Fuel supply unit
AssigneeRobert Bosch GmbH
InventorsKlaus Dobler, Michael Huebel, Willi Strohl
Life of this patent
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Abstract
A feed unit for fuel, has a pump chamber (14) and an impeller (16) disposed in the pump chamber, an electric motor (12) driving the impeller (16), the electric motor (13) with a rotor formed as the impeller (16) of the feed pump (11), in order to achieve an extremely flat design in the axial direction.
Claims8
A feed unit for fuel, having a side channel feed pump, which has a pump chamber (14) embodied in a housing (13) and an impeller (16) disposed in the pump chamber (14), and having an electric motor (12) driving the impeller (16), the electric motor having an armature winding (32) and permanent magnets (30) as well as a stator (28) and rotor (29) respectively receiving said armature winding and said permanent magnets, characterized in that the electric motor (12) is a brushless motor, and its rotor (29) is formed by the impeller (16) of the feed pump (11), wherein said pump chamber being defined in an axial direction by two radially extending, axially spaced-apart side walls, each of said side walls having a slotlike side channel open toward said pump chamber, said impeller having a plurality of circumferentially spaced-apart radial impeller vanes facing said side channels in said side walls.
A feed unit for fuel, having a side channel feed pump, which has a pump chamber (14) embodied in a housing (13) and an impeller (16) disposed in the pump chamber (14), and having an electric motor (12) driving the impeller (16), the electric motor having an armature winding (32) and permanent magnets (30) as well as a stator (28) and rotor (29) respectively receiving said armature winding and said permanent magnets, characterized in that the electric motor (12) is a brushless motor, and its rotor (29) is formed by the impeller (16) of the feed pump (11), characterized in that the cylindrical pump chamber (14) is bound by two radially extending, axially spaced-apart side walls (141,142) and a peripheral wall (143) joining the side walls (141, 142) to one another along their circular periphery;
- that the impeller (16) faces each of the side walls (141, 142) with a gap spacing;
- and that an internal annular surface of the stator (28), formed by a slotted lamination packet (31) forms the peripheral wall (143) of the pump chamber (14).
Dependencies are inferred from the claim text.