Two-Drive-Transmission for Long Range

Transmission with form-locking dual clutch for hybrid variants of highly efficient multi-motor e-drive powertrains

Mechatronic Systems in Mechanical Engineering

Prof. Dr.-Ing. Stephan Rinderknecht

+49 6151 16-23250

Status quo

Hybrid electric powertrains are often expensive, complex and especially in pure electric operation not very efficient. This is caused by requirements on installation space, comfort and functionality. In addition, there is currently often a demand for synergies with conventional powertrains.

Our technology: TDT4LR

By consequently following the system integration approach, the TDT4LR offers an intelligent possibility for a parallel coupling of a combustion engine as a range extender for multi-motor e-drive powertrains with reduced costs and space requirements, but high driving comfort.


  • High functionality with low complexity
  • Highly efficient operation by eliminating powershift elements
  • Cost reduction potential due to synergies with e drive powertrain variants

Current stage of development

Technology-Readiness-Level (TRL): Level 3.

The invention bases on known technologies. Therefore, a short-term implementation in a demonstrator vehicle (TRL 6-7) is possible.

Application possibilities

A powertrain system for future-oriented vehicles which are suitable for long-distance operation: Drive both efficiently locally emission-free in pure electric mode and on longer distances in hybrid mode with minimal real ecological impact.

Commercialization opportunities

For the implementation of the technology, we are looking for interested companies who would like to extend their product portfolio or open up new business fields. There are various possibilities for cooperation between the industrial partner and TU Darmstadt: from an exchange with the know-how carriers of the technology up to a close cooperation in case of further development needs. The technology is protected by intellectual property rights and can be used by the industry partner after a sale or licensing agreement.