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US 4,838,149 AGranted
Pistons
AssigneeAe PLC
InventorsGeoffrey M. Donnison, Robert A. Wordsworth, Michael L. P. Rhodes
Life of this patent
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AssigneeAe PLC
InventorsGeoffrey M. Donnison, Robert A. Wordsworth, Michael L. P. Rhodes
Estimating the term…
Pistons for internal combusion engines are described. The pistons comprise a crown component and a skirt component wherein the crown component consists of an iron or nickel based alloy annular portion having fitted directly therein a ceramic insert, the crown component being joined to the skirt component by an annular composite laminated member of steel and aluminium alloy the steel of the laminated member being energy beam welded to the annular portion of the crown component and the aluminum alloy of the laminated member being energy beam welded to the skirt component there being after welding a sealed, hollow, annular chamber disposed at the junction between the crown component and the skirt component. Embodiments are described having ceramic inserts of silicon nitride and including combustion bowls.
A piston for an internal combustion engine comprising a crown component and a skirt component wherein the crown component consists of an iron-based or nickel-based alloy annular portion having fitted therein a ceramic insert which is retained by interference, said crown component being joined to said skirt component by an annular composite laminated member of steel and aluminium alloy, the steel of the laminated member being energy beam welded to said annular portion of said crown component, and the aluminium alloy of said laminated member being energy beam welded to said skirt component, there being after welding a sealed, hollow, annular chamber disposed at the junction between said crown component and said skirt component.
Dependencies are inferred from the claim text.