Drive unit for a vehicle with a continuously variable transmission
US6592486B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2002 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Feb 5, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The drive assembly includes one or more motors (103, 104) driving at least a pair of continuously variable ratio transmission devices (101, 102) which each drive a driving wheel or driving axle of the vehicle. Each transmission device includes a planetary gear (3) whose reaction element, preferably the ring gear with an inner toothing, is connected to the rotor of a pump through which a hydraulic circuit passes provided with at least an adjustable valve (63) for adjusting the speed and/or the torque of the output shaft (27), in particular to facilitate the attainment of an operating speed for the motor when starting. The hydraulic circuits of the two transmission devices are interconnected by hydraulic lines (105, 107), which assures a differential effect between the two wheels concerned. One of these lines may include an adjustable valve (109) for limiting or blocking the differential effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.