Direct-coupling control system for fluid gear in automatic vehic

Details Direct-coupling control system for fluid gear in automatic vehic Direct-coupling control system for fluid gear in automatic vehic

1984-10-16

1987-03-17

Krizmanich, George H.

192 clutches and power-stop control

Vortex-flow drive and clutch

Including drive-lockup clutch

192 0076, 192109F, 74733, B60K 4102, F16H 4502

Patent

active

046500472

ABSTRACT:
A direct-coupling control system for a fluid gear in an automatic vehicular transmission, having a fluid gear provided with input and output members; a direct-coupling mechanism capable of connecting the input and output members of the fluid gear mechanically and directly by a locking force which is determined on the basis of a function of a difference between a working pressure and an internal pressure in the fluid gear; and a control valves provided between a pressure supply source and the direct-coupling mechanism and adapted to control the working pressure. The direct-coupling control system includes a pressure retainer valve for controlling the internal pressure in the fluid gear so as to reduce the same in accordance with an increase in a vehicle speed or an engine output.

REFERENCES:
patent: 2965202 (1955-12-01), Christenson
patent: 4253553 (1981-03-01), Yamada et al.
patent: 4457413 (1984-07-01), Hattori

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