Abstract
Abstract
This paper describes modelling of dynamic behaviour of a vehicle suspension system subjected to the conditions of straight line nonstationary motion during the braking manoeuvre. The observed model assumed nonlinear characteristics of tyres, springs, shock absorbers and it concerned vehicles equipped with ABS feature, with nonlinear variation of braking pressure and braking torque, nonlinear road-tyre relation and stochastic excitation of road microprofile. The most important aspects of a subject described in this paper were the influence of ABS on the behaviour of suspension system during braking, the choice of parameters relevant for the model and determination of the influence of ABS on the vehicle behaviour. During the straight line braking, the pressure in braking installation shows the most important influence and through the pressure ABS is controls the relation between vehicle velocity and wheels velocity. For that reason, this work utilizes the experimentally gathered data on brake system pressure.Keywords: braking, suspension, nonlinearities