On March 30, Changan Automobile officially announced that due to insufficient antioxidant capacity of the vehicle coolant, it may cause a decrease in cooling performance, which may affect the cooling effect of the cooling system. Extreme conditions may cause high water temperature and potential safety hazards. Therefore, it will recall a number of models including CS75, Ruiqi and CS35 from March 31, totaling 121,000. In this regard, Changan Automobile said that it will provide the owner with free cooling system cleaning and replace the maintenance and repair service of the coolant to eliminate potential safety hazards.
The reporter learned from the 4S shop of Changan Automobile that the recall is not a big deal. The cleaning of the cooling system and the replacement of the coolant are only a hundred yuan in cost. Nonetheless, in the context of the strict implementation of the Regulations on the Management of Defective Automotive Products, the recall of vehicles due to component failure has become the norm. Statistics show that there were 144 domestic car recalls last year and the recall volume exceeded 5 million.
The trend of generalization of parts and components is constantly strengthening, and platform production is gradually becoming a trend. Automotive analyst Feng Shiming believes: "In terms of cost, platform-based production can really reduce the company's R&D and production costs, but at the same time, it increases the possibility of risk. Because even a small component problem All of them will trigger a large-scale incident of 'burning and burning camps'." Therefore, how to strengthen the management of supplier chains and balance the relationship between compression costs and risk control has become a prominent problem in the current test of vehicle management capabilities.
How many parts have been tested?
A car is made up of thousands of parts. What kind of component companies can enter the manufacturer's supply chain system, and at the national level, what are the management rules for the standard of parts and components?
Like the rest of the industry, in the automotive industry, the National Certification and Accreditation Administration has different certification standards and testing requirements for different products. In addition, some products must also pass the national 3C certification. In order to enter the supporting system of the vehicle manufacturer, the auto parts enterprise must establish an internationally recognized third-party quality system designated by the host manufacturer. Secondly, the host manufacturer must conduct strict scoring audits on all aspects of the parts and components factory, and conduct On-site manufacturing process audit; In addition, automobile manufacturers have corresponding auditing standards for raw material supply management capabilities, product production processes, product quality, capital, and technical strength of supporting manufacturers. After the completion of the audit, each accessory product entering the OEM's supply system will first be tested and certified by the component manufacturer, and then tested and calibrated with the OEM, experiencing various durability and “three highsâ€. Experiments, etc., adjust and calibrate according to the experimental data, and finally enter the mass production stage.
The technical staff of a domestic auto brand told this reporter that the time required for this process is about 18~20 months. Taking the gearbox as an example, according to the introduction, the current gearbox products are basically platform products, and the gear arrangement is suitable for all models. Therefore, when the OEM chooses, it only needs to select different models according to the requirements of its own products. After the selection is completed, the parts supplier will make a separate casing according to the characteristics of the engine matched with the gearbox to match the output of the engine. The input matches.
After the matching is completed, the vehicle manufacturer's EMS control strategy analyst and the transmission calibration engineer will work together to calibrate the above-mentioned gearbox products. The prototype will take at least 5 months or more to complete 50~60. Test the working conditions and observe the shifting strategy under different working conditions. Each test produces a large amount of data, and in the end, the engineers will work together to optimize the data so that the parts are matched to the vehicle to achieve optimal and stable conditions. According to the above technicians, the process of this test and calibration takes at least 8 months.
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