New Generation of AutomaticTransmissions at ZF

Authors

Dr.-Ing. G. Wagner, Dr.-Ing. H. Naunheimer, Dipl.-Ing.(BA) H. Scherer, Dr.-Ing. A. Dick, ZF Getriebe GmbH, Friedrichshafen

Year

2007

Print Info

Fortschritt-Berichte VDI, Reihe 12, Nr. 639

Summary

After the introduction of the ZF 6-speed automatic transmission family in 2001, a technically revised version of this range of transmissions was launched in 2006. The revamped variants boast significantly improved customer-specific features, such as better fuel efficiency, sportier shifting, and a better power-to-weight ratio. With regard to more stringent fuel efficiency and emission requirements, however, there are limits to this Lepelletierbased system, and its further development does not yield enough benefits. In an extensive synthesis, gear sets were therefore combined to create a new system offering the best conditions for an efficient power flow.

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