Fuel injection valve

US6712289B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Wolfgang Ruehle · Ditzingen, DE
• Hubert Stier · Asperg, DE
• Matthias Boee · Ludwigsburg, DE
• Guenther Hohl · Stuttgart, DE
• Norbert Keim · Besigheim, DE

Key dates

• Filing date: Nov 20, 2001
• Grant date: Mar 30, 2004
• Expiry date: Nov 30, 2022

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M51/0607
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injection valve, especially an injection valve for fuel injection systems of internal combustion engines, includes a piezoelectric or magnetostrictive actuator and a valve-closure member, which can be actuated by an actuator via a valve needle and interacts with a valve-seat surface to form a sealing seat. An intermediate piece is connected via a first flexible seal to a support plate; the support plate is connected via a second flexible seal to a driver at the valve needle; and the driver is connected via a third flexible seal to the intermediate piece, thereby creating a sealed hydraulic translation device.