Method and system for controlling rate of change of ratio in...

Details Method and system for controlling rate of change of ratio in... Method and system for controlling rate of change of ratio in...

2007-08-28

2007-08-28

Lewis, Tisha (Department: 3681)

Interrelated power delivery controls, including engine control

Transmission control

Continuously variable friction transmission

C477S050000, C701S056000

Reexamination Certificate

active

10804814

ABSTRACT:
Systems and methods for efficiently and effectively controlling the rate of change of ratio, not simply the ratio, in a CVT. By controlling the rate of change of ratio, the acceleration or deceleration of a vehicle can be controlled in an efficient manner. Furthermore, the rate of change of ratio can be controlled by controlling the clamping pressure of the pulleys and/or differential pressure between the pulleys with minimal slip by using a servo control mechanism adapted for control by a system controller based on equilibrium mapping and other control parameters.

REFERENCES:
patent: 4565110 (1986-01-01), Ito
patent: 4584907 (1986-04-01), Niwa et al.
patent: 4790216 (1988-12-01), Eggert et al.
patent: 5201687 (1993-04-01), Friedmann
patent: 5842534 (1998-12-01), Frank
patent: 6054844 (2000-04-01), Frank
patent: 6243638 (2001-06-01), Abo et al.
patent: 6459978 (2002-10-01), Taniguchi et al.
patent: WO 0120198 (2001-03-01), None

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