Piston for an internal combustion engine

Patent metadata

Field	Value
Publication number	US-9784211-B2
Application number	US-201314415251-A
Country	US
Kind code	B2
Filing date	Jul 18, 2013
Priority date	Jul 18, 2012
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

The present invention relates to a piston ( 10 ) for an internal combustion engine, which has a piston skirt ( 14 ) as well as a piston head ( 13 ) having a circumferential ring belt ( 21 ) and having a circumferential cooling channel ( 24 ) closed off with a closure element ( 26 ), wherein a circumferential recess ( 23 ) is formed between the piston head ( 13 ) and the piston skirt ( 14 ). According to the invention, it is provided that the closure element ( 26 ) consists of at least two subcomponents ( 27, 28 ), that each subcomponent ( 27, 28 ) has a radially oriented base plate ( 29 ) and at least one circumferential collar ( 31 ) oriented axially on the outer edge ( 29 a ) of the base plate ( 29 ), which collar is accommodated in at least one outer fold ( 34 ) that runs underneath the ring belt ( 21 ).

First claim

The invention claimed is:

1. Piston ( 10 ) for an internal combustion engine, which has a piston skirt ( 14 ) as well as a piston head ( 13 ) having a circumferential ring belt ( 21 ) and having a circumferential cooling channel ( 24 ) closed off with a closure element ( 26 ), wherein a circumferential recess ( 23 ) is formed between the piston head ( 13 ) and the piston skirt ( 14 ), wherein the closure element ( 26 ) consists of at least two subcomponents ( 27 , 28 ), wherein each subcomponent ( 27 , 28 ) consists of a base plate ( 29 ) that is oriented horizontally relative to a vertically oriented piston center axis, and at least one circumferential collar ( 31 ) that extends parallel to the piston center axis and perpendicular to the base plate on an outermost portion of the closure element, which collar is accommodated in at least one outer fold ( 34 ) that runs underneath the ring belt ( 21 ).

2. Piston according to claim 1 , wherein the at least one circumferential collar ( 31 ) and/or the at least one base plate ( 29 ) is attached to the piston ( 10 ) by means of welding, gluing or soldering.

3. Piston according to claim 1 , wherein the at least one circumferential collar ( 31 ) is disposed flush with the outer contour of the piston head ( 13 ).

4. Piston according to claim 1 , wherein each subcomponent ( 27 , 28 ) has precisely one continuous circumferential collar ( 31 ).

5. Piston according to claim 1 , wherein at least one oil entry opening and/or oil exit opening ( 32 , 33 ) is provided in at least one base plate ( 29 ).

6. Piston according to claim 5 , wherein the at least one oil entry opening and/or oil exit opening ( 32 , 33 ) is formed in the end regions ( 27 a , 27 b ; 28 a , 28 b ) of two adjacent subcomponents ( 27 , 28 ).

7. Piston according to claim 1 , wherein a free edge ( 29 a ) of the at least one base plate ( 29 ) is disposed at a distance from the piston ( 10 ).

8. Piston according to claim 1 , wherein the closure element ( 26 ) is configured as a sheet-metal component.

9. Piston according to claim 8 , wherein the closure element ( 26 ) is configured as a spring sheet.

10. Piston according to claim 9 , wherein a free edge ( 29 a ) of at least one base plate ( 29 ) lies against the piston ( 10 ) with bias.

Assignees

• Mahle Int Gmbh

Inventors

• Linke Timo

Classifications

• F02F2003/0061

  by welding · CPC title

• F01M1/08

  Lubricating systems characterised by the provision therein of lubricant jetting means · CPC title

• F02F2003/0053

  by soldering · CPC title

• F02B2075/025

  two · CPC title

• F02F3/225 Primary

  the liquid being directed into blind holes · CPC title