双阀电控单体泵系统的喷射特性研究  

Research on Injection Characteristics of Dual-Valve Electronic Unit Pump System

作　　者：范立云[1] 陈超[1] 王作群 宋恩哲[1] 扈爽[1] 张建宇[1] 

机构地区：[1]哈尔滨工程大学动力与能源学院,黑龙江哈尔滨150001

出　　处：《汽车工程学报》2015年第4期244-251,共8页Chinese Journal of Automotive Engineering

基　　金：国家自然科学基金(51379041;51279037);教育部科学技术研究项目(113060A);高技术船舶资助项目(G034813048)

摘　　要：在AMESim环境下建立双阀电控单体泵系统的仿真模型,通过试验对比验证模型的准确性。研究压力峰值、喷油量及平均喷油速率等在低转速范围内随控制角度差和转速的变化规律,并探索双阀系统的三次喷射特性。试验结果表明,在低转速下,增加控制角度差能明显改善喷油特性,控制角度差小于4°(一定角度)时,喷油压力、平均喷油速率等随控制角度差的增加变化不明显,而喷油量增量随控制角度差的增加变化相对稳定。采用变速率凸轮型线能有效降低后喷射的喷射压力,有利于灵活控制后喷射的喷油量。The paper established a simulation model for the double-valve electronically controlled fuel injection system using AMESim and the accuracy of the model was proved by comparing to experinaental results. The paper studied, in the low speed range, the variation of peak pressure, the fuel injection quantity and the average injection rate with respect to rotational speed and the difference in the controlled angle, and explored the three injections characteristics of double valve system. It is found that, at low speeds, increasing the angle difference can significantly improve the injection characteristics.When the angle difference is smaller than 4v （a certain angle） , the injection pressure and the average injection rate do not change significantly The increment in the fuel injection quantity remains relatively stable with the increasing angle difference. The use of a variable-speed cam profile can effectively reduce the injection pressure in post injection, allowing more flexible control of fuel injection quantity in post injection.

关 键 词：柴油机 双阀 单体泵 控制角度差 三次喷射 

分 类 号：TK422[动力工程及工程热物理—动力机械及工程]