Check valve for a high-pressure pump of a fuel injection system for an internal combustion engine

US7290559B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Markus Nieslony · Salach, DE
• Alfons Schoetz · Rutesheim, DE
• Matthias Distel · Esslingen am Neckar, DE
• Achim Koehler · Ditzingen, DE
• Falko Bredow · Waiblingen, DE
• Waldemar Kiel · Gerlingen, DE
• Jochen Aleker · Stuttgart, DE

Key dates

• Filing date: Apr 8, 2004
• Grant date: Nov 6, 2007
• Expiry date: Jan 28, 2025

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/7932
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A check valve having a valve housing inserted into a receptacle in which housing a pistonlike valve member is guided longitudinally displaceably and cooperating with a valve seat on the valve housing. The valve member is urged in the closing direction by a prestressed closing spring and in the opening direction by the pressure prevailing in an inlet, and the valve member is inserted into the valve housing from the side of the valve seat. The valve housing is embodied in one piece and is embodied as cup-shaped and has both a bottom and a jacket region that defines a recess. With the open end of its recess, the valve housing points out of the receptacle, and the valve seat is located on the bottom of the valve housing, facing away from the recess. With a shaft, the valve member protrudes through a bore in the bottom into the recess in which the closing spring is located.