Infinitely variable speed transmission with a variable diameter

Details Infinitely variable speed transmission with a variable diameter Infinitely variable speed transmission with a variable diameter

1988-12-13

1989-07-25

Bui, Thuy M.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Fluid pressure actuator for adjustment of member

74867, F16H 1102

Patent

active

048509388

ABSTRACT:
A motor vehicle transmission has a pulley system comprising a variable diameter drive pulley and a variable diameter driven pulley, with an endless belt extending around the pulleys to impart the rotation of a drive shaft to a driven shaft at a speed ratio determined by the relative effective diameters of the two pulleys. A substantially tubular shell has an enlarged end secured to the movable cone of the driven pulley and a constricted end loosely fitted over the driven shaft. Rigidly mounted on the driven shaft, a partition divides the interior of the shell into an actuating fluid chamber, to be supplied with pressurized fluid for controllably moving the movable cone towards and away from the fixed cone, and a counterbalance chamber. The driven shaft has formed therein a fluid passageway with an outlet disposed in such an axial position thereon that the constricted end of the shell directs the fluid issuing therefrom into the counterbalance chamber, in order to counterbalance the centrifugal force of the fluid in the actuating chamber, when the driven shaft is in rotation at relatively high speed. When the driven shaft speed is low, the constricted end of the shell directs the fluid to the exterior of the shell for lubricating some moving parts of the transmission.

REFERENCES:
patent: 4292031 (1981-09-01), Rattunde
patent: 4717368 (1988-01-01), Yamaguchi et al.
patent: 4753627 (1988-06-01), Kawamoto

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