Vent valve for a fuel tank

US7213582B2 · kind B2 · utility

Assignee

• Kautex Textron GmbH & Co. KG · DE

Inventors

• Volker Treudt · Windeck, DE
• Werner Buse · Kaarst, DE

Key dates

• Filing date: Dec 22, 2005
• Grant date: May 8, 2007
• Expiry date: Dec 22, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86332
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A compact venting valve for the fuel tank of a motor vehicle comprises a valve housing with at least one switchable element for providing at least two switching positions and with at least three connections, a first connection to the fuel tank or to a fuel vapor filter connected downstream thereof, a second connection to a filling pipe of a fuel tank and a third connection to atmosphere. The valve housing includes at least one first filter chamber enclosing a second fuel vapor filter, wherein a first switching position provides for operational venting of the fuel tank in which a flow path between the first and second connections is enabled and a second switching position provides for refuelling venting of the fuel tank in which a flow path between the first and second connections is enabled with the second fuel vapor filter being bypassed.