Switchable support element for a valve train of an internal combustion engine

US8082896B2 · kind B2 · utility

Assignee

• Schaeffler KG · DE

Inventors

• Mario Kuhl · Herzogenaurach, DE
• Bodo Rorig · Herzogenaurach, DE

Key dates

• Filing date: Feb 19, 2008
• Grant date: Dec 27, 2011
• Expiry date: May 28, 2028

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 support element for a valve train of an internal combustion engine, comprising a housing that can be arranged with an outer peripheral wall in a reception of the internal combustion engine, an axially displaceable pressure piston extending in a bore of the housing, said pressure piston being loaded by a lost motion spring means in a direction leading out of the housing, a head of the pressure piston extending beyond an edge of the housing, and at least one coupling piston extending in a cross-bore of the pressure piston, which can be brought partially into engagement with an entraining surface of the housing for achieving coupling, wherein, starting from an outer front end of the at least one coupling piston, a flattened portion is arranged on an underside of the coupling piston wherein a flattened portion is arranged on an underside of the coupling piston, the entraining surface in the housing per coupling piston is constituted by an underside of a window-like aperture in the bore of the housing, on which underside the at least one coupling piston can be displaced with said flattened portion for achieving coupling, and the pressure piston comprises an anti-rotation de…