生物柴油/柴油混合燃料喷油提前角优化  

Optimization of Injection Advance Angle of Biodiesel/diesel Fuel

作　　者：陈昊[1] 白喆[1] 王娇[1] 王琪[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《河南科技大学学报（自然科学版）》2010年第1期31-33,49,共4页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家西部交通建设科技项目(200631826253)

摘　　要：为了得到使用生物柴油/柴油混合燃料的最佳喷油提前角,对不同角度混合燃料的燃烧和排放特性进行了研究。结果表明:喷油滞后(提前),燃烧压力、压力升高率与瞬时燃烧放热率降低(增加),曲线后移(前移)。NOx排放降低(增加),且随着负荷的增加,降低(增加)的幅度增大。原机条件下混合燃料烟度最低,喷油提前和滞后都会引起烟度的增加。喷油适当滞后(降低3°)可以在烟度增加不多的情况下有效控制生物柴油/柴油混合燃料的NOx排放,同时压力升高率的降低会使发动机工作更加柔和。To get the best injection advance angle of biodiesel/diesel mixed fuel,combustion and emssion performances of the fuel are analyzed at different angles.Results indicate that with the delay of injection(advance),combustion pressure,pressure increase ratio and instantaneous heat release ratio decrease(increase)and the curves of these parameters move behind(frontly).NOx emission decreases(increase)and the decreaing(increase)range increases with the raise of loads.Smoke emission of mixed fuel at initial angle is the lowest and the delay or advance of the angle increases smoke emission.Suitable delay(three degrees crank angle)can effectively control the NOx emission of the mixed fuel and make engine operate more stably and mildly when the increase of smoke emission is not large.

关 键 词：生物柴油 柴油混合燃料 燃烧 排放 喷油提前角 

分 类 号：TK411.71[动力工程及工程热物理—动力机械及工程]