automotive wiring harness is subject vehicle electrical network, does not exist without the vehicle electrical harness. Refers to a harness made of stamped copper contact terminal (connector) and the wire cable after 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. Chain comprises a wire and cable harness, connector, processing equipment, and downstream applications harness manufacturing industries, the wire harness is widely used, can be used in the automotive, household appliances, computers and communications equipment, electronic instruments and the like, the whole body harness connection body , the general shape of an H-shape.
1. Basic automotive wiring harness description
automotive wire, also known as low-voltage wire, it is the ordinary household wiring is not the same. Common household electric wire is a single core copper wire, a certain hardness. The car copper wires are multi-core cord, the cord and some fine hair, several or even dozens of copper wire wrapped in a plastic insulating tube (PVC), soft and not easily broken.
Due to the special nature of the automotive industry, automotive wiring harness manufacturing process is also more special than other ordinary harness.
Production of automotive wiring harness system broadly divided into two categories:
1.To divide European countries, including China:
using the TS16949 system to control the manufacturing process. .
2 mainly to Japan:
such as Toyota, Honda, they have their own system to control the manufacturing process.
With the increase of vehicle functions, 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. Compared with the conventional harness, the multiplexing transmission means greatly reducing the number of wires and associated plug-in, a more simplified wiring.
2. Automotive wiring harness Features
In modern vehicles, particularly automotive wiring harness, electronic control systems and harnesses are closely related. Someone once made a vivid metaphor: if the function computer, sensors and actuators with a human analogy, we can say the computer equivalent of the human brain, sensory organs equivalent sensor, actuator equivalent of moving organs, nerves and then the harness is the blood vessels.
automotive wiring harness is subject vehicle electrical network, connected to electrical and electronic components and automobile of functions does not exist without the vehicle electrical harness. At the moment, whether it is high-level luxury car or economy ordinary car, basically the same harness woven form, is a wire, with plug-and-parcel tape composition, it has to ensure that transmit electrical signals, but also to ensure that the connection circuit reliability, a predetermined current value supplied to the electrical and electronic components, to prevent electromagnetic interference to the surrounding circuitry and to exclude electrical short circuit.
automotive wiring harness up points from the function, the drive carriage actuator (actuator) power from the power lineAnd transmitting an instruction input signal line sensors in combination. Power line conveying the thick wire is a large current, and the fine wire signal line (optical fiber communication) does not carry power; e.g. wire cross-sectional area of the signal circuit is 0.3,0.5mm2.
In the motor, wire cross-sectional area of the actuator used is 0.85,1.25mm2, and a power supply circuit with a wire cross sectional area of 2,3,5mm2; and a special circuit (starter, an alternator, an engine ground wire, etc.) is there 8,10,15,20mm2 different specifications. The larger wire cross-sectional area, the greater current capacity. Select the wire, in addition to considering electrical properties, but also constrained by the physical properties of the in-vehicle, so the choice is very wide. For example, the wiring between the taxi frequent opening / closing of the door and across the body should be formed from wire of good flexural properties. Parts of the wire used in high temperatures, insulation and heat is generally used with good chloride, polyethylene coated wire. In recent years, the electromagnetic shielding circuit using weak signal line is also increased.
With the increase of vehicle functions, the electronic control technology widely used, 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 becomes harness the heavier 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.