Piston, especially cooling channel piston, comprising three friction-welded zones
First Claim
1. A piston of an internal combustion engine with an upper part and a lower part which can be manufactured separately from each other and subsequently joined, where the upper part in conjunction with the lower part forms at least one cooling channel] disposed radially behind a ring zone and wherein further the upper part has at least three radially peripheral joining webs and the lower part similarly has at least three radially peripheral joining webs which are brought together during a joining process and by means of which the upper part is solidly connected to the lower part, and wherein contact surfaces of the at least three facing joining webs lie in three different planes.
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Abstract
A piston, especially a cooling channel piston of an internal combustion engine, has an upper part and a lower part which can be produced separately from each other and subsequently be assembled. The upper part has at least three radially peripheral joining webs and the lower part likewise at least three radially peripheral joining webs. During assembly, the webs are put together and connect the upper part firmly to the lower part.
23 Citations
6 Claims
- 1. A piston of an internal combustion engine with an upper part and a lower part which can be manufactured separately from each other and subsequently joined, where the upper part in conjunction with the lower part forms at least one cooling channel] disposed radially behind a ring zone and wherein further the upper part has at least three radially peripheral joining webs and the lower part similarly has at least three radially peripheral joining webs which are brought together during a joining process and by means of which the upper part is solidly connected to the lower part, and wherein contact surfaces of the at least three facing joining webs lie in three different planes.
Specification