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Mobile WebSiteIn modern cars, automotive wiring harness is particularly large, electronic control system and wiring harness is closely related. Someone has played an image of the metaphor: If the computer, the sensor and the implementation of the function of the components with the human metaphor, it can be said that the computer is equivalent to the human brain, the sensor is equivalent to the sensory organs, the implementation of components equivalent to the movement tube, then the harness is the nerve And blood vessels.
Automotive wiring harness is the main body of the car circuit, connecting the electrical and electronic components of the car and making it function, there is no wiring harness does not exist in the car circuit. At present, whether it is a luxury car or an economy car, the wiring harness is basically the same form, are composed of wires, connectors and wrapping tape, it is necessary to ensure that the transmission of electrical signals, but also to ensure that the connection circuit The reliability of the supply of electrical and electronic components to the provisions of the current value to prevent the electromagnetic interference around the circuit, and to exclude electrical short circuit.
The car harness is functionally divided into two types of power lines that carry the drive actuator actuators (actuators) and the signal lines that carry the sensor input commands. The power line is a thick wire that carries a large current, and the signal line is a fine wire (optical fiber communication) that does not carry electricity. For example, the signal circuit has a conductor cross-section of 0.3 and 0.5 mm2.
In the motor, the implementation of the conductor with a cross-sectional area of 0.85,1.25 mm2, and the power supply circuit with a cross-sectional area of 2,3,5 mm2; and special circuits (starter, alternator, engine ground, etc.) 10,15,20 mm2 different specifications. The larger the cross-sectional area of the wire, the greater the current capacity. The choice of wire, in addition to considering the electrical performance, but also by the physical performance of the vehicle when the constraints, so its wide range of options. For example, the frequent opening / closing of the car on the car and across the body between the wires should be composed of good bending performance of the wire. In the high temperature of the use of the wire, the general use of insulation and heat resistance of vinyl chloride, polyethylene coated wire. In recent years, weak signal circuit using electromagnetic shielding lines are also increasing.
With the increase in the function of the car, the universal application of electronic control technology, more and more electrical parts, the wire will be more and more cars on the number of circuits and electricity significantly increased, the wiring harness becomes more thick and heavier The This is a big problem to be solved, how to make a large number of wiring harness in a limited car space how to more effectively rational layout, the car harness to play a greater function, has become a car manufacturing industry problems.
Automotive wiring harness is the main body of the car circuit, there is no wiring harness there is no car circuit. With the improvement of car safety, comfort, economy and emission requirements, automotive wiring harness becomes more and more complex, but the body to the wiring harness space is getting smaller and smaller. Therefore, how to improve the overall performance of automotive wiring harness has become the focus of attention, and automotive wiring harness manufacturers do not simply engage in the late harness design and manufacturing, and automotive OEM manufacturers to carry out early development of the inevitable trend.
As a key component of Hyundai's car, automotive harnesses include thousands of assembly components that connect the various electronic systems together so that they can work together. Any wiring harness failure, may have an impact on the entire system. However, in order to cope with the growing demand for electronic systems within the vehicle, the complexity of automotive wiring harnesses is increasing, so we are more pressing to quickly and easily detect open circuit and short circuit. Line diagnostics are very important throughout the life of the vehicle. From the installation phase, diagnosing and repairing line faults can cause serious manufacturing delays. During the operation phase, diagnosing and repairing line faults can result in an increase in the number of car repairs, thereby significantly increasing the manufacturer's warranty costs.
Active safety systems, including lane detection and parking assist systems (front and rear view cameras), as well as infotainment systems (including navigation and rear seat entertainment), are more concerned about the automotive electronics system. To make these systems run efficiently, video data transmitted from the corners of any car through the harness must be reliably transmitted to the driver and passengers. Harness health is critical to maintaining the proper operation of these systems.
Proposed a circuit concept that can provide reliable and cost-effective technology to implement diagnostics on video and audio transmission lines for automotive applications.
