Hydraulic control apparatus for lock-up clutch assembled within

Details Hydraulic control apparatus for lock-up clutch assembled within Hydraulic control apparatus for lock-up clutch assembled within

1997-10-22

1999-08-10

Marmor, Charles A.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 331, 192 329, F16D 3300

Patent

active

059344270

ABSTRACT:
A hydraulic control apparatus for a lock-up clutch assembled within a torque converter, the lock-up clutch having an engagement-side fluid passage supplied with fluid under line pressure for engagement thereof to establish a direct connection between input and output elements of the torque converter and a release-side fluid passage supplied with the fluid under line pressure for disengagement thereof to release the direct connection between the input and output elements of torque converter. The hydraulic control apparatus includes a modulator vale arranged to modulate fluid under line pressure supplied from a hydraulic pump under control of a regulator valve for supplying fluid under modulated pressure to the release-side fluid passage of the lock-up clutch and a lock-up control valve arranged to connect the engagement-side fluid passage to an inlet fluid passage of a cooler for disengaging the lock-up clutch and to supply the fluid under line pressure to the engagement-side fluid passage for effecting engagement of the lock-up clutch in a condition where the release-side fluid passage is being supplied with the fluid under modulated pressure.

REFERENCES:
patent: 4998604 (1991-03-01), Vukovich et al.
patent: 5031480 (1991-07-01), Kuwayama
patent: 5339935 (1994-08-01), Ishii et al.
patent: 5527233 (1996-06-01), Tabata
patent: 5634865 (1997-06-01), Jang
Jidosha Gijyutsu Handbook, published by Jidosha Gijyutsu kai, Mar. 1, 1991, pp. 228-230.

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