Hot Selling Fuel Injector Actuator Control Solenoid Valve 12V Engine Parts

Abstract
The electromagnetic valve (EMV) is a critical control element in modern diesel fuel injection systems, determining the precision and stability of injection timing. Under high-pressure and high-frequency operating conditions, the interaction between thermal effects and magnetic performance significantly influences valve dynamics and reliability. This study establishes a thermal–magnetic coupled simulation model to investigate the influence of temperature rise on electromagnetic characteristics and dynamic response behavior of diesel injector valves.

Using finite element analysis (FEA) and multi-physics coupling techniques, the transient magnetic field, eddy current distribution, and coil temperature evolution were jointly simulated. The model incorporates nonlinear magnetic material properties and temperature-dependent electrical resistivity to accurately represent real operating conditions. Simulation results show that coil temperature increases lead to a notable decrease in magnetic flux density and attraction force. When the temperature rises from 25°C to 150°C, the magnetic attraction force drops by approximately 14%, and the valve response delay increases by 22%.

To mitigate performance degradation, various thermal management strategies were analyzed, including optimized coil winding density, improved core materials with higher Curie temperature, and the introduction of heat-dissipating channels within the housing. The implementation of a copper–graphite hybrid heat path reduced coil temperature rise by 18%, effectively maintaining stable electromagnetic performance during continuous high-speed operation.

Experimental validation using a high-frequency injector test bench confirmed the simulation accuracy. The measured coil temperature, magnetic flux, and actuation timing correlated closely with simulation results, with deviations within ±5%. The proposed thermal–magnetic coupled model thus provides a reliable prediction tool for performance evaluation and design optimization of injector electromagnetic valves.

Keywords: diesel injector, electromagnetic valve, thermal–magnetic coupling, multi-physics simulation, dynamic response, temperature effect