A kind of DC permanent magnet brushless automobile electric fuel pump

Abstract

The invention relates to an electric fuel pump of a direct-current permanent magnet brushless car, which mainly consists of a power supply plug, a fuel injection nozzle, a controller, a bearing block I, a shell body, a stator, a permanent magnet rotor, a fuel pump nozzle, a filter packet, a clamp ring, a turbine, a bearing block II, a screw and a sealing ring; the controller controls the stator which is an ABC three-phase coil to alternately perform electrifying operation periodically to generate a periodic alternant magnetic field to drive the permanent magnet rotor to rotate at high speed and drive the turbine to rotate at high speed at the same time, therefore, the fuel is pumped into the electric fuel pump from a fuel tank by the filter packet and flows through the inner part of the electric fuel pump and finally is pumped out from the fuel pump nozzle, thereby providing stable and reliable fuel flow and pressure to a lower fuel system. The control parameters of the controller are changed according to the real fuel consumption of the car. The electric fuel pump of the direct-current permanent magnet brushless car has no abrasion to an electric brush, has high reliability and low power consumption, does not need electrical excitation, is maintenance-free, anti-corrosion and has high fuel injection pressure.

Description

technical field [0001] The invention belongs to the technical field of automobile fuel supply systems, in particular to a DC permanent magnet brushless electric fuel pump for automobiles. Background technique [0002] The electric fuel pump is an important part of the automobile fuel supply system. Its function is to pump the fuel out of the fuel tank and supply it to each cylinder of the engine through the fuel injector. The quality of the electric fuel pump directly affects the performance of the vehicle. [0003] For a long time, electric fuel pumps have used brushed DC motors as their power devices. Although brushed DC motors have the advantages of high operating efficiency and good speed regulation performance, due to the use of brush commutator structures, commutation is performed mechanically. However, there are inevitably fatal weaknesses such as noise, sparks, radio interference, and short life, coupled with shortcomings such as high manufacturing costs and difficu...

AI Technical Summary

Problems solved by technology

[0003] For a long time, electric fuel pumps have used brushed DC motors as their power devices. Although brushed DC motors have the advantages of high operating efficiency and good speed regulation performance, due to the use of brush commutator structures, commutation is performed mechanically. , there are inevitably fatal weaknesses such as noise, sparks, radio interference, and short life, coupled with shortcomings such as high manufacturing costs and difficult maintenance, which greatly limit its application range

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