Hydraulic control system for a continuously variable transmissio

Details Hydraulic control system for a continuously variable transmissio Hydraulic control system for a continuously variable transmissio

1992-05-20

1993-12-28

Braun, Leslie A.

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Including lubrication or particular guide or bearing for...

74467, 474 28, F16H 5556, F16H 5704

Patent

active

052734927

ABSTRACT:
A high pressure circuit is connected between a secondary pressure control valve and a lockup clutch control valve for actuating a lockup clutch of a torque converter. A low pressure circuit is connected between the lockup clutch control valve and a continuously variable transmission. A high relief valve is provided in the high pressure circuit for controlling the lockup clutch with high pressure. A low relief valve is provided in the low pressure circuit for lubricating a transmission belt so as to improve cooling efficiency.

REFERENCES:
patent: 4466312 (1984-08-01), Oguma
patent: 4543077 (1985-09-01), Yamamuro et al.
patent: 4669336 (1987-06-01), Okada et al.
patent: 4718308 (1988-01-01), Haley
patent: 4846765 (1989-06-01), Sakai
patent: 4967621 (1990-11-01), Soga et al.
patent: 5012696 (1991-05-01), Miyawaki

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