提高汽车ESP系统液压控制单元柱塞泵效率的仿真研究

柱塞泵是汽车ESP(Electronic Stability Program)系统液压控制单元（Hydraulic Control Unit，HCU）的关键部件之一，其泵油能力直接影响液压控制单元对控制指令的执行力度，在ESP系统不同工作模式下都起到重要作用，因此需要深入分析柱塞泵的结构和参数，以提高其泵油效率。本文根据柱塞泵径向单柱塞的结构特点推导出其数学模型，采用 AMESim的液压元件设计功能建立其详细的仿真模型，并经过了试验验证。通过仿真得出泵吸油阀和压油阀能否及时配合柱塞腔的体积变化对泵的工作有着重要影响。在此基础上，进一步深入分析影响柱塞泵效率的几个关键参数，为泵的设计开发提供参考依据。

Simulation Research on Improving the Efficiency of Piston Pump of Automotive ESP#br#

The piston pump is one of the critical parts of hydraulic control unit (HCU) of automotive electronic stability program（ESP）. Its performance has a direct effect on the actuation of HCU. Thus the piston pump plays an important part during the different work patterns of ESP. It is necessary to analyze structure and parameters of the pump for being improved its efficiency. Based on its structure characteristics of being single radial piston, the pump’s mathematic model is established. Besides, the detail simulation model of piston pump is built up by the HCD (hydraulic component design) method of AMESim software, which is also verified by test. As a result, the importance is shown whether the actuation of inlet valve and outlet valve of pump can keep up with the volume change of piston chamber. Consequently, it is figured out that the crucial parameters on improving the pump’s efficiency. The result can provide references for the design and development of the piston pump.