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In order to improve the injection performance of high pressure common rail fuel system and optimize the design of electronic control injector more effectively, the simulation model of high pressure common rail fuel system was built by using AMESim simulation platform, and the accuracy of the simulation model was verified by comparing with the experimental data. In this paper, the needle opening response, needle closing response and cycle fuel injection were used as performance evaluation indicators, the AMESim model was used to carry out quantitative analysis of evaluation indicators. Through quantitative analysis, the key characteristic parameters are identified and those are solenoid valve preload, control valve stem lift, control cavity oil inlet orifice diameter, control cavity oil outlet orifice diameter, needle lift and nozzle diameter.

Electronic in-line pump system (EIPS) is an electronic controlled fuel injection system which meets China's emission regulations. In this paper, a numerical model of EIPS was developed in AMESim for the purpose of creating a tool for simulation experiments. Experiments were conducted at the same model conditions to validate the model. The results are quite encouraging and in agreement with model predictions which imply that the model can accurately predict the dynamic injection characteristics of EIPS. The design of experiments was performed using a 2-level-5-factor face-centered central composite design (FCCD) method in order to study the interactive effect of factors on fuel injection quantity fluctuation (FIQF). The factors studied were supply fuel pressure, cam linear velocity, control valve lift, needle spring pretightening force and nozzle flow coefficient.