The contribution of the tire-road slip of traction wheels to the total resistance opposing the motion of a light-duty commercial vehicle has been investigated through the simulation of several homologation and custom driving cycles. The calculation of the contribution of the tire slip losses was based on the estimation of the longitudinal tire slip, by means of Pacejka’s MF5.2 tire model. In this work, the computational steps required to evaluate this contribution were implemented in a previously developed fuel consumption simulation tool. Simulations were performed under several vehicle loading conditions and tire inflation pressures on traction and non-traction wheels, and considering different tire-road adherence conditions, in order to obtain a characterization of the tire slip losses over a wide range of working conditions. An analysis of the results shows that, although the contribution of tire slip losses to the total vehicle energy demand and fuel consumption may be relevant – especially under low-load, low adherence conditions – the sensitivity of the average on-cycle vehicle energy/fuel consumption to changes in the tire inflation pressure is only affected slightly by tire slip losses. Therefore, tire slip losses can be neglected in practice, when the aim of a simulation is to optimize the tire pressure to achieve average vehicle working conditions over a driving cycle.

通过模拟几个认证和自定义驾驶循环，研究了牵引轮的轮胎-路面滑移对抵抗轻型商用车运动的总阻力的贡献。轮胎滑移损失贡献的计算基于纵向轮胎滑移的估计，通过 Pacejka 的 MF5.2 轮胎模型。在这项工作中，评估这种贡献所需的计算步骤是在以前开发的燃料消耗模拟工具中实现的。模拟是在牵引轮和非牵引轮上的几种车辆负载条件和轮胎充气压力下进行的，并考虑了不同的轮胎-道路附着条件，以获得广泛工作条件下轮胎滑移损失的特征。结果分析表明，虽然轮胎打滑损失对车辆总能量需求和燃料消耗的贡献可能是相关的——尤其是在低负载、低依从性条件下——但平均循环车辆能量/燃料的敏感性轮胎充气压力变化的消耗仅受轮胎滑移损失的轻微影响。因此，当仿真的目的是优化轮胎压力以在一个驾驶周期内实现平均车辆工作条件时，轮胎滑移损失在实践中可以忽略不计。低依从性条件——平均循环车辆能量/燃料消耗对轮胎充气压力变化的敏感性仅受轮胎滑动损失的轻微影响。因此，当仿真的目的是优化轮胎压力以在一个驾驶周期内实现平均车辆工作条件时，轮胎滑移损失在实践中可以忽略不计。低依从性条件——平均循环车辆能量/燃料消耗对轮胎充气压力变化的敏感性仅受轮胎滑动损失的轻微影响。因此，当仿真的目的是优化轮胎压力以在一个驾驶周期内实现平均车辆工作条件时，轮胎滑移损失在实践中可以忽略不计。