CRITERIA AND SOLUTIONS FOR AUTOMATED TRANSMISSIONS IN COMMERCIAL VEHICLES TO MEET FUTURE MOBILITY NEEDS

摘要

ZF has more than 10 years of production experience with fully automatic two-pedal manual transmissions (AMTs) with their second generation for commercial vehicles. Requirements have risen significantly in this decade. Torques arc higher both in the traction and in the coasting mode. Temperatures, service life and noise requirements, arc more demanding now. The AMTs play an important role in the electronic vehicle system network communication with engine and braking systems as well as retarders and PTOs.Today, drivers have many tasks relating to traffic. Now, they can fully concentrate on the road thanks to the use of such AMTs. These systems automatically select the best gear for lowest fuel consumption and good driveability. Also the setting off, maneuvering, and shifting comfort was further improved. Life cycle costs arc being minimized, not only by lower fuel consumption but also by a much longer clutch life and significantly longer oil change intervals.Processes, requirements, and the experience gained to achieve a high-quality, robust, and reliable unit arc shown. The most important trends and improvements for the mid- and long-term further development and supplements of this transmission design arc described. These are primarily complements generated through hybrid modules. Considerations relating to successful global engineering provide the perfect edge to the contribution as such.