| 摘要 |
Continuously variable transmission comprising pulleys with at least one axially moveable sheave, the movement of which is realised by controlling a hydraulic pressure in the pressure chambers (C1, C2) associated with such moveable sheaves (3), and control means (V2) for effecting the control of said hydraulic pressures. A first pump (PA) feeds a closable hydraulic circuit of the transmission having a controllable discharge pressure. The closable circuit includes the pressure chambers (C1, C2) as well as a second pump (PB), and further includes a shift valve (V1), by means of which a discharge side of the second pump (PB) may be selectively connected to either one or both of said pressure chambers (C1, C2), whereby a suction side of the second pump (PB) respectively is connected either to the respective other pressure chamber (C1, C2) or also to both said pressure chambers (C1, C2). <IMAGE>
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