摘要
为提高柴油机节能减排的效果,简要分析了多次喷射形式及其作用,依据车辆在不同路况运行,确定了车辆对应的6种柴油机典型工况。提出了基于工况排放值约束的多次喷射分配方法,采用工况排放分摊率确定典型工况的排放限值,进行喷射次数和变化喷射组合寻优,最后结合4JB1高压共轨柴油机台架试验,以氮氧化物和烟度为衡量参数,兼顾燃油消耗率的变化,分析不同喷射组合对柴油机排放的影响。结果表明:怠速工况和中速大负荷工况宜用2次喷射,低速小负荷工况和中速中负荷工况宜用3次喷射,中速小负荷工况宜用4次喷射,高速大负荷工况宜用1次喷射,说明基于工况排放值约束的多次喷射分配方法是有效的。
To improve the effect of energy-saving and emission-reduction of diesel engine,the brief analysis of the form and function of multiple injection is firstly made.Six typical working conditions of diesel engine for vehicle are determined based on operation in different road conditions,and then the distribution method of multiple injection is proposed based on the working condition emission limit.The emission limit value of typical working conditions is determined by the emission-sharing rate of the working condition and the injection times and injection combination solutions are optimized.Finally,combined with the bench test of 4JB1 high-pressure common rail diesel engine,taking NO x and smoke as the evaluation parameters and taking into consideration of the change of fuel consumption rate,the influence of different injection combinations on the emission of diesel engine is analyzed.The results show that it is advisable to use two injections for idle speed and medium speed and heavy load conditions,triple injections for low speed and small load conditions and medium speed and medium load conditions,quadruple injections for medium speed and light load conditions,one injection for high speed and heavy load conditions,which shows that the distribution method of multiple injection based on the restriction of emission value is valid.
作者
王军
金毅
张幽彤
丁小亮
韩树
Wang Jun;Jin Yi;Zhang Youtong;Ding Xiaoliang;Han Shu(Department of Vehicular Engineering,Army Academy of Armored Force,Beijing 100072;School of Mechanical and Vehicular Engineering,Beijing Institute of Technology,Beijing 100081)
出处
《汽车工程》
EI
CSCD
北大核心
2020年第2期157-163,177,共8页
Automotive Engineering
基金
国家自然科学基金(51305457)资助
关键词
柴油机
喷油器
典型工况
多次喷射
分配
diesel engine
injector
typical working condition
multiple injection
distribution
作者简介
通信作者:金毅,副教授,博士,E-mail:13581748524@163.com。
