This paper establishes a reliable heavy-duty braking system model that can be used for response time prediction and for vehicle braking calculations regarding the legislative requirements. For the response time prediction, a pneumatic system model of a heavy-duty vehicle is constructed by Matlab Simulink in consideration of service brake layout. To ensure the accuracy of system parameters related with pneumatic system response time experiments are conducted on two different 4 × 4 heavy-duty vehicles. The numerically calculated response time results are validated with experimental data. To improve the response time of the vehicle, design modifications are conducted on the pneumatic brake system properties. To check the compliance of the pneumatic brake system design with legislative requirements of UN Regulation 13, heavy-duty vehicle brake system (HVBS) model is developed by using Matlab Simulink. HVBS model is composed of longitudinal vehicle and wheel dynamics, Magic Formula tyre model, wheel slip and the experimentally verified heavy-duty pneumatic system model. The braking performance analyses are conducted by using HVBS model to compare the design alternatives in accordance with the legal requirements in terms of service braking and secondary braking conditions.

本文建立了可靠的重型制动系统模型，该模型可用于响应时间预测和有关立法要求的车辆制动计算。为了预测响应时间，Matlab Simulink考虑了行车制动器的布局，构建了重型车辆的气动系统模型。为了确保与气动系统响应时间相关的系统参数的准确性，我们在两种不同的4×4重型车辆上进行了实验。数值计算的响应时间结果已通过实验数据验证。为了改善车辆的响应时间，对气动制动系统的性能进行了设计修改。为了检查气动制动系统设计是否符合联合国法规13的立法要求 使用Matlab Simulink开发了重型车辆制动系统（HVBS）模型。HVBS模型由纵向车辆和车轮动力学，Magic Formula轮胎模型，车轮打滑和经过实验验证的重型气动系统模型组成。通过使用HVBS模型对制动性能进行分析，以根据法律要求在行车制动和辅助制动条件方面对设计方案进行比较。