Pressure regulator for gaseous media

US8096522B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Georg Bachmaier · Birkenfeld, DE
• Gerit Ebelsberger · Birkenfeld, DE
• Matthias Gerlich · Munich, DE
• Michael Hoge · Waukesha, US
• Erhard Magori · Straubing, DE
• Randolf Mock · Munich, DE
• Harry Schüle · Neunburg vorm Wald, DE
• Stefan Treinies · Regensburg, DE

Key dates

• Filing date: Apr 5, 2007
• Grant date: Jan 17, 2012
• Expiry date: Dec 18, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/30
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A pressure regulator can be used particularly in a CNG-operated motor vehicle as an electronically controlled pressure reducer for maintaining the gas pressure constant on the injection valve used for filling the respective cylinder. The pressure regulator is composed of a control unit (1), a pressure reducer (3) that is controlled by the control unit (1), and a throttle (2) which connects the gas outlets (20, 40) of the working chamber (17) of the control unit (1) and the pressure reducer (3). A piezoelectric actuator (11) which affects the valve (21, 22) of an overflow device (14) makes it possible to specifically modify the gas pressure (P2) in the working chamber (17) of the control unit (1) and simultaneously influence the position of the valve (38, 39) of the overflow device (33) of the pressure reducer (3), thus allowing the output pressure (Pout) of the pressure reducer (3) to be adjusted to a predefined desired value.