Belt-type continuously variable transmission

Details Belt-type continuously variable transmission Belt-type continuously variable transmission

1996-08-30

1998-07-07

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 44, 475208, 474 28, F16H 900

Patent

active

057760284

ABSTRACT:
A belt-type continuously variable transmission has a pulley side pressure control valve for controlling side pressures of driving and driven pulleys and a controller for controlling the pulley side pressure control valve. The controller has a correcting device for correcting a belt transmission torque calculated by a belt transmission torque calculator when the polarity of the belt transmission torque changes. The correcting device adds to the belt transmission torque for a predetermined time a correction value corresponding to a peak torque of the belt transmission torque arising at times of throttle opening and closing. That is, because the belt transmission torque is corrected in correspondence with the peak torque arising at times of throttle opening and closing, the side pressures of the pulleys are kept at suitable values at all times and slippage of the metal V-belt is prevented.

REFERENCES:
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patent: 4752277 (1988-06-01), Morimoto
patent: 4781655 (1988-11-01), Tezuka
patent: 4841814 (1989-06-01), Satoh
patent: 4843918 (1989-07-01), Morimoto
patent: 4893526 (1990-01-01), Tokoro
patent: 4923433 (1990-05-01), Tanaka et al.
patent: 5042325 (1991-08-01), Sawasaki et al.
patent: 5218541 (1993-06-01), Sakakibara et al.
patent: 5259272 (1993-11-01), Yamamoto et al.
patent: 5305662 (1994-04-01), Togai et al.
patent: 5364321 (1994-11-01), Togai et al.
patent: 5382205 (1995-01-01), Togai et al.
patent: 5569114 (1996-10-01), Matsuda et al.

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