Hydraulic system providing pressure and volume flows in a double-clutch transmission

US7401689B2 · kind B2 · utility

Assignee

• GETRAG FORD Transmissions GmbH · GB

Inventors

• Andreas Hegerath · Bergheim, DE
• Martin Leibbrandt · Bedburg, DE
• Reinhard Moehlmann
• Ulrich Eggert · Viersen, DE

Key dates

• Filing date: Oct 14, 2005
• Grant date: Jul 22, 2008
• Expiry date: May 16, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H2061/126
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A hydraulic system for providing pressure and volume flows in a double-clutch transmission. A first clutch and a second clutch are preceded by at least one changeover valve which, in a first state, guides lubricating flow to the first clutch and cooling flow to the second clutch, and, in a second state, guides lubricating flow to the second clutch and cooling flow to the first clutch. The cooling flow is preferably variable.