Specializing in the design and manufacture of automotive motor armatures and stators.

The function of the fuel pump armature

Release Time：

2022-07-18

　　When it comes to the automotive fuel delivery system, the first thing that comes to mind is the fuel pump, because without the fuel pump, fuel cannot be supplied to the engine, and the previous P0087 fault code also mentioned the fuel pump. So Fuel pump armature What exactly does it do? Let me explain.

　　Considering heat dissipation, sound insulation, and air resistance, the current fuel pump armature is built into the fuel tank. Its main function is to draw fuel from the fuel tank, pressurize it and deliver it to the fuel supply pipe, and maintain a certain fuel pressure through the fuel pressure regulator.

　　Generally speaking, the fuel pump armature is actually a fuel pump component, a whole component. It contains multiple components, mainly composed of a filter (fuel filter, oil filter), a fuel pressure regulator, a fuel pump, and a fuel level sensor unit (float).

　　1. Currently, most vehicle fuel pumps are installed in the fuel tank. The electrically driven fuel pump consists of three parts: the pump body, the permanent magnet motor, and the housing.

　　2. Fuel flows through the electric fuel pump, cooling the armature of the permanent magnet motor, also known as a wet fuel pump. The motor part of the electric fuel pump includes a permanent magnet fixed to the housing, an armature that generates electromagnetic torque, and a brush assembly installed on the housing.

　　3. The brushes contact the commutator on the armature, and the leads connect to the terminals on the housing, guiding the voltage that controls the electric fuel pump to the armature windings.

　　4. The additional functions of the fuel pump are performed by the safety valve and the check valve. The safety valve prevents the fuel pipe from rupturing or the fuel pump from being damaged due to excessive pressure when the fuel pipe is blocked. The pressure regulator has the function of regulating and stabilizing pressure, and controls the fuel pressure at around 0.4 MPa (the specific pressure value may vary depending on the engine model). The pressure regulation method is to open the valve when the fuel pressure exceeds the spring pressure of the pressure regulator, allowing the fuel to flow back to the tank, so that the fuel pressure reaches a constant value.

　　The fuel pump armature filter includes an oil filter and a fuel filter, commonly known as a coarse filter and a fine filter, which mainly filter impurities from the fuel. The main function of both is fuel filtration. The structure of the fuel filter consists of an aluminum shell and a stainless steel bracket. A high-efficiency filter paper is installed on the bracket, and the filter paper is in a daisy shape to increase the flow area. Its main function is to remove solid impurities such as iron oxide and dust from the fuel to prevent blockage of the fuel system (especially the injectors). The fuel pump operating time and duration are controlled by the ECU according to the actual vehicle conditions. The fuel pump is directly powered by the battery, and the fuel pump relay controls its on/off. Fuel pump circuit problems are often caused by fuel pump relay failure.

Fuel pump armature

12-01

2022

Starter motor armature manufacturer: What are the characteristics of the armature?

Starter armature manufacturer introduction: Whether it is a DC motor or an AC motor, and regardless of whether the winding is placed on the rotor or stator, it belongs to the armature winding placed in the iron core slot. It is only because of the different connection methods of the winding that different types and characteristics are obtained. In order to strengthen the mechanical fixation of the winding, its effective (straight) part is placed in the slot. But the ending is still an invalid part, only playing a connecting role. The starter armature manufacturer believes that the winding embedded in the slot also brings some problems. First of all, in order to prevent tooth saturation, the air gap magnetic density has to be limited, which limits the utilization coefficient of the motor. Second, the voltage of the motor cannot be too high. Third, the inductance of the coil becomes larger, which is related to the saturation of the iron core. In this way, for electric drive and servo systems, the response speed of the motor becomes slower, and the nonlinearity of the inductance complicates the control system. Therefore, in the development of large steam turbine generators, especially the emergence of superconducting motors, as well as DC motors and control motors, slotless motors have appeared. The starter armature manufacturer believes that slotless DC motors are mainly used for the control of DC traction motors and small DC motors. The iron core of the slotless motor is a cylindrical yoke, which is wound with an insulating layer or fitted with a prefabricated insulating tube. Then, the winding elements are evenly distributed on its surface.

11-21

2022

Starter armature manufacturer: Common sense of armature

The starter armature manufacturer indicates that the winding is the heart of the motor. Different motors, different manufacturers, and different processing technologies will correspond to different winding types. Different winding types are selected according to the specific characteristics to be achieved, requiring simple structure, convenient manufacturing and maintenance, and safe and reliable operation. The armature winding of a DC motor is the same as that of an AC motor. The relationship between the coils should be such that a certain number of conductors produce a large potential difference, saving as much non-ferrous metal and insulating material as possible. However, it also has its unique features: the coils are connected by a commutator, and the connection relationship must ensure good commutation. The starter armature manufacturer indicates that the armature windings of DC motors can be divided into five types: single winding, lap winding, single wave winding, multiple wave winding, and frog winding, i.e., a mixed winding of lap winding and wave winding. In a single lap winding, adjacent elements under the same magnetic pole are connected in series, and the pitch y=yk=1 or -1. When winding this type of winding, any two series-connected elements directly overlap each other, so it is called a lap winding. If y=yk=1, the winding moves to the right, which is called a "right-hand" winding; if y=yk=-1, the winding moves to the left, which is called a "left-hand" winding. Each element of the left-hand winding is connected to two short lines of the commutator, using copper.

11-11

2022

Overview of Automotive Armature

In the process of electromechanical energy conversion in a motor, the automotive armature plays a key and pivotal role. For a generator, it is the component that generates electromotive force. Let's take a detailed look at the automotive armature. The automotive armature is the component in the motor that carries the coil, and the relative movement of the coil and the magnetic field. In a generator, the induced electromotive force is generated in the coil, and the coil rotates under force to generate electricity. In a motor, the energized coil is subjected to Ampere force in the magnetic field, causing it to rotate in the magnetic field. Since the automotive armature plays a very important role, you should know that in fact, part of an AC generator or related equipment can be represented in mechanical or electrical terms. Although clearly separate, note that these two sets of terms are often used interchangeably, or include a combination of mechanical and electrical terms. This can lead to confusion when using composite machines such as brushless AC generators, or when talking between people accustomed to using differently configured machines. Therefore, in most generators, the excitation magnet rotates and is part of the rotor, while the automotive armature is stationary and part of the stator. Motors and generators can be constructed with a stationary armature and rotating magnetic force or a rotating armature and stationary magnetic force. The demagnetization effect of the automotive armature can be...

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