CVT hydraulic start clutch

Details CVT hydraulic start clutch CVT hydraulic start clutch

1989-10-11

1991-03-05

Lorence, Richard

192 clutches and power-stop control

Clutches

Axially engaging

192 357, 192 85AA, 192113B, 267161, F16D 250635, F16D 1372

Patent

active

049970747

ABSTRACT:
A hydraulically-actuated starting clutch for a continuously variable transsion which is designed to reduce the centrifugal torque of the clutch with respect to the chain belt/sheave torque. This is accomplished by adjusting the diameters of the clutch piston to reduce the resultant clutch torque to a value lower than the chain belt/sheave torque. A pair of oil feed passages are positioned in the clutch assembly to feed oil through openings in the friction plate at all times during operation, even when rotation of the friction plate ceases. Further, an improved retractor spring is utilized in the clutch assembly with circumferentially extending tabs on its inner periphery which extend over the snap ring holding the spring onto the actuating piston to prevent release of the snap ring due to centrifugal force during operation of the clutch.

REFERENCES:
patent: 3259383 (1966-07-01), Johnson et al.
patent: 3366210 (1968-01-01), Webster
patent: 4315565 (1982-02-01), Low
patent: 4520912 (1985-06-01), Ferris et al.
patent: 4606446 (1986-08-01), Watanabe
patent: 4624349 (1986-11-01), Watanabe
patent: 4699259 (1987-10-01), McColl
patent: 4706789 (1987-11-01), McColl et al.
patent: 4709795 (1987-12-01), Ferris
patent: 4856635 (1989-08-01), Vlamakis

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