The Beijing Municipal Administration for Industry and Commerce recently issued a notice requiring all units of wholesale and retail oil products in the administrative region of the city to make preparations for replacement before the implementation of the new standard. Since the time of July 1st, they have been prohibited from selling and supplying non-Beijing vehicles. B's gasoline and diesel. For petrol and diesel that are stored in the wholesale company database for non-automotive use of DB11/238-2004 and DB11/239-2004A for non-automotive use in the field or in Beijing, special tanks must be reserved, special oil must be used, and a management ledger must be established. The number of arrivals, sales, and inventory matches. Each gas station should consciously strictly control the purchase of oil products and prohibit the purchase of oil products that do not comply with Beijing Standard B.
Carbon fiber composites can give cars many benefits and advantages. This extremely lightweight material is not a new material. His early application was concentrated in the aerospace field. Since 1975, it was first applied to military aircraft, and since 1980s, it has been applied to civil aircraft. The structural usage of a Boeing 787 aircraft exceeded 50%.
First, the weight can be reduced by 40% - 50% compared with steel structure and 20% - 30% compared with aluminum structure;
Second, high specific strength and specific stiffness: the specific strength is seven or eight times that of steel, three or four times that of aluminum, and the specific stiffness is two or three times that of steel and aluminum;
Third, the safety is improved: high impact resistance and excellent energy absorption capacity - four or five times higher than metal materials, which can greatly improve the safety performance of cars;
Fourth, the tensile strength is improved: the fatigue strength of steel and aluminum is generally 30% - 50% of the tensile strength, while it is 70% - 80%. The excellent fatigue resistance and corrosion resistance can extend the life of the car body;
Fifthly, the vibration absorption capacity is improved: the vibration absorption capacity and vibration damping performance are relatively high. The light alloy needs 9S to stop vibration, and it only needs 2S;
Sixthly, the number of parts is greatly reduced: the structure is formed as a whole, which can greatly reduce the number of parts and fasteners;
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Dongguan Ludi Automobile Technology Co., Ltd , https://www.ludirefitted.com