Method and apparatus for controlling a continuously variable tra

Details Method and apparatus for controlling a continuously variable tra Method and apparatus for controlling a continuously variable tra

1995-09-05

1997-12-09

Marmor, Charles A.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 46, 474 18, B60K 4112, F16H 5900

Patent

active

056954280

ABSTRACT:
A basic speed change ratio is set on the basis of vehicle speed and throttle valve opening, and a control target speed change ratio is made to gradually approach the basic speed change ratio in accordance with a speed change speed. Feedback control is then carried out so that the actual speed change ratio coincides with the control target speed change ratio. When there is an up-shift requirement with a rate of change in throttle valve opening equal to or less than a predetermined value, and a rate of change in the basic speed change ratio, which is set on the basis of operating conditions, equal to or less than a predetermined value, the speed change speed is faster than at the time of an up-shift requirement with throttle valve closure.

REFERENCES:
patent: 4747325 (1988-05-01), Morimoto
patent: 4753133 (1988-06-01), Itoh et al.
patent: 4827803 (1989-05-01), Miyawaki
patent: 4831898 (1989-05-01), Miyawaki
patent: 5009129 (1991-04-01), Morimoto et al.

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