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US 5,401,143 AGranted
Multi-stage automotive fuel pump having angeled fuel transfer passage
AssigneeFord Motor Company
InventorDequan Yu
Life of this patent
Estimating the term…
Abstract
A multi-stage automotive fuel pump includes a casing and motor located within the casing for driving primary and secondary pumping sections, with the primary and secondary pumping sections sharing a common wall which axially separates primary and secondary rotary pumping elements and which houses a fuel transfer for moving fuel from the primary into the secondary pumping sections in a manner which avoids generation of turbulence and cavitation.
Claims9
A multi-stage automotive fuel pump comprising:
- a casing;
- a motor contained within said casing and having a driveshaft extending from said motor;
- a primary pumping section powered by said motor, with said primary pumping section having a regenerative turbine pumping element attached to said driveshaft and contained within a primary pump housing positioned within said casing, and with said primary pump housing having an primary inlet for admitting fuel into the fuel pump;
- a secondary pumping section powered by said motor, with said secondary pumping section having a gerotor pumping element attached to said driveshaft and contained within a secondary pump housing positioned within said casing, with said secondary pump housing having an secondary outlet for discharging pumped fuel from the secondary pumping section;
- and
- fuel transfer means for accepting pumped fuel from the primary pumping section and for transmitting the pumped fuel to the secondary pumping section, with said fuel transfer means comprising a fuel transfer passage extending through a common wall positioned between said primary pump housing and said secondary pump housing, with said fuel transfer passage having a primary outlet for said primary pumping section and a secondary inlet which extends around a circular arc segment of approximately 160.degree. in the direction of rotation of said gerotor for said secondary pumping section, and a center channel extending between said inlet and said outlet at an included angle of 25.degree.-30.degree. to the faces of said rotary pumping elements.
3 more elements
A multi-stage automotive fuel pump comprising:
- a casing;
- a motor contained within said casing and having a driveshaft extending from said motor;
- a primary regenerative turbine pumping section powered by said motor, with said primary pumping section having a primary rotary pumping element attached to said driveshaft and contained within a primary pump housing positioned within said casing;
- a secondary regenerative turbine pumping section powered by said motor, with said secondary pumping section having a secondary rotary pumping element attached to said driveshaft and contained within a secondary pump housing positioned within said casing;
- and
- a fuel transfer means for accepting pumped fuel from the primary pumping section and for transmitting the pumped fuel to the secondary pumping section, with said fuel transfer means comprising a fuel transfer passage extending between said primary pump housing and said secondary pump housing, with said fuel transfer passage having an outlet for said primary pumping section and an inlet for said secondary pumping section and a generally cylindrical center channel extending between said inlet and said outlet at an included angle which is generally acute to the faces of said rotary pumping elements, with said inlet also serving as a pumping channel for the secondary regenerative turbine.
3 more elements
Dependencies are inferred from the claim text.