Continuously variable V-belt transmission

Details Continuously variable V-belt transmission Continuously variable V-belt transmission

2007-02-22

2010-02-02

Siconolfi, Robert A (Department: 3657)

Endless belt power transmission systems or components

Friction drive pulley or guide roll

Pulley or guide roll including circumferential...

C474S008000, C474S028000, C477S043000

Reexamination Certificate

active

07654926

ABSTRACT:
A continuously variable V-belt transmission basically has a driving pulley, a driven pulley and a V-belt wound around the pulleys. The frictional engagement between the pulleys and the V-belt is controlled by regulating pulley axial thrusts to the pulleys. The V-belt has a plurality of torque transmitting connected by an annular ring. A boundary-detection arrangement is provided to detect a boundary position between a first region, in which the elements are arranged without any gap therebetween, and a second region, in which the elements are arranged with a gap therebetween, along a portion of the driving pulley when torque is being transmitted. The detected boundary position is used to estimate the pulley axial thrust applied by the driving pulley against the V-belt, and to control the pulley axial thrust to a lower limit which ensures that the V-belt will not slip upon application of the maximum torque.

REFERENCES:
patent: 4534748 (1985-08-01), Stieg et al.
patent: 5427579 (1995-06-01), Kanehara et al.
patent: 6135915 (2000-10-01), Aoki et al.
patent: 6568280 (2003-05-01), Park et al.
patent: 7261672 (2007-08-01), Frank et al.
patent: 1158210 (2001-11-01), None
patent: 1333198 (2003-08-01), None
patent: 2000-018347 (2000-01-01), None

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