car wire harness on the material requirements are also very strict:
Including its electrical properties, material spatter, temperature resistance, etc., are higher than the general requirements of the wiring harness, especially related to the security aspects: such as the direction of the control system, brake these important components of the wiring harness, more stringent requirements. car wire 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 high-level luxury cars or economic general car, wiring harness is basically the same form, 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 the electromagnetic interference around the circuit, and to exclude electrical short circuit.
The automotive harness is functionally divided into two types of power lines that carry the drive actuator actuators (actuator) 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 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 wires, in addition to considering the electrical performance,car wire harness but also by the physical performance of the vehicle when the constraints, so its wide range of options. For example, the frequent opening / closing of the car on the car and across the body between the wires should be composed of good bending performance of the wire. In the high temperature parts of the use of wire, generally use the insulation and good 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, the general 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 will become more coarse and heavier The This is a big problem to be solved,car wire harness 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.