Shift control apparatus and method for belt type...

Details Shift control apparatus and method for belt type... Shift control apparatus and method for belt type...

2005-03-14

2008-03-04

Estremsky, Sherry (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

Reexamination Certificate

active

07338406

ABSTRACT:
In shift control apparatus and method for a belt-type continuously variable transmission, a shift ratio between the primary pulley and the secondary pulley is controlled, a shift speed is detected, the shift speed being a variation quantity of the shift ratio per unit of time; and an advance of the shift ratio control is suppressed to suppress the shift speed when a magnitude of the shift speed is equal to or larger than a predetermined value and a suppression quantity is set to suppress the advance of the shift ratio control so as to suppress the shift speed.

REFERENCES:
patent: 4747325 (1988-05-01), Morimoto
patent: 5020392 (1991-06-01), Morimoto
patent: 5607373 (1997-03-01), Ochiai et al.
patent: 5790968 (1998-08-01), Kashiwabara et al.
patent: 5951437 (1999-09-01), Yuasa et al.
patent: 2001-304389 (2001-10-01), None

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