Device for controlling an automatic transmission

Details Device for controlling an automatic transmission Device for controlling an automatic transmission

2004-05-07

2008-03-04

Ho, Ha D. (Department: 3681)

Planetary gear transmission systems or components

Fluid drive or control of planetary gearing

Fluid controlled mechanical clutch or brake

C475S127000, C475S134000

Reexamination Certificate

active

07338402

ABSTRACT:
A device for the hydraulic control of an automatic transmission, especially a continuously variable automatic transmission. The control system comprises a forward/reverse drive unit (4), which is controlled by way of at least a first and a second shifting component (5, 6). The shifting components (5, 6) are in turn controlled via at least two valves (7, 8, 17, 18, 20, 21), which are pressurized by way of a pressurized medium pump (9). A gear selector device (15) selection is made among at least a forward gear (D), a neutral gear (N) and a reverse gear (R), wherein the selector device (15) possesses a non-mechanical connection to the transmission control system.

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patent: 2003/0060313 (2003-03-01), Sommer et al.
patent: 101 46 962 (2003-04-01), None
patent: WO-97/37158 (1997-10-01), None

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