Gearshift pressure controller using torque ratio of oncoming/off

Interrelated power delivery controls – including engine control – Transmission control – Transmission controlled by engine

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Details

477143, 477110, F16H 6106, F16H 5914

Patent

active

059679425

ABSTRACT:
A gearshift controller for an automatic transmission comprises an input shaft torque estimating portion for estimating the input shaft torque, a torque dividing ratio setting portion for setting the torque dividing ratio for each friction member of each gear range, and a desired torque calculating portion for calculating the desired torque of each friction member on the basis of the input shaft torque and the torque dividing ratio, and a desired hydraulic fluid calculating portion for calculating the desired hydraulic fluid pressure for each friction member on the basis of the desired torque of the each friction member, and a hydraulic fluid controlling portion for providing the desired hydraulic fluid pressure to each friction member.

REFERENCES:
patent: 5776030 (1998-07-01), Minowa et al.
patent: 5792021 (1998-08-01), Minowa et al.
patent: 5888171 (1999-03-01), Sasaki et al.

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