Single-part cooling channel piston for a combustion engine
AssigneeMahle GmbH
InventorsHans-Jürgen Köhnert, Peter Kemnitz
Life of this patent
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Abstract
A single-part cooling channel piston for a combustion engine with a piston head of forged steel comprises a combustion bowl in the piston crown, a ring wall with ring belt and an all-round closed cooling channel level with the ring belt. The piston skirt is connected to the pin bosses attached to the piston head. Inexpensive manufacture together with improved cooling and good form stability of the piston is achieved by providing the cooling channel with holes spread over its circumference towards the piston crown and spaced such that the piston material present between such holes forms supporting ribs for the piston crown.
Claims7
A single-part cooling channel piston for a combustion engine, comprising;
- a piston head of forged steel, said piston head comprising a combustion bowl in a piston crown, a ring wall with a ring belts and an all-round closed cooling channel level with the ring bell, and
- a piston skirt connected to pin bosses attached to the piston head,
- wherein the cooling channel has holes spread in areas in which combustion radiation from ignited fuel impacts the piston crown, said holes being arranged over a circumference of the cooling channel towards the piston crown, said holes being spaced depending on a temperature distribution of said areas caused by the combustion radiation such that piston material present between said holes forms supporting ribs for the piston crown.
A piston according to claim 5, wherein the holes are of the same diameter as each other.
Dependencies are inferred from the claim text.