Apparatus for controlling upshifts or downshifts as a function o

Details Apparatus for controlling upshifts or downshifts as a function o Apparatus for controlling upshifts or downshifts as a function o

1997-08-04

1999-09-14

Ta, Khoi Q.

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

477 45, 477905, F16H 900, F16H 6104

Patent

active

059514370

ABSTRACT:
The up-shift is discriminated to be in any one of a first up-shift mode in which the throttle opening degree remains nearly constant, a second up-shift mode accompanying the operation for nearly fully closing the throttle or a third up-shift mode accompanying the operation for closing the throttle to a half opened state. On the other hand, the down-shift is discriminated to be either in a first down-shift mode which accompanies the operation for opening the throttle or in a second down-shift mode accompanying the decrease in the vehicle speed. The rate of changing the speed is set for each of the speed change modes, and the speed change ratio of the continuously variable transmission is so controlled that the actual speed change ratio is gradually brought to the basic speed change ratio based upon said rate of changing the speed.

REFERENCES:
patent: 4536171 (1985-08-01), Tanaka et al.
patent: 4589302 (1986-05-01), Oda et al.
patent: 4603602 (1986-08-01), Tanaka et al.
patent: 4850935 (1989-07-01), Morimoto
patent: 4867732 (1989-09-01), Soga et al.
patent: 5514051 (1996-05-01), Heid et al.
patent: 5607373 (1997-03-01), Ochiai et al.
patent: 5695428 (1997-12-01), Yuasa et al.
patent: 5790968 (1998-08-01), Kashiwabara et al.
patent: 5803862 (1998-09-01), Ochiai et al.

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