Patent · US Active

Hydraulic arrangement for actuating a plurality of shift rails

US9038492B2 · kind B2 · utility

0Cited by

7References

10Claims

0Family size

Assignee

Schaeffler Technologies AG & Co. KG · DE

Inventors

Eric Muller · Contz-les-Bains, FR
Reinhard Stehr · Bogen, DE
Roshan Willeke · Karlsruhe, DE
Ronald Glas · Braunschweig, DE
Martin Staudinger · Ettlingen, DE
Marco Grethel · Frebershausen, DE

Key dates

Filing date	Apr 21, 2012
Grant date	May 26, 2015
Priority date	—
Expiry date	Dec 10, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T74/20024
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

A hydraulic arrangement by which a plurality of shift rails of a transmission are actuated, including one double acting cylinder per shift rail by which the respective shift rail can be moved back and forth. A first hydraulic valve is connected upstream of the plurality of shift rails and has a first output and a second output, by which a first shift pressure and a second shift pressure for actuating the shift rails can be provided. A second hydraulic valve is connected between the first hydraulic valve and two of the shift rails, and by which it is selectively possible for the first output of the first hydraulic valve to be associated with one of the double acting cylinders of the two shift rails, and the second output of the first hydraulic valve to be associated with the other double acting cylinder of the two shift rails.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.