Liquid-cooled piston
AssigneeFederal-Mogul Nurnberg GmbH
InventorsEdgar Martin, Stephan Thieme
Life of this patent
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Abstract
The invention relates to a liquid-cooled piston (10) for internal combustion engines having a cooling duct (16) that has an annular shape or consists of several annular segments, said duct having a substantially constant cross section along its extension and extending in an undulated manner at least in certain areas in the direction of the axis of the piston (18).
Claims5
Liquid-cooled piston (10) for internal combustion engines having a cooling duct (16) that has an annular shape or consists of several annular segments, said duct having a substantially constant cross section along its extension,
- characterized in that
- the duct (16) extends in an undulated manner at least in certain sections in the direction of the axis piston (18).
A piston as in at least one of the previous claims,
- characterized in that
- there is an uneven number of complete waves in one half of the cooling duct (16) so that a wave crest (20c) is located above the piston-pin bore (12).
A piston as in at least one of the previous claims,
- characterized in that
- the cross section of the cooling duct (16) is basically oval and is preferably inclined outwards.
Dependencies are inferred from the claim text.