Oil pressure regulating valve

US4657043A · kind A · utility

Assignee

• Dr. Ing. h.c. F. Porsche AG · DE

Inventors

• Herbert Ampferer · Sachsenheim, DE
• Robert Binder · Dresden, DE

Key dates

• Filing date: Nov 27, 1985
• Grant date: Apr 14, 1987
• Expiry date: Nov 27, 2005

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7937
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A pressure relief valve for a lubrication system of an internal combustion engine includes a valve body disposed within a generally cylindrical bore in a housing. The valve body is axially movable within the bore and is provided with a sealing surface on one end. A spring biases the sealing surface against a valve seat in the housing. A guide, which is preferably sleeve-shaped, is non-fixedly arranged within the bore for guiding the axial movement of the valve body and reducing the impact of manufacturing tolerance variations on valve operation. In a preferred embodiment, the sealing surface of the valve body is spherically shaped and the valve seat is conically shaped. A vent passage is provided in the sleeve-shaped guide to equalize pressures within the bore during operation of the valve.