the NO_x emissions increased.The bevel-cut lip could eliminate the sharp angle and reduce the risk of crack of piston,and then improve the piston reliability,but with bevel-cut lip much more fuels could reach the cylinder liner,which can influence the lubrication.
The effects of combustion chamber with bevel-cut lip on the combustion emission and reliability were numerically analyzed by STAR-CD.The results show that:with the operation of AlOO,less fuel injected into the chamber with bevel-cut lip,a part of fuel moved to the upper zone of rich oxygen along the bevel-cut line,and in the middle and later stage,combustion were greatly improved,and fuel consumption and the Soot emissions decreased,but the NO_x emissions increased.The bevel-cut lip could eliminate the sharp angle and reduce the risk of crack of piston,and then improve the piston reliability,but with bevel-cut lip much more fuels could reach the cylinder liner,which can influence the lubrication.
引文
[1]周龙保.内燃机学[M].北京:机械工业出版社,1999.
[2]马学军,刘涛,王志强,等.影响活塞燃烧室可靠性的结构因素研究[J].内燃机与动力装置,2006(4).
[2]马学军,刘涛,王志强,等.影响活塞燃烧室可靠性的结构因素研究[J].内燃机与动力装置,2006(4).