Cylinder liner

Patent metadata

Field	Value
Publication number	US-9816456-B2
Application number	US-201314412940-A
Country	US
Kind code	B2
Filing date	Jul 5, 2013
Priority date	Jul 6, 2012
Publication date	Nov 14, 2017
Grant date	Nov 14, 2017

Abstract

A cylinder liner for an internal combustion engine may include an outer circumferential surface defined by the cylinder liner composed of a gray cast iron for integrally casting onto a cast material of an engine block. A bonding component may be included for strengthening a bond of the outer circumferential surface to the cast material of the engine block. The bonding component may include at least one of a wire mesh and a wire grid that does not melt during a casting operation of the engine block. The bonding component may be arranged at least in a predefined region on the outer circumferential surface. The bonding component may be welded at least partially to the outer circumferential surface.

First claim

The invention claimed is:

1. A cylinder liner for an internal combustion engine, comprising: an outer circumferential surface defined by the cylinder liner composed of a gray cast iron for integrally casting into a cast material of an engine block, a bonding component for strengthening a bond of the outer circumferential surface to the cast material of the engine block, the bonding component including at least one of a wire mesh and a wire grid that does not melt during a casting operation of the engine block, the bonding component being arranged at least in a predefined region on the outer circumferential surface, wherein the bonding component is welded in at least one region to the outer circumferential surface along a welded connection.

2. The cylinder liner as claimed in claim 1 , wherein at least one of:
the bonding component has a higher melting point than the cast material of the engine block, and
the bonding component is made of steel.

3. The cylinder liner as claimed in claim 1 , wherein the bonding component is stretched over the outer circumferential surface.

4. The cylinder liner as claimed in claim 1 , wherein the welded connection includes a plurality of welding spots securing the bonding component and the outer circumferential surface together.

5. The cylinder liner as claimed in claim 4 , wherein the individual welding spots of the plurality of welding spots are arranged linearly.

6. The cylinder liner as claimed in claim 5 , wherein the plurality of welding spots define at least four welding spot lines arranged distributed over a circumference of the outer circumferential surface.

7. The cylinder liner as claimed in claim 4 , wherein the individual welding spots of the plurality of welding spots are provided at crossing points of individual wires of the at least one of the wire mesh and the wire grid.

8. The cylinder liner as claimed in claim 1 , wherein the cast material of the engine block is composed of a light metal.

9. An engine block for an internal combustion engine, comprising:
an integrally cast cylinder liner composed of a gray cast iron defining an outer circumferential surface, wherein the cylinder liner is arranged in a cast material;
a bonding component disposed between the outer circumferential surface and the cast material and extending at least in part peripherally around the outer circumferential surface, the bonding component having a melting point higher than a melting point of the cast material, wherein the bonding component includes at least one of a wire mesh and a wire grid;
wherein the bonding component is connected to the outer circumferential surface via a spot-welded connection, the spot-welded connection including a plurality of welded spots arranged along an axial direction of the cylinder liner to define at least two axially extending welded spot lines distributed circumferentially around the outer circumferential surface.

10. A method for producing an engine block for an internal combustion engine comprising:
preparing a cylinder liner of a gray cast iron defining an outer circumferential surface for casting into a cast material, and positioning a bonding component at least in a predefined region on the outer circumferential surface wherein the bonding component includes at least one of a wire mesh and a wire grid for strengthening a bond of the cylinder liner to the cast material,
stretching the bonding component over the outer circumferential surface of the cylinder liner,
welding the bonding component to the outer circumferential surface of the cylinder liner via a plurality of weld spots,
positioning the cylinder liner together with the bonding component into a casting mold of the casting material,
filling the casting mold with a light metal alloy thereby producing the engine block while at the same time integrally casting the cylinder liner.

11. The engine block as claimed in claim 9 , wherein the bonding component is composed of steel.

12. The engine block as claimed in claim 9 , wherein the bonding component is stretched over the entire outer circumferential surface of the cylinder liner.

13. The engine block as claimed in claim 9 , wherein the plurality of welded spots respectively define an undercut between the bonding component and the outer circumferential surface to facilitate anchoring the cylinder liner in the cast material.

14. The engine block as claimed in claim 9 , wherein the cast material is composed of a light metal.

15. The cylinder liner as claimed in claim 2 , wherein the cast material is composed of at least one of aluminium and an aluminium alloy.

16. The cylinder liner as claimed in claim 4 , wherein the plurality of welding spots are arranged in an axial direction of the outer circumferential surface.

17. The cylinder liner as claimed in claim 4 , wherein the respective welding spots define at least one linear welding spot line extending in an axial direction of the outer circumferential surface.

18. The cylinder liner as claimed in claim 4 , wherein the plurality of welding spots respectively define an undercut disposed between the bonding component and the outer circumferential surface to facilitate anchoring the cast material at the welded connection.

19. The method as claimed in claim 10 , wherein welding the bonding component to the outer circumferential surface includes forming an undercut at the plurality of weld spots between the bonding component and the outer circumferential surface to facilitate anchoring the cylinder liner in the cast material.

20. The method as claimed in claim 10 , wherein welding the bonding component to the outer circumferential surface includes forming a weld spot line by arranging the plurality of weld spots linearly with respect to one another at least one of along an axial direction of the cylinder liner and obliquely to a longitudinal axis of the cylinder liner.

Assignees

• Mahle Int Gmbh

Inventors

• Bucher Gerhard
• Gaiselmann Stefan
• Maurizi Marco

Classifications

• F02F7/0021

  Construction · CPC title

• B22D19/0009 Primary

  Cylinders, pistons · CPC title

• B22D19/02

  for making reinforced articles (B22D19/14 takes precedence) · CPC title

• F02F2200/00

  Manufacturing · CPC title

• F02F1/004 Primary

  Cylinder liners (F02F1/08, F02F1/16 take precedence) · CPC title