Twenty years of automotive wind tunnels at the institute for combustion engines and automotive engineering of Universität Stuttgart 1989–2009

The transmission becomes more important in terms of evaluating emissions, drivability and comfort. These developments have caused an increase in the complexity of the transmission control units of automatically shifting transmissions (automatic transmissions, dual-clutch transmissions and automated manual transmissions) for more than twenty years. Additionally, the increasing popularity of these transmission concepts in all markets leads to more vehicle-engine-transmission combinations which have to be calibrated. The growing effort also means that more personnel and longer calibration times are required, which thus results in higher development costs. The Institute of Automotive Engineering of the Technische Universitat Braunschweig (Germany) describes methods and tools to reduce the effort for TCU calibration in terms of shift comfort by means of efficient transmission calibration on a roller dynamometer.