Method for shifting an automatic transmission
AssigneeVoith Patent GmbH
InventorJörg Busch
Life of this patent
Estimating the term…
Abstract
A method for shifting an automatic transmission, including a drive region, a hydrodynamic converter, an output region, and exactly one planetary gear that acts in a first operating state and a second operating state. In order to shift to different gears of the automatic transmission, different transmission ratios are set in the strictly mechanical power branch by disengaging and engaging clutches and/or brakes in the drive region. The planetary gear set in the output region in the case of at least two different transmission ratios in the strictly mechanical power branch, the rotational movement transmitted by the strictly mechanical power branch is stepped up, in order to always set additional gears.
Claims8
A method for shifting an automatic transmission, comprising:
- providing the automatic transmission with a drive region, a hydrodynamic converter, an output region, at least one of clutches and brakes in the drive region, and exactly one planetary gear set in the output region, the planetary gear set acts in a first operating state as a summation gearbox for simultaneous parallel drive power transmission via the hydrodynamic converter in a hydrodynamic power branch and around the hydrodynamic converter in a strictly mechanical power branch and in a second operating state to step up a rotational movement transmitted via the strictly mechanical power branch;
- setting different transmission ratios in the strictly mechanical power branch by disengaging and engaging at least one of the clutches and the brakes in the drive region in order to shift to different gears of the automatic transmission;
- and
- stepping up, by the planetary gear set, the rotational movement transmitted via the strictly mechanical power branch in at least two different transmission ratios in the strictly mechanical power branch for setting additional gears relative to the gears of the automatic transmission.
Dependencies are inferred from the claim text.