Process for controlling a gas exchange valve for internal combustion engines

US6321702A · 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

Key dates

• Filing date: May 11, 2000
• Grant date: Nov 27, 2001
• Expiry date: May 11, 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 system for controlling a gas exchange valve for internal combustion engines, comprising a movable valve member in a housing which, on an end close to the combustion chamber, has a valve sealing face that cooperate with a valve seat in order to control an inlet or outlet cross section at the combustion chamber of the engine. On an end remote from the combustion chamber a working piston defines at least one hydraulic working chamber, whose alternating filling and discharging with a pressure fluid can be used to move the valve member in the opening and closing direction. The supply pressure of the pressure fluid supplied for the actuation of the gas exchange valve member is adjusted step wise as a function of current operating parameters of the engine.