Abstract:

In order to reduce the intensity of electromagnetic radiation, different suppression measures are applied to the main electromagnetic radiation components of car ignition system. Actual size models of controller and spark plug are established. Simulation is carried out using Finite Element Method (FEM) with multilevel compressed grid methods. The boundary conditions are set according to actual voltage and operating status. The transient electromagnetic field images of the controller and spark plug in ignition are obtained. The impact of the internal structure of the components on the electromagnetic field is analyzed. Improving measures are taken on the designs of circuit and component internal structures, by which the intensity of the electromagnetic radiation is reduced by 16dB. The effectiveness of the design method is verified, which satisfies the state standard of electromagnetic radiation of vehicle components.

Key words: technology of instrument and meter, electromagnetic radiation suppression, finite element method, dualfeedback filter, car's ignition system