Viscous coupling by-pass element for a torque converter and impr

Details Viscous coupling by-pass element for a torque converter and impr Viscous coupling by-pass element for a torque converter and impr

1991-05-28

1992-02-11

Bonck, Rodney H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 58B, 192110B, 192113B, F16H 4502, F16D 1372, F16D 4702

Patent

active

050868934

ABSTRACT:
A viscous coupling (11) is provided for use as a by-pass element in a torque converter (T). The coupling includes a body member (13) having a body hub portion (25) and a cover member (15) having a cover hub portion (35). The body and cover hub portions are journalled on the outer surfaces (53,57) of a clutch hub portion (41) by means of a pair of identical bushing (59). Each bushing defines on its outer surface a fluid passage (79) including a restricted flow orifice (81). The restricted orifice results in a substantial pressure drop from a high pressure chamber (73) to a seal chamber (70). The cover hub portion (35) defines a counterbore (85) which communicates with the fluid passage (79) to by-pass the restricted orifice (81), such that the seal chamber (70) is maintained at substantially the pressure of a downstream, low pressure chamber (71).

REFERENCES:
patent: 4445599 (1984-05-01), Bopp
patent: 4462492 (1984-07-01), Mueller
patent: 4505365 (1985-03-01), Bopp

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