Fuel injection device for an internal combustion engine

US7267109B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Peter Boehland · Erbach, DE
• Hans-Christoph Magel · Pfullingen, DE
• Sebastian Kanne · Stuttgart, DE
• Godehard Nentwig · Stuttgart, DE
• Michael Bauer · Unterföhring, DE

Key dates

• Filing date: Jun 9, 2004
• Grant date: Sep 11, 2007
• Expiry date: Jun 9, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/46
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection device for an internal combustion engine, having two valve elements each having a hydraulic control surface acting in the closing direction and associated with a hydraulic control chamber. A control valve influences the pressure in the control chamber, and loading devices act on the valve elements in the opening direction. The valve elements react at different hydraulic opening pressures prevailing in the control chamber. The control valve is able to set at least three different pressure levels in the control chamber: all of the valve elements are closed at a comparatively high pressure level; one valve element is open at a medium pressure level; and all of the valve elements are open at a comparatively low pressure level.