Anti-lock braking system based on FlexRay protocol
The anti-lock braking system is nowadays a part of almost every vehicle. This system increases safety of the people sitting in the vehicle at the moment of stopping on a slippery or unstable road surface. The point is to assure a good controllability of the vehicle even if the wheels are in slip. In order to work properly, the anti-lock braking system needs to have actual information about the rotation of every single wheel. And the up-to-dateness and certainty of an accurate information is the primary criterion of an appropriate performance. Currently, the information about the frequency of wheel rotation is being transmitted via the current loop. This solution needs a lot of wiring, which means increased purchase costs. This paper describes a method, where the information from the rotation sensors of the wheels are transmitted into the control unit through the FlexRay bus. Additional wireless acceleration sensors located on the wheel are used to improve the ABS performance.
Global Chassis Control: Integration Synergy of Brake and Suspension Control for Active Safety
The paper deals with the investigation of integration synergy of brake and suspension control for reduction of the stopping distance. The basic idea is to take a controllable suspension and to optimize it for decrease of road-tyre force fluctuation. A nonlinear suspension control is proposed for this task. The outlined concept is implemented in a multibody simulation environment and simulation experiments verify its contribution.
Prototype Implementation of Semi-Active Road-Friendly Truck Suspensions
The paper deals with the description of realised implementations of semi-active road-friendly truck suspensions and with the description of provided experiments. The possible consequences in form of economical feasibility of serial practical implementations are included. There have been materialised two implementations. The first one was within the EU funded Copernicus project SADTS - Semi-Active Damping of Truck Suspsension and Its Influence on Driver and Road Loads  in 1997-98. The second one was within the mutual workshop of IKA RWTH, DLR, CTU  Moderne Nutzfahrzeug-Fahrwerke, Potential zur Ladegut- und Fahrbahnschonung  in Aachen in March 2000. the first implementation was on the SKODA-LIAZ platform truck and the second one was on the MAN truck-tractor with semi-trailer. Both implementations have again proved that the semi-active suspension is capable to decrease the dynamic part of road-tyre forces and to reduce road damage. The semi-active road-friendly suspension can serve for the reduction of road damage or for the allowed increase of useful truck payload. The economical feasibility of both variants is shortly provided.