摘要
采用试验与仿真结合的方法研究电控化改造对柴油机性能的影响。分别用AMESim和AVL_FIRE仿真软件建立燃油喷射系统模型与柴油机缸内燃烧高压循环模型,以喷油压力为优化目标对喷油参数进行匹配,并将优化结果代入到燃烧模型中计算分析。以优化结果为基础进行台架试验,分析电控化改造对柴油机经济性和排放性的影响。研究结果表明,对于15mm×2.5mm×0.40 mm/°CA×0.30mm×900mm(柱塞直径×油管直径×凸轮型线速率×喷孔直径×油管长度)的组合(试验号8),喷油压力相对于原机提高了40.2%。试验号8的台架试验表明:油耗率有所降低,且在低速低负荷工况下油耗率降低较显著;对于NOx排放,电控化改造后试验号8的NOx排放浓度在负荷特性工况和推进特性工况下相对于原机平均降幅分别在50%以上。
In order to enhance the performance of a diesel engine, modification of electronic control of the fuel injection system in the engine is studied through both of experiment and simulation. Simulation models for the fuel injection system and high pressure circulation in the diesel engine cylinder are established separately by using software AMESim and AVL_FIRE. Injection pressure is taken as an optimal object to match the parameters of the injection system, and then the optimal solution will be introduced into the combustion model for further calculation. Experiment is carried out to analyze the influence of the electronic-controlled system on the performances in economic and emission. It is shown that the pressure of fuel injection is enhanced by 40.2%, while the overall reduction in fuel consumption and fuel consumption rate decreases significantly in low speed and low load conditions, and concentration of NOx emission is reduced by 50% under the load condition and propulsion condition.
出处
《中国造船》
EI
CSCD
北大核心
2017年第2期199-209,共11页
Shipbuilding of China
基金
国家自然科学基金资助项目(51279066)
福建省自然科学基金资助项目(2017J01486)
关键词
柴油机
燃油喷射系统
参数匹配
油耗率
NOX排放
marine diesel engine
fuel injection system
matching of parameters
fuel consumption rate
NOx emission
