Pressure control valve

US11022185B2 · kind B2 · utility

Assignee

• ZF FRIEDRICHSHAFEN AG · DE

Inventors

• Karsten Kudermann · Konstanz, DE
• Rainer Novak · Bregenz, AT
• Tobias Pfleger · Markdorf, DE
• Markus Moosmann · Grünkraut, DE

Key dates

• Filing date: Jun 3, 2019
• Grant date: Jun 1, 2021
• Expiry date: Jul 30, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K3/0254
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pressure control valve (1) includes a pressure port (P), a consumer port (A), a tank port (T), and a piston (K) which is displaceable counter to the force of a first spring (F1) and a second spring (F2). The springs (F1, F2) and area ratios of the pressure control valve (1) are designed such that the pressure port (P), in the non-pressurized condition, is connected to the consumer port (A) via an opening cross-section of the pressure control valve (1). An opening cross-section between the pressure port (P) and the consumer port (A) decreases depending on the pressure at the consumer port (A), and, upon attainment of a limiting pressure at the consumer port (A), the consumer port (A) is connected to the tank port (T). A related hydraulic system (HY) and a related motor vehicle transmission (G) are also provided.