Abstract
As dynamic testing gets more importance for the development of powertrain systems all automotive companies try to save costs and development time, especially of test tracks. Up to now, transferring test from the test track to test beds (road to rig) leads to some compromises, as test beds are usually equipped with fly wheels or offer only stationary testing procedures. Additionally, important effects of the test track could not be reproduced on the rig, as one of the most important parts the tyre and the wheel / road contact - are neglected in current systems. This paper gives a comparison between current test bed solutions and measurement data of a real vehicle on a test track. Additionally, the improvements by including the wheel slip simulation into a 4 WD test bed are presented.