Rotary fuel pump with pulse modulation

Patent · Tue May 07 04:00:00 EDT 1991

OSTI ID:5100180

Tuckey, C H

This describes improvement in an electrical fuel pump that includes an elongated housing having an inlet and an outlet at axially opposed ends thereof, a d.c. motor including armature means journaled for rotation with the housing between the ends and stator means within the housing surrounding the armature means and magnetically coupled thereto, and pumping means affixed to the armature means and positioned adjacent to the inlet end of the housing for pumping fuel from the inlet through the housing to the outlet and thereby creating a pressure differential across the pumping means tending to urge the pumping means into frictional engagement with the inlet end. The improvement in which the stator means has a greater dimension axially of the housing toward the outlet end than toward the inlet end with respect to the armature means, thereby being effectively offset within the housing toward the outlet and magnetically attracting the armature axially of the housing toward the outlet so as to at least partially counterbalance the pressure differential across the pumping means.

• Assignee: Walbro Corp., Cass City, MI (USA)
• Patent Number(s): A; US 5013221
• Application Number: PPN: US 7-572669
• OSTI ID: 5100180
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
DC SYSTEMS
ELECTRICAL EQUIPMENT
ENERGY SYSTEMS
ENGINES
EQUIPMENT
FUEL SYSTEMS
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
POWER SYSTEMS
PUMPS