Patent ID: 7762224
Filing Date: 2010-07-27
Classification: F01L

Abstract:
1. A switchable support element for a valve train of an internal combustion engine, said switchable support element comprising a pot-shaped housing that can be arranged with an outer peripheral surface in a reception of the internal combustion engine and in whose bore an axially displaceable pressure piston extends, a head of the pressure piston projecting beyond an edge of the housing, at least one coupling element for an optional coupling of the pressure piston in an axially extended position relative to the housing being associated to the support element, and said pressure piston being biased in an outward direction from the housing by at least one lost motion spring, wherein the housing ends in a solid bottom which comprises a central aperture starting from an inner side of the housing, the aperture is intersected in radial or secant relationship by a reception of the housing comprising the at least one coupling element, the pressure piston extends with an outer peripheral surface of a head-side guide section directly in the bore of the housing, said guide section connects in bore direction to a radially reduced center piece that merges into a head-distal end piece that is guided in the aperture of the bottom, the lost motion spring surrounds the center piece while being supported at one end on the inner side of the bottom and acting at a further end against an underside of the guide section, and the end piece comprises an entraining surface for at least one coupling element for achieving coupling.