| 摘要 |
<p>Continuously-variable hydromechanical parallel-type gear-box, in particular for motor vehicles with several shift ranges, in which the continuously variable adjustment of the gear-box is effected by a hydrostatic gear train (A, B). The gear-box is provided with a high power density, since it is possible to use relatively small hydrostatic units (A, B). A disconnect clutch is not required between the motor and gear train, since a continuously-variable adjustment is provided over the total speed range extending down to complete stoppage of the vehicle. A hydrostatic unit (A, B), a summarizing planetary gear train (4) and a further planetary drive (5) form the basic components of the gear-box. The drive shaft (2) is linked with the first hydrostatic unit (A) and with a component of the summarizing planetary gear train (4). The second hydrostatic unit (B) can be connected in an alternating manner, according to the range selected, with shaft of the summarizing planetary gear train (4). In the first range and reverse range the second hydrostatic unit (B) is in a separating relationship with the drive shaft (2) via a planetary gear train (5).</p> |
