Multipart composite valve for an internal combustion engine
AssigneeDaimler AG
InventorsHolger Stark, Martin Schlegl
Life of this patent
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Abstract
A multipart composite valve for an internal combustion engine, in which a valve shaft (2) and a valve plate (4) are embodied separately while being joined together in an overlapping area (6). The invention is characterized in that at least some parts of the valve shaft (2) are provided with an intermediate layer (8) in the overlapping area (6). Said intermediate layer (8) forms an integral joint with both the valve shaft (2) and the valve plate (4) in the form of a chemical bond, the valve plate (4) being cast onto the valve shaft (2).
Claims7
A multi-part composite valve (1) for an internal combustion engine, wherein a steel valve shaft (2) and a Ti—Al valve plate (4) are separately produced and joined to each other in an overlap area (6), wherein the valve plate (4) is cast on-to the valve shaft (2), and wherein the valve shaft (2) in the overlap area (6) is provided, prior to the casting-on, at least partially with at least one intermediate layer (8) comprised of an Ag-base alloy and/or Ni-base alloy and/or Cu-base alloy or is constituted on the basis of a metal oxide, which subsequent to the casting-on is material-to-material bonded both to the valve shaft (2) and the valve plate (4) in the manner of a chemical bond.
Dependencies are inferred from the claim text.