Pressure control valve

US7229063B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Thies Hameister · Friedrichshafen, DE
• Walter Kill · Friedrichshafen, DE
• Karlheinz Mayr · Zell im Wiesental, DE
• Wolfgang Schmid · Regensburg, DE

Key dates

• Filing date: Sep 21, 2004
• Grant date: Jun 12, 2007
• Expiry date: Mar 28, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87233
• WIPO field: Control
• WIPO sector: Instruments

Abstract

The invention concerns a pressure control valve for the control of the value of pressure in a hydraulic circuit, especially in a hydraulic circuit of a vehicle transmission, with a valve housing, with a solenoid coil, with an armature component group comprising an armature rod, an armature and advantageously, a spring, with a yoke and with a push rod, which is interposed between the armature rod and a control element, whereby the section of the valve housing (3) in the zone of the control element (16) consists of a plastic flange (2a), and further, the armature rod (1) possesses a control boring in the longitudinal direction, in which a pin (12, 12′, 12″) is inserted, the material and dimensioning are so selected, that the pin can compensate for a temperature based longitudinal change of the plastic flange (2a).