Automobile wiring harness refers to the components formed by copper punching contact terminal (connector) and wire and cable crimping, outside plastic pressure insulator or applied metal shell, etc., to form a connecting circuit with wire harness strapping. In modern automobiles, there are many automobile wiring bundles, and the electronic control system is closely related to the wiring harness.

Automobile wiring Harness is the network main body of automobile circuit, which connects the electrical and electronic parts of automobile and makes it function, and there is no automobile circuit without wire harness. At present, whether it is high-luxury cars or economical ordinary cars, the form of wire harness is basically the same, are composed of wires, connectors and wrapping tape, it should not only ensure the transmission of electrical signals, but also to ensure the reliability of the connection circuit, the supply of electrical and electronic components to the specified current value, to prevent electromagnetic interference with the surrounding circuit, And to rule out electrical short circuit.

The automobile wiring harness is divided from the function, and there are two lines of the line and the transmission sensor input instruction which carry the power of the actuator. The power line is a coarse wire that transports large currents, and the signal cable is a fine wire optical fiber communication that does not carry electricity, for example, the wire cross-sectional area used for signal circuits is 0.3 and 0.5mm2. The choice of wire, in addition to considering electrical performance, but also subject to the physical performance of the car, so its choice of a wide range. Double-walled heat shrinkable tube for all kinds of automobiles, aircraft, air conditioners and other household appliances wiring.

Wire Harness Special semi-hard double-walled tube by semi-hard, flame-retardant polyolefin and Hot melt Adhesive co-extrusion, in addition to providing ordinary double-walled tube insulation, anti-corrosion, wear-resistant and other advantages, the inner layer has low melting point, waterproof seal and mechanical strain cushioning performance and other advantages. Used in the car wiring harness branch of the waterproof seal fixed, wire and cable repair and so on.

Tubing special double-walled tubes are used to protect the environmental damage of automobile metal piping and fuel pipelines, and specially designed heat shrinkable tubes effectively prevent damage caused by vibration, friction and corrosion, and improve the reliability of pipelines.

如何为汽车线束及胶管提供保护？

 汽车线束是指由铜材冲制而成的接触件端子(连接器)与电线电缆压接后，外面再塑压绝缘体或外加金属壳体等，以线束捆扎形成连接电路的组件。在现代汽车上，汽车线束特别多，电子控制系统与线束有着密切关系。

汽车线束是汽车电路的网络主体，连接汽车的电气电子部件并使之发挥功能，没有线束也就不存在汽车电路。在目前，不管是高级豪华汽车还是经济型普通汽车，线束编成的形式基本上是一样的，都是由电线、联插件和包裹胶带组成，它既要确保传送电信号，也要保证连接电路的可靠性，向电子电气部件供应规定的电流值，防止对周围电路的电磁干扰，并要排除电器短路。

汽车线束从功能上来分，有运载驱动执行元件作动器电力的电力线和传递传感器输入指令的信号线二种。电力线是运送大电流的粗电线，而信号线是不运载电力的细电线光纤维通信;例如信号电路用的导线截面积为0.3、0.5mm2。电线的选择，除了考虑电气性能外，还要受到车载时物理性能的制约，因此其选择范围很广。 双壁热缩管用于各类汽车、飞机、空调等家用电器的配线等。

线束专用半硬双壁管由半硬、阻燃聚烯烃和热熔胶共挤制成，除可提供普通双壁管的绝缘、防腐、耐磨等优点外，内层具有低熔点、防水密封和机械应变缓冲性能等优点。应用于汽车线束分支处的防水密封固定，电线电缆的修补等。

油管专用双壁管用于防护汽车金属管路及燃料管线等的环境损害而特殊设计的热缩管，有效防止由于震动、摩擦、腐蚀而引起的损坏，提高管线的可靠性。