Apparatus and method to avoid fretting fatigue in an engine block

Patent metadata

Field	Value
Publication number	US-10876496-B2
Application number	US-201916415566-A
Country	US
Kind code	B2
Filing date	May 17, 2019
Priority date	May 17, 2019
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

An apparatus for a motor vehicle engine block made of aluminum includes an insert having a first surface and a second surface spaced apart from the first surface, the first surface being substantially flat, and a plurality of projections extending from the second surface, the plurality of projections being inserted into a portion of the engine block to secure the insert to the portion of the engine block. The first surface of the insert is configured to mate with another component, other than the engine block, made of steel or cast iron to avoid fatigue fretting of the aluminum engine block.

First claim

What is claimed is:

1. An apparatus for a motor vehicle engine block made of aluminum, the apparatus comprising:
an insert having a first surface and a second surface spaced apart from the first surface, the first surface being substantially flat, the second surface being a grooved wavy surface; and
a plurality of projections extending from the second surface, the plurality of projections being inserted into a portion of the engine block to secure the insert to the portion of the engine block,
wherein the first surface of the insert is configured to mate with another component, other than the engine block, made of steel or cast iron to avoid fatigue fretting of the engine block.

2. The apparatus of claim 1 , wherein the insert is made of cast iron.

3. The apparatus of claim 1 , wherein each of the plurality of projections includes a first portion that extends substantially perpendicular to the second surface.

4. The apparatus of claim 3 , wherein each of the plurality of projections includes a second portion that extends substantially perpendicular in one direction to the first portion of the plurality of extensions.

5. The apparatus of claim 3 , wherein each of the plurality of projections includes a second portion that extends substantially perpendicular in two directions to the first portion of the plurality of extensions.

6. The apparatus of claim 1 , wherein each of the plurality of projections has an L-shape.

7. The apparatus of claim 1 , wherein each of the plurality of projections has a T-shape.

8. An apparatus for a motor vehicle engine block made of aluminum, the apparatus comprising:
an insert having a first surface and a second surface spaced apart from the first surface, the first surface being substantially flat and the second surface being a grooved wavy surface, the insert being formed of cast iron; and
a plurality of projections extending from the second surface, the plurality of projections being inserted into a portion of the engine block to secure the insert to the portion of the engine block as the portion of the engine block is being cast,
wherein the first surface of the insert is configured to mate with another component, other than the engine block, made of steel or cast iron to avoid fatigue fretting of the aluminum engine block.

9. The apparatus of claim 8 , wherein each of the plurality of projections has an L-shape.

10. The apparatus of claim 8 , wherein each of the plurality of projections has a T-shape.

11. A method to avoid fretting fatigue in an engine block for a motor vehicle, the method comprising:
placing an insert in a mold, the insert having a first surface and a second surface spaced apart from the first surface, the first surface being substantially flat, the second surface being a grooved wavy surface, a plurality of projections extending from the second surface; and
pouring liquid aluminum into the mold to form a portion of the engine block made of aluminum, the plurality of projections being inserted into the portion of the engine block to secure the insert to the portion of the engine block,
wherein the first surface of the insert is configured to mate with another component, other than the engine block, made of steel or cast iron to avoid fatigue fretting of the engine block.

12. The method of claim 11 , wherein the insert is made of cast iron.

13. The method of claim 11 , wherein each of the plurality of projections has an L-shape.

14. The method of claim 11 , wherein each of the plurality of projections has a T-shape.

15. The method of claim 11 , wherein each of the plurality of projections includes a first portion that extends substantially perpendicular to the second surface.

16. The method of claim 15 , wherein each of the plurality of projections includes a second portion that extends substantially perpendicular in at least one direction to the first portion of the plurality of extensions.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Choudhary Lokesh
• Sela Bala K
• Boone Paul J
• Munikamal Tiruttani

Classifications

• B22D19/00 Primary

  Casting in, on, or around objects which form part of the product (B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00) · CPC title

• F02F7/0085

  Materials for constructing engines or their parts · CPC title

• F02F7/0053

  Crankshaft bearings fitted in the crankcase · CPC title

• F02F7/0021 Primary

  Construction · CPC title

• B22D19/08

  for building-up linings or coverings, e.g. of anti-frictional metal · CPC title