Shift control system and method for automatic transmission of ve

Details Shift control system and method for automatic transmission of ve Shift control system and method for automatic transmission of ve

1991-02-14

1992-07-28

Bonck, Rodney H.

Machine element or mechanism

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

Preselected indexed position

74867, 3644241, B60K 4118

Patent

active

051332299

ABSTRACT:
A shift control system for use in an automatic transmission having a gear train to be set to a plurality of gear stages of different gear ratios in accordance with the engagement/release states of a plurality of fricitional engagement devices. The gear train is enabled to set a predetermined gear stage in accordance with plural kinds of combination of the engagement/release of the frictional engagement devices. The shift control system comprises: an input torque detector for detecting input torque to be inputted to the gear train; a torque evaluator for evaluating the level of the input torque; and an engagement/release pattern selector for selecting the combination of engagement/release of the frictional engagement devices for setting the predetermined gear stage, on the basis of the result of the input torque evaluated by the torque evaluator.

REFERENCES:
patent: 4928557 (1990-05-01), Takada et al.
patent: 4953091 (1990-08-01), Baltusis et al.
patent: 5010787 (1991-04-01), Takada et al.
patent: 5012698 (1991-05-01), Hayasaki
patent: 5033330 (1991-07-01), Okahara

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