高压共轨系统循环喷油量波动交互作用分析*

doi:10.19562/j.chinasae.qcgc.2019.011.003

Abstract

Abstract: The fuel injection quantity stability of high pressure common rail system is influenced by the variation of electronic controlled injector parameters, which affects the working consistency and reliability of the diesel engines. In this paper, a numerical model including common rail, high pressure fuel pipeline and injector is proposed based on bond graph theory. The experimental results show that the model can predict the fuel injection quantity fluctuation accurately. The investigation scheme is formulated using experiment design method, and the fuel injection quantity fluctuation response surface model is obtained which can predict the fuel injection quantity fluctuation well. The influence of interaction between parameters on fuel injection quantity fluctuation is analyzed based on response surface method. The results indicate that the interaction between inlet orifice diameter and nozzle hole diameter, inlet orifice diameter and needle lift, nozzle hole diameter and control valve reset spring pre-tightening force, nozzle hole diameter and needle lift, control valve reset spring pre-tightening force and needle lift has significant effect on fuel injection quantity fluctuation, which can provide theoretical guidance for the numerical modeling and optimal design of high pressure common rail system.

Key words: diesel engine, high pressure common rail system, fuel injection quantity fluctuation, bond graph, interaction

Bai Yun, Lan Qi, Sha Haonan, Fan Liyun, Ma Xiuzhen. Interaction Analysis on Cycle Fuel Injection Quantity Fluctuation for High Pressure Common Rail System[J].Automotive Engineering, 2019, 41(11): 1243-1250.

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Interaction Analysis on Cycle Fuel Injection Quantity Fluctuation for High Pressure Common Rail System

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