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Car wire beam detailed explanation

Posted On:2017-09-15 13:56:52

In modern cars, there are a lot of lines, and the electronic control system is closely related to them. Someone once made an image analogy: If the function of the microcomputer, sensor and actuator is compared to the human body, it can be said that the microcomputer is equivalent to the human brain, the sensor is equivalent to the sensory organ, and the actuator is equivalent to the motor organ, then the wire beam is the nerve. And blood vessels.
The car wire beam is the network body of the car circuit. It connects and functions the electrical and electronic parts of the car. There is no car circuit without a wire beam. At present, whether it is a high-end luxury car or an economical ordinary car, the wiring is basically the same, and it is composed of wires, connectors, and parcel tape. It must ensure both the transmission of electrical signals and the connection. The reliability of the circuit, Supply the specified current value to the electrical and electronic components to prevent electromagnetic interference with the surrounding circuits and eliminate electrical short circuits.
The car wire beam is divided from function, and there are two types of power lines that carry the power of the actuator(actuator) and signal lines that transmit sensor input instructions. The power line is a thick wire that transports large currents, while the signal line is a thin wire(optical fiber communication) that does not carry electricity; For example, the cross-sectional area of the wire used in the signal circuit is 0.3, 0.5 MM2.
The cross-sectional area of wires used in motors and actuators is 0.85, 1.25 MM2, and the cross-sectional area of wires used in power circuits is 2, 3, and 5 MM2; Special circuits(starter, alternator, engine grounding, etc.) have different specifications of 8, 10, 15, and 20 MM2. The larger the cross-sectional area of the wire, the greater the current capacity. The choice of wires, in addition to considering electrical properties, is also limited by the physical properties of the vehicle, so its selection range is wide.
For example, the frequently open/shut doors on a taxi and the wires that cross the body should consist of wires with good bending performance. The conductors used in high temperatures are generally vinyl chloride and polyethylene coated wires with good insulation and heat resistance. In recent years, the electromagnetic shielding wire used in weak signal circuits has also been increasing.
With the increase of automotive functions, the universal application of electronic control technology, more and more electrical parts, more and more wires, the number of circuits and power consumption on the car will increase significantly, and the wire bundles will become thicker and heavier.
This is a big problem that needs to be solved. How to make a large number of wire bundles in the limited car space more effective and reasonable arrangement, so that the car wire bundles play a greater function, has become a problem facing the automotive manufacturing industry.



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