Dynamic and Stationary Testing of Vehicle Braking Systems

Abstract

Abstract The paper deals with the dynamic and stationary testing of vehicle braking systems for a selected set of eight intercity buses in an unloaded state. In case of the dynamic test carried out on a defined test area, a decelerometer is used to record the braking deceleration of a set of vehicles, which is placed in the vehicle during the course of test. According to the methodical procedure, the vehicle is accelerated to a speed of 40 km·h-1 and subsequently braked with the maximum braking deceleration. Braking deceleration values recorded by the decelerometer were used to calculate vehicle braking. During the stationary test, a roller brake tester was used, on which the maximum braking forces on the front and rear axles of the vehicle are measured, and then, the braking of the vehicle is calculated from these values according to the methodical procedure. The calculated braking values of vehicles during the dynamic and stationary test are subsequently compared, where it is possible to observe the percentage difference of these values, which may be caused by several factors taken into account in the results of the paper.