Fuel injection valve

US6808134B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Klaus Noller · Oppenweiler, DE
• Uwe Liskow · Asperg, DE
• Martin Buehner · Backnang, DE
• Guido Pilgram · Schwieberdingen, DE
• Juergen Maier · Weitersweiler, DE
• Hartmut Albrodt · Tamm, DE

Key dates

• Filing date: Aug 19, 2002
• Grant date: Oct 26, 2004
• Expiry date: Jan 26, 2023

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/306
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A fuel injector, particularly a fuel injector for fuel injection systems in internal combustion engines, has a valve needle, which cooperates with a valve-seat surface to form a sealing seat, and an armature, which engages with the valve needle, the armature being movable along the axis of the valve needle and being damped by a damping element made from an elastomer. In this context, a first intermediate ring is situated between the armature and the damping element. The damping element rests on the flange, which is connected in a force-locking manner to the valve needle. The intermediate ring and/or the flange is furnished with radial and/or axial channels which connect an interior volume located between the valve needle and the damping element to a central cutaway of the fuel injector.