Internal combustion engine and method for producing a crankcase and/or a cylinder liner for an internal combustion engine

Abstract

The present disclosure relates to an internal combustion engine, in particular a reciprocating internal combustion engine, having at least one cylinder, wherein a cylinder wall of the cylinder is formed at least at a wall region forming a cylinder barrel by a coating of a crankcase or of a cylinder liner of the internal combustion engine by means of a coating material. According to the present disclosure, the coating material is formed of a high-alloy, steel alloy including, as alloying elements, chromium, nickel, copper and niobium.

Claims

1. An internal combustion engine, comprising: at least one cylinder, wherein a cylinder wall of the cylinder is formed at least at a wall region forming a cylinder barrel by a coating of a crankcase or of a cylinder liner of the internal combustion engine by a coating material, wherein the coating material is formed of a high-alloy, steel alloy including as alloying elements, chromium, nickel, copper and niobium, wherein the steel alloy is formed by the steel 1.4542 (DIN EN 10088-3) or by the steel 1.4548 (DIN EN 10088-3), and wherein the coating material is applied by means of atmospheric plasma spraying (APS), wherein the coating material is conveyed in powder form by means of a feed device to a heating region of a heating and spraying device and sprayed onto the crankcase or the cylinder liner, in particular the coating material is injected into a plasma jet of the heating and spraying device in the form of a plasma burner.

2. A vehicle, in particular a commercial vehicle, comprising an internal combustion engine, the internal combustion engine having at least one cylinder, wherein a cylinder wall of the cylinder is formed at least at a wall region forming a cylinder barrel by a coating of a crankcase or of a cylinder liner of the internal combustion engine by a coating material, wherein the coating material is formed of a high-alloy, steel alloy including as alloying elements, chromium, nickel, copper and niobium, wherein the steel alloy is formed by the steel 1.4542 (DIN EN 10088-3) or by the steel 1.4548 (DIN EN 10088-3) and wherein the coating material is applied by means of atmospheric plasma spraying (APS), wherein the coating material is conveyed in powder form by means of a feed device to a heating region of a heating and spraying device and sprayed onto the crankcase or the cylinder liner, in particular the coating material is injected into a plasma jet of the heating and spraying device in the form of a plasma burner.

3. A method for producing a crankcase or a cylinder liner for an internal combustion engine, comprising: applying a coating material by means of atmospheric plasma spraying (APS) to a cylinder wall of the crankcase or the cylinder liner, wherein the coating material is conveyed in powder form by means of a feed device to a heating region of a heating and spraying device and sprayed onto the cylinder wall of the crankcase or the cylinder liner, in particular the coating material is injected into a plasma jet of the heating and spraying device in the form of a plasma burner, and wherein a high-alloy, steel alloy including, as alloying elements, chromium, nickel, copper and niobium is applied as the coating material to the cylinder wall, wherein the steel alloy is formed by the steel 1.4542 (DIN EN 10088-3) or by the steel 1.4548 (DIN EN 10088-3).

4. The method according to claim 3, wherein, after the application of the coating material, a surface formed by the coating material is machined by means of a honing device having a honing tool, in particular a hone.

5. A method of use comprising: providing cylinder barrel of a crankcase or a cylinder liner; and applying by atmospheric plasma spraying (APS) a high-alloy, steel alloy comprising, as alloying elements, chromium, nickel, copper and niobium as coating material for the coating of the cylinder barrel of a crankcase or a cylinder liner, wherein the coating material is conveyed in powder form by means of a feed device to a heating region of a heating and spraying device and sprayed onto the cylinder barrel of the crankcase or the cylinder liner, in particular the coating material is injected into a plasma jet of the heating and spraying device in the form of a plasma burner, and wherein the steel alloy is formed by the steel 1.4542 (DIN EN 10088-3) or by the steel 1.4548 (DIN EN 10088-3).

