Piston

Patent metadata

Field	Value
Publication number	US-11098675-B2
Application number	US-202017010794-A
Country	US
Kind code	B2
Filing date	Sep 2, 2020
Priority date	Sep 3, 2019
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

A piston for an internal combustion engine may include a cooling duct having at least one feed opening. The piston may also include a feed funnel arranged within the at least one feed opening. The feed funnel may be fixed in the at least one feed opening via a blind rivet connection.

First claim

The invention claimed is:

1. A piston for an internal combustion engine, comprising:
a cooling duct having at least one feed opening;
a feed funnel arranged within the at least one feed opening; and
wherein the feed funnel is fixed in the at least one feed opening via a blind rivet connection.

2. The piston according to claim 1 , wherein at least one of:
the at least one feed opening is configured as a bore; and
the cooling duct is closed via a cooling duct covering, and the at least one feed opening is configured as a through opening in the cooling duct covering.

3. The piston according to claim 1 , wherein:
the cooling duct is closed via a two-piece cooling duct covering having a first cooling duct covering part and a second cooling duct covering part; and
the at least one feed opening is disposed at a joint between the first cooling duct covering part and the second cooling duct covering part.

4. The piston according to claim 1 , wherein:
the blind rivet connection is configured as a blind rivet nut connection; and
the feed funnel includes:
an annular collar;
a funnel;
an internal thread disposed at an end of the feed funnel that faces away from the funnel; and
a first upset region disposed between the internal thread and the annular collar.

5. The piston according to claim 1 , wherein:
the blind rivet connection is configured as a blind rivet nut connection; and
the feed funnel includes:
a funnel;
an internal thread disposed at an end of the feed funnel that faces away from the funnel; and
a first upset region and a second upset region disposed between the funnel and the internal thread.

6. The piston according to claim 1 , wherein the feed funnel has at least one of:
an axial length of 10 mm to 35 mm; and
a funnel length of 6 mm to 16 mm.

7. The piston according to claim 1 , wherein the feed funnel has at least one of:
a maximum diameter of 10 mm to 14 mm; and
a standpipe internal diameter of approximately 2 mm to 8 mm.

8. A feed funnel of a piston, wherein the feed funnel is configured as at least one of a blind rivet and a blind rivet nut.

9. The feed funnel according to claim 8 , comprising:
a funnel;
an internal thread disposed at an end facing away from the funnel;
a first upset region disposed between the internal thread and the funnel;
at least one of (i) an annular collar and (ii) a second upset region disposed between the funnel and the first upset region; and
wherein the at least one of the blind rivet and the blind rivet nut includes the blind rivet nut.

10. The feed funnel according to claim 9 , wherein the feed funnel has at least one of:
an axial length of 10 mm to 35 mm; and
a funnel length of 6 mm to 16 mm.

11. The feed funnel according to claim 9 , wherein the feed funnel has at least one of:
a maximum diameter of 10 mm to 14 mm; and
a standpipe internal diameter of approximately 2 mm to 8 mm.

12. A method for mounting a feed funnel in a piston comprising:
plugging an end of the feed funnel, which faces away from a funnel of the feed funnel, into a feed opening of a cooling duct of the piston; and
fixing the feed funnel in the feed opening via a blind rivet connection.

13. The method according to claim 12 , wherein the blind rivet connection is a blind rivet nut connection.

14. The piston according to claim 1 , wherein the feed funnel includes:
an elongated annular body including a first upset region bulging radially outward therefrom;
a funnel disposed at a first axial end of the annular body; and
an internal thread disposed within the annular body at a second axial end of the annular body.

15. The piston according to claim 14 , wherein:
the feed funnel has an axial length of 10 mm to 35 mm;
the funnel has a funnel axial length of 6 mm to 16 mm;
the annular body has an internal diameter of 2 mm to 8 mm; and
an end of the funnel disposed opposite the annular body has a diameter of 10 mm to 14 mm.

16. The piston according to claim 14 , wherein the feed funnel further includes an annular collar projecting radially outward from the annular body.

17. The piston according to claim 16 , further comprising a cooling duct covering closing the cooling duct, wherein:
the at least one feed opening is configured as a through opening in the cooling duct covering; and
the cooling duct covering is secured axially between the first upset region and the annular collar such that the blind rivet connection is defined by the first upset region and the annular collar.

18. The piston according to claim 14 , wherein the annular body further includes a second upset region bulging radially outward therefrom.

19. The piston according to claim 18 , further comprising a cooling duct covering closing the cooling duct, wherein:
the at least one feed opening is configured as a through opening in the cooling duct covering; and
the cooling duct covering is secured axially between the first upset region and the second upset region such that the blind rivet connection is defined by the first upset region and the second upset region.

20. The piston according to claim 5 , wherein the first upset region and the second upset region of the feed funnel bulge radially outward therefrom.

Assignees

• Mahle Int Gmbh

Inventors

• Schmieder Benjamin
• Wissler Jakob

Classifications

• F02F3/22 Primary

  the fluid being liquid · CPC title

• F01P3/06

  Arrangements for cooling pistons · CPC title