Sealed shunt wire for a fluid pump

摘要

A fluid pump includes a hollow housing, an electric motor having an armature with a commutator, a pump section rotationally coupled to the electric motor for receiving fuel at a relatively low pressure through a fuel inlet and pressurizing the fuel to a relatively high pressure, a motor brush is in electrical contact with the commutator and including a shunt wire extending therefrom, and an end cap that closes one end of the housing and defines a high pressure chamber with the housing. The end cap includes a hollow brush tower extending therefrom and defining a brush holder slidably receiving the motor brush therein such that the brush holder defines in part the high pressure chamber. The end cap also includes an aperture with the shunt wire extending therethrough such that the shunt wire is sealed with the aperture to prevent the fuel from passing therethrough.

主权项

1. A fluid pump comprising:
a hollow housing; an electric motor having an armature with a commutator, said electric motor being rotatable about a motor axis with application of an electric current to said commutator; a pump section rotationally coupled to said electric motor for receiving fuel at a relatively low pressure through a fuel inlet and pressurizing said fuel to a relatively high pressure; a motor brush in electrical contact with said commutator and having a shunt wire extending therefrom; and an end cap closing one end of said housing and defining a high pressure chamber with said housing which is occupied by said fuel at said relatively high pressure; said end cap comprising:
a hollow brush tower extending therefrom and defining a brush holder slidably receiving said motor brush therein, said brush holder defining in part said high pressure chamber;an aperture with said shunt wire extending therethrough to allow said shunt wire to exit said end cap to the exterior of said fuel pump, wherein said shunt wire is sealed with said aperture to prevent said fuel from passing through said aperture to the exterior of said fuel pump.