Control for steplessly variable transmission

Machine element or mechanism – Rotary member or shaft indexing – e.g. – tool or work turret – Preselected indexed position

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Details

74865, 474 18, B60K 4114

Patent

active

046711406

ABSTRACT:
A belt type steplessly variable transmission includes a belt-pulley device of variable speed ratio and a fluid pressure operated actuator for changing the speed ratio of the belt-pulley device. A fluid control valve is provided for controlling a supply of fluid pressure to the actuator to thereby determine the speed ratio of the belt-pulley device. The fluid control valve is associated including with a manually operable member movable between a first position in which it does not affect operation of the fluid control valve and a second position in which the supply of fluid pressure is changed so that a change in the speed ratio does not take place until input speed to the belt-pulley device exceeds a predetermined value. A manually operable valve is provided for changing the supply of fluid pressure so that the speed ratio of the belt-pulley means is increased.

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