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) The present disclosure and the advantageous embodiments or developments thereof and also the advantages thereof will be explained in more detail hereinbelow, merely by way of example, with reference to drawings, in which:

(2) FIG. 1 shows a section through a crankcase of an internal combustion engine according to the present disclosure;

(3) FIG. 2 shows a schematic illustration on the basis of which the procedure according to the present disclosure is explained; and

(4) FIG. 3 shows a section through a second embodiment of an internal combustion engine according to the present disclosure.

DETAILED DESCRIPTION

(5) FIG. 1 shows a partial section through a crankcase 1 of an internal combustion engine according to the present disclosure. A cylinder wall 3 of the cylinder 5 shown in said figure is formed here entirely or continuously by a coating material 7 which forms a slide layer 6. As an alternative, it would also be conceivable, however, for the cylinder wall 3 to be coated by means of the coating material 7 only at a cylinder barrel portion 9 of the cylinder 5 or at a part of the cylinder barrel portion 9.

(6) The coating material 7 is formed by a steel alloy comprising, as alloying elements, chromium, nickel, copper and niobium. This coating material 7 is particularly wear-resistant, corrosion-resistant and also simple to machine. Specifically, the steel alloy can be formed, for example, by the steel 1.4542 (DIN EN 10088-3) or by the steel 1.4548 (DIN EN 10088-3).

(7) The slide layer 6 here is applied furthermore directly to a base material 10, formed for example by aluminum, of the crankcase 1. Alternatively, at least one supporting layer or stabilization layer could also be provided between the slide layer 6 and the base material 10 of the crankcase 1, by means of which supporting layer or stabilization layer fracturing of the slide layer 6 by possible plastic deformation of the base material 10 is counteracted.

(8) A procedure according to the present disclosure for producing the crankcase 1 will be explained in more detail hereinbelow with reference to FIG. 2.

(9) FIG. 2 schematically shows part of a coating device 11, by means of which a cylinder wall 13 of the crankcase 1 can be coated with the coating material 7. Here, the coating material 7 is applied to the uncoated cylinder wall 13 of the crankcase 1 by means of a thermal spraying method, here by way of example by atmospheric plasma spraying (APS).

(10) Specifically, the coating material 7 is conveyed here in powder form via a feed line 15 of a plasma burner 17 of the coating device 11 to a heating region 19 of the plasma burner 17, or is injected into the plasma jet of the plasma burner 11. The coating material powder is heated by the high temperature of the plasma and thereby melted. The plasma jet or the plasma stream carries along the molten powder particles, and flings or sprays them onto the cylinder wall 13 of the crankcase 1 which is to be coated.

(11) The plasma burner 17 here therefore forms a heating and spraying device by means of which the coating material 7 can be melted and sprayed, in the molten state, onto the cylinder wall 3 of the crankcase 1. As an alternative to atmospheric plasma spraying, the coating material 7 could also be applied to the cylinder wall 13, for example, by wire arc spraying (WAS).

(12) After the application of the coating material 7 to the cylinder wall 13, a surface formed by the coating material is machined or honed by means of a honing device (not shown in the figures). In this way, the tribological properties of the slide layer 6 of the crankcase 1 which is formed by the coating material 7 are optimized.

(13) FIG. 3 shows a partial section through a second embodiment of an internal combustion engine 21 according to the present disclosure. Here, it is not a crankcase 23 of the internal combustion engine 21 but rather a cylinder liner 27 of the internal combustion engine 21 inserted into a liner recess 25 of the crankcase 23 which forms a cylinder barrel of the internal combustion engine 21. The slide layer 6 composed of the coating material 7 here is therefore not applied to the crankcase 23, but rather to the cylinder liner 27 of the internal combustion engine 21.

LIST OF REFERENCE SIGNS

(14) 1 Crankcase

(15) 3 Cylinder wall

(16) 5 Cylinder

(17) 6 Slide layer

(18) 7 Coating material

(19) 9 Cylinder barrel

(20) 10 Base material

(21) 11 Coating device

(22) 13 Uncoated cylinder wall

(23) 15 Feed line

(24) 17 Plasma burner

(25) 19 Heating region

(26) 21 Internal combustion engine

(27) 23 Cylinder crankcase

(28) 25 Liner recess

(29) 27 Cylinder liner