Abstract
Abstract:
Today several manufacturers develop electronic steering system, so the electronic (electro hydraulic) steering will be introduced rather soon in commercial vehicles as well. A steering system without a direct mechanical link between the steering and steered wheels will provide further opportunities for the intelligent powertrain, which will intervene into the vehicle directional control. One of the straightforward applications is the combined action of the brake and steering system based vehicle dynamic control. Although the brake system based ESP has many benefits (precise control of individual wheel slips, reducing the kinetic energy of the vehicle by the braking, etc.), some improvement opportunities are still there, especially in the pre-ESP field, namely in the slip regions, where the brake systems based control still silent, but the vehicle behaviour clearly shows the necessity of intervention.
This paper focuses on the control algorithm, which is responsible for the intervention and also contains simulated test results showing the effect of the steering intervention on the ESP.