Dual phase graphite cylinder liner and method of making the same
AssigneeDana Corporation
InventorsMichael A. Kestner, Thomas J. Smith, Anthony Angilella
Life of this patent
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Abstract
An inventive cylinder liner of the prevent invention includes a dual phase graphite morphology. An outer diameter of the cylinder liner is comprised of ductile (nodular) and vermicular iron while an inner diameter of the cylinder liner is comprised of predominantly gray iron. A transition region of predominantly vermicular iron is preferably disposed between the inner diameter and the outer diameter. The inventive cylinder is preferably made using a centrifugal casting process, which provides a transition in the cylinder wall between the ductile and verimcular iron at the outer diameter to the predominantly gray iron at the inner diameter.
Claims8
A cylinder liner for use in an internal combustion engine comprising:
- an outer diameter comprised of ductile iron;
- and
- an inner diameter comprised of gray iron.
A cylinder liner for use in an internal combustion engine comprising:
- an outer diameter comprised of ductile iron and vermicular iron;
- an inner diameter comprised of gray iron and vermicular iron;
- and
- a transition region positioned between said outer diameter and said inner diameter, said transition region comprised of vermicular iron at a greater concentration than at said outer diameter or said inner diameter.
Dependencies are inferred from the claim text.