PISTON FOR AN INTERNAL COMBUSTION ENGINE
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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.
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Citations
41 Claims
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1-21. -21. (canceled)
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22. A piston, comprising:
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a lower piston part having radially inner and radially outer joining surfaces; and an upper piston part having radially inner and radially outer joining surfaces, the upper piston part inner and outer joining surfaces connected to the inner and outer joining surfaces of the lower piston part, respectively, wherein the lower piston part and the upper piston part cooperate to enclose an outer circumferential cooling channel disposed radially between the inner joining surfaces and radially between the outer joining surfaces, the upper piston part having a top land extending around its circumference;
wherein the upper and lower piston parts cooperate to define a combustion bowl, and the inner joining surfaces of the upper and lower piston parts meet in the combustion bowl;wherein the lower and upper piston parts are joined solely by the connection along the inner and outer joining surfaces. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A piston, comprising:
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a lower piston part having radially inner and radially outer joining surfaces; and an upper piston part having radially inner and radially outer joining surfaces, the upper piston part inner and outer joining surfaces connected to the inner and outer joining surfaces of the lower piston part, respectively, wherein the lower piston part and the upper piston part cooperate to enclose an outer circumferential cooling channel disposed radially between the inner joining surfaces and radially between the outer joining surfaces, the upper piston part having a top land extending around its circumference;
wherein the upper and lower piston parts cooperate to define a combustion bowl, and the inner joining surfaces of the upper and lower piston parts meet in the combustion bowl such that the upper piston part defines a radially outer portion of the combustion bowl, and the lower piston part defines a radially inner portion of the combustion bowl;wherein the lower and upper piston parts are joined solely by the connection along the inner and outer joining surfaces. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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Specification