Torque converter viscous coupling bypass element with improved s

Details Torque converter viscous coupling bypass element with improved s Torque converter viscous coupling bypass element with improved s

1990-09-19

1991-09-03

Herrmann, Allan D.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 331, 192 333, 192 58B, 192 483, 1921062, F16D 3300

Patent

active

050444778

ABSTRACT:
A bypass element (27) for a torque converter (15) is provided in which the bypass element comprises a viscous coupling (29). The viscous coupling includes a housing assembly comprising a body member (35) and a cover member (37), defining a viscous chamber (39) therebetween. Disposed within the viscous chamber is a clutch assembly (41) including a clutch portion (61) and a hub portion (65). The body member includes a hub portion (47) on which are disposed bushings (85 and 87). The cover member includes a hub portion (59) on which is disposed a bushing (89). The hub portion defines annular seal chambers (101 and 103) which include O-ring seals (105 and 107) respectively. Disposed upstream of the upstream O-ring, the hub portion defines an annular leakage groove (113) and an axial passage (115), communicating from the leakage groove to a downstream chamber (109) adjacent the coupling. High pressure in an upstream chamber (111), which would act against the upstream O-ring, is relieved by the leakage groove and axial passage, and the resulting flow of automatic transmission fluid through the hub portion also serves to cool the viscous coupling.

REFERENCES:
patent: 4317510 (1982-03-01), Staub, Jr.
patent: 4423803 (1984-01-01), Malloy
patent: 4462492 (1984-07-01), Mueller
patent: 4466518 (1984-08-01), Mueller
patent: 4473145 (1984-09-01), Bopp
patent: 4493406 (1985-01-01), Bopp
patent: 4496034 (1985-01-01), Bopp
patent: 4505365 (1985-03-01), Bopp
patent: 4540076 (1985-09-01), Bopp

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