Valve engine

US7472671B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Harald Elendt · Meckenheim, DE
• Christof Faria · Erlangen, DE

Key dates

• Filing date: Jul 2, 2005
• Grant date: Jan 6, 2009
• Expiry date: Aug 12, 2025

Classification

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

Abstract

A valve drive for an internal combustion engine having at least one camshaft which has a toothed shaft (2) and at least one cam part (3) with a plurality of different cam paths (13, 14) arranged adjacent to one another for the variable actuation of gas exchange valves (8) by displacement of the cam parts (3) by means of actuators (actuator pins 4 and 5) on the toothed shaft (2), the toothed shaft (2) having a shaft profile (9) and the cam parts (3) having a hub profile (10) which is matched to said shaft profile (9), and the number of wedges, notches or teeth (19) of the shaft profile (9) and of the hub profile (10) being such that the different cam positions for four-stroke internal combustion engines of any type such as in-line engines, V-engines or W-engines, and with any numbers of cylinders, can be provided with the same toothed shafts (2) and cam parts (3).