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重庆交通大学学报（自然科学版）

重庆交通大学学报（自然科学版） ›› 2011, Vol. 30 ›› Issue (2): 311-314.DOI: 10.3969/j.issn.1674-0696.2011.02.31

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点火提前角对CNG发动机燃氢怠速性能的影响

何义团1，2，安娜1，邓蛟2，Nashay Naeve2，马凡华2   

  1. 1.重庆交通大学机电与汽车工程学院， 重庆400074; 2.清华大学汽车安全与节能国家重点实验室， 北京100084
  • 收稿日期:2010-10-15 修回日期:2010-12-23 出版日期:2011-04-15 发布日期:2015-03-12
  • 作者简介:何义团(1977 — )，男，四川旺苍人，副教授，在站博士后，主要研究方向:代用燃料发动机技术。E-mail:heyituan@163.com。
  • 基金资助:
    重庆市教委科学技术研究项目(KJ100423);重庆市自然基金项目(CSTC,2010BB4264);汽车安全与节能国家重点实验室基金项目 (zz2010-062)

Effect of Ignition Advance Angle on Idle Performance of Hydrogen Fueled CNG Engine

HE Yituan1, 2, AN Na1, DENG Jiao2, NASHAY Naeve2, MA Fanhua2   

  1. 1.School of Mechatronics&Automotive Engineering, Chongqing Jiaotong University, Chongqing 400074, China;2.StateKey Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  • Received:2010-10-15 Revised:2010-12-23 Online:2011-04-15 Published:2015-03-12

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摘要： 为了研究点火提前角i对CNG发动机燃氢怠速性能的影响,在一台天然气发动机上进行了燃氢怠速性能试 验。固定转速800r/min,过量空气系数??=2,i从上止点前20??A到0??A变化。结果表明:随着i减小,火焰发展 期减小而快速燃烧期增加。当i>16??A,大部分燃料在上止点前燃烧,负功增加,指示热效率低；i=10??A左右, 指示热效率最高,且排放指标较小。对于燃氢发动机,怠速稀燃工况下,不具备产一定量CO和HC的条件。为了降 低燃氢发动机的NOx排放,满足稀燃条件的同时,需要适当减小点火提前角。

关键词: CNG发动机, 氢气, 点火提前角, 怠速性能

Abstract: To study the effect of ignition advance angle (〖θ 〗_i) on idle performance of a hydrogen fueled CNG engine, an idle performance test was conducted on a hydrogen fueled CNG engine. The engine speed was fixed at 800r/min; the excess air ratio was set at λ= 2 and 〖θ 〗_i was adjusted from 20℃ A BTDC to 0℃ ABTDC. The results demonstrated that as 〖θ 〗_i was reduced, the flame development angle decreased and the rapid combustion period increased. When > 16℃ A, most of the fuel was combusted before TDC; the negative power increased and the indicated thermal efficiency was rather low. When 〖θ 〗_i was around 10℃ A, the indicated thermal efficiency reached its top value and the exhaust emissions were rather low. To a hydrogen fueled engine, the combustion conditions were not enough to produce certain amount of CO and HC under conditions o f idle and lean burning; 〖θ 〗_i should be reduced properly to reduce NOx emissions

Key words: CNG engine, hydrogen, ignition advance angle, idle performance

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