Housing with a bore for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9303585-B2
Application number	US-201414489709-A
Country	US
Kind code	B2
Filing date	Sep 18, 2014
Priority date	Mar 21, 2012
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

A housing for an internal combustion engine is provided with a bore, which is formed by at least two bore sections at a distance from each other. The bore may be a bearing tunnel in a crankcase or a cylinder head of the internal combustion engine. A rotating, machining tool is provided to machine the bore. The tool is introduced into the bore by axial displacement and the bore is used as a counter-bearing for the tool for radially supporting the tool. The counter-bearing is in one piece with the housing.

First claim

What is claimed is:

1. A housing for an internal-combustion engine, comprising:
a bore of the housing, the bore being formed of at least two bore sections arranged at a distance from each other in the housing and, providing a bearing tunnel; and
a counterbearing in one-piece with the housing, the counterbearing being configured at one side of the housing to radially support a rotating machining tool axially inserted into the bore from an opposite side of the housing, wherein
the counterbearing is axially and radially separated from a fastening portion that fastens a crankshaft to the housing.

2. The housing according to claim 1 , wherein the counterbearing is force-fittedly connected with the housing.

3. The housing according to claim 1 , wherein the counterbearing is form-fittingly connected with the housing.

4. The housing according to claim 1 , wherein the counterbearing is bonded with the housing.

5. The housing according to claim 1 , wherein the counterbearing is cast together with the housing.

6. The housing according to claim 1 , wherein the counterbearing is an extension of one of the at least two bore sections.

7. The housing according to claim 1 , wherein the counterbearing is configured as a bore for a radial shaft seal ring.

8. The housing according to claim 7 , wherein the counterbearing has an inside diameter that is smaller than a bore diameter of the at least two bore sections.

9. The housing according to claim 6 , wherein the counterbearing has an inside diameter that is smaller than a bore diameter of the at least two bore sections.

10. The housing according to claim 6 , wherein the bore sections are configured to form one of a crankshaft bearing tunnel, a camshaft bearing tunnel, or an eccentric shaft bearing tunnel.

11. The housing according to claim 8 , wherein the bore sections are configured to form one of a crankshaft bearing tunnel, a camshaft bearing tunnel, or an eccentric shaft bearing tunnel.

12. The apparatus according to claim 9 , wherein the bore sections are configured to form one of a crankshaft bearing tunnel, a camshaft bearing tunnel, or an eccentric shaft bearing tunnel.

13. A method of machining a bore in a housing of an internal combustion engine, the bore being formed of at least two mutually spaced bore sections of the housing forming a bearing tunnel, the method comprising the acts of:
inserting a rotating machining tool into the bore from one side of the housing via an axial displacement of the machining tool;
radially supporting the machining tool in a counterbearing that is formed in one piece with the housing at an opposite side of the housing; and
machining the at least two bore sections via the rotating machining tool while the rotating machining tool is radially supported in the counterbearing, wherein
the counterbearing is axially and radially separated from a fastening portion that fastens a crankshaft to the housing.

14. A housing for an internal-combustion engine, comprising:
a bore of the housing, the bore being formed of at least two separate circular bore sections in the housing, the two separate bore sections defining a bearing tunnel; and
a counterbearing that is formed in one-piece with the housing, the counterbearing being configured on one side of the housing to radially support a cylindrical rotating machining tool that is axially inserted into the bore from an opposite side of the housing, wherein
the counterbearing is axially and radially separated from a fastening portion that fastens a crankshaft to the housing.

Assignees

• Bayerische Motoren Werke Ag

Inventors

• Stross Ludwig
• Huber Thomas

Classifications

• B24B33/02 Primary

  designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes · CPC title

• F02F7/0021 Primary

  Construction · CPC title

• F02F1/24

  Cylinder heads · CPC title

• F05C2201/021

  Aluminium · CPC title

• F02B2075/025

  two · CPC title