Abstract

The invention relates to a power-split transmission having at least one continuously variable mechanical variator (4). To achieve the power split, the variator (4) according to the invention comprises at least three shafts (1, 2, 3), two of the three shafts (1, 2, 3) being coupled via at least one transmission stage (5) at the input end or the output end. The invention also relates to a method for optimizing the efficiency of and/or the range of gear ratios in a power-split transmission.

IPC Classes  ?

• F16H 37/08 - Combinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with a plurality of driving or driven shaftsCombinations of mechanical gearings, not provided for in groups comprising essentially only toothed or friction gearings with arrangements for dividing torque between two or more intermediate shafts with differential gearing
• B62M 11/12 - Transmissions characterised by use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio with frictionally-engaging wheels
• F16H 15/52 - Gearings providing a continuous range of gear ratios in which a member of uniform effective diameter mounted on a shaft may co-operate with different parts of another member