Control system for a continuously variable transmission

Details Control system for a continuously variable transmission Control system for a continuously variable transmission

1986-11-21

1987-11-03

Novosad, Stephen J.

Endless belt power transmission systems or components

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

Fluid pressure actuator for adjustment of member

F16H 1104

Patent

active

047040971

ABSTRACT:
A control system for a continuously variable belt-drive transmission which has a drive pulley having a hydraulically shiftable disc and a servo chamber for shifting the disc, a driven pulley having a hydraulically shiftable disc and a servo chamber for shifting the disc, and a belt engaged with both the pulleys. A hydraulic control circuit is provided for supplying oil to the servo chambers and for draining the servo chambers. A supplementary oil circuit is provided in the hydraulic control circuit for supplying supplementary oil to the servo chamber of the drive pulley, thereby filling the servo chamber with the oil before the starting of transmission operation.

REFERENCES:
patent: 4152947 (1979-05-01), van Deursen et al.
patent: 4400164 (1983-08-01), Cadee
patent: 4534243 (1985-08-01), Yokoyama et al.
patent: 4543077 (1985-09-01), Yamamuro et al.
patent: 4601681 (1986-07-01), Costelli et al.
patent: 4619157 (1986-10-01), Sakai
patent: 4627313 (1986-12-01), Sakai
patent: 4628773 (1986-12-01), Itoh et al.

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