When we usually buy a car, we are more exposed to the terms design, configuration and power! Now, in order to better enrich the publicity of brand models, businesses are also trying their best to tap the selling points of products, such as the drag coefficient we are going to talk about today.
So, what is the drag coefficient for us ordinary users?
The so-called drag coefficient refers to a mathematical parameter determined by wind tunnel test and gliding test. In the industry, the drag coefficient is affectionately called air drag.
Friends who often drive know that in our daily driving process, in addition to the friction on the ground, air resistance has a great influence on the car, and the concept of frontal windward wind resistance is the most talked about.
When the vehicle runs under normal conditions, it will exert a certain pressure on the front of the vehicle. When the gas flows through the roof and reaches the rear of the car, it will form a vacuum low-pressure area, and the negative pressure thus formed will produce a reverse force, which will hinder the vehicle from moving forward, which is what we often call air resistance!
When the car was originally designed, it was thought that as long as the power was large enough, the car could accelerate quickly, so more car companies put research and development funds on the engine. It was not until the beginning of the twentieth century that the concept of drag coefficient was taken seriously with the continuous improvement of vehicle speed.
1934, Chrysler made the world's first streamlined car, which caused a great sensation and triggered global car companies to follow suit. Nowadays, in order to better consider this characteristic, in addition to the previous computer simulation test, it will be verified by wind tunnel test later.
After a period of research, we found that aerodynamics can not only reflect wind resistance, but also restrict power, fuel consumption, wind noise and stability to some extent. For example, in our life, airplanes and sports cars attach great importance to low wind resistance design, which is the "streamline" of our visual experience.
Data show that about 60% of energy consumption is used to overcome air resistance when the car is driving at 80 kilometers per hour. And with the increase of vehicle speed, this ratio will rise linearly. When the vehicle speed exceeds 200km/h, more than 80% of the power will be used to overcome the air resistance.
So in recent years, even if the drag coefficient is 0.0 1, car companies are trying to reduce it! According to the current industry rules, the drag coefficient of cars is lower than 0.3, and that of SUVs is lower than 0.35, all of which are excellent.
However, the wind resistance of the car is not as low as possible! For example, when a sports car is running, the low drag coefficient will affect the stability of the car body. Because the air with fast flow rate and the stable airflow under the car will form a large pressure difference, which will produce a rising force, which is often called "floating" in the industry!
Therefore, in super sports cars, some designs are designed to improve the wind resistance of the car, such as bigger and wider tires and solid rear spoiler ... For friends who pursue performance, the power should also be above the fuel consumption of the car!
Today, let's talk about several models with low drag coefficient!
BYD Korea EV (drag coefficient: 0.233)
As the hottest electric car in BYD, BYD Han has a low drag coefficient! In terms of design, the front face design of BYD Han EV still continues the family-style design language of BYD's "Dragon Face", but its details are very exquisite, such as the low body and closed air intake grille.
In the outline of the body shape, the upper part of BYD Han EV gradually narrows, which makes the body form a more powerful wide-shouldered shape. With the cooperation of the concealed door handle, the drag coefficient of this car has been greatly improved. The rear part of the car adopts the design concept of "front circle and rear", and the addition of duck tail also enhances the sense of movement of this car.
Gac ENO. 146 (drag coefficient: 0. 146)
On 20 19 Guangzhou Auto Show, Guangzhou Automobile Group brought an electric passenger car with a drag coefficient of only Cd0. 146, and named it after the drag coefficient. In design, ENO. 146 adopts the design of "wind-plastic front face", which is full of movement and emphasizes the scientific and technological atmosphere of electric vehicles.
In the design process, Guangzhou Automobile Group ENO. 146 also introduced a brand-new "vector kinetic energy" modeling language, which brought a record low drag coefficient to it, such as the appearance of water drop body, optimized airflow sculpture chassis, active rectifying gas ring, telescopic ship-type gas dam and other pneumatic components.
SSC lizard (wind resistance coefficient: 0.279)
The first feature of super running is light weight and low wind resistance. The official data really didn't disappoint. Under the weight of 1247 kg, its wind resistance is only 0.279. As a super sports car that can keep pace with Koenigsegg and Bugatti, SSC Tuatara's original intention is to hit the world's fastest and fastest production car record.
Carbon fiber body and chassis, aerodynamic car design and various black technologies make this car look very different from other sports cars. At the same time, the larger V-tail shape can also enhance the visual impact of this car. With the blessing of 5.9T twin turbocharged V8 engine, the power acceleration is beyond imagination!
Tucki P7 (resistance coefficient: 0.236)
As a member of the new domestic car-making forces, Tucki P7 is also famous for its low wind resistance! It is reported that the ultra-low drag coefficient of 0.236 has also increased the cruising range of this car by about 40km. In design, Tucki P7 paves the way for the low wind resistance of the car body through streamlined design, hidden dream handle, semi-hidden wiper, low wind resistance rearview mirror and other details.
At the same time, Tucki P7 also introduced AGS active air intake grille, which can be automatically opened and closed according to actual working conditions, reducing wind resistance under high-speed working conditions. In addition, the bottom of Tucki P7 also adopts a flat low wind resistance design, which completely covers the bottom fender. With the cooperation of the rectifier, the wake vortex can be further optimized, and finally an almost completely flat chassis with low wind resistance can be built.
What is written at the back?
In today's pursuit of performance, ultra-low wind resistance design can not only bring users a streamlined body, but also enable users to create better dynamic performance in specific environments, especially electric vehicles under the "new four modernizations" policy! So, in your eyes, what other high-performance "low-resistance cars" are there?
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.