Engine block for an internal combustion engine of a motor vehicle and method of manufacturing an engine block for an internal combustion engine of a motor vehicle

Patent metadata

Field	Value
Publication number	US-10787989-B2
Application number	US-201716349890-A
Country	US
Kind code	B2
Filing date	Oct 6, 2017
Priority date	Nov 15, 2016
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

An engine block for an internal combustion engine of a motor vehicle has a cylinder within which a piston can be movably accommodated between a top dead center and a bottom dead center and has a cylinder bore, the internal cylinder diameter of which expands in the direction of the bottom dead center. The internal cylinder diameter expands only below the region in which a piston system change takes place during operation of the internal combustion engine. The internal cylinder diameter tapers from the top dead center to the region.

First claim

The invention claimed is:

1. An engine block for an internal combustion engine of a motor vehicle, comprising:
a piston;
a cylinder within which the piston is movably accommodated between a top dead center and a bottom dead center;
wherein the cylinder has a bore and wherein an inner diameter of the bore widens in a direction of the bottom dead center;
wherein the inner diameter only widens below a region in which a change in piston stroke takes place during operation of the internal combustion engine such that below the region a distance is always maintained between the cylinder bore and the piston in a radial direction and wherein the inner diameter tapers from the top dead center to the region.

2. The engine block according to claim 1 , wherein the inner diameter widens to the bottom dead center.

3. The engine block according to claim 1 , wherein the inner diameter widens conically.

4. A method for producing the engine block according to claim 1 , comprising the step of:
machining the bore of the cylinder.

5. The method according to claim 4 , wherein the widened inner diameter is produced by honing.

Assignees

• Daimler Ag

Inventors

• Behr Thomas
• Geiger Klaus
• Grimmer Udo
• Hanschke Tobias
• Hartweg Martin
• Lagemann Volker
• Scheib Harald
• Schiefer Sebastian
• Stroeer Martin
• Tomaschko Silvia

Classifications

• F02F1/18 Primary

  Other cylinders · CPC title

• F16J10/00

  Engine or like cylinders (pressure vessels in general F16J12/00; cylinders for engines or other apparatus of particular kinds, see the appropriate subclasses, e.g. for combustion engines F02F); Features of hollow, e.g. cylindrical, bodies in general · CPC title

• F02F2200/00

  Manufacturing · CPC title

• F02F3/00

  Pistons · CPC title