4190ZLC-2柴油机燃油喷射系统参数匹配试验

基于4190ZLC-2船用中速柴油机电控化改造燃烧与性能测试平台，测取在额定工况下不同供油提前角柴油机的性能参数，分析供油提前角对柴油机运行性能的影响规律，并根据不同凸轮作用段在最佳供油提前角的对比选型，发现“14.6℃A”凸轮作用段具有较好的喷油特性。在柱塞直径、喷油提前角和凸轮作用段分别为14 mm、26℃A和14.6℃A时，测试与分析了喷孔直径变化对负荷特性和推进特性的影响。结果表明:综合性能最佳的喷孔直径为0.26 mm，其在满足经济性前提下的NOx排放较优，可为燃油喷射系统参数匹配提供理论依据和试验依据。

Experimental Research on Parameter Matching of Fuel Injection System of 4190ZLC-2 Diesel Engine

Based on the combustion and performance test platform,the working parameters of the diesel engine were measured by changing the fuel supply advance angle under the rated condition to analyze the influence of the fuel supply advance angle on the operational performance of the engine.Comparisons were made for determination of the best fuel supply advance angle by the experimental results from different cam action segments. It was found that the 14.6°CA cam action segment has better fuel injection characteristics,and the matching between plunger diameter,injection advance angle and cam action segment should respectively be 14 mm,26°CA and 14.6°CA under the working conditions.It was also noted that orifice diameter about 0.26 mm can bring about the optimal performance of better NOx emission.Conclusions were drawn that the results from the research can be a reference for the fuel injection system matching for further researches.