Unlock instant, AI-driven research and patent intelligence for your innovation.

Friction reduction for engine components

A technology of engines and components, applied in the direction of engine components, machines/engines, mechanical equipment, etc.

Active Publication Date: 2014-01-08
GEORGE WASHINGTON UNIVERSITY
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

those applications typically involve high-speed low-load operating conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Friction reduction for engine components
  • Friction reduction for engine components
  • Friction reduction for engine components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] Surface texturing according to the present invention can utilize texture patterns on surfaces having different shapes, sizes, depths, configurations, and areal densities. Various shapes may include, but are not limited to, circles, ellipses, triangles, parallelograms, and grooves with different depths, edge angles, and several orientation angles relative to the sliding direction. The size of the grooves (pits) can range from a few microns up to hundreds of microns. In some applications, it is advantageous to make multi-level grooves or protrusions to achieve friction reduction in large components such as marine diesel engines. The typical depth of the pits can be in the range of 1 micron to 8 microns. Larger dimples provide high-speed enhanced hydrodynamic lubrication. This allows large surface features to operate efficiently under high speed conditions. The small pits provide additional lifting due to the squeezing of the lubricating oil trapped in the pits. This al...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Depthaaaaaaaaaa
Lengthaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to View More

Abstract

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 textures 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.

Description

[0001] This application claims the priority of Provisional U.S. Application Nos. 61 / 445,503 and 61 / 445,507, both filed on February 22, 2011. The entire disclosures of these two applications are incorporated herein by reference. [0002] The present invention is created under the sub-contract of RDS41817M3459 under the main contract of the Ministry of Energy with the contract number of DOE / NETL DE-AC26-04NT41817-520.01.04 under the government support. The present invention was awarded by Research and Development Solutions, LLC. To George Washington University. The government has certain rights in this invention. Background technique [0003] Due to soaring crude oil prices, energy efficiency in the transportation sector has become particularly important. Therefore, there is a great need for modern engines and drive trains that improve fuel economy and energy efficiency by reducing friction losses at various contact interfaces. The present invention can benefit from improving fuel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F02F1/20
CPCF05C2253/08F02F1/20F05C2253/083Y10T428/24851Y10T428/24355F16C2360/22F16C33/1075B05D5/08B32B3/30C23F1/02
Inventor 斯蒂芬·M·舒杨·静宇飞·莫董云·华明·陈
Owner GEORGE WASHINGTON UNIVERSITY