china automotive research institute announces the top ten low-drag and low-noise models of 2024
2024-09-06
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on september 5, china automotive engineering research institute co., ltd. released the "top ten low drag and low wind noise models of 2024". the selection and scoring of the top ten models are strictly based on the "caeri-gz-39-2020 low drag vehicle certification implementation rules" and "caeri-gz-95-2021 low wind noise vehicle certification implementation rules", which set a benchmark for automotive aerodynamic performance and is also conducive to further promoting automotive aerodynamic technology innovation.
the drag coefficient of a car is an important evaluation index of its aerodynamic performance, and it affects its power economy, driving comfort and stability. under certain conditions, the lower the drag coefficient, the better the power economy and the higher the cruising range.
at present, the china automotive research institute wind tunnel center has evaluated the wind resistance and wind noise performance of more than 120 mass-produced models. the results show that the overall wind noise level of mid-to-high-end models of chinese brands is better than that of joint venture and imported brand vehicles. data shows that the drag coefficient of newly developed models of chinese brands is showing a downward trend year by year, and the overall drag coefficient of the whole vehicle is at the level of 0.3~0.2. among them, more and more models have a drag coefficient of less than 0.2, reaching the world's advanced level.
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the china automotive research institute wind tunnel center is a leading third-party technical service platform and research institution for automotive aerodynamics, wind noise and thermal management in china. it was completed and put into use in 2019. it is the first aerodynamic-acoustic wind tunnel for a whole vehicle in the central and western parts of china. its technical indicators have reached the international first-class and domestic leading level. it is the first wind tunnel institution in china with dual certification qualifications for euro vi/wltp and cnas national vi wind tunnel method. it is also the only wind tunnel institution in china with low wind resistance and low wind noise certification qualifications. taking advantage of the advantages of wind tunnel testing equipment, the china automotive research institute wind tunnel center has independently developed the world's first high-efficiency, high-precision, and highly automated numerical wind tunnel software platform that integrates ai intelligent development tools, realizing the digital development of automotive aerodynamic performance. the numerical wind tunnel software platform has begun to be used in the aerodynamic performance development of new models of many automobile companies. at the same time, the china automotive research institute wind tunnel center regularly holds an annual automotive aerodynamics academic conference every year to build a technical exchange platform for domestic automobile companies and universities, and holds university innovation simulation competitions to promote automotive aerodynamics simulation technology and assist in talent training in universities; vigorously develops and promotes automotive aerodynamics group standards, promotes automotive aerodynamic drag reduction development technology innovation, and also spawns a domestic automotive low wind drag development boom.
under the background of the dual-carbon strategy, "energy conservation and emission reduction" and "electrification" have put forward high requirements for automobile energy consumption, so aerodynamics has also received more and more attention. the "international council on clean transportation (icct) white paper" shows that if the wind resistance is reduced by 10%, the fuel consumption will be reduced by about 2.6%, and co2 emissions will be reduced by about 3%. the drag coefficient cd of the developed models is reduced by an average of 10%, among which the average fuel consumption of fuel vehicles can be reduced by 0.12l/100km. if the annual production of low wind resistance development results is 8 million vehicles, based on a mileage of 10,000km/vehicle/year, 96 million liters of fuel will be saved each year, saving more than 864 million yuan in fuel costs; the cruising range of electric vehicles can be increased by an average of about 15km, and the power consumption of a cruising range of 500km will be reduced by about 1kwh. according to the annual production of 200,000 vehicles of a certain application enterprise, the comprehensive cost of power batteries is 1,000 yuan/kwh, and the cost of a single vehicle with the same cruising range can be reduced by 1,000 yuan, and the annual manufacturing cost can be reduced by nearly 200 million yuan. (china daily chongqing reporter tan yingzi)
source: china daily
