Continuously variable transmission control method and apparatus

Details Continuously variable transmission control method and apparatus Continuously variable transmission control method and apparatus

1996-10-04

1998-03-24

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 45, 477904, F16H 5948

Patent

active

057306800

ABSTRACT:
A method and apparatus for controlling a continuously variable transmission having an input and output shaft for use with an automotive vehicle. The transmission is operable at a variable speed ratio for transmitting a drive from the input shaft to the output shaft. A target value for the speed of rotation of the input shaft of the transmission is calculated based on the sensed vehicle operating conditions including vehicle acceleration (deceleration). A correction factor per predetermined unit time is calculated based on the vehicle acceleration (deceleration) when the vehicle acceleration (deceleration) exceeds a threshold value with the accelerator pedal being released. The correction factor is used to correct the target input shaft speed value at intervals of the predetermined unit time. The speed ratio is controlled to bring the input shaft speed into coincidence with the corrected target value.

REFERENCES:
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patent: 4589071 (1986-05-01), Yamamuro et al.
patent: 4708031 (1987-11-01), Morimoto et al.
patent: 5012696 (1991-05-01), Miyawaki
patent: 5319999 (1994-06-01), Morishige et al.
patent: 5655995 (1997-08-01), Kondo et al.
patent: 5665021 (1997-09-01), Inoue

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