Injection valve

US4981266A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Karl Aichele · Stuttgart, DE
• Wolfgang Kramer · Jena, DE
• Ernst Lang · Gerlingen, DE
• Mathias Linssen · Scheßlitz, DE
• Alois Stemmer · Leinfelden, DE
• Michael Wissmann · Markgröningen, DE

Key dates

• Filing date: Sep 20, 1989
• Grant date: Jan 1, 1991
• Expiry date: Sep 20, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S239/90
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An injection valve for fuel injection systems in internal combustion engines which comprises a movable valve element cooperating with a valve seat disposed in a nozzle body, with a guide bore provided downstream of the valve seat. A swirl insert is partially compressed in the guide bore and disposes open swirl channels in the direction of its circumference. The swirl channels extend in an axial direction from one end of the swirl insert to the other, are slanted toward the longitudinal shaft of the injection valve and discharge in a tangential direction into a preparation bore. The swirl channels serve simultaneously as metering channels whose throttling length is adjustable by displacing the swirl insert inside the guide bore.