Automotive Wiring Harness Design Wiring Requirements Automotive Wiring Harness Quality and Automotive Electrical System Reliability

As the number of electronic control units in the car increases, the data transmission capacity of each electronic control unit also increases exponentially, which requires the automobile wiring harness to have better information transmission function, and then the wiring of the automobile wiring harness is more and more complicated. Draw the electrical schematic diagram and circuit diagram of the whole vehicle; Distributing energy for each electrical subsystem and circuit according to the electrical principle circle; Determining the wiring form of the wiring harness; Drawing a two-dimensional wire harness diagram and a three-dimensional wire harness layout; These harness design steps must be carefully considered. In addition, there are some wiring harness design principles that should also be taken seriously, and strive to make the wiring of automobile wiring harness comprehensive and meticulous without any flaws. 1. The wiring harness between two moving parts must be fixed on each part, and the connection length of the wiring harness should be more than 25mm larger than the maximum replacement distance of the two parts. 2. All wiring harnesses placed near moving parts should have a clearance requirement of at least 50mm. At the maximum assembly tolerance of the harness, the clearance between the harness mounted on the drive train and the components not mounted on the drive train is at least 19 mm. Under the maximum assembly tolerance of the harness, under other operating conditions, this clearance is to ensure the entire range of motion of the moving parts/assemblies. 3. The harness-independent gap between adjacent components of the wire harness is at least 6 mm, unless the wire harness has been fixed to this assembly or there is an obstacle between the wire harness and nearby moving parts. 4. Automotive wiring harness branches must have sufficient slack (more than 25mm below the minimum length of the wiring harness), so they do not need to add load to the connected sensors or other sensors. 5. In order to prevent the grounding strip from damaging any wiring harness on the trunk, the minimum gap between the grounding lug on the wiring harness trunk and the wiring harness trunk should be kept at 25mm.

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Automotive wiring harness In automotive electrical system, the design of wiring harness is a relatively important work; The working reliability of automotive electrical system is largely guaranteed by the quality of wiring harness. In terms of MRP wire harness production, it also solves the major problem of balanced wire harness assembly. The rotary wiring table is an equipment for producing complex wire harnesses. A rotary wiring table consists of 10. Determining the number of people, output and balancing production is one of the most important tasks faced by production supervisors. For example, the instrument panel wiring harness is completed on a rotating wiring table with 12 stations. According to the production demand, one instrument panel wiring harness may be rolled off the line every Imin or one instrument panel wiring harness may be rolled off the line every 2m. This is necessary to ensure that every operator can produce according to the rhythm that suits it. Fushe beat is local coordination, and conforming to the rhythm is the whole production coordination. This requires the accurate decomposition of each action, and MRP is the calculation to solve this decomposition. From how many connectors each person fixes to the fixture, how many terminals are plugged, how many spots are wrapped with tape, the time to get materials, and the standard working hours, the MRP system calculates its reasonable rhythm and even rhythm according to its labor proficiency and production tasks, so as to ensure that its efficiency is greatly improved. The application of MRP has ended the long-term repetitive labor of manual calculation by production supervisors, and its effect is remarkable. Connect the gasoline injector to the plug-in connector of the simple device (at this time, the needle valve of the gasoline injector is normally open), and immediately put the nozzle of carburetor cleaning agent (or other special cleaning agent) against the outlet of the gasoline injector (the outlet is upward and slightly inclined) for intermittent or continuous injection cleaning. At this time, you can see the dark cleaning agent containing impurities flowing out from the outlet of the gasoline injector. When the color of the cleaning agent flowing out of the injector becomes clear, stop cleaning, and quickly unplug the plug to remove the simple device.

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