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US 2015/0090215 A1Published application
Piston for an internal combustion engine
AssigneeMahle International GmbH
InventorSascha-Oliver Boczek
Life of this patent
Estimating the term…
Abstract
A piston for an internal combustion engine may include an encircling ring section in a region of a piston crown. The piston may include a convection region, which has at least one cavity containing a heat transfer medium for dissipation of heat from the piston crown to an underside of the piston. The piston may include a heat insulating region, which is arranged between the ring section and the convection region and thermally insulates the ring section.
Claims20
A piston for an internal combustion engine, comprising:
- an encircling ring section in a region of a piston crown, a convection region, which has at least one cavity containing a heat transfer medium for dissipation of heat from the piston crown to an underside of the piston, and a heat insulation region, which is arranged between the ring section and the convection region and thermally insulates the ring section.
A piston for an internal combustion engine, comprising:
- a piston crown having an encircling ring section for receiving piston rings, the piston crown having an outer duct in a region of the ring section and an inner duct arranged radially inside the outer duct and concentric to the outer duct;
- a heat-insulating material arranged in the outer duct for thermally insulating the ring section;
- a heat transfer medium enclosed in the inner duct for dissipation of heat from the piston crown to an underside of the piston by convection;
- and
- a dividing wall separating the outer duct from the inner duct, wherein the dividing wall is arranged obliquely to a piston axis such that the dividing wall has a smaller diameter in the region of the piston crown than in a region of the underside.
2 more elements
Dependencies are inferred from the claim text.