News 2005

The common hybrid powertrain concepts for passenger cars consist of a combination of a combustion engine with one (or more) electric motors which are connected to particularly complex and expensive transmission structures. Therefore, the hybrid transmission is the central element which combines various powertrain components and controls different driving strategies.

To obtain an optimal power transfer from the transmission during performance via an electric motor or in combination with a combustion engine, the power loss of the trans-mitting hybrid transmission must be held low. The efficiency of the mechanical transmis-sion is of crucial importance for the maximum recovery of the braking energy, as well as it dual acts on the efficiency of the powertrain. It is necessary to eliminate the disadvantages of current hybrid vehicles with regard to the total efficiency and to present better concepts to improve powertrain structures.

The cone ring transmission (CRT) developed by GIF offers, as hybrid powertrain in com-bination with a combustion engine and an electric motor, the same advantages in terms of efficiency, required space, weight and costs as already proven by conventional power-trains with CRT. First calculations have shown that this new hybrid powertrain concept results in a high potential of fuel consumption savings and emission reductions while driving dynamics, compared to common hybrid powertrains, are enhanced. This is achieved by a better total efficiency of the CRT (especially during part throttle).

The layout of this new hybrid powertrain will be shown on December 6, 2005 at 6.20 pm at the CTI-Symposium in Berlin. In addition, its advantages in terms of driving dynamics and energy consumption compared to concepts which have been renowned so far will be described.

You will find further information on the following website: http://www.transmission-symposium.com/int/index.htm.