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The fuel supply quantity of high-pressure pump and the fuel supply quality from constant pressure valve to high pressure vitta was very important to capacity of the diesel engine. In this paper, the model of the fuel injection system is established by Hydism and the model is integrated with Isight in DOE research. According to the DOE results, two optimization interdigitations were used to optimize the fuel injection system to improve the cubage efficiency of high- pressure pump and the flow capacity of delivery valve. The optimization results showed that the united use with system model and DOE in optimization design of the fuel injection system is effectively and the cubage efficiency of pump could be promoted 5.97 % and the flow capacity of delivery valve could be promoted 24.65%.

The Structure Optimization of Diesel Injection Pump Based on DOE