DMC/柴油混合燃料共轨柴油机燃烧循环变动研究  

Combustion Cyclic Variations of Common-rail Diesel Engine Fueled with DMC /Diesel Blend

作　　者：梅德清[1] 任华[1] 姜士阳[1] Baar Roland 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013 [2]柏林工业大学机械与交通工程系,柏林10587

出　　处：《农业机械学报》2014年第8期14-18,65,共6页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(51076069);江苏高校优势学科建设工程资助项目(苏政办发[2011]6号)

摘　　要：研究了不同条件下DMC/柴油混合燃料共轨发动机的燃烧循环变动,以及COHR和EGR率对燃烧循环变动的影响。结果表明:共轨发动机燃用不同燃料时的燃烧循环变动率都较小;D10燃料燃烧的循环变动率大于纯柴油;发动机大负荷时的循环变动率相对较小;随着COHR的增加,以pmi为表征参数的循环变动系数变化不明显;以pmax为表征参数的循环变动系数略有增大,而以θd为表征参数的循环变动系数明显增长;D10燃料的循环变动系数随EGR率的增加呈缓慢增长,柴油则相对平稳;高的平均指示压力对应着短的火焰发展期。The combustion cyclic variations of DMC/diesel burned in a common-rail engine under different conditions are studied, and the influences of COHR and EGR on combustion cyclic variations are also carried out. Results show that the combustion cyclic Variations of different fuels burned in the common-rail engine are relatively small. The combustion cyclic variations of D10 are greater than that of diesel. The combustion cyclic variations at high load are relatively low. With the increase of COHR, the cyclic variations coefficient of Pmi are not obvious, while the characteristic parameter for Pmax grows slightly and that for θd grows obviously. The rise of EGR rate could cause the slow increase of cyclic variation coefficients of D10 fuel, while that for diesel is relatively smooth. The high mean indicated effective pressure corresponds to short flame developing period.

关 键 词：碳酸二甲酯 高压共轨柴油机 燃烧 循环变动 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]