Switchable rocker arm of a valve drive pertaining to an internal combustion engine

US7503300B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Joachim Seitz · Frensdorf, DE
• Bodo Rorig · Herzogenaurach, DE

Key dates

• Filing date: Jan 25, 2006
• Grant date: Mar 17, 2009
• Expiry date: Jan 25, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T74/2107
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

A switchable finger lever (1) for a valve drive of an internal combustion engine is provided. The inner lever (3) of the finger lever includes a piston (6) on one end thereof, that can be longitudinally displaced, and acts as a coupling element. The coupling element can be partially brought into contact with a driving surface (7) of an outer lever (2), and is provided, for example, with a rising radial profile (13) in the coupling region thereof, and from the front (12) in the coupling direction. The driving surface (7) of the outer lever (2) also has a conical contour which follows the profile (13). During coupling, a contact point (K) of the piston (6) is located on the driving surface (7) in a region of half a depth thereof. In this way, the formation of undesired edge supports is prevented during coupling.