Abstract Manual transmissions combine the advantages of lowest weight, highest efficiency and lowest cost compared with all other light vehicle transmission types. This is reflected in the market share and the expected total volume of manual transmissions in the global markets. However, the concept of a manually shifted transmission needs to be adapted to upcoming market requirements: the need to integrate hybrid features in the powertrains to meet future legislated emission limits tightened NOx and particulate emission limits in cities and potential restrictions for the use of Diesel powered vehicles in inner city districts need for compatibility of today’s manual transmissions with advanced driver assistance functions The GETRAG concept to address this challenge is based on a step-by-step upgrade of the transmission’s function, where each step is building on the previous and provides a functional enhancement on it’s own. All components and functions are fully integrated into the transmission in consideration of the installation package in the vehicle engine bay thus minimizing the complexity and specific effort to offer hybrid and conventional powertrains versions in the same vehicle. The GETRAG hybrid manual transmission (HMT) concept offers specific advantages for small and mid size powertrains as a cost efficient option to create mild hybrid variants on the base of a 48V electric system. By the use of a standardized GETRAG hybrid part kit shared with the GETRAG Hybrid DCT program (6HDT200 / 7HDT300) the cost are held low while technical and development risks are minimized. For vehicle assembly the integrated solution offers the benefit of a fully tested unit ready to be mounted into the vehicle. The modularity of the system enables upgrade opportunities to automated hybrid transmissions (AHT) and – package neutral - to high voltage hybrid units for PHEVs and therefore purely electric driving in restricted inner cities.
A modular concept for hybridized manual transmissions
2018-01-01
14 pages
Article/Chapter (Book)
Electronic Resource
English
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