Continuously variable vehicle transmission
AssigneeDaimlerChrysler AG
InventorsAxel Geiberger, Steffen Henzler, Juergen Schweitzer
Life of this patent
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Abstract
A transmission for a motor vehicle, such as a motor vehicle EVT, is configures so that the number of teeth of the first planet gear of the epicycloidal gear train, operatively connected to the output toroidal disks by the first sun gear, and of an output element of the epicycloidal gear train form a ratio not equal to one. The transmission ratio of the toroid variator can be varied in such a way, and the number of teeth of the first planet gear of the epicycloidal gear train and of an output element of the epicycloidal gear train are configured in such a way that an output shaft speed approximating zero can be selected according to the variator.
Claims29
A transmission for a motor vehicle, comprising:
- a drive shaft, an output shaft arranged coaxially with the drive shaft with a continuously adjustable variator which has two drive toroidal disks rotating together and two output toroidal disks rotating together, and a drivetrain with an epicycloidal gear train having at least two gears, one being at least one first sun gear and another being at least one planet gear supported by at least one planet carrier, the drive toroidal disks or the output toroidal disks being torsionally fixed or connectable to the first sun gear of the epicycloidal gear train, and the disks that are unconnected to the first sun gear being torsionally fixed or connected by the at least one planet carrier of the epicycloidal gear train, wherein a second of the at least one planet gear moved by or with a first of the at least one planet gear has a diameter such that for a transmission ratio of the variator at an operating point thereof the contact point of the second planet gear with an output element of the epicycloidal gear train corresponds to the instantaneous center of the second planet gear.
Dependencies are inferred from the claim text.