汽车在不平道路上的制动过程分析

Vehicle Braking Procedure Analysis on Rough Road

本文建立了一套汽车垂向—纵向系统动力学模型,模拟分析了汽车在不平道路上的制动过程。研究表明,路面不平度使制动过程中的车轮轮荷既有增大,亦有减小,从而整体上对制动距离无显著影响,但是,路面的不平激发的车轮圆周切向速度变化,会增加车轮的瞬时抱死程度,降低车辆制动稳定性,并干扰防抱制动装置的正常工作。

Vehicle braking procedure on rough road-surface is simulated and analyzed. Road-surface roughness makes wheel load increase or decrease during braking procedure. Rough road-surface excites the wheel tangential velocity changed, increases wheel instantaneous locked function, decreases braking stability and disturbs the operation of ABS.