Variable flow rate torque converter lockup clutch

Details Variable flow rate torque converter lockup clutch Variable flow rate torque converter lockup clutch

1996-10-28

1998-10-13

Lorence, Richard M.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192107R, 19211336, 19211335, F16H 4502, F16D 1372

Patent

active

058198962

ABSTRACT:
A lockup clutch for a torque converter (10) has a piston (63) with a tapered face (67) that engages a grooved friction material (61). The edge (71) of the piston face (67) extends outward away from the center portion (69) of the piston face (67) toward the friction material (61). The friction material (61) is arranged in a pattern of concentric lands (80, 82, 84) defining annular grooves (86) between adjacent lands with an innermost land (82) being free of radial grooves (92) and all other lands being connected by radial grooves (92) in communication with the interior of the torque converter housing (12, 14) through the torus circuit cavity. The innermost land (82) blocks fluid flow from the torus flow circuit cavity when the piston (63) engages the disk (61) in a hard lockup condition but permits fluid flow during a soft lockup condition.

REFERENCES:
patent: 4995500 (1991-02-01), Payvar
patent: 5056631 (1991-10-01), Macdonald
patent: 5501309 (1996-03-01), Walth et al.
patent: 5566802 (1996-10-01), Kirkwood

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