Proportional pressure adjustment valve

US6904934B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Wolfgang Runge · Ravensburg, DE
• Hubert Remmlinger · Friedrichshafen, DE
• Karlheinz Mayr · Zell im Wiesental, DE
• Wolfgang Schmid · Regensburg, DE
• Thilo Schmidt · Meckenbeuren, DE

Key dates

• Filing date: Jul 13, 2001
• Grant date: Jun 14, 2005
• Expiry date: Jul 13, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87217
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A proportional pressure adjustment valve is described which comprises one valve part with inlet and outlet openings (4) and at least one closing mechanism (7) for control of a valve (12), the same as a magnet part having one magnet core, one magnet coil and one displaceably disposed magnet armature. An actuating element (11) cooperates with the armature, actuating the spherical closing mechanism (7). The hydraulically active cross section of the valve (12) is essentially determined by the length of the valve (L), the diameter of the valve (D) and th diameter (d) of the part (13) of the actuating element (11) which penetrates into the valve. According to invention, the ratio of the length of the valve (L) to the diameter of the valve (d) is less than 2.0.