High-pressure pump, in particular for a fuel injection device of an internal combustion engine

US7308849B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Alfons Schoetz · Rutesheim, DE
• Walter Fuchs · Stuttgart, DE
• Gerhard Meier · Schorndorf, DE
• Jochen Aleker · Stuttgart, DE
• Andreas Dutt · Stuttgart, DE

Key dates

• Filing date: Sep 14, 2004
• Grant date: Dec 18, 2007
• Expiry date: Dec 8, 2024

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F04B1/0439
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A high-pressure pump has at least one pump element including a pump piston defining a work chamber and driven at least indirectly by a drive shaft in a reciprocating motion, counter to the force of a restoring spring. The pump piston is braced on the drive shaft at least indirectly via a sleevelike tappet, and the restoring spring engages at least the pump piston. A support element in the tappet braces the pump piston toward the drive shaft and is braced at least indirectly on the drive shaft. The restoring spring, via a spring plate, engages the pump piston and the tappet. The spring plate is elastically deformable in the direction of motion of the pump piston in such a way that as a result of its elastic deformation, deviations in the position of its contact faces on the pump piston and on the tappet are compensated for.