Fuel injection valve

US6474565B1 · 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: Jun 15, 2001
• Grant date: Nov 5, 2002
• Expiry date: Jun 15, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M51/005
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector (1), particularly an injection valve for fuel-injection systems of internal combustion engines, has a piezoelectric or magnetostrictive actuator (16) that is arranged in a valve housing (2) and is sealed off from a fuel by an actuator housing (15), and a valve-closure member (7) which is operable by the actuator (16) with the aid of a valve needle (6) and which cooperates with a valve-seat surface (5) to form a sealing seat. The valve housing (2) and the actuator housing (15) have cut-outs (38, 39) adjoining one another, and the valve housing (2) is joined to the actuator housing (15) in an edge area of the cut-outs (38, 39). In this manner, a feed-through opening (41) is formed which is sealed off from the fuel. The feed-through opening (41) is filled with a filler element (43) by which at least one electrical supply line (37) of the actuator (16) is fixed in position in the feed-through opening (41).