Claims
- 1. A vehicle gas directing component comprising:a substantially plastic duct for directing a gas, said duct having an inner surface; and a plurality of ceramic members partially embedded in said inner surface said plurality of ceramic members forming a substantially non-continuos layer arranged along said inner surface to form a boundary layer between said gas and said inner surface exposed through said substantially non-continuos layer.
- 2. The component as recited in claim 1, wherein said ceramic members are ceramic spheres.
- 3. The component as recited in claim 1, wherein said ceramic members are hollow ceramic spheres.
- 4. The component as recited in claim 1, wherein said ceramic members are of a substantially uniform diameter within a range from 0.75 to 1 inches.
- 5. The component as recited in claim 1, wherein said ceramic members form a substantially non-continuous layer, partially embedded within said inner surface.
- 6. The component as recited in claim 1, wherein said ceramic members include a plurality of grooves.
- 7. The component as recited in claim 1, wherein said component is a vehicle exhaust component.
- 8. The component as recited in claim 1, wherein said component is an exhaust manifold.
- 9. A vehicle exhaust manifold comprising:a substantially plastic duct for directing an exhaust gas, said duct having an inner surface; and a plurality of ceramic members partially embedded in said inner surface, said plurality of ceramic members forming a substantially non-continuos layer arranged along said inner surface in relation to a flow direction of said exhaust gas to form a boundary layer between said gas and said inner surface exposed through said substantially non-continuos layer.
- 10. The component as recited in claim 9, wherein said ceramic members are ceramic spheres.
- 11. The component as recited in claim 9, wherein said ceramic members are hollow ceramic spheres.
- 12. The component as recited in claim 9, wherein said ceramic members are of a substantially uniform diameter within a range from 0.75 to 1 inches.
- 13. A vehicle exhaust manifold comprising:a substantially plastic duct for directing an exhaust gas, said duct having an inner surface; and a plurality of ceramic spheres partially embedded in said inner surface, said plurality of ceramic spheres forming a substantially non-continuos layer arranged along said inner surface in relation to a flow direction of said exhaust gas to form a boundary layer between said gas and said inner surface exposed through said substantially non-continuos layer.
- 14. The component as recited in claim 13, wherein said ceramic spheres are of a substantially uniform diameter within a range from 0.75 to 1 inches.
- 15. The component as recited in claim 13, wherein said ceramic members form a substantially non-continuous layer, partially embedded within said inner surface.
- 16. The component as recited in claim 13, wherein said ceramic members include a plurality of grooves.
Parent Case Info
The present application claims priority to United States Provisional Patent Application Ser. No. 60/141,789, filed Jun. 30, 1999.
US Referenced Citations (15)
Foreign Referenced Citations (1)
Number |
Date |
Country |
60078727 |
May 1985 |
JP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/141789 |
Jun 1999 |
US |