Liquid filtration media containing melt-blown fibers

a technology of melt-blown fibers and filtration media, which is applied in the direction of filtration separation, machine/engine, separation process, etc., can solve the problems of damage to the engine, unacceptable particle levels passing through the filter media, and detrimental to engine performance, so as to reduce fouling and widen the pore size distribution

US20140326661A1Inactive Publication Date: 2014-11-06DONALDSON CO INC
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Patent Information

Authority / Receiving Office
US · United States
Current Assignee / Owner
Publication Date
2014-11-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

A filter and filter media configured and arranged for placement in a fuel stream is disclosed. The filter and filter media allow for filtering of liquid fuels, such as diesel fuel. In certain embodiments the filter media includes a media fiber, such as melt blown polyester; and a scaffold fiber, also such as such as melt blown polyester, having a larger diameter than the media fiber. The media and scaffold fibers combine to create a media structure having low solidity and relatively low compressibility, and which contain a pore structure that avoids premature fouling of the filter by fuel degradation products.
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Description

[0001] This application is being filed as a PCT International Patent application on Aug. 9, 2012, in the name of Donaldson Company, Inc., a U.S. national corporation, applicant for the designation of all countries except the U.S., and Mike J. Madsen, a U.S. Citizen, and Brian Babcock, a U.S. Citizen, applicants for the designation of the U.S. only, and claims priority to U.S. Provisional Patent Application Ser. No. 61 / 523,068, filed Aug. 12, 2011; the contents of which are herein incorporated by reference.FIELD OF THE INVENTION

[0002] The present invention is directed to filtration media, filter elements, and methods of filtering liquid fuels. In particular, the invention is directed to filtration media for the removal of fuel degradation products (FDPs) and other contaminants from liquid fuels.BACKGROUND

[0003] Liquid fuels, such as diesel fuel, are used in internal combustion engines of various configurations and sizes. Such fuels must generally be filtered so as to remove particulate ...

Examples

Embodiment Construction

[0035]The present invention is directed in part to filter media and filter elements for the removal of contaminant material from a liquid fuel stream. The filter elements and media are configured for removal of additional contaminants besides hard particles, these additional contaminants including (for example) waxes, asphaltenes, sterol glucosides, steryl glucosides, sterol glycosides, and fuel degradation products—collectively referred to as fuel contamination products. The filter elements and media allow for improved filter performance and longevity.

[0036]Although existing fuel filtration media can perform adequately in removing particulate contaminants from liquid fuels, the existing media can prematurely foul by buildup of contaminants other than traditional particulates. This premature fouling appears to be particularly pronounced in situations where fuel undergoes repeated heating and cooling cycles, such as in common rail systems used on many diesel engines.

[0037]FIG. 1 is a...