Injection valve for injecting fuel into the combustion chamber of an internal combustion engine

US6808132B2 · kind B2 · utility

Assignee

• L'Orange GMBH · DE

Inventors

• Wolfgang Scheibe · Waiblingen, DE
• Horst Ressel · Winnenden, DE

Key dates

• Filing date: Jul 15, 2003
• Grant date: Oct 26, 2004
• Expiry date: Jul 15, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M47/027
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An injection valve for injecting fuel into the combustion chamber of an internal combustion engine has an injector needle guided inside the housing in such a way that it can be displaced longitudinally with a shaft in order to open and close the injection cross-sections. The injector needle is actuated by the fuel pressure which act upon the injector needle and by a closing spring acting in the closing direction of the injection needle. The closing spring is pre-compressed between abutments on the injector needle and the housing and is situated on the perimeter of the injector needle in the area between the injector needle guide and the valve seat. One advantage of the arrangement is the compact construction of the injection valve and the low dead volume of the control chamber on the reverse side of the injector needle.