Variable valve train for internal combustion engines for actuating gas exchange valves

US8746195B2 · kind B2 · utility

Assignee

• IAV GmbH Ingenieurgesellschaft Auto und Verkehr · DE

Inventors

• Andreas Werler · Zwickau, DE
• Thomas Arnold · Winslow, US
• Heiko Neukirchner · Chemnitz, DE
• Joerg Wutzler · Zwickau, DE

Key dates

• Filing date: Aug 3, 2010
• Grant date: Jun 10, 2014
• Expiry date: Nov 3, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2013/0052
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A variable valve train for actuating a plurality of gas exchange valves of an internal combustion engine includes a plurality of individual cam sleeves axially displaceable relative to one another and disposed so as to form the camshaft. Each of the plurality of individual cam sleeves include a plurality of different cam profiles. A switching shaft is disposed inside the plurality of cam sleeves and is configured to rotate together with the plurality of cam sleeves. A switching ball operatively connects one of the plurality of cam sleeves to a switching contour disposed on the switching shaft. A displacement piece is disposed so as to be rotationally engaged but axially displaceable on one of the plurality of cam sleeves and connected to the switching shaft. An actuator is operatively connectable to the displacement piece by the switching ball so as to displace the one of the plurality of cam sleeves.