With the development of science and technology,Automotive wiring harnessSome manufacturers say that there are more and more harnesses on cars, and the relationship between electronic control systems and harnesses is very close. Someone added this analogy. If the functions of microcomputers, sensors and executive components are used on the human body, then microcomputers are brain, sensors are sensory organs, executive components are moving organs, and harnesses are blood vessels and nerves.

The main body of the automobile circuit network is the automobile harness, which is mainly used to connect the electrical components of the automobile. If the harness does not exist, the automobile circuit will not exist. At present, the wiring harness of both advanced and economical cars is basically the same. It is composed of connecting plug-ins, wires and wrapping tapes. It not only ensures the transmission of electrical signals, but also ensures the reliability of the connecting circuit. It should be able to provide the electrical and electronic components with the required current value and prevent electromagnetic interference to the surrounding circuits, Besides, it is also necessary to eliminate the electrical short circuit.

According to the functions of automobile harness processing, it can be divided into two types: the power line that carries the power of the driving actuator and the signal line that transmits the sensor input instructions. The power line is mainly used to carry heavy current, while the signal line is a thin wire that does not need to carry power.

The cross-sectional area of wires used for motors and actuators is generally 0.85 and 1.25 mm2; The cross sectional area of the wires used in the power circuit is 2, 3 and 5 square millimeters; The cross sectional area of conductors used in special circuits is 8, 10, 15 and 20 mm2. The larger the cross-sectional area of the wire, the greater the current capacity. The selection of the wire should not only consider the electrical performance, but also consider the limitations of the physical performance of the vehicle, so its optional range is relatively wide.