Concept and potential of "CVT-hybrid-driveline"

This report results in the transfer of the findings from the research project "Sonderforschungsbereich 365 - Environment-friendly Automotive Drive Engineering" to the succeeding project "Optimized Drivetrain" (Transferbereich 38 of the DFG). The latter is a close-to-production hybrid drivetrain being developed and designed in close collaboration with the industry. The main conceptual differences to the "Autarc Hybrid" (which emanated from SFB 365) are a simplified continuously variable transmission (the so called i√i transmission), the use of ultra-capacitors for energy and power storage instead of a heavy battery as well as an optimized total vehicle control system. The concept is presented and explained in this document. Results from simulating the performance of the drivetrain under varying operating conditions are reported.