Abstract: This paper investigates a method for implementing automatic hill-hold functionality in batterry electric vehicles using an electro-hydraulic braking (EHB) system. The approach leverages the existing slope sensor and EHB electronic brake assist system in battery electric vehicles to achieve automatic auxiliary parking assistance. In contrast to the conventional method of relying on the electric motor's immobilization, which carries the risk of motor fatigue and durability issues, this method achieves nearly 1 h of auxiliary hill-hold functionality without the need for electronic parking brake (EPB) hardware, thus reducing system costs and complexity. Through analysis of experimental data and charts, this paper evaluates the stability and adaptability of the automatic hill-hold function under different slopes and road conditions, as well as the response time and dynamic performance when the driver presses the accelerator pedal. The results showcase the performance advantages and effectiveness of this method. This technology contributes to enhancing driving safety and comfort, providing technical support for the intelligent development of battery electric vehicles.

Key words: Battery electric vehicles, Electronic hill-hold technology, EHB, Driving experience

摘要： 文章研究了一种利用线控电子液压制动（EHB）系统实现纯电动汽车自动驻坡功能的 方法，该方法利用纯电动汽车现有的坡度传感器和 EHB 电控刹车助力系统实现自动驻坡功 能，相比一般商用电动车利用驱动电机堵转的方法，避免了驱动电机疲劳耐久失效的风险， 无需电子驻车制动（EPB）硬件实现了将近 1 h 左右的自动驻坡功能，降低了系统成本和复杂 度。文章通过实验数据和图表分析了该方法在不同的坡度和路况下自动驻坡功能的保持静止 状态的稳定性和适应性，以及在驾驶员踩下油门踏板时自动驻坡功能的响应速度和动力性能， 展示了该方法的性能优势和效果。该技术有助于提高驾驶安全性和舒适性，并为纯电动汽车 的智能化发展提供了技术支持。

关键词: 纯电动汽车, 驻坡技术, EHB, 驾驶体验