Cover assembly for an internal combustion engine

• US 7,441,533 B1
• Filed: 05/07/2007
• Issued: 10/28/2008
• Est. Priority Date: 05/07/2007
• Status: Expired due to Fees

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations Incorporated (Motors Liquidation Co. GUC Trust)
• Inventors: Miller, Alan S., Bailey, Claude W III
• Primary Examiner(s): KAMEN, NOAH P
• Application Number:
  US11/745,147
• Publication Number:
  US 20080276901A1
• Time in Patent Office: 540 Days
• Field of Search: 123/198.E, 123/90.38, 181/205
• US Class Current: 123/198.00E
• CPC Class Codes: F02F 7/006 Camshaft or pushrod housings

Abstract

A cover assembly is provided, such as a camshaft cover or valve cover, for an internal combustion engine. The cover assembly includes a cover member with a contoured surface. An acoustic barrier member is generally coextensive with the cover member and at least partially approximates the contoured surface. An elastic member is mounted with respect to the acoustic barrier member and spans at least a portion of the acoustic barrier member. A plate member is mounted with respect to the elastic member and is operable to retain the elastic member and the acoustic barrier member with respect to the cover member. The plate member spans substantially the entirety of the elastic member.

Claims

1. A cover assembly for an internal combustion engine, the cover assembly comprising:

a cover member having a contoured surface;

an acoustic barrier member generally coextensive with said cover member and at least partially approximating said contoured surface;

an elastic member operatively mounted to said acoustic barrier member and spanning at least a portion of said acoustic barrier member;

a plate member operatively mounted to said elastic member and operable to retain said elastic member and said acoustic barrier member with respect to said cover member; and

wherein said plate member spans substantially the entirety of said elastic member.

2. The cover assembly of claim 1, further comprising:

at least one post formed on said cover member;

wherein said at least one post extends through at least one hole defined by said acoustic barrier member and at least one hole defined by said elastic member; and

wherein said plate member defines a fastening feature operable to engage said at least one post to retain said elastic member and said acoustic barrier with respect to said cover member.

3. The cover assembly of claim 2, wherein said fastening feature includes a plurality of radially inwardly projecting fingers operable to engage said at least one post.

4. The cover assembly of claim 3, wherein at least one of said plurality of radially inwardly projecting fingers is operable to deform at least a portion of said at least one post thereby retaining said plate member with respect to said cover member.

5. The cover assembly of claim 1, wherein said plate member is formed from metal.

6. The cover assembly of claim 1, wherein at least one of said cover member and said acoustic barrier member is formed from a composite material.

7. The cover assembly of claim 1, wherein said elastic member is formed from rubber.

8. The cover assembly of claim 1, wherein said cover member is a camshaft cover.

9. A cover assembly for an internal combustion engine, the cover assembly comprising:

a cover member;

an acoustic barrier member spanning substantially the entirety of said cover member;

an elastic member mounted with respect to said acoustic barrier member and spanning at least a portion of said acoustic barrier member;

a plate member mounted with respect to said elastic member and operable to retain said elastic member and said acoustic barrier member with respect to said cover member;

wherein said plate member spans substantially the entirety of said elastic member;

at least one post formed on said cover member;

wherein said at least one post extends through at least one hole defined by said acoustic barrier member and at least one hole defined by said elastic member; and

wherein said plate member defines a fastening feature operable to engage said at least one post to retain said elastic member and said acoustic barrier with respect to said cover member.

10. The cover assembly of claim 9, wherein said fastening feature includes a plurality of radially inwardly projecting fingers operable to engage said at least one post.

11. The cover assembly of claim 9, wherein said cover member has a generally contoured surface and wherein said acoustic barrier member at least partially approximates said contoured surface.

12. A camshaft cover for an internal combustion engine, the camshaft cover comprising:

a cover member having a contoured surface and a flange portion;

wherein said flange portion is configured for attachment to the internal combustion engine;

an acoustic barrier member generally coextensive with said cover member and at least partially approximating said contoured surface;

an elastic member mounted with respect to said acoustic barrier member and spanning at least a portion of said acoustic barrier member;

a plate member mounted with respect to said elastic member and operable to retain said elastic member and said acoustic barrier member with respect to said cover member;

wherein said plate member spans substantially the entirety of said elastic member;

at least one post formed on said cover member;

wherein said at least one post extends through at least one hole defined by said acoustic barrier member and at least one hole defined by said elastic member; and

wherein said plate member defines a fastening feature operable to engage said at least one post to retain said elastic member and said acoustic barrier with respect to said cover member.

13. The camshaft cover assembly of claim 12, wherein said fastening feature includes a plurality of radially inwardly projecting fingers operable to engage said at least one post.

14. The camshaft cover assembly of claim 13, wherein at least one of said plurality of radially inwardly projecting fingers is operable to deform at least a portion of said at least one post thereby retaining said plate member with respect to said cover member.

15. The camshaft cover assembly of claim 12, wherein said plate member is formed from metal.

16. The camshaft cover assembly of claim 12, wherein said elastic member is formed from rubber.

17. The camshaft cover assembly of claim 12, wherein at least one of said cover member and said acoustic barrier member is formed from a composite material.