What is the function of an automotive wiring harness?

Automotive wiring harnesses are functionally divided into two types: the power line that carries the power to drive the actuator (actuator) and the signal line that transmits the sensor input commands. Power line is a thick wire to transport large currents, while the signal line is not carrying power of the thin wire (fiber optic communication); for example, the signal circuit with a wire cross-sectional area of 0.3, 0.5mm2. In the motor, the executive element with a wire cross-sectional area of 0.85, 1.25mm2, while the power circuit with a wire cross-sectional area of 2, 3, 5mm2; and special circuits (starter, alternator, engine) are 8, 10, 10, 10mm2. The special circuit (starter, alternator, engine grounding wire, etc.) are 8, 10, 15, 20mm2 different specifications. The larger the cross-sectional area of the wire, the larger the current capacity. Wire selection, in addition to considering the electrical properties, but also by the vehicle when the physical properties of the constraints, so its choice of a wide range. For example, the wires between the frequently opened/closed doors and across the body of a rental car should consist of wires with good flexural properties. For wires used in high-temperature areas, vinyl chloride and polyethylene-coated wires with good insulation and heat resistance are generally used. In recent years, the use of electromagnetically shielded wires for weak signal circuits has also increased. As the functions of automobiles increase and electronic control technology is commonly used, there are more and more electrical parts and more wires, and the number of circuits and the amount of electricity used in automobiles increases significantly, and the wiring harnesses become thicker and heavier. This is a big problem that needs to be solved, how to make a large number of harnesses in the limited space of the car how to be more effective and reasonable layout, so that the automotive wiring harness to play a greater function, which will become the future of automotive wiring harness manufacturers to carry out technological research, innovation, a new trend.

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