Influence of injector configuration and injection pressure on a diesel engine performance
ZHENG Haopeng
ZHAO Peishan
YANG Jiacheng
HAN Fangcui
SUN Chenglei
TANG Changming
LU Shicheng
Abstract：To achieve optimal matching between the fuel injection system and the diesel engine,and to improve the engine emissions,fuel economy,and performance,based on the design validation testing of a specific diesel engine injector,this study experimentally investigates the influence of injection pressure and nozzle orifice configuration on diesel engine performance by systematically varying these parameters.The results indicate that the injection pressure and nozzle geometry are decisive factors governing fuel spray pattern and atomization characteristics.Within the high-speed operating range of the engine,increasing the injection pressure improves fuel atomization,enhances combustion efficiency,and effectively reduces the brake-specific fuel consumption(BSFC).Conversely,in the low-speed range under identical injection pressure,injectors with smaller orifice diameters yield relatively lower BSFC,suggesting that the structural parameters of the injector exert a more pronounced influence on fuel consumption in this operational regime.
Keywords：marine turbocharged diesel enginefuel injectorinjection pressurestructural parameters of fuel injectorselection test
Publication Date：2025-11-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：6( 43-48 )