Switchable drag lever of a valve timing mechanism of an internal combustion engine

US7240652B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Bodo Roerig · Weisendorf, DE
• Stefan Gemein · Fürth, DE
• Nicola Morelli · Herzogenaurach, DE

Key dates

• Filing date: Aug 4, 2006
• Grant date: Jul 10, 2007
• Expiry date: Aug 4, 2026

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01L2305/00
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A switchable drag lever (1) of a valve timing mechanism of an internal combustion engine is proposed, having an outer lever (3) and an inner lever (4) which is arranged between the said outer lever (3). The drag lever (1) has a rest (7) for a gas exchange valve on an underside (5) at one end (6), and a pivoting bearing (9) for a supporting element on an underside (5) at the other end (8). The levers (3, 4) extend at one end (6) on a common pin (10). Receptacles (10a, 10b) for coupling means are provided which extend longitudinally at the end (8) facing away from the pin (10) and are aligned with respect to one another in the cam base circle. The side walls (2) of the outer lever (3) have contact faces (12) for lifting cams on their upper sides (11). A segment-like collar (13) protrudes inwards from each upper side (11), which segment-like collar (13) forms a structural unit with the respective contact face (12), the corresponding underside (14) of the collar (13) bearing against a complementary stop face (15) of an upper side (16) of the adjacent arm (2a) of the inner lever (4) in the coupling case. Alignment of the receptacles (10a, 10b) is therefore provided in a simple way for t…