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US 8,950,375 B2Granted
Piston for an internal combustion engine
AssigneeMahle International GmbH
InventorsPeter Grahle, Wilfried Sander, Joachim Schulz, Andreas Seeger-Van Nie
Life of this patent
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Abstract
A piston for an internal combustion engine has a lower piston part and an upper piston part disposed on the lower piston part. The upper piston part has a top land that runs around its circumference, and a ring belt that runs around its circumference. At least the upper piston part consists of a sintered material.
Claims16
A piston for an internal combustion engine, comprising:
- a lower piston part;
- and
- an upper piston part connected to the lower piston part, said upper piston part having a top land that runs around its circumference and a ring belt that runs around its circumference,
- wherein the lower piston part and the upper piston part cooperate to enclose an outer circumferential cooling channel;
- wherein the lower piston part and the upper piston part have inner and outer joining surfaces that correspond to one another, the inner joining surfaces of the lower and upper piston parts disposed on an opposite side of the outer circumferential cooling channel from the outer joining surfaces of the lower and upper piston parts;
- wherein at least the upper piston part comprises a sintered material;
- and
- wherein the lower piston part and the upper piston part are connected with one another by means of a solder material, and wherein the sintered material is infiltrated by the solder material.
5 more elements
Dependencies are inferred from the claim text.