The lower the drag coefficient, the better. Inventory of Five ＂Extreme Chasing Wind＂ Models

What is the drag coefficient? What’s the use of this thing So who are the popular players in these low wind resistance models? Today we will make a small inventory together.

Air is invisible but everywhere. When it starts to move at a certain speed, it becomes a fluid-wind. The drag coefficient Cd can also be intuitively understood as a standard of the size of the object affected by air drag. Yes, this is a standard (dimensionless coefficient), not a definite value. Wind resistance is not the same concept as wind resistance coefficient. Its calculation formula is as follows:

Wind resistance coefficient = frontal wind resistance ×2÷ (air density x frontal projection area x vehicle speed square)

Although this standard still follows the law that the greater the resistance, the greater the value. However, according to the different projected area of the front of the car and the different vehicle speed (these two values are located in the denominator of the formula), we will get different expressions of the wind resistance coefficient. Even the same car will get different wind resistance coefficients due to the changes of temperature and vehicle speed, and the vehicle speed and test situation corresponding to the lowest point of the wind resistance coefficient are also different. Therefore, there is no uniform standard for brands to publicize the wind resistance coefficient, and it is impossible to directly compare the wind resistance with the principle of "low is good".

So why do cars nowadays pursue low drag coefficient so much? The first is drag reduction. Lower resistance means lower energy consumption, which is very important for new energy pure electric vehicles that survive under the value of "battery life is everything". At present, the object with the lowest wind resistance known in the world is water droplets, only 0.05Cd. It is not difficult to understand why the current pure electric vehicle is so "rounded" with fewer pores and openings. So in 2023, among so many new cars that constantly refresh the performance of "low drag coefficient", which cars are "extremely chasing the wind" and have a good heat?

Official drag coefficient: 0.227Cd

At first glance, this drag coefficient seems not difficult to achieve, and it is not prominent enough in a group of new cars that are infinitely close to 0.2Cd. Actually, the Tucki X9 is a large MPV with a large size, and it is not easy to achieve such performance with a higher posture and a larger front projection area.

From the appearance, the design of Tucki X9 is very unconventional, which continues the family design style, but also makes a brand-new interpretation of the MPV shape, which makes people impressed after reading it. As a new force to build cars completely from pure electricity. Tucki’s styling design will hardly be influenced by the styling design of fuel vehicles, and it has also become a "genre" of the exterior design of pure electric vehicles. Through-type lamp eyebrows and split headlights are basically integrated into the integrated front face, which ensures the low-resistance characteristics of the front to the greatest extent. In addition, the basic flat side glass and telescopic door handle further optimize the aerodynamic effect and make the body elements more concise.

The interior also inherits the minimalist style of appearance, and basically does not see the existence of traditional buttons, and most functions can be operated by speech recognition. What is particularly commendable is that the Tucki X9 is very particular about the design of the seat shape and the selection of filling materials, and the activity of the second and third rows of space inside is also very strong, and the walking passages and vertical heights are very ample, which makes it feel like "meat buried in rice".

In the configuration of power and endurance, the strength of Tucki X9 should not be underestimated. At present, the new car has been given two kinds of power combinations: single motor and dual motor, and 84.5kWh Ferrous lithium phosphate and 101.5kWh ternary lithium batteries can be selected. The pure electric cruising range of CLTC is 610km (long battery life of single motor) /702km (long battery life of single motor) /640km (four-wheel drive version of dual motor), which is remarkable in the face of the higher self-weight and wind resistance of MPV models. In addition, Tucki’s ace in the hole-high-order intelligent driving skill is being launched nationwide, and friends who like intelligent driving experience are worth trying.

Official drag coefficient: 0.22Cd

When it comes to pure electric cars, how can we not mention Tesla? Although the new Model 3 has not changed the overall structure of the original car body, the drag coefficient has been successfully reduced from the original 0.23Cd to 0.22Cd through further "shaping". From the evolution of new and old models, we can also see Tesla’s overall understanding of the shape of pure electric cars-closed front face, short front and rear suspension and sliding back rear. The new Model 3 is more like a supplement to the appearance of the old model, becoming more atmospheric and more acceptable.

In the interior part, the biggest change of the new Model 3 is the decentralization of the touch shift technology, which makes the minimalist effect of the whole vehicle further. In addition, the X-inch small entertainment screen and ambient light in the back row also respond to everyone’s "rough room". At this point, Tesla is very persuaded.

