Pressure control valve

US6244253A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Rainer Haeberer · Bretten, DE
• Frieder Buerkle · Stuttgart, DE
• Helmut Clauss · Tamm, DE
• Markus Rueckle · Stuttgart, DE

Key dates

• Filing date: Apr 10, 2000
• Grant date: Jun 12, 2001
• Expiry date: Apr 10, 2020

Classification

• Technology area (CPC G): Physics
• CPC primary: G05D16/0402
• WIPO field: Control
• WIPO sector: Instruments

Abstract

A pressure control valve for a fuel injection apparatus for internal combustion engines, including a housing with a high-pressure connection and a return connection and including a cup-shaped piston, which is disposed in a housing bore, can be moved axially between a valve seat oriented toward the high-pressure connection and a stop oriented toward the return connection, counter to the spring force of a spring acting in the direction of the valve seat, and has at least one through opening that connects the inside of the cup-shaped piston to the housing bore, is characterized in that at least one throttle element is disposed upstream and/or downstream of the valve seat in the flow direction of the fuel.