电子驻车制动器性能关键影响因素探究

Exploration of Key Influencing Factors on the Performance of Electronic Parking Brake

摘要: 电子驻车制动器(EPB)作为汽车制动系统核心部件，其性能直接关乎行车安全。鉴于车辆运输过程中EPB长时间处于夹紧状态可能引发性能变化，本研究搭建运输耐久测试系统，开展EPB运输耐久及后续性能测试。通过设置不同力矩与测试次数工况，结合低温(−40℃)和高温(120℃)极端环境条件，探究多因素对EPB性能的影响。试验数据表明，随着力矩和测试次数的增加，EPB效率明显下降；在环境因素影响方面，高温(120℃)相较低温(−40℃)对EPB效率的衰减作用更为突出。本研究成果为优化EPB设计、制定合理维护策略及提升汽车制动系统可靠性提供了重要参考依据。

Abstract: The electronic parking brake (EPB), as a core component of the automotive braking system, directly affects driving safety in terms of its performance. Considering that EPB being in a clamped state for a long time during vehicle transportation may cause performance changes, this study establishes a transportation durability testing system to conduct EPB transportation durability and subsequent performance testing. By setting different torque and testing conditions, combined with extreme environmental conditions of low temperature (−40˚C) and high temperature (120˚C), the influence of multiple factors on the performance of EPB is explored. The experimental data shows that with the increase of torque and testing times, the efficiency of EPB significantly decreases; In terms of environmental factors, high temperature (120˚C) has a more prominent attenuation effect on EPB efficiency compared to low temperature (−40˚C). This research provides important reference for optimizing EPB design, formulating reasonable maintenance strategies, and improving the reliability of automotive braking systems.