Voith to present transmission breakthrough at IAA

VOITH will be providing a glimpse into the next generation of its DIWA automatic transmission at IAA Commercial Vehicles 2016. The focus areas of the study are the integration of a central recovery unit, an extra gear and the separation of the torque converter and retarder.
The concept is based on the differential converter principle, which has proven itself in use through even starting and acceleration with few gear shifts. In order to make the best use of the location between the engine and transmission, Voith is planning to add a central recovery unit to the DIWA in the future. The compact 48 V electric motor requires almost no additional installation space and is integrated around the vibration damper. As a result, the powertrain remains compact and does not need any added systems that have to be connected via a belt drive, for example.
With the central recovery unit, Voith is redefining the role of the transmission in the overall system of the bus. Consequently, the DIWA will not just control and transmit the drive torque in future. The partial-hybrid system will also provide support for the combustion engine during demanding route sections and supply power to additional components such as the air-conditioning system through the vehicle power system. As the 48 V technology is not a high voltage technology, workshop personnel can perform all maintenance operations on the transmission without undergoing additional training as electricians.
The additional technical details of the concept include the higher ratio spread coming from an additional gear (5th gear). In addition, Voith plans to separate the DIWA’s torque converter and retarder to optimise the differential converter with regard to its traction function. However, both components continue to use a common oil circuit and heat exchanger.

Archive 2019

August
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