The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 2002
Filed:
Mar. 16, 1999
Ivo Agner, Bad Homburg, DE;
LuK Getriebe-Systeme GmbH, Buhl/Baden, DE;
Abstract
A torque sensor between a rotary input element driven by an engine and a coaxial output element connected to a continuously variable transmission in the power train of a motor vehicle has a plenum chamber for a supply of hydraulic fluid. The chamber is defined by two coaxial valve members of a pressure reducing valve. One valve member is connected to the output element and is movable axially relative to the other valve member, which rotates with the input element, to change the fluid pressure in the chamber. An inlet opening of the valve serves to connect the chamber with the outlet of a pump which supplies pressurized fluid, and such opening is at least partially exposed in at least one first and sealed in at least one second position of the one valve member. A first outlet opening of of the valve can be exposed or sealed by the one valve member to respectively permit and prevent the flow of fluid between the chamber and a sump, and a second outlet opening of the valve serves to permit the flow of fluid from the chamber to one or more cylinder-and-piston units which regulate the operation of the transmission.