Shift control apparatus of automatic transmission

Details Shift control apparatus of automatic transmission Shift control apparatus of automatic transmission

2011-03-29

2011-03-29

Pang, Roger (Department: 3655)

Interrelated power delivery controls, including engine control

Transmission control

Transmission controlled by engine

C477S133000, C477S136000, C477S144000, C477S154000

Reexamination Certificate

active

07914417

ABSTRACT:
A shift control method and apparatus of an automatic transmission for controlling a shift from one speed, achieved by engagement of a first and a second frictional element, to another speed, achieved by engagement of a third and a fourth frictional element. The method includes detecting a rotation speed of a turbine, detecting a rotation speed of at least one operating member of at least one planetary gear set of the automatic transmission, and controlling the shift according to the rotation speeds of the turbine and the operating member. The control includes overlapping a first shift, from the one speed to an additional speed, with a second shift, from the additional speed to the other speed. The additional speed has a gear ratio that is near a gear ratio of the one speed.

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patent: 1020030010543 (2003-02-01), None

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