Shift control apparatus for automatic transmission

Details Shift control apparatus for automatic transmission Shift control apparatus for automatic transmission

1992-02-28

1993-08-17

Wright, Dirk

Machine element or mechanism

Rotary member or shaft indexing, e.g., tool or work turret

Preselected indexed position

475281, F16H 344

Patent

active

052358771

ABSTRACT:
A shift control apparatus for an automatic transmission including a gear train having a plurality of one-way clutches having their engagement states switched in accordance with torque applying directions and a plurality of frictional engagement units adapted to be engaged by oil pressures. The apparatus comprises a controller for engaging a first one of the frictional engagement units so as to maintain a predetermined gear stage after any of the one-way clutches has been engaged or released, if a predetermined condition is satisfied after the one-way clutch has been engaged or released to start a shift to the predetermined gear stage.

REFERENCES:
patent: 4872376 (1989-10-01), Asada et al.
patent: 4944719 (1990-07-01), Takahashi et al.
patent: 4982624 (1991-01-01), Takada et al.
patent: 5010787 (1991-04-01), Takada et al.
patent: 5033331 (1991-07-01), Takada et al.
patent: 5088354 (1992-02-01), Asada
patent: 5097723 (1992-03-01), Hayasaki
patent: 5097726 (1992-03-01), Asada
patent: 5099718 (1992-03-01), Asada et al.
patent: 5113722 (1992-05-01), Iizuka

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