Harness function

In modern cars, the electronic control system is closely related to the wiring harness. Someone once made a vivid analogy: the microcomputer is equivalent to the human brain, the sensor is equivalent to the sensory organ, the actuator is equivalent to the exercise tube, then the wiring harness is the nerve and blood vessel.

In terms of function, the automobile wiring harness can be divided into two types: the power line that carries the power of the driving actuator (actuator) and the signal line that transmits the input command of the sensor. Power lines are thick wires that carry large currents, while signal lines are thin wires that do not carry power (optical fiber communication).

The cross{{0}}sectional area of the wires used in the motor and actuator is 0.85, 1.25mm2, while the cross-sectional area of the wires used in the power circuit is 2, 3, 5mm2; and the special circuits (starter, alternator, engine grounding wire, 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 wires between the frequently opened/closed doors on a taxi and the wires that span the body should be constructed of wires with good flex properties. In recent years, electromagnetic shielding wires used in weak signal circuits have also been increasing.

With the increase of car functions and the widespread application of electronic control technology, the number of circuits and power consumption on the car have increased significantly, and the wire harness has become thicker and heavier. How to make a large number of wire harnesses more effective and reasonable in the limited car space Layout, so that the automobile wiring harness can play a greater role, has become a problem faced by the automobile manufacturing industry