Valve control device for an internal combustion engine

US6178935A · kind A · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Udo Diehl · Stuttgart, DE
• Karsten Mischker · Leonberg, DE
• Rainer Walter · Pleidelsheim, DE
• Stefan Franzl · Drancy, FR
• Volker Beuche · Stuttgart, DE
• Stefan Reimer · Markgröningen, DE
• Ulrich Kappenstein · Knittlingen, DE

Key dates

• Filing date: May 8, 2000
• Grant date: Jan 30, 2001
• Expiry date: May 8, 2020

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L9/10
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A valve control device for an internal combustion engine having a gas exchange valve for controlling an inlet and/or outlet cross section in the combustion chamber of the engine. The valve control device has an axially movable gas exchange valve member whose valve member shaft is coupled to a piston rod to a differential piston that can be hydraulically actuated. The differential piston is embodied as two piston parts, wherein the two piston parts are disposed in relation to one another in such a way that they are operatively connected to each other in the axial direction and can execute a radial relative movement in relation to each other.