变参数对乙醇HCCI燃烧稳定性和循环变动的影响  

The Effect of Varying Parameter on Combustion Stability and Cyclical Variation of Ethanol HCCI

作　　者：潘江如[1] 张春化[2] 鲁亚云[3] 

机构地区：[1] 新疆工程学院 [2] 长安大学 [3] 新疆职业大学

出　　处：《汽车技术》2014年第5期58-61,共4页Automobile Technology

基　　金：中央高校基本科研业务费专项资金资助(2013G1502063);新疆工程学院博士科研基金(2013BQJ091607);陕西省自然科学基础研究计划项目(2012JQ7031)

摘　　要：研究了进气温度、过量空气系数和发动机转速对乙醇HCCI燃烧稳定性和循环变动的影响。试验结果表明,随着进气温度的升高,循环变动变小,最高燃烧压力的分布较为集中;随着过量空气系数的增大,循环变动变大,最高燃烧压力的分布较为分散;随着转速的增大,循环变动变小,最高燃烧压力的平均值变大,最高燃烧压力分布集中。对于乙醇燃料,进气温度为160℃、过量空气系数为2时,1 200r/min是较优的转速。The effects of intake temperature, excess air coefficient and engine speed on combustion stability and cyclical variation of ethanol HCCI are studied in this paper. Test results show that, with the increase of intake temperature, the cyclical variation becomes smaller and distribution of the peak combustion pressure becomes concentrated; with the increase of excess air coefficient, the cyclical variation becomes bigger and distribution of the peak combustion pressure becomes relatively dispersed; while with the increase of engine speed, the cyclical variation becomes smaller, the average of the peak combustion pressure becomes bigger, and distribution of the peak combustion pressure becomes concentrated. For ethanol fuel, 1200rpm is an ideal engine speed when intake temperature reaches 160℃and excess air coefficient is 2.

关 键 词：乙醇 均质压燃 燃烧稳定性 循环变动 

分 类 号：U464[机械工程—车辆工程]