Variable valve lift device for the lift adjustment of gas-exchange valves of an internal combustion engine

US7895981B2 · kind B2 · utility

Assignees

• enTec Consulting GmbH · DE
• Hydraulik-Ring GmbH · DE

Inventors

• Gerlinde Bosl-Flierl · Kaiserslautern, DE
• Rudolf Flierl · Kaiserslautern, DE
• Wilhelm Hannibal · Neckarsulm, DE
• Michael Jubelt · Esslingen am Neckar, DE
• Andreas Knecht · Herrenberg, DE
• Andreas Wild · Weimar, DE

Key dates

• Filing date: Mar 26, 2004
• Grant date: Mar 1, 2011
• Expiry date: Oct 7, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/20882
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

In order to produce a variable valve lift device for the lift adjustment of the gas-exchange valves of an internal combustion engine, by means of which with adjustment forces and holding forces, independently from whether said holding forces and adjustment forces are applied mechanically, hydraulically or electrically, with an adjustment of the valve lift being as cost-effective as possible, and with maximum accuracy of the adjustment or control of the valve lift to be taken between the individual cylinders of a multi-cylinder internal combustion engine, and, moreover, the adjustment possibility of the valve lift of the valves of an internal combustion engine with several cylinders is obtained within smallest tolerances, it is suggested that a valve lift device (1) has a rotatable eccentric shaft (3), which consists of several eccentrics (4, 5) and whereby all possible contours of the eccentrics (4, 5) are positioned within a circle, which is formed by means of the external diameters of a bearing (6, 7) of the eccentric shaft (3).