Electrically rotatable shaft
AssigneeINA-Schaeffler KG
InventorUlrich Grau
Life of this patent
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Abstract
The invention concerns an electrically rotatable shaft, and more particularly, an adjusting shaft (1) of a fully variable mechanical valve train of an internal combustion engine, said shaft comprising an adjusting cam (2). The rapid and exact rotation of the adjusting shaft (1) that is required for the fully variable valve train is achieved by the fact that the valve train comprises an actuator (3) that comprises an adjusting lever (4) connected rotationally fast to the adjusting shaft (1), and the free end of the adjusting lever is articulated through a forked lever (5) on a screw nut ((8) of a screw-and-nut drive (6) that is driven by an electromotor (7).
Claims7
An electrically rotatable adjusting shaft of a fully variable mechanical valve train of an internal combustion engine, said shaft comprising an adjusting cam, wherein an actuator for rotating the adjusting shaft comprises an adjusting lever that is connected rotationally fast to the adjusting shaft, and a free end of the adjusting lever is articulated through a forked lever on a screw nut of a screw-and-nut drive that is driven by an electromotor, the forked lever and the screw nut comprise two further bearing pins with which they are articulated on each other, said further bearing pins having a common axis that extends through a center and through a longitudinal axis of the screw nut and an electromotor shaft and the threaded screw are made together in one piece.
Dependencies are inferred from the claim text.