Piston for an internal combustion engine
First Claim
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1. A piston for an internal combustion engine, comprising:
- a lower piston part; and
an upper piston part connected with the lower piston part by friction welding to form an outer circumferential cooling channel, said upper piston part having a circumferential ring belt provided with ring grooves, an inner wall of said ring belt delimiting the outer circumferential cooling channel,wherein an outer circumferential friction-weld seam is provided below the ring belt, said outer circumferential weld seam having a width that is at most equal to a wall thickness between a groove root of each of the ring grooves and the inner wall of the ring belt.
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Abstract
A piston for an internal combustion engine has a lower piston part and an upper piston part that are connected with one another by friction welding and form an outer circumferential cooling channel. The upper piston part has a circumferential ring belt provided with ring grooves, the inner wall of which delimits the circumferential outer cooling channel. An outer circumferential friction-weld seam is provided below the ring belt, the width of which seam is less than or equal to the wall thickness between the groove root of the ring grooves and the inner wall of the ring belt.
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Citations
6 Claims
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1. A piston for an internal combustion engine, comprising:
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a lower piston part; and an upper piston part connected with the lower piston part by friction welding to form an outer circumferential cooling channel, said upper piston part having a circumferential ring belt provided with ring grooves, an inner wall of said ring belt delimiting the outer circumferential cooling channel, wherein an outer circumferential friction-weld seam is provided below the ring belt, said outer circumferential weld seam having a width that is at most equal to a wall thickness between a groove root of each of the ring grooves and the inner wall of the ring belt. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification