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Performance Requirements of Automobile Electric Fuel Pump

The automobile electric fuel pump is a vital part of the modern automotive system, it is responsible for transporting fuel from the fuel tank to the engine, ensuring its stable operation. Components There are several main parts of the automobile electric fuel pump: Motor Unit 1. Motor Stator: It usually consists of multiple layers of silicon steel sheets stacked together to form one or more motor slots in the motor, within which copper coils are wound. The design of the stator must take into account the uniformity of the magnetic field distribution to reduce torque ripple in the motor. 2. Motor Rotor: It can be a permanent magnet rotor or a wound armature rotor. The permanent magnet rotor uses high-performance permanent magnet materials, such as neodymium iron boron (NdFeB), to provide a stable magnetic field; the armature rotor generates a magnetic field through the flow of electric current, which interacts with the stator’s magnetic field to produce torque. Pump Body 1. Roller-Type Pump Body: It includes cylindrical rollers and a rotor. The rollers press tightly against the inner wall of the pump body under the action of centrifugal force, forming sealed chambers to achieve the intake and delivery of fuel. 2. Vane-Type Pump Body: The vanes on the rotor come into contact with the pump casing as the rotor rotates, forming sealed volumes that transport fuel from low-pressure areas to high-pressure areas. 3. Gerotor Pump Body: Composed of two interlocking gears, the rotation of the gears draws fuel into the intake chamber and then compresses it in the discharge chamber, facilitating the conveyance of fuel. Control Unit The control unit receives signals from the Engine Control Unit (ECU) and adjusts the speed and flow rate of the fuel pump according to the operating state of the engine, ensuring that the fuel supply is synchronized with the engine’s demand.

2024-06-27 17:27

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