The function of automobile wire harness in the whole vehicle is to transmit or exchange the power signal or data signal of the electrical system to realize the functions and requirements of the electrical system. It is the network main body of the automobile circuit, and there is no automobile circuit without harness. The design process and manufacturing process of automobile wire harness are relatively complex, and the harness engineer is required to be careful and meticulous, without any carelessness. If the harness is not well designed and the functions of each part cannot be organically combined, it may become a frequent link of automobile faults. Next, the author briefly talks about the specific process of automobile harness design and manufacturing.
1. Firstly, the electrical layout engineer shall provide the functions, electrical loads and relevant special requirements of the electrical system of the whole vehicle. The state, installation position, and the connection form between the harness and the electrical parts.
2. According to the electrical functions and requirements provided by the electrical layout engineer, the electrical schematic diagram and circuit diagram of the whole vehicle can be drawn.
3. Carry out energy distribution for each electrical subsystem and circuit according to the electrical principle circle, including the distribution of grounding wire of power supply and grounding point.
4. According to the distribution of electrical components of each subsystem, determine the wiring form of the harness, the electrical components connected to each harness and the direction on the vehicle; Determine the external protection form of the harness and the protection of the through hole; Determine the fuse or circuit breaker according to the electrical load; Then determine the wire diameter of the wire according to the quantity of the fuse or circuit breaker; Determine the wire color of the conductor according to the function of electrical components and relevant standards; Determine the model of the terminal and sheath on the harness according to the connector of the electrical component itself.
5. Draw two-dimensional harness diagram and three-dimensional harness layout diagram.
6. Check the two-dimensional harness diagram according to the approved three-dimensional harness layout. The two-dimensional harness diagram can be sent only if it is accurate. After approval, it can be trial produced and produced according to the harness diagram.
The above six processes are too general. In the specific process of automobile wire harness design, there will be many problems, which require the harness designer to calmly analyze, ensure the rationality and reliability of the harness design, and ensure the smooth progress of the vehicle circuit design.
Post time: Jul-20-2022
