Hot Sale Fuel Injection 320D Armature Common Rail Fuel Pump Auto Engine Parts

Structure and Materials
The armature of a solenoid valve is usually made of materials with good magnetic conductivity, such as soft iron, silicon steel, etc. These materials have the characteristics of high magnetic permeability and low remanence, can respond quickly to the action of electromagnetic force, and can quickly return to the initial state after the electromagnetic force disappears. Its structure is generally blocky or cylindrical, and the shape and size vary depending on the specific type and application scenario of the solenoid valve. In some small solenoid valves, the armature may be a simple cylindrical iron core; while in large or high-performance solenoid valves, the armature may adopt a more complex structure, such as a design with multiple branches or special shapes, to better adapt to the magnetic field distribution and force transmission requirements.

Working Principle
When the coil of the solenoid valve is energized, a magnetic field is generated. According to Ampere's law, the current passing through the coil will generate a magnetic field around it, and this magnetic field will magnetize the armature. Because the armature is in the magnetic field, it will be affected by the electromagnetic force. According to the principle of electromagnetic induction, the magnetized armature will interact with the magnetic field generated by the coil, generating an attractive force that moves the armature toward the center of the coil. When the coil is de-energized, the magnetic field disappears, and the armature returns to its initial position under the action of the reset spring or other reset mechanism. By controlling the power on and off of the coil, the reciprocating motion of the armature can be achieved, thereby controlling the valve core movement of the solenoid valve to achieve the purpose of opening or closing the valve and controlling the fluid on and off.

Function
Transmitting electromagnetic force: The main function of the armature is to transmit the electromagnetic force generated by the solenoid valve coil to the valve core or other actuators. It is like a bridge, converting electrical energy into mechanical energy, so that the solenoid valve can control the fluid. For example, in the solenoid valve of the fuel injection system, the armature will drive the valve core to move after being acted upon by the electromagnetic force, thereby controlling the injection amount and injection time of the fuel.
Achieving fast response: Since the armature has good magnetic conductivity and low inertia, it can quickly respond to changes in the magnetic field of the coil, so the solenoid valve can be opened and closed quickly. This is very important for some application scenarios that require precise control of fluid flow and on-off time, such as the electronic fuel injection system of automobiles, the hydraulic control system in industrial automation, etc., which can improve the control accuracy and response speed of the system.

Common faults and effects
Armature stuck: If there are impurities or burrs on the surface of the armature or foreign matter enters the inside of the solenoid valve, the armature may be stuck during movement. The armature stuck will make the solenoid valve unable to open or close normally, affecting the operation of the entire system. For example, in the fuel injection system of a car, if the solenoid valve armature is stuck, it may cause poor fuel injection, causing the engine to shake, power reduction or even failure to start.
Armature wear: Long-term and frequent movements will cause friction between the armature and other components (such as the iron core, guide sleeve, etc.), resulting in armature wear. Armature wear will change the matching gap between it and the coil, affect the transmission efficiency of the electromagnetic force, slow down the response speed of the solenoid valve, and reduce the suction force. This may cause the control accuracy of the solenoid valve to decrease, and it is impossible to accurately control the flow and on-off of the fluid, affecting the performance and stability of the system.
Armature magnetism weakening: If the armature is in a high temperature environment for a long time or is disturbed by an external strong magnetic field, it may cause its magnetism to weaken. The weakened magnetism will reduce the electromagnetic force on the armature, thereby affecting the normal operation of the solenoid valve. For example, in some high-temperature industrial environments, the solenoid valve may not be able to open or close the valve within the specified time due to the weakened armature magnetism, resulting in deviations in fluid control and affecting the normal progress of the production process.

Maintenance and care
Keep clean: Regularly clean the dust and impurities inside the solenoid valve and on the surface of the armature to prevent them from entering the gap between the armature and other parts to avoid jamming and wear. Clean compressed air or special cleaning agents can be used for cleaning, but be careful to avoid corrosion of the armature and other parts by the cleaning agent.
Check the installation and connection: Make sure that the solenoid valve is firmly installed and the armature is tightly connected to other parts without looseness. Loose connections may cause vibration and collision of the armature during movement, accelerating wear. At the same time, check whether the moving parts of the armature are sufficiently lubricated, and add an appropriate amount of lubricating oil if necessary to reduce friction.
Avoid high temperature and strong magnetic field environment: Try to avoid the solenoid valve being in a high temperature environment for a long time. If it cannot be avoided, effective heat dissipation measures should be taken. At the same time, avoid the solenoid valve near a strong magnetic field source to prevent the magnetism of the armature from being disturbed and affected. For solenoid valves working in special environments, products with special properties such as high temperature resistance and anti-magnetic interference can be selected.