Adjusting bush for an electromagnetically actuatable valve

US5165656A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Martin Maier · Asperg, DE
• Ferdinand Reiter · Markgröningen, DE
• Dieter Etzel · Lambach, DE

Key dates

• Filing date: Feb 12, 1992
• Grant date: Nov 24, 1992
• Expiry date: Feb 12, 2012

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F02M2200/505
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An electromagnetically actuatable valves, including an adjusting bush pressed into a flow bore of a core of a coil in order to adjust a spring force of a restoring spring. The novel adjusting bush includes at least two longitudinal beads, extending in the direction of the longitudinal valve axis on its circumference that protrude past a jacket of the adjusting bush in the radial direction. The transitional region between the jacket and each of the longitudinal beads is embodied as rounded, at least in the direction of the longitudinal valve axis. Thus when the adjusting bush is pressed into the flow bore of the core, the production of chips at the adjusting bush and flow bore is prevented. The adjusting bush is especially well-suited for injection valves of fuel injection systems in internal combustion engines.