Pressure control valve

US8752585B2 · kind B2 · utility

Assignee

• PIERBURG GMBH · DE

Inventors

• Werner Buse · Kaarst, DE
• Alvito Fernandes · Leverkusen, DE

Key dates

• Filing date: May 19, 2010
• Grant date: Jun 17, 2014
• Expiry date: Jan 8, 2031

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86919
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A pressure control valve includes a housing comprising a reference pressure connection, a reference pressure chamber, a preliminary pressure connection, a preliminary pressure chamber, a control pressure connection and a control pressure chamber which are configured to cooperate with a control member moveable in an axial direction within the housing so as to adjust a desired control pressure between a preliminary pressure at the preliminary pressure connection and a reference pressure at the reference pressure connection. A driving device is configured to act on the control member. At least one first sealing device is configured to seal the reference pressure chamber against the control member. At least one second sealing device comprising a second sealing element is configured to seal the preliminary pressure chamber against the reference pressure chamber. At least one third sealing device is configured to seal the control pressure chamber against the preliminary pressure chamber.