In terms of power, at present, the new version of Model 3 supplied in China has single-motor rear-drive and dual-motor long-life all-wheel drive versions, and the comprehensive battery life of CLTC reaches 606 km and 713 km respectively. The lithium iron phosphate battery with a battery capacity of 60kWh and the ternary lithium battery with a battery capacity of 78.4kWh are matched with the two models. Compared with the battery pack with the same level of competing products, the battery capacity can make such a battery life. Tesla is indeed an expert in controlling energy consumption. What’s more, its overcharge system is accelerating its expansion, further resolving the endurance anxiety. If you want to experience the most mature next-generation pure electric travel mode, then the new version of Model 3 Huan is definitely a reserved option.

Official drag coefficient: 0.203Cd

Counting the success of self-owned brands in building cars this year, Huawei’s smart car selection model must be an important branch. In the past, the topic of smart cars kept exploding. In the second half of this year, we also saw Huawei’s deeply empowered car product-Zhijie S7.

As the first coupe model under the intelligent car selection system, the design style of Zhijie S7 continues Huawei’s aesthetic principle of "extreme, pure and simple". The overall shape is round and simple, but there are some similarities with the family model in details. In addition, Zhijie S7 also added the design of canard tail, body guide groove and other details, which optimized the wind resistance and brought more sense of movement.

In terms of power, Zhijie S7 matches the combination of front AC asynchronous motor and rear permanent magnet synchronous motor. There are two specifications of rear drive single motor and four-wheel drive dual motor, and the fastest acceleration is only 3.3 seconds. In terms of battery selection, Zhijie S7 provided battery capacity specifications of 6282100kWh respectively. On the single motor version, these three batteries can achieve CLTC pure battery life of 550,705,855 kilometers respectively, which is also a very advanced performance in the same class. In addition to excellent energy management and wind resistance performance, the software ecology of Zhijie S7 and the expansion ability of intelligent assisted driving can also be played. The entry of Huawei HarmonyOS system has brought many possibilities for the expansion ability of this car.

Official drag coefficient: 0.199Cd

I thought that cars with low wind resistance were not cheap, but the appearance of Geely Galaxy E8 made the wind resistance and price of pure electric high-quality cars "two-pronged". As Geely’s high-end product sequence, Galaxy’s flagship product. Geely Galaxy E8 has achieved a perfect balance between people-friendly prices and high-quality attributes.

Compared with the previous round features, Geely Yinhe E8 has made a differentiated distinction in product modeling, which is particularly rare. First of all, although the design of the front face shape is mainly closed, it makes a variety of visual effects through lighting elements and luminous grille, which makes people shine. In addition, on the basis of the crisp slip-back shape, Geely Yinhe E8 also incorporates China’s classical aesthetic elements in many details of the interior and exterior decoration, which is both beautiful and full of cultural connotations.

Based on the excellent driving performance of SEA architecture, the performance of the walking part of Geely Galaxy E8 can also be played. The double-motor version has an acceleration of 3.49 seconds, and it is difficult to find an opponent at the same level. On the single-motor version with relatively excellent endurance performance, Geely Galaxy E8 can choose 62kWh and 76kWh battery specifications. Although the battery capacity is not large in general, the pure electric cruising range of CLTC has reached 550 km and 665 km, which can also meet the daily use needs. In the 200,000-yuan pure electric car market, Geely Yinhe E8 has stepped out of its own unique style with lower threshold and the same technical level.

Official drag coefficient: 0.195Cd

At the end of 2023, a 150-minute press conference of Xiaomi brought us a lot of heavy technologies, as well as a lot of information about the first model SU7. According to general manager Lei, the drag coefficient of this C high-performance coupe reached 0.195Cd, which surprised all four seats.

From the overall shape of SU7, it is not difficult to see that the Xiaomi team has been deeply learning about automobile engineering and manufacturing in the past 1000 days. For a technology brand trying to build a car for the first time, the appearance scheme of SU7 is quite mature. The vehicle adopts the body design of sliding back modeling. Details such as hidden door handles and electric tails are also not absent.

According to the information we can get at present, Xiaomi SU7 will provide two kinds of power combinations, single motor and dual motor, and the acceleration time of zero hundred can reach 2.78 seconds at the earliest. This data performance is arrogant. In terms of battery configuration, the Kirin battery on Xiaomi SU7 is given in two specifications: 73.6kWh and 101kWh, and the pure battery life of CLTC reaches 668km and 800km respectively. For Xiaomi, who is good at being a "price butcher", such endurance performance has been very "fierce". According to Xiaomi’s consistent "parity style", as long as the price is in place, SU7 can not only achieve "wind resistance equality", but also become a clear representative of "technology equality" and "price equality" in the automobile circle. Then I would like to ask Mr. Lei, how much are you going to "make friends"?

From 0.2xCd to 0.1xCd, the transformation of new energy has inserted