Engagement modulator for torque converter bypass

Details Engagement modulator for torque converter bypass Engagement modulator for torque converter bypass

1982-07-13

1984-09-25

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 88A, 192109F, F16D 3300

Patent

active

044731450

ABSTRACT:
A viscous coupling adapted to be positioned within the housing of a torque converter automatic transmission for use as a bypass of the torque converter and including an annular clutch lining secured to a side face of the outer peripheral portion of the coupling and a control valve assembly positioned in the outer peripheral portion to cushion the impact of engagement of the annular clutch lining with the confronting surface of the torque converter housing. The control valve assembly includes a rolling diaphragm which extends across the open end of an axially extending bore in the outer peripheral portion and is arranged to rollingly traverse the bore to successively cover or uncover a series of axially spaced leakage holes communicating with the main chamber of the torque converter and the bore. The end of the bore remote from the diaphragm communicates with the side of the coupling carrying the annular clutch lining at a location radially inwardly of the clutch lining so that, upon initial engagement of the coupling, leakage flow may occur through the leakage holes from the main chamber of the torque converter to the other side of the coupling to cushion the impact of the clutching engagement and the leakage flow is thereafter gradually cut off to apply the full clutch force as the rolling diaphragm traverses the bore to successively cover the leakage holes.

REFERENCES:
patent: 2736412 (1956-02-01), Livezey
patent: 3151717 (1964-10-01), Kaptur et al.
patent: 3213983 (1965-10-01), Smirl et al.
patent: 3384209 (1968-05-01), Murphy
patent: 3516524 (1970-05-01), Kelty et al.
patent: 3693478 (1972-09-01), Malloy
patent: 3949847 (1976-04-01), Hoehn
patent: 3966032 (1976-06-01), Koivunen
patent: 3972397 (1976-08-01), Cheek
patent: 4167993 (1979-09-01), Vukovich et al.
patent: 4181203 (1980-01-01), Malloy
patent: 4317510 (1982-03-01), Staub

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