초록

A modular automotive fuel pump includes lower and upper housings, a motor, a rotary pumping element, and a combination clearance land and flow guide which determines the axial clearance between the pump impeller and the pump housing.

대표청구항 ▼

A modular automotive fuel pump, comprising: a lower housing having a first end with a central, annular, planar sealing surface, an outer mounting annulus which is coplanar with the central sealing surface, and a second end with a fuel inlet; an upper housing having a first end with a central, annula

A modular automotive fuel pump, comprising: a lower housing having a first end with a central, annular, planar sealing surface, an outer mounting annulus which is coplanar with the central sealing surface, and a second end with a fuel inlet; an upper housing having a first end with a central, annular, planar sealing surface, an outer mounting annulus which is coplanar with the central sealing surface, and second end with a fuel outlet; a motor having a shaft extending therefrom; a rotary pumping element, mounted on said motor shaft between said lower and upper housings, comprising a bladed, two-sided disk having a circular, planar sealing surface extending radially outwardly from the center on each side of said disk, with said circular sealing surfaces of the rotary pumping element being parallel to each other and parallel to said annular sealing surfaces of the lower and upper housings; and a combination clearance land and flow guide comprising an annular ring positioned between said lower and upper housings and having a separate annular face in contact with the mounting annulus on the first end of each housing, so as to establish axial clearance spaces between the sealing surfaces of the disk and the corresponding sealing surfaces of the lower and upper housings, with said combination land and guide having a radially inward surface defining a circumferential wall about said pumping element, and with the axial thickness of said combination land and guide being only slightly greater than the axial thickness of said disk, such that the sealing surfaces of the disk and the corresponding sealing surfaces of the lower and upper housings will cooperate to control the flow of fuel through the axial clearance spaces.