초록 ▼

The invention pertains to a filter designed for the simultaneous filtration and preheating of the fuel for an internal combustion engine. The filter barrel houses an annular filtering element through which the fuel generally circulates in a radial direction. Heating elements are provided in an axial

The invention pertains to a filter designed for the simultaneous filtration and preheating of the fuel for an internal combustion engine. The filter barrel houses an annular filtering element through which the fuel generally circulates in a radial direction. Heating elements are provided in an axial tube of the barrel housing and inside an external annular chamber of that same barrel. Electrical resistors, for example, may be used as heating elements. The invention is designed to eliminate the paraffin flakes which appear in the fuel oil at low temperatures.

대표청구항 ▼

A fuel filter apparatus for heating fuel and filtering from said fuel particulate contaminants and remaining contaminants heavier than fuel prior to injecting said fuel into a combustion chamber of an internal combustion engine, said fuel filter apparatus comprising: a barrel housing having an upper

A fuel filter apparatus for heating fuel and filtering from said fuel particulate contaminants and remaining contaminants heavier than fuel prior to injecting said fuel into a combustion chamber of an internal combustion engine, said fuel filter apparatus comprising: a barrel housing having an upper end and a lower end; a first chamber in said barrel housing; inlet passage means into said barrel housing at said upper end thereof, said inlet passage means further having an inlet aperture at one end thereof for interconnection with a source of fuel and an outlet aperture at the opposite end thereof opening into said first chamber in said barrel housing; a transparent cover member removably mounted at said lower end of said barrel housing; a collecting chamber formed in said transparent cover member and interposed between said transparent cover member and said first chamber of said barrel housing and communicating with said first chamber; indicator means located in said collecting chamber comprising an indicator member having a specific gravity greater than that of said fuel; means for securing and sealing said transparent cover member to said barrel housing so that said transparent cover member and said barrel housing together define a leakproof assembly; an annular filtering element positioned in said first chamber in said barrel housing, said annular filtering element having one end mounted adjacent to said outlet aperture of said inlet passage means of said barrel housing and further having an opposite end adjacent to said means for securing and sealing said transparent cover member; a vertically disposed central passage in said annular filtering element having a first end and an oppositely disposed second end, said central passage communicating at said first end with said outlet aperture of said inlet passage means of said barrel housing and being sealed at said second end by said means for securing and sealing said transparent cover member such that said annular filtering element divides said first chamber into a first portion comprising said central passage and communicating with said inlet passage means and an outer annular portion external of said annular filtering element and communicating with said collecting chamber whereby fuel flows from said central passage to said outer annular portion through said annular filtering element; an outlet passage means in said barrel housing at said upper end thereof, said outlet passage means further having an inlet aperture at one end thereof opening into said outer annular portion of said first chamber and an outlet aperture at the opposite end thereof, such that said fuel entering said inlet aperture of said inlet passage means flows through said inlet passage means into said central passage of said annular filtering element and through said annular filtering element into said outer annular portion of said first chamber and through said outlet passage means to said outlet aperture thereof, said annular filtering element removing the undesired particulate contaminants from said fuel so that said fuel cleaned by said annular filtering element flows into said outer annular portion of said first chamber; and means for heating said fuel flowing through said fuel filter apparatus, said heating means heating said fuel in said annular portion of said first chamber to melt any paraffin in said fuel, said remaining contaminants heavier than said fuel settling into said collecting chamber, said heated and filtered fuel thereafter flowing through said outlet passage of said outer annular portion of said first chamber.