Ventilation arrangement for a fuel tank

US9027590B2 · kind B2 · utility

Assignee

• A. Kayser Automotive Systems GmbH · DE

Inventors

• Torsten Gerlich · Bensheim, DE
• Gerhard Müller-Riederer · Bretzfeld, DE

Key dates

• Filing date: Sep 14, 2012
• Grant date: May 12, 2015
• Expiry date: May 5, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87507
• WIPO field: Transport
• WIPO sector: Mechanical engineering

Abstract

A ventilation arrangement for the head space of the fuel tank of a vehicle comprises a switchable main valve intended for adjusting an arbitrary pressure in the head space of the tank. By way of the opening position of the main valve, a connection between a connection (5) intended for connection to the head space and a connection (6) intended for connection to the surrounding atmosphere is established, wherein the main valve is assigned a pilot valve, which opens during a first path element of a switching movement, wherein the main valve only opens following this first path element. Because of the small cross section of the pilot valve and the pressure relief that materialized through its opening, the switching power can be reduced and a smaller size drive can be employed.