Cooling channel cover and piston provided with a cooling channel cover

Patent metadata

Field	Value
Publication number	US-10041441-B2
Application number	US-201515523286-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Oct 30, 2014
Publication date	Aug 7, 2018
Grant date	Aug 7, 2018

Abstract

An annular cooling channel cover for a piston may include an elastic material body having opposing end faces. At least two opposing end regions may provide a joint gap and at least one feed element for a coolant may be received in at least one opening disposed in the cooling channel cover. The feed element may include an inlet region and an outlet region, and may be held on the cooling channel cover via a clip-on latching connection. Spring clips may be disposed on the inlet region of the feed element, and/or latching elements may be disposed on the outlet region of the feed element. The spring clips may engage one of the end faces and the latching elements may engage the opposing end face. A closure element may engage into the joint gap to close the same.

First claim

The invention claimed is:

1. An annular cooling channel cover for a piston of an internal combustion engine, comprising:
an elastic material annular body having at least two end faces disposed opposite one another, the annular body including at least two end regions disposed opposite one another defining a joint gap and at least one opening;
at least one feed element for cooling fluid having an inlet region and an outlet region, the at least one feed element received in the at least one opening provided in the annular body and held on the the annular body via a clipped-in latching connection;
a closure element;
the at least one opening for receiving at least one feed element provided in at least one end region of the at least two end regions arranged adjacently with respect to the joint gap;
the at least one feed element including at least two spring clips disposed on the inlet region extending radially outward in a circumferential direction of the annular body, and at least two latching elements disposed on the outlet region being elastic radially in the circumferential direction of the annular body;
wherein the at least two latching elements bear against one end face of the at least two end faces and the at least two spring clips bear against the other end face of the at least two end faces, such that one spring clip of the at least two spring clips covers the joint gap; and
wherein the closure element is arranged on the one spring clip and engages into the joint gap to close the joint gap.

2. The cooling channel cover as claimed in claim 1 , wherein the annular body includes two semicircular part covers providing two joint gaps disposed diametrically opposite one another and two openings disposed diametrically opposite one another for respectively receiving one feed element.

3. The cooling channel cover as claimed in claim 1 , wherein the at least two latching elements bear against the one end face with bearing faces and the at least two spring clips bear against the other end face with bearing faces, and wherein the bearing faces of the at least two latching elements have a size that is from 30% to 60% of a size of the bearing faces of the at least two spring clips.

4. The cooling channel cover as claimed in claim 1 , wherein the closure element extends entirely over a width of the one spring clip and closes the joint gap completely.

5. The cooling channel cover as claimed in claim 1 , wherein the inlet region of the at least one feed element is widened in a funnel-shaped manner.

6. The cooling channel cover as claimed in claim 1 , wherein the outlet region of the at least one feed element is configured as a riser.

7. The cooling channel cover as claimed in claim 1 , wherein the at least one feed element has a passage opening with a round cross section.

8. The cooling channel cover as claimed in claim 1 , wherein the at least one feed element has a passage opening, the passage opening having a cross section that is greater in the circumferential direction than in a radial direction of the annular body.

9. The cooling channel cover as claimed in claim 1 , wherein the at least one feed element includes at least one of a plastic material and a metallic material.

10. The cooling channel cover as claimed in claim 1 , wherein the annular body is a spring plate.

11. A piston for an internal combustion engine, comprising:
an annular cooling channel cover of an elastic material having a first end face and a second end face disposed axially opposite the first end face with respect to a piston reciprocating axis, the annular cooling channel cover including a joint gap defined between at least two end regions disposed opposite one another in a circumferential direction of the axis and at least one opening;
at least one feed element for a coolant having an inlet region and an outlet region, the at least one feed element received in the at least one opening provided in the cooling channel cover and held on the cooling channel cover via a clipped-in latching connection;
a closure element;
the at least one opening for receiving at least one feed element disposed in at least one end region of the at least two end regions arranged adjacently with respect to the joint gap;
the at least one feed element including at least two spring clips disposed on the inlet region extending radially outward in the circumferential direction of the axis, and at least two latching elements disposed on the outlet region that are elastic radially in the circumferential direction of the axis;
wherein the at least two latching elements bear against the first end face and the at least two spring clips bear against the second end face such that a first spring clip of the at least two spring clips covers the joint gap; and
wherein the closure element is arranged on the first spring clip and engages into the joint gap to close the joint gap.

12. The piston as claimed in claim 11 , wherein the cooling channel cover includes another joint gap disposed diametrically opposite the joint gap, the at least one opening includes two openings disposed diametrically opposite one another, and the at least one feed element includes two feed elements, and wherein the two feed elements are respectively received in the two openings.

13. The piston as claimed in claim 11 , wherein the inlet region of the at least one feed element includes a funnel-shaped structure.

14. The piston as claimed in claim 11 , wherein the at least one feed element has a tubular shape.

15. The piston as claimed in claim 14 , wherein the at least one feed element defines a passage opening with a round cross section.

16. The piston as claimed in claim 14 , wherein the at least one feed element defines a passage opening having a cross section that is greater in the circumferential direction than in a radial direction of the axis.

17. The piston as claimed in claim 11 , further comprising an annular cooling channel, wherein the cooling channel cover closes the cooling channel.

18. The piston as claimed in claim 17 , wherein the outlet region of the at least one feed element extends into the cooling channel.

19. The piston as claimed in claim 11 , wherein the at least one feed element includes at least one of an elastic material and a metallic material.

20. An annular cooling channel cover for a piston of an internal combustion engine, comprising:
an annular body of an elastic material having a first end face and a second end face disposed axially opposite the first end face with respect to a piston reciprocating axis, the annular body including a joint gap defined between at least two end regions disposed opposite one another in a circumferential direction of the axis and at least one opening disposed in at least one end region of the at least two end regions adjacent to the joint gap;
at least one feed element for a coolant having an inlet region and an outlet region, the at least one feed element received in the at least one opening and held on the annular body via a clipped-in latching connection;
a closure element;
at least two spring clips disposed on the inlet region of the at least one feed element and extending radially outward in the circumferential direction of the axis;
at least two latching elements disposed on the outlet region of the at least one feed element and structured elastic radially in the circumferential direction of the axis;
wherein the at least two latching elements have bearing faces that bear against the first end face and the at least two spring clips having be

Assignees

• Mahle Int Gmbh

Inventors

• Boczek Sascha-Oliver
• Scharp Rainer
• Linke Timo

Classifications

• F02F3/22 Primary

  the fluid being liquid · CPC title

• F01P3/10

  Cooling by flow of coolant through pistons · CPC title