Endless belt power transmission systems or components – Pulley with belt-receiving groove formed by drive faces on... – Load responsive
Patent
1986-08-06
1988-06-28
Smith, Gary L.
Endless belt power transmission systems or components
Pulley with belt-receiving groove formed by drive faces on...
Load responsive
474 28, 74867, F16H 1106
Patent
active
047536276
ABSTRACT:
A hydraulic control system for a belt drive continuously-variable speed transmission comprising a continuously-variable speed transmission means including a primary variable-pitch pulley having a fixed pulley flange fixed to an input shaft and a movable pulley flange adapted to be axially slidable on said input shaft, a secondary variable-pitch pulley having a fixed pulley flange fixed to an output shaft and a movable pulley flange adapted to be axially slidable on said output shaft, and an endless belt interconnecting said primary and said secondary variable-pitch pulleys; and a hydraulic control circuit including hydraulic servomechanisms hydraulically interconnected with the respective movable pulley flanges of said primary and said secondary variable-pitch pulleys for pressing the corresponding movable pulley flanges toward the corresponding fixed pulley flanges, a regulator valve for supplying the pressurized working fluid of a controlled pressure to said hydraulic servomechanisms, and a control valve capable of generating a pressure signal to change the pressure of the working fluid. The control valve is incorporated into the output shaft and is adapted to generate a pressure signal corresponding to the axial movement of the movable pulley flange of the secondary variable-pitch pulley and to feed the pressure signal to the regulator valve, whereby a pressure factor corresponding to the speed-change ratio of the belt drive continuously-variable speed transmission means is added to the working fluid flowing the pressurized fluid passages of the hydraulic control circuit.
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Aisin Warner Kabushiki Kaisha
Kaplan Blum
McLindsey Rodney
Smith Gary L.
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