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Title: Friction reduction for engine components

Patent ·
OSTI ID:1824009
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The present invention relates to techniques for lowering friction between moving surfaces of, for example, an internal combustion engine. Friction reduction is achieved by adding texture modifications to surfaces that come in contact with each other. Texture modifications that reduce friction in accordance with the present invention include dimples of varying geometries and depths ion the surfaces of components. The present invention also relates to the fabrication technique for applying the texture to the surfaces. In another embodiment, the patterned soft mask is applied onto a large surface (flat or curved including cylindrical rollers surfaces) to be followed by electrochemical etching to imprint the textures onto the component And, in another embodiment, a diamond-like-carbon (DLC) film may be applied to the turbine component to also reduce friction.

Research Organization:
George Washington Univ., Washington, DC (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC26-04NT41817; RDS 41817M3459
Assignee:
The George Washington University (Washington, DC)
Patent Number(s):
11,020,933
Application Number:
16/290,648
OSTI ID:
1824009
Resource Relation:
Patent File Date: 03/01/2019
Country of Publication:
United States
Language:
English

References (12)

Internal combustion engine with localized lubrication control of combustion cylinders patent September 2006
Method of planarizing polycrystalline diamonds, planarized polycrystalline diamonds and products made therefrom patent December 1995
Piston apparatus and methods patent January 2001
Workpiece having a tribologically useable surface and method for producing such a surface patent-application January 2003
Vane-type rotary compressor with rotary sleeve patent March 1987
Diamond composite films for protective coatings on metals and method of formation patent July 1997
Method of making valve guide having textured external surface patent April 2007
Cylinder patent-application November 2010
Hybrid Dimple-And-Void Auxetic Structures With Engineered Patterns For Customized NPR Behavior patent-application September 2018
Relieved and Filled Cylinder Surface patent December 1950
Method of coating a silicon or silicide substrate patent August 2001
Method of Forming an Oxide Coating with Dimples on its Surface patent-application October 2008

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