PISTON OF AN INTERNAL-COMBUSTION ENGINE

• US 20200132016A1
• Filed: 10/28/2019
• Published: 04/30/2020
• Est. Priority Date: 10/29/2018
• Status: Active Grant

• Current Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Original Assignee: Mahle International GmbH (MAHLE-STIFTUNG GmbH)
• Inventors: Licht, Philipp, Scharp, Rainer
• Granted Patent: US 11,111,878 B2
• Time in Patent Office: Days
• CPC Class Codes: F01P 2003/006 the liquid being oil
• CPC Class Codes: F02F 2003/0061 by welding
• CPC Class Codes: F02F 3/0069 the crown and skirt being interconnected by the gudgeon pin
• CPC Class Codes: F02F 3/14 within combustion chambers
• CPC Class Codes: F02F 3/22 the fluid being liquid
• CPC Class Codes: F02F 7/007 Adaptations for cooling

Abstract

A piston of an internal-combustion engine may include a piston head and a piston skirt, a cooling duct circulating in the piston head, a boss for receiving a piston pin, and a feed hopper for supplying cooling oil into the cooling duct. The feed hopper may be fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

Claims

1. A piston of an internal-combustion engine, comprising:

a piston head and a piston skirt;

a cooling duct circulating in the piston head;

a boss for receiving a piston pin; and

a feed hopper for supplying cooling oil into the cooling duct;

wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

2. The piston according to claim 1, wherein the feed hopper is fastened via the retaining lug to an inside of the piston skirt or to the boss.

3. The piston according to claim 1, further comprising a slipper-skirt wall, wherein the feed hopper is fastened via the retaining lug to the slipper-skirt wall.

4. The piston according to claim 1, wherein at least one of:

the retaining lug is L-shaped, with an L-shank extending in a peripheral direction of the piston; and

the retaining lug is integrally formed with the feed hopper.

5. The piston according to claim 1, wherein the cooling duct has a feed aperture through which the feed hopper protrudes.

6. The piston according to claim 1, further comprising a cooling-duct cover that includes a feed aperture through which the feed hopper protrudes.

7. The piston according to claim 6, wherein the feed hopper is not in contact with the cooling-duct cover.

8. The piston according to claim 5, further comprising a sealing element which at least partially closes a gap between the feed hopper and an edge of the feed aperture.

9. The piston according to claim 1, wherein the feed hopper has a diverting device via which cooling oil injected into the feed hopper is diverted in a peripheral direction of the cooling duct.

10. The piston according to claim 1, wherein the feed hopper is a slotted sheet-metal shaped part.

11. An internal-combustion engine comprising at least one piston including:

a piston head and a piston skirt;

a cooling duct circulating in the piston head;

a boss for receiving a piston pin; and

a feed hopper for supplying cooling oil into the cooling duct;

wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.

12. The internal-combustion engine according to claim 11, wherein the feed hopper is fastened via the retaining lug to an inside of the piston skirt or to the boss.

13. The internal-combustion engine according to claim 11, wherein the at least one piston further includes a slipper-skirt wall, and wherein the feed hopper is fastened via the retaining lug to the slipper-skirt wall.

14. The internal-combustion engine according to claim 11, wherein at least one of:

the retaining lug is L-shaped with an L-shank extending in a peripheral direction of the piston; and

the retaining lug is integrally formed with the feed hopper.

15. The internal-combustion engine according to claim 11, wherein the cooling duct has a feed aperture through which the feed hopper protrudes.

16. The internal-combustion engine according to claim 11, wherein the at least one piston further includes a cooling-duct cover that includes a feed aperture through which the feed hopper protrudes.

17. The internal-combustion engine according to claim 16, wherein the feed hopper is not in contact with the cooling-duct cover.

18. The internal-combustion engine according to claim 15, wherein the at least one piston further includes a sealing element which at least partially closes a gap between the feed hopper and an edge of the feed aperture.

19. The internal-combustion engine according to claim 11, wherein the feed hopper has a diverting device via which cooling oil injected into the feed hopper is diverted in a peripheral direction of the cooling duct.

20. A piston of an internal-combustion engine, comprising:

a piston head and a piston skirt;

a cooling duct circulating in the piston head;

a boss for receiving a piston pin; and

a feed hopper for supplying cooling oil into the cooling duct;

wherein the feed hopper is fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure;

wherein the retaining lug is L-shaped with an L-shank extending in a peripheral direction of the piston; and

wherein the cooling duct has a feed aperture through which the feed hopper protrudes.