Wet cylinder liner for internal combustion engines, process for obtaining a wet cylinder liner, and internal combustion engine

Patent metadata

Field	Value
Publication number	US-10247130-B2
Application number	US-201515519146-A
Country	US
Kind code	B2
Filing date	Oct 16, 2015
Priority date	Oct 16, 2014
Publication date	Apr 2, 2019
Grant date	Apr 2, 2019

Abstract

A wet cylinder liner for internal combustion engines may include a cylindrical body composed of a ferrous alloy having a circumferential outer surface. The cylindrical body may include a first layer and a second layer disposed sequentially on the outer surface. The first layer may include at least one of at least one silicon and at least one two-component epoxy adhesive. The second layer may include a silane-elastomer compound. The silane-elastomer compound may include nanoparticles of silicon oxide and an adhesion modifier additive. The second layer may be configured as an interface between a cooling fluid and the first layer, as well as to resist erosion by cavitation. The first layer may facilitate an interface for resistance at high temperatures.

First claim

The invention claimed is:

1. A wet cylinder liner for an internal combustion engine, comprising: a cylindrical body composed of a ferrous alloy having a circumferential outer surface, a first layer and a second layer disposed sequentially on the outer surface, the second layer configured as an interface between a cooling fluid and the first layer, wherein the first layer is composed of a material including at least one of at least one silicon and at least one two-component epoxy adhesive, and the second layer includes a silane-elastomer compound containing nanoparticles of silicon oxide and an adhesion modifier additive, and wherein the second layer is further configured to resist erosion by cavitation and the first layer facilitates an interface for resistance at high temperatures.

2. The cylinder liner as claimed in claim 1 , wherein the silane-elastomer compound of the second layer is of a polydimethylsiloxane type.

3. The cylinder liner as claimed in claim 1 , wherein the adhesion modifier additive includes at least one of a vinylsilane type, epoxysilane type and aminosilane type.

4. The cylinder liner as claimed in claim 1 , wherein the second layer includes 8% to 22% by volume of silicon oxide nanoparticles.

5. The cylinder liner as claimed in claim 1 , wherein the second layer includes 8% to 9% by volume of adhesion modifier additive.

6. The cylinder liner as claimed in claim 1 , wherein the silicon oxide nanoparticles have a size of 10 nm to 800 nm.

7. The cylinder liner as claimed in claim 1 , wherein the first layer and the second layer have a total thickness of 50 μm to 500 μm.

8. The cylinder liner as claimed in claim 1 , wherein the first layer has a thickness between 5 μm and 50 μm.

9. The cylinder liner as claimed in claim 1 , wherein the first layer is disposed on the outer surface via one of a spraying process and a painting process.

10. The cylinder liner as claimed in claim 1 , wherein the second layer is disposed on an outer surface of the first layer via one of a spraying process and a painting process.

11. A process for producing a wet cylinder liner for an internal combustion engine, comprising: casting a cylindrical body having a circumferential outer surface via centrifugal casting centrifuging and polishing the cylindrical body; blasting the outer surface to be coated; depositing a first layer onto the outer surface, wherein depositing the first layer includes one of: applying a silicon layer via at least one of spraying and painting and maintaining the cylindrical body at ambient temperature for at least 30 minutes;
and applying a two-component epoxy adhesive via spraying and maintaining the cylindrical body at ambient temperature for at least 24 hours; and applying a second layer onto the first layer via at least one of a spraying process and a painting process, the second layer including a silane-elastomer compound containing nanoparticles of silicon oxide and an adhesion modifier additive, and maintaining the liner at one of ambient temperature for at least 24 hours and a temperature of 115° C. for at least 30 minutes.

12. The process as claimed in claim 11 , wherein the first layer and the second layer cover at least 50% of a surface area of the outer surface.

13. An internal combustion engine, comprising: at least one wet cylinder liner as claimed in claim 1 .

14. The internal combustion engine as claimed in claim 13 , wherein the second layer includes said silicon oxide nanoparticles in a range of 8% to 22% by volume.

15. The internal combustion engine as claimed in claim 13 , wherein the second layer includes the adhesion modifier additive in a range of 8% to 9% by volume.

16. The internal combustion engine as claimed in claim 15 , wherein the adhesion modifier additive is at least one of a vinylsilane type, epoxysilane type and aminosilane type.

17. The internal combustion engine as claimed in claim 13 , wherein the silicone oxide nanoparticles have a size ranging from 10 nm to 800 nm.

18. The cylinder liner as claimed in claim 1 , wherein the second layer includes between 16% and 22% silicon oxide nanoparticles by volume.

19. The cylinder liner as claimed in claim 1 , wherein the silicon oxide nanoparticles have a size of between 300 nm and 600 nm.

20. The cylinder liner as claimed in claim 1 , wherein the first layer and the second layer have a total thickness between 150 μm and 300 μm.

Assignees

• Mahle Metal Leve Sa
• Mahle Int Gmbh

Inventors

• Vieira De Morais Paulo Roberto
• Ablas Marques Gisela

Classifications

• F02F2200/06

  Casting · CPC title

• B05D7/582

  all layers being cured or baked together · CPC title

• B05D3/0254

  After-treatment · CPC title

• F02F1/12 Primary

  Preventing corrosion of liquid-swept surfaces · CPC title

• B05D1/12

  Applying particulate materials (B05D1/06, B05D1/10 take precedence) · CPC title