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汽车安全与节能学报

JASE ›› 2016, Vol. 07 ›› Issue (04): 412-419.DOI: 10.3969/j.issn.1674-8484. 2016.04.009

• 汽车节能与环保 • 上一篇    下一篇

降低压缩比改善HCII 燃烧中高负荷特性的试验研究

佟德辉1，任烁今2，李云强1，王志坚1，张海燕1，王 志2，王建昕2   

  1. 1. 潍柴动力股份有限公司，潍坊 261001，中国；
    2. 清华大学 汽车安全与节能国家重点实验室，北京 100084，中国
  • 收稿日期:2016-07-20 出版日期:2016-12-25 发布日期:2016-12-28
  • 作者简介:佟德辉（1964—），男（汉），山东，研究员。E-mail: tong@weichai.com
  • 基金资助:

    内燃机可靠性国家重点实验室开放基金项目（skler-201601）

Experimental investigation of improving HCII combustion at medium and high load by reducing compression ratio

TONG Dehui 1, REN Shuojin 2, LI Yunqiang 1, WANG Zhijian1, ZHANG Haiyan 1, WANG Zhi 2, WANG Jianxin2   

  1. 1. Weichai Power Co., Ltd., Weifang 261001, China;
    2. State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
  • Received:2016-07-20 Online:2016-12-25 Published:2016-12-28

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摘要：

均质混合气引燃（HCII）燃烧方法具有高效率低排放的特点，但是在中高负荷工况条件下，汽油比例受到粗暴燃烧的限制。本文采用降低压缩比方法以改善HCII 中高负荷燃烧粗暴的问题，并在重型多缸柴油机上进行了试验验证。结果表明，将压缩比由18 降为16 能够有效控制发动机的最高燃烧压力，拓展汽油比例的范围，由此明显改善了HCII 在中高负荷的燃烧和排放特性，尤其是碳烟排放的降幅在特定工况能够接近50%。本文研究结果对其他双燃料发动机也有一定参考价值。

关键词: 内燃机, 均质混合气引燃（HCII）, 粗暴燃烧, 压缩比, 汽油比例, 排放特性

Abstract:

Homogeneous charge induced ignition (HCII) combustion can achieve low emissions and high efficiency. However, the gasoline ratio of HCII combustion at medium and high load is limited by rough combustion. In this paper, a lower compression ratio was utilized to relieve the rough combustion at medium and
high load. This strategy was verified by experiments on a heavy-duty multi-cylinder engine. The results show that by reducing the compression ratio from 18 to 16 the peak in-cylinder pressure is effectively reduced and the gasoline ratio range can be obviously extended. Thus, the combustion and emission characteristics of HCII at medium and high load are noticeably improved. The reduction of soot emissions at specific operating conditions can be close to 50%. These results also have reference value for other dual fuel engines.

Key words: internal combustion engine, homogeneous charge induced ignition (HCII), rough combustion, compression ratio;, gasoline ratio, emission