Hydraulic system for a CVT-transmission of a vehicle

Details Hydraulic system for a CVT-transmission of a vehicle Hydraulic system for a CVT-transmission of a vehicle

2006-04-18

2006-04-18

Fenstermacher, David (Department: 3682)

Endless belt power transmission systems or components

Pulley with belt-receiving groove formed by drive faces on...

Fluid pressure actuator for adjustment of member

C474S018000

Reexamination Certificate

active

07029409

ABSTRACT:
A hydraulic system of a CVT transmission of a motor vehicle is proposed, which has an oil pump for conveying oil from an oil sump to a variator comprising a first pulley set and a second pulley set. In each case, a valve mechanism is provided for controlling a pressure acting on the pulley set concerned. Between the valve mechanisms associated with the respective pulley sets is arranged a pressure selector valve, whose position determines which of the the valve mechanisms controls a main pressure to be delivered by the oil pump.

REFERENCES:
patent: 6299564 (2001-10-01), Gessler et al.
patent: 6336880 (2002-01-01), Agner
patent: 6350215 (2002-02-01), Gierling
patent: 199 04 593 (2000-08-01), None
patent: 199 06 558 (2000-09-01), None
patent: 199 34 598 (2001-02-01), None
patent: 0 228 817 (1990-06-01), None

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