How are automotive wiring harnesses shielded from electromagnetic interference?

Automotive electronic equipment working in the traveling environment is constantly changing on the car, the complexity and variability of the electromagnetic energy composition of the environment means that the system is subjected to a wider range of sources of electromagnetic interference. Automotive wiring harness throughout the car, is the main source of electromagnetic interference within the car, and its own electromagnetic interference from time to time. So how to deal with automotive wiring harness electromagnetic interference is particularly important. Huicheng Yuan wiring harness with its many years of experience in automotive wiring harness processing, that it is necessary to take the following measures: shielding the source of interference with equipment and related wiring harnesses: the main electronic control system in the car using electronic control units, should be shielded shell package. Increase harness filtering: for longer automotive wiring harnesses, in order to reduce conducted and radiated interference, should be added to the harness filtering, more convenient is to socket the appropriate ferrite magnet ring.

Reasonable planning of the wiring harness: automotive wiring harness arrangement so that the small power sensitive circuits close to the signal source, high-power interference circuits close to the load, as far as possible to separate the small power circuits and high-power circuits, reduce the inductive interference between the wiring harness and radiated interference. Improve the grounding of the equipment: good grounding arrangement and improved ground overlap can reduce high frequency impedance. Automotive electronic equipment grounding is mainly close to the car body as well as the harness shielding layer grounding. Reduce the area of the wiring harness to receive interference: automotive wiring harnesses should be designed to minimize the length, minimum impedance and minimum loop area, and it is best to use twisted-pair wires and other power supply methods with small loop area. Increase the distance from the equipment to the source of interference: In the case of unchanged arrangement of interference equipment, remodel the installation position of sensitive components to increase the distance to the source of interference.

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