Device for the hydraulic control of gas exchange valves of a reciprocating internal combustion engine

US7987824B2 · kind B2 · utility

Assignees

• Schaeffler KG · DE
• Aft Atlas Fahrzeugtechnik GmbH · DE
• LuK Lamellen und Kupplungsbau Beteiligungs KG · DE

Inventors

• Michael Haas · Weisendorf, DE
• Eduard Golovatai-Schmidt · Hemhofen, DE
• Martin Rauch · Bamberg, DE
• Wolfgang Reik · Bühl, DE
• Dirk Neubauer · Altena, DE
• Detlef Axmacher · Iserlohn, DE
• Lars Pfuetzenreuter · Werdohl, DE
• Dirk Kenter · Werdohl, DE

Key dates

• Filing date: Nov 7, 2007
• Grant date: Aug 2, 2011
• Expiry date: Jan 14, 2028

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2001/34446
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A device for hydraulic control of gas exchange valves of a reciprocating internal combustion engine which has slave cylinders in operative connection with one or more gas exchange valves and master actuators in operative connection with at least one cam provided with a basic and cam profile of a camshaft that is rotatably driven by the engine and can be hydraulically connected to the slave cylinders. The device also has a control device controlled by an actuating member, the device controlling the volume of hydraulic liquid fed to the slave cylinders, and at least one feed line, via which low pressure liquid from a pressure source can be fed to the device by means of at least one non-return valve. The actuators have displaceable vanes, a component carrying the vanes, and cells limited by walls. The vanes are in operative connection with the basic and cam profile of the cam.