Fuel filter with bypass valve

Details Fuel filter with bypass valve Fuel filter with bypass valve

F - Mech Eng,Light,Heat,Weapons

02

M

F02M 37/22 (2006.01) B01D 35/147 (2006.01) B01D 35/26 (2006.01)

Patent

CA 2440448

A fuel filter (130) includes a housing (132, 133) enclosing a filter element (140) in surrounding relation to a fuel pump (150). A diverter plate (214) assembly supported in the housing (132, 133) in sealing relation with one of the housing portions (132), the pump (150) and the filter element (140), includes a bypass valve (212) with a ball member (256). The bypass valve (212) is normally closed when the pump (150) is operational, and flow passes from the inlet (136), through the filter element (140), and through the pump (150) to the outlet (137). The bypass valve (212) opens when the pump is not operational, and flow passes from the inlet (136) through the filter element (140), and then directly to the outlet (137), bypassing the fuel pump (150). The diverter plate (214) includes a segmented collar (222) that couples the plate (214) to one of the housing portions (132); a lip seal (239) sealing to the pump (150); an outer rim (228) that seals to the housing (132); and an annular flange (238) that seals to the filter element (140).

L'invention concerne un filtre à carburant (130) comprenant un logement (132, 133) qui renferme un élément de filtre (140) entourant une pompe à carburant (150). Un ensemble plaque de dérivation (214) est placé dans ledit logement (132, 133) en relation étanche avec l'une des parties du logement (132), la pompe (150) et l'élément de filtre (140) comprenant une soupape de dérivation (212) associée à un élément de bille (256). Ladite soupape de dérivation (212) est normalement fermée lorsque la pompe (150) est opérationnelle, et à partir d'une entrée (136) un écoulement traverse l'élément de filtre (140) et la pompe (150) et se dirige vers une sortie (137). La soupape de dérivation s'ouvre lorsque la pompe n'est pas opérationnelle, et à partir de ladite entrée (136) un écoulement traverse l'élément de filtre (140), et passe directement vers la sortie (137) sans passer par la pompe à carburant (150). La plaque de dérivation (214) comprend une collerette segmentée (222) qui couple ladite plaque (214) à l'une des parties de logement (132); un joint à lèvre (239) assurant l'étanchéité avec la pompe (150); un rebord extérieur (228) assurant l'étanchéité avec le logement (132); et une bride annulaire (238) assurant l'étanchéité avec l'élément de filtre (140).

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