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Introduction to basic knowledge of automobile wiring harness
Time:2019-07-05 Read: 1887

Automotive wiring harnessIt is the carrier of the connection of various parts of the car circuit. Someone once made an image analogy. The car harness is the blood vessel, the car engine is the heart, the heart beats because of the blood vessel, and the engine runs because of the harness, which shows the importance of the car harness on the normal and stable circuit of the car. Therefore, it is necessary to understand the product and process knowledge of automobile wire harness.

Wire harness refers to the components that are formed by pressing the contact terminal (connector) made of copper material and crimping the wire and cable, and then molding and pressing the insulator or external metal shell to form the connection circuit with wire harness. In short, it is the wire connecting the car's electrical appliances. The car's operating conditions and parameters are reflected on the on-board computer through the harness. On the other hand, the electronic technology content of car harness has become an important indicator for evaluating car performance.

Car harness can be divided into main harness and small harness. The main harness includes engine harness, central junction box harness, instrument panel harness, passenger compartment harness, etc; The small harness includes door harness, battery harness, ABS brake wire harness, etc.
In addition, according to the voltage, the car harness can be divided into high-voltage harness and low-voltage harness. The biggest characteristic of the high voltage wire of the car is the high voltage and small current, and the insulation performance is required to be high, so the insulation layer is often thicker and the core wire is thinner.

The production process of automobile wire harness mainly includes wire opening, crimping, pre-assembly, final assembly, etc. The primary data of wire harness is heat-shrinkable data, which is an important insulation data in automobile wire harness. The market share of domestic heat-shrinkable materials used for car manufacturing is still very low, only about 20%. It is worth mentioning that 80% of the shopping malls in the world are occupied by Raychem in the United States and Sumitomo in Japan. The price of foreign manufacturers is 2-3 times that of domestic manufacturers.

With the development of car electronics, economy, comfort and reliability will become more and more prominent, and the requirements for wiring harness will be higher and higher. The domestic auto harness shopping mall will gradually transform from a low-cost strategic shopping mall to a more cost-effective shopping mall with higher technology content. Automobile wiring harness is also developing towards high voltage, lightweight and standardization.

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