Patent · US Expired

Hydraulic system for providing pressures and volumetric flows in a dual clutch transmission

US7395908B2 · kind B2 · utility

9Cited by

2References

16Claims

0Family size

Assignee

GETRAG FORD Transmissions GmbH · GB

Inventors

Andreas Hegerath · Bergheim, DE
Reinhard Möhlmann · Bensberg, DE
Martin Leibbrandt · Bedburg, DE
Ulrich Eggert · Viersen, DE

Key dates

Filing date	Aug 31, 2005
Grant date	Jul 8, 2008
Priority date	—
Expiry date	Apr 24, 2026

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF16H2061/126
WIPO fieldMechanical elements
WIPO sectorMechanical engineering

Abstract

The invention relates to a hydraulic system (1) for providing pressures and volumetric flows in a dual clutch transmission, in particular for providing a first volumetric flow for cooling and lubricating a first clutch (2) and for providing a second volumetric flow for cooling and lubricating a second clutch (3). The hydraulic system is distinguished by the fact that at least one switching valve (4), which in a first position guides a lubricating flow onto the first clutch (2) and a cooling flow onto the second clutch (3) and in a second position guides the lubricating flow onto the second clutch (3) and the cooling flow onto the first clutch (2), is connected upstream of the first clutch (2) and the second clutch (3). The cooling flow is preferably variable.

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