Mechanically controllable valve-train assembly

US9074495B2 · kind B2 · utility

Assignee

• KOLBENSCHMIDT PIERBURG INNOVATIONS GMBH · DE

Inventors

• Rudolf Flierl · Kaiserslautern, DE
• Manfred Kloft · Königslutter am Elm, DE
• Paul Gnegel · Lehre, DE
• Karsten Grimm · Aachen, DE
• Martin Nowak · Leverkusen, DE

Key dates

• Filing date: Jan 13, 2012
• Grant date: Jul 7, 2015
• Expiry date: Jan 13, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2800/12
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A mechanically controllable valve-train assembly includes a plurality of gas exchange valves, at least two cylinders assigned to each of the gas exchange valves, and valve-lift adjusting devices which each comprise a rotatable eccentric shaft. The eccentric shaft comprises at least one cam element and circumferential control surfaces which comprise at least one eccentric member. The eccentric shaft is driven by a drive device to set various valve-lift positions. A transmission assembly assigned to each of the gas exchange valves is mounted in a cylinder head via a bearing device so as to be movable and is operatively connected to one of the valve-lift adjusting devices and to a camshaft. The at least one cam element is operatively connected to a spring-loaded tappet element and is arranged outside the circumferential control surfaces and at a level of a zero-lift position of the circumferential control surfaces.