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汽车安全与节能学报

汽车安全与节能学报 ›› 2015, Vol. 6 ›› Issue (02): 184-190.DOI: 10.3969/j.issn.1674-8484.2015.02.012

• 汽车节能与环保 • 上一篇    下一篇

引燃量与压缩比对甲醇/F-T 柴油发动机燃烧特性的影响

朱建军，安俏俏，高聪慧，王 铁   

  1. 太原理工大学 机械工程学院车辆工程系，太原030024
  • 收稿日期:2015-01-28 出版日期:2015-06-25 发布日期:2015-07-08
  • 基金资助:

    清华大学汽车安全与节能国家重点实验室开放基金(KF14082)

Effects of the ignition fuel quantity and compression ratio on the combustion characteristics of a methanol/F-T diesel engine

ZHU Jianjun, AN Qiaoqiao, GAO Conghui, WANG Tie   

  1. Vehicle Engineering Department, Taiyuan University of Technology, Taiuan 030024, China
  • Received:2015-01-28 Online:2015-06-25 Published:2015-07-08

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摘要：

为改善双燃料发动机大负荷粗暴燃烧，通过一系列台架试验，研究了费托（Fischer-Tropsch，
F-T）柴油比例和发动机压缩比对此燃烧模式的燃烧特性的影响。试验中，采用煤基甲醇和F-T 合成
油柴油形成的全煤基双燃料发动机，采用高十六烷值的F-T 柴油引燃甲醇预混合气。结果表明：与
原机相比，双燃料发动机的燃烧更柔和，燃烧持续期明显缩短，经济性随F-T 柴油比例增大和压缩
比的减小而变差；随F-T 柴油比例增加，燃烧粗暴程度增大，但在低F-T 柴油比例下，降低压缩比
有利于降低燃烧粗暴程度。因此，采用低比例F-T 柴油适当减小压缩比有利于改善甲醇/F-T 柴油双
燃料发动机的燃烧和经济性能。

关键词: 双燃料发动机, F-T 柴油, 甲醇, 燃烧, 热效率

Abstract:

The effects of the Fischer-Tropsch synthetic (F-T) diesel proportion and the engine compression
ratio on the combustion characteristics in combustion mode were investigated by using bench tests to improve
the rough combustion running at heavy load for a dual-fuel engine. In the tests, an F-T diesel with high cetane
number was adopted to ignite the premixed methanol-air gas in a whole coal based dual-fuel engine with F-T
diesel and methanol. The results show that the combustion of dual-fuel engine is more gentle compared that of
original engine, the combustion duration declines obviously, and the economy becomes worse with increasing
F-T diesel portion and decreasing compression ratio. The decrease of compression ratio is conducive to reduce
the combustion rough degree under low F-T diesel portion. Therefore, by using a low F-T portion and a suitable
small compression ratio can improve the combustion performance and economy for methanol/F-T diesel dualfuel
engine.

Key words: dual-fuel engine, Fischer-Tropsch synthetic (F-T) diesel, methanol, combustion, thermal efficiency