Automatic transmission system and method for controlling...

Details Automatic transmission system and method for controlling... Automatic transmission system and method for controlling...

2005-03-29

2005-03-29

Lewis, Tisha D. (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S156000

Reexamination Certificate

active

06872166

ABSTRACT:
An automatic transmission system for a vehicle includes a rotational speed detector for detecting a variation of a rotation number of driving torque transmitting member when a friction engagement element, which has been disengaged based upon oil pressure controlled by a control unit, a side of which has been transmitted with the rotation of the driving torque transmitting member, and the other side of which is locked not to be rotated during the vehicle at a stationary condition, is controlled to be engaged, wherein an oil pressure characteristic value of the friction engagement element is learned by the control unit based upon the variation of the rotation number of the driving torque transmitting member when the friction engagement element is initially engaged.

REFERENCES:
patent: 5813943 (1998-09-01), Kousaka et al.
patent: 5846163 (1998-12-01), Kimura et al.
patent: 5848951 (1998-12-01), Lee
patent: 5911647 (1999-06-01), Kozaki et al.
patent: 6102830 (2000-08-01), Tsutsui et al.
patent: 07-272212 (1995-01-01), None
patent: 1148553 (1999-06-01), None

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