Insert for a cylinder sleeve or a cylinder of an internal combustion engine
First Claim
1. A insert for a cylinder sleeve or a cylinder of an internal combustion engine, for narrowing the inside diameter (D) of the cylinder sleeve or cylinder in a region of a top land at an upper dead center of a piston guided in the cylinder sleeve or cylinder, the insert comprising:
- an open, biased ring having a ring joint, said ring being held only by means of its outwardly-acting radial forces, and axially via a recess in the cylinder sleeve or cylinder, so that radial surface pressure is approximately equal around a circumference of said ring, wherein a ratio of ring wall thickness(d) of the insert to inside diameter (D) of the cylinder sleeve or the cylinder amounts to between 0.001 and 0.02.
1 Assignment
0 Petitions
Accused Products
Abstract
An insert for a cylinder sleeve or a cylinder of an internal combustion engine is provided for narrowing the diameter of the cylinder sleeve or cylinder in the region of the upper dead center of a piston guided in the cylinder sleeve or cylinder. The insert is formed as an open, biased ring having a ring joint, which ring is held radially by means of its radial forces, which act outward, and axially by a recess in the cylinder sleeve or cylinder, in such a manner that the radial surface pressure is approximately the same on the circumference, whereby its ratio of ring wall thickness (d) to inside diameter (D) of the cylinder sleeve or the cylinder amounts to between 0.001 and 0.02.
12 Citations
23 Claims
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1. A insert for a cylinder sleeve or a cylinder of an internal combustion engine, for narrowing the inside diameter (D) of the cylinder sleeve or cylinder in a region of a top land at an upper dead center of a piston guided in the cylinder sleeve or cylinder, the insert comprising:
an open, biased ring having a ring joint, said ring being held only by means of its outwardly-acting radial forces, and axially via a recess in the cylinder sleeve or cylinder, so that radial surface pressure is approximately equal around a circumference of said ring, wherein a ratio of ring wall thickness(d) of the insert to inside diameter (D) of the cylinder sleeve or the cylinder amounts to between 0.001 and 0.02. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A cylinder sleeve for a cylinder bore of a cylinder crankcase of an internal combustion engine, comprising:
an insert that narrows an inside diameter (D) of the cylinder sleeve in a region of an upper dead center of a piston guided in the cylinder sleeve, wherein the insert comprises an open, biased ring having a ring joint, said ring being held in such a manner that a radial surface pressure is approximately equal around a circumference of the insert, wherein a ratio of ring wall thickness (d) of the insert to inside diameter (D) of the cylinder sleeve amounts to between 0.001 and 0.02. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for the production of an insert for a cylinder sleeve or a cylinder of an internal combustion engine, for narrowing a diameter of the cylinder sleeve or cylinder in a region of a top land at an upper dead center of a piston guided in the cylinder sleeve or cylinder, comprising the following steps:
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punching a strip having a defined width from a sheet-metal part; forming the strip into an open, biased ring having a ring joint simultaneously with said step of punching, or subsequently thereto; and subsequently introducing said ring into the cylinder sleeve or cylinder, so that a radial surface pressure around a circumference of the ring is approximately equal, wherein a ratio of ring wall thickness (d) of the insert to inside diameter (D) of the cylinder sleeve amounts to between 0.001 and 0.02.
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Specification