car body harness circuit network, not automobile harness circuit does not exist, the harness becomes substantially the same form, which are formed by a stamped copper contact terminal (connector) and the wire after cable crimping, the outside insulator or plastic pressure is applied and then a metal shell so as to form a bundled wire harness assembly connecting circuit. With the increase of vehicle functions and universal application of electronic control technology, more and more electrical parts, wires will be more and more, it becomes harness the heavier crude. Therefore, on the introduction of advanced automotive CAN bus configuration, multi-channel transmission system. Comparison with the conventional wire harness, multiplex transmission apparatus greatly reduces the number of wires and associated plug-in, a more simplified wiring. Due to the special nature of the automotive industry, automotive wiring harness manufacturing process is also more special than other ordinary harness.
1. harness function
at present particularly high car use harnesses, electronic control systems and harnesses are closely related. Automotive wiring harness is subject vehicle electrical network, which is connected to the electronic and electrical components of the automobile functions. To ensure that both transmit electrical signals, but also to ensure the reliability of a connection circuit, a predetermined current value supplied to the electrical and electronic components, to preventElectromagnetic interference around the circuit, and to exclude electrical short circuit.
automotive wiring harness up points from the function, the drive carriage actuator (actuator) power line and the power transmission line sensor input signal two kinds of instruction. Power line conveying the thick wire is a large current, and the fine wire signal line (optical fiber communication) does not carry power.
With the increase of the vehicle functions, universal application of electronic control technology, more and more electrical parts, electric wires will be more and more, and the number of circuits on the car a significant increase in power consumption, it harness It becomes more heavy crude. This is a big problem to be solved, how to make a lot of how to more effectively harness the rational arrangement in a limited space in the car, the automotive wiring harness play a greater function, it has become a problem faced by the automotive industry. .
2 harness Category
1, a vehicle body harness: from the left side is close to the cab floor walking, and the rear light sensor connected to the fuel tank.
2, engine harness: a variety of sensors and actuators connected to the engine, surrounding the engine.
3, the instrument panel harness: a wire harness connected to the vehicle body or chassis, along the various electrical devices connected to walking beam tube such as the instrument cluster on the dashboard, the air conditioner switch, cassette players, cigarette lighter or the like.
4, the door harness: all electrical connecting member of the door inner panel, such as central locking, window regulator, speakers and the like.
5, the cowl harness: coming from the cab, around the front connecting electrical devices such as the steering side and along the front fender and bumper frame front combination lamp lights, speakers, and other electronic fan.
6. The automotive wire bundle typically designed to H and E, is also designed to be simpler T-shaped.
automotive wiring harness industry development
China’s automobile industry has developed rapidly. Vehicle production in 2007 from 8.89 million to 13.79 million last year, especially in car production in 2009 increased by 48.2 percentage over the previous year. It estimated that by 2010, China’s auto output will more than 15 million, vehicle production factors to promote the development of China’s automotive wiring harness industry still exists.
the development of China’s car industry is basically built on the basis of the introduction, the introduction of models of production determines the harness can only be imitation or equivalent development, therefore the development of automotive wiring harness technology always lags behind the development of vehicle . At present, the popularity of Chinese cars, security, application is the main type, so the car harness technology will remain at current levels, but with the families of the car, the car’s configuration requirements will also be more and more diversified and complicated, non-standardized, tens of thousands of sets of wiring harness plant, or even hundreds of thousands of sets of exactly the same situation will be broken harness the use of non-metallic conductive materials, production integration module will be the first topic of research in recent years to harness plant.
Since the advent of high performance crimping machine with automatic detection, then punctured new technology, new sound equipment, and vehicle engineering change frequently, delivery cycles, conventional, workshops, manual operation harness production will gradually be eliminated, so the progress of self-development capacity, design parameters, system design, vehicle design to maintain synchronization with the main development direction of China automotive wiring harness industry. Harness diverse functions, OEMs will be asked to provide the right parts plant to achieve immediate spare parts, will completely break the traditional mode of production and supply.
At present, more powerful harness plant have to build car plant location, in order to adapt to the rapid response requirements in the United States and Europe, wiring harness factory delivery time has been reduced to ninety minutes, which requires wiring harness IT governance system works not only a rapid response and reliable quality assurance system, there must be fluent material systems, as well as staff training system. Chinese car production base format has been basically formed, driven by OEMs, has become a harness-scale production base, northeast, east and harness production accounting for more than 63 percentage of the national market, but also its ability for sustainable development is better thanOther areas.