Introduction of car wire harness
In modern cars, car wiring harness particularly large, electronic control system and wiring harness is closely related. Someone has played an image of the metaphor: If the computer, the function of the sensor and the implementation of components with the human metaphor, it can be said that the computer is equivalent to the human brain, the sensor is equivalent to the sensory organs, the implementation of components equivalent to the movement tube, then the harness is the nerve And blood vessels.
Automotive wiring harness is the main body of the car circuit, connecting the electrical and electronic components of the car and making it function, there is no wiring harness does not exist in the car circuit. At present, whether it is a luxury car or an economy ordinary car,car wire harness the form of wiring harness is basically the same, are composed of wires, connectors and wrapping tape, it is necessary to ensure that the transmission of electrical signals, but also to ensure that the connection circuit The reliability of the supply of electrical and electronic components to the provisions of the current value to prevent electromagnetic interference to the surrounding circuit, and to exclude electrical short circuit.
The car harness is functionally divided into two types of power lines that carry the drive actuator actuators (actuators) and the signal lines that carry the sensor input commands. The power line is a thick wire that carries a large current, and the signal line is a fine wire (optical fiber communication) that does not carry electricity. For example, the signal circuit has a conductor cross-section of 0.3 and 0.5 mm2.
In the motor, the implementation of the conductor with a cross-sectional area of 0.85,1.25 mm2, and the power supply circuit with a cross-sectional area of 2,3,5 mm2; and special circuits (starter, alternator, engine ground, etc.) 10,15,20 mm2 different specifications. The larger the cross-sectional area of the wire, the greater the current capacity. The choice of wire, in addition to considering the electrical performance, but also by the physical performance of the vehicle when the constraints, so its wide range of options. For example, a frequent open / close door on a taxi and a wire across the body should be made of a wire with good flexing performance. In the high temperature parts of the use of wire, generally use the insulation and heat resistance of vinyl chloride, polyethylene coated wire. In recent years, weak signal circuit using electromagnetic shielding lines are also increasing.
With the increase in the function of the car,car wire harness the universal application of electronic control technology, more and more electrical parts, the wire will be more and more cars on the number of circuits and electricity significantly increased, the wiring harness becomes thicker and heavier The This is a big problem to be solved, how to make a large number of wiring harness in a limited car space how to more effectively rational layout, the car harness to play a greater function, has become a car manufacturing industry problems.