[1]占文锋,罗亨波,陈泓,等.预燃室射流点火对汽油发动机性能影响[J].内燃机学报,2022,(03):193-199.
　Zhan Wenfeng,Luo Hengbo,Chen Hong,et al.Effect of Pre-Chamber Jet Ignition on Gasoline Engine Performance[J].,2022,(03):193-199.
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预燃室射流点火对汽油发动机性能影响
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《内燃机学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2022年03
页码:
193-199
栏目:
出版日期:
2022-05-25

文章信息/Info

Title:
Effect of Pre-Chamber Jet Ignition on Gasoline Engine Performance
作者:
占文锋; 罗亨波; 陈泓; 李钰怀; 杜家坤
1. 华南理工大学 机械与汽车工程学院，广东 广州 510640； 2. 广州汽车集团股份有限公司 汽车工程研究院，广东 广州 511434
Author(s):
Zhan Wenfeng; Luo Hengbo; Chen Hong; Li Yuhuai; Du Jiakun
1. School of Mechanical & Automotive Engineering，South China University of Technology，Guangzhou 510640，China； 2. Research & Development Center，Guangzhou Automobile Group Company Limited，Guangzhou 511434，China
关键词:
汽油发动机; 预燃室; 射流点火; 点火能量; 稀燃
Keywords:
gasoline engine; pre-chamber; jet ignition; ignition energy; lean burn
分类号:
TK411
文献标志码:
A
摘要:
基于一台单缸汽油发动机，设计了主动预燃室系统，试验了预燃室混合气状态对燃烧及排放的影响，通过对比不同点火能量的火花塞点火和预燃室点火，明确预燃室射流点火对燃烧过程影响机理．结果表明：随着预燃室内喷油量的增加，颗粒物数量(PN)排放增加；预燃室内浓混合气能改善燃烧相位、加快燃烧速度，提高点火性能，但预燃室内当量比附近的混合气有更大的节油潜力．当全局过量空气系数fglobal小于1.4时，预燃室点火燃油消耗率恶化；当fglobal大于1.4时，预燃室改善热效率的能力开始凸显．当预燃室中燃油量占总循环油量的分数为2%时，预燃室点火能将稀燃极限扩展至fglobal为2.1，在fglobal为1.8时总指示热效率达到48.5%的最大值．
Abstract:
An active pre-chamber system was designed and the effect of the pre-chamber mixture state on combustion and emissions were experimentally studied on a single cylinder gasoline engine. The influence of pre-chamber jet igni-tion on combustion characteristics was also analyzed by comparison of traditional ignition with different ignition energy and the pre-chamber ignition. The results show that gasoline spray hits the wall of the pre-chamber inevita-bly leading to soot generation，and the soot generation increases when the amount of fuel injected in the pre-chamber increases. A richer mixture in the pre-chamber can improve the combustion phase，speed up the combus-tion and improve the ignition performance，but a stoichiometric ratio mixture in the pre-chamber has better fuel economy. When the ?global is less than 1.4，the thermal efficiency of the pre-chamber ignition decreases. When ?global is greater than 1.4，the thermal efficiency of the pre-chamber ignition begins to improve obviously. The pre-chamber ignition can extend the lean burn limit to ?global 2.1 with 2% mass fraction fuel injected into the pre-chamber，and the GITE reaches the maximum value of 48.5% when ?global is 1.8.

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更新日期/Last Update: 2022-05-25