Abstract: Electrical park brake (EPB) is a kind of vehicle brake-by-wire technology, which has obvious advantages over traditional parking brake systems in terms of structure and function. This technology has basically become the standard configuration of passenger vehicles, but it is rarely used in commercial vehicles with 4.5 t hydraulic brakes. Based on this situation, this article introduces the electrical park brake system development process of new energy hydraulic brake commercial vehicles, and discusses the electrical park brake development process in detail from five dimensions: functional safety, technical route, data verification, system layout and control strategy, so as to provide a standardized development process to bring some references to relevant practitioners, and be more beneficial to the development of the electrical park brake industry in commercial vehicles.

Key words: Electronic parking brake; Functional safety; Technical route; Control strategy; New energy commercial vehicle; System analysis

摘要： 电子驻车制动（EPB）是汽车线控制动技术的一种，无论是结构还是功能都比传统驻 车制动系统具有明显的优势。此项技术目前基本已经成为乘用车型的标配，但在 4.5 t 液压制 动的商用车型上应用较少。基于此种现状，文章对新能源液压制动商用车的电子驻车制动系 统开发过程进行介绍，从功能安全、技术路线、数据校核、系统布置和控制策略五个维度详 细论述了电子驻车制动的开发过程，提供一种标准化的开发流程，给相关从业人员带来一些 参考，以此更加利好电子驻车制动行业在商用车的发展。

关键词: 电子驻车制动；功能安全；技术路线；控制策略；新能源商用车；系统分析