Patent · US Active

Double-acting shift cylinder actuating assembly

US9797508B2 · kind B2 · utility

0Cited by

6References

9Claims

0Family size

Assignee

WABCO GmbH · DE

Inventors

Hansjörg Kraft · Hannover, DE
Reiner Krugener · Pattensen, DE
Ingo Meyer · Stolzenau, DE

Key dates

Filing date	Nov 28, 2012
Grant date	Oct 24, 2017
Priority date	—
Expiry date	Jul 11, 2033

Classification

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

Abstract

An assembly for actuating a double-acting shift cylinder of a shift assembly of an automatic transmission of a motor vehicle includes a hydraulic fluid reservoir having a motor-driven hydraulic pump and two control valves that are each connected to a pressure supply line of the hydraulic pump and to a return line to the hydraulic fluid reservoir. The shift cylinder has two pressure chambers that are each connected to one of the control valves. The control valves each connect one pressure chamber of the shift cylinder to the pressure supply line of the hydraulic pump or to the return line to the hydraulic fluid reservoir. The actuating assembly includes at least one pressure-limiting valve that connects the pressure supply line to the return line if a hydraulic over-pressure is present. The control valves can be 3/2-directional valves having integrated pressure-limiting valves.

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