Valve for ventilation of a tank

US9777677B2 · kind B2 · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Markus Timmer · Leonberg, DE
• Stephan Becker · Marburg, DE

Key dates

• Filing date: Nov 13, 2014
• Grant date: Oct 3, 2017
• Expiry date: May 21, 2035

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7837
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A tank ventilation valve has a housing (21), a closing member (4), a sealing seat (5) and a first space (17). A second space (18) is connected to the first space (17) via a control opening (19) that surrounds the sealing seat (5). A spring (6) pretensions the closing member (4) against the sealing seat (5) and closes the control opening (19). The closing member (4) opens as a function of a pressure difference between the first and second spaces (17, 18). The opened closing member (4) opens the control opening (19) so that the first space (17) is connected to a first line (2) connects to fresh air. The second space (18) is connected to a second line (3) that is attachable to a filter. Structure is provided to exert a further negative pressure on the closing member (4) to move the closing member (4) into the open position.