Oil supply element and piston of an internal combustion engine

Patent metadata

Field	Value
Publication number	US-11085353-B2
Application number	US-201916691586-A
Country	US
Kind code	B2
Filing date	Nov 21, 2019
Priority date	Nov 23, 2018
Publication date	Aug 10, 2021
Grant date	Aug 10, 2021

Abstract

An oil supply element for supplying oil into a cooling channel of a piston in an internal combustion engine, may include a channel having a lateral opening with an oil discharge element and may be configured to direct a partial oil flow via the oil discharge element and the lateral opening to at least one of an underside of a piston crown, a hub, and a piston interior.

First claim

The invention claimed is:

1. An oil supply element for supplying oil into a cooling channel of a piston in an internal combustion engine, comprising:
a body defining a channel having a lateral opening;
the body including an elongated, circumferentially extending slit that defines the lateral opening of the channel; and
the body further including an oil discharge element configured to direct a partial oil flow and through the lateral opening to at least one of an underside of a piston crown, a hub, and a piston interior.

2. The oil supply element according to claim 1 , wherein the body includes a flared portion defining an inlet funnel.

3. The oil supply element according to claim 2 , wherein the body has a diameter of approximately 4 mm in a region of the channel and a diameter of approximately 10 mm at the inlet funnel.

4. The oil supply element according to claim 1 , wherein the body is structured as an integral sheet-metal part.

5. The oil supply element according to claim 1 , wherein the oil discharge element projects from the body into the channel and is structured as an inwardly pressed pocket.

6. A piston, comprising:
a cooling channel;
a combustion recess;
a piston skirt extending around and at least partially defining a piston interior;
a piston crown disposed between and separating the combustion recess from the piston interior;
a hub disposed in the piston skirt; and
an oil supply element including a channel having a lateral opening with an oil discharge element, the oil supply element configured to direct a partial oil flow via the oil discharge element and the lateral opening to at least one of an underside of the piston crown, the hub, and the piston interior;
wherein the oil supply element is arranged such that oil injected into the oil supply element is partially directed into the cooling channel and partially directed to at least one of the underside of the piston crown, the hub, and the piston interior.

7. The piston according to claim 6 , further comprising a cooling channel cover, wherein the oil supply element is coupled to the cooling channel cover.

8. The piston according to claim 6 , wherein the cooling channel includes at least one of an inlet bore and a supply opening into which the oil supply element projects, wherein the oil supply element is connected in at least one of (i) a region of the at least one of the inlet bore and the supply opening and (ii) in a region of a shaft wall of the piston.

9. An internal combustion engine, comprising:
an oil injection nozzle; and
a piston including:
a cooling channel;
a combustion recess;
a piston skirt extending around and at least partially defining a piston interior;
a piston crown disposed between and separating the combustion recess from the piston interior;
a hub disposed in the piston skirt; and
an oil supply element including a channel having a lateral opening with an oil discharge element, the oil supply element configured to direct a partial oil flow via the oil discharge element and the lateral opening to at least one of an underside of the piston crown, the hub, and the piston interior;

wherein the oil supply element is arranged such that oil injected into the oil supply element is partially directed into the cooling channel and partially directed to at least one of the underside of the piston crown, the hub, and the piston interior; and
wherein the oil injection nozzle is structured and arranged to inject oil into the oil supply element.

10. The internal combustion engine according to claim 9 , wherein the oil supply element further includes an inlet funnel.

11. The oil supply element according to claim 1 , wherein:
the body further includes a tubular wall defining the channel;
the tubular wall includes a bent portion that projects into the channel; and
the oil discharge element is defined by the bent portion of the tubular wall.

12. The oil supply element according to claim 11 , wherein the body is structured as a sheet-metal body.

13. The oil supply element according to claim 11 , wherein a first end of the body is structured as an intake funnel having a larger diameter than a second end of the body disposed opposite the first end.

14. The oil supply element according to claim 13 , further comprising a plurality of wings configured to engage a cooling channel cover, wherein the plurality of wings are disposed on the body between the lateral opening and the second end of the body.

15. The oil supply element according to claim 13 , wherein a distance the oil discharge element protrudes into the channel decreases in a direction extending from the first end of the body to the second end of the body.

16. The oil supply element according to claim 1 , wherein the body further includes:
a tubular portion that delimits the channel; and
a pressed-in portion that projects from the tubular portion into the channel and defines the oil discharge element.

17. The oil supply element according to claim 1 , wherein:
the body further includes a tubular wall delimiting the channel;
the slit is disposed in the tubular wall;
a portion of the tubular wall that defines an edge of the slit is bent inwardly and projects into the channel; and
the oil discharge element is defined by the bent portion of the tubular wall.

18. The oil supply element according to claim 1 , further comprising a plurality of wings disposed on the body and configured to engage a cooling channel cover.

19. The piston according to claim 6 , wherein:
a portion of the oil supply element is disposed within the cooling channel and another portion of the oil supply element is disposed within the piston interior; and
the lateral opening of the oil supply element is disposed in the piston interior.

20. The piston according to claim 6 , further comprising a cooling channel cover, wherein:
the cooling channel opens into the piston interior;
the cooling channel cover is disposed between the cooling channel and the piston interior and closes the cooling channel; and
the oil supply element includes a plurality of wings via which the oil supply element is coupled to the cooling channel cover.

Assignees

• Mahle Int Gmbh

Inventors

• Scharp Rainer

Classifications

• F02F3/22 Primary

  the fluid being liquid · CPC title

• F01P3/06

  Arrangements for cooling pistons · CPC title

• F01P3/10 Primary

  Cooling by flow of coolant through pistons · CPC title

• F01P2003/006

  the liquid being oil · CPC title