| 摘要 |
A transmission includes a hydrodynamic transmission, such as a torque convertor or a fluid coupling, connectable to a drive source and driving an infinitely variable V-belt transmission having primary and secondary pulleys each constructed of two conical pulley discs. The drive ratio of the V-belt transmission is controlled by a pressure cylinder which adjusts the axial position of one of the pulley discs, and the hydrodynamic transmission is lockable in a direct drive mode in response to the pressure in the pressure cylinder.
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