The Function Of The Wiring Harness

Views: 213 Author: Site Editor Publish Time: 2024-03-06 Origin: Site

In modern cars, the electronic control system is closely related to the wiring harness. Someone once used a vivid analogy: the microcomputer is equivalent to the human brain, the sensor is equivalent to the sensory organ, and the executive element is equivalent to the motion device tube, so the wiring harness is the nerve and blood vessel.

Automotive wiring harnesses are divided into functions, there are two types of power lines that carry power to drive the actuators (actuators) and signal lines that transmit sensor input commands. Power lines are thick wires that carry large currents, while signal lines are thin wires that do not carry electricity (optical fiber communication).

The cross-sectional area of wires used in motors and actuators is 0.85 and 1.25mm2, while the cross-sectional areas of wires used in power circuits are 2, 3, and 5mm2; while special circuits (starters, alternators, engine ground wires, etc.) have 8, 10, 15, 20mm2 different specifications. In addition to considering the electrical performance, the selection of wires is also restricted by the physical performance of the vehicle. For example, the frequently opened/closed door of a taxi and the wires that cross the body should be made of wires with good flexibility. In recent years, electromagnetic shielding wires used in weak signal circuits have also been increasing.

With the increase of automobile functions and the widespread application of electronic control technology, the number of circuits and power consumption on automobiles has increased significantly, and the wiring harness has become thicker and heavier. How to make a large number of wiring harnesses more effective and reasonable in the limited car space Arrangement to enable automobile wiring harnesses to exert greater functions has become a problem facing the automobile manufacturing industry.

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