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汽车安全与节能学报 ›› 2013, Vol. 4 ›› Issue (4): 367-371.DOI: 10.3969/j.issn.1674-8484.2013.04.010

• 汽车节能与环保 • 上一篇    下一篇

乙醇汽油混合燃料直喷均质压燃爆震模型和试验研究

1. 同济大学 汽车学院，上海 200092，中国；2. 同济大学 中德学院，上海 200092，中国   

  1. 1. 同济大学 汽车学院，上海 200092，中国；2. 同济大学 中德学院，上海 200092，中国
  • 出版日期:2013-12-25 发布日期:2014-01-15
  • 作者简介:邓俊（1978—），男（汉），江西，副教授。E-mail ：eagledeng@tongji.edu.cn
  • 基金资助:

    国家自然基金资助项目（51006075，51076118）；教育部博士点基金项目 (20120072110015）；湖北省重点实
    验室开放基金项目（ZDK201213）

Experimental studies on knocking characteristics of DI-HCCI#br# with gasoline/ethanol fuels

邓 俊，史 现，刘寅童，吴志军，李理光   

  1. 1. School of Automotive Studies, Tongji University, Shanghai 201804, China;
    2. The Chinese-German College, Tongji University, Shanghai 201804, China
  • Online:2013-12-25 Published:2014-01-15

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摘要：

为研究直接喷射(DI) 式均质压燃（HCCI）爆震特性，进行了台架试验。改造了一台传统双缸
柴油机的供油系统、点火系统、进排气机构，使其具有缸内直喷乙醇汽油混合燃料HCCI 燃烧模式。
根据该发动机台架的特点与缸压信号特征，建立了描述乙醇汽油HCCI 燃烧的爆震模型，从模型中提
取了爆震强度（KI），并进行了试验测量。结果表明：随乙醇在混合燃料中体积分数的升高，平均KI
和爆震概率均有降低，爆震始点推后；爆震工况的当量比范围变窄，爆震工况上下边界互相靠拢。该
结果有利于提出更合理的发动机喷射控制策略。

关键词: 柴油机, 喷油控制策略, 均质压燃(HCCI) , 混合燃料, 乙醇汽油, 爆震强度（KI）

Abstract:

Knocking characteristics were investigated by using engine bench tests for a combustion of DI-HCCI
(direct-injection homogeneous charge compression ignition) with blend fuels of ethanol and gasoline. Some
improvements were done to a traditional two-cylinder diesel engine in fuel supply system, ignition system, and
inlet and exhaust system. A knock model was established according to the engine bench tests and the cylinder
pressure signals to describe ethanol and gasoline HCCI combustion. Knock intensity (KI) was drawn from the
model and then was measured in the tests. The results show that the average KI and the knock probability
significantly decrease with the blending ratio of ethanol and gasoline, i.e. the percentage of ethanol increases,
while the knock starting phase retards. Knock boundaries also narrow down with high blending ratio, while the
upper and lower boundaries move towards each other. Those results could lead to the development of better
fuel injection strategies.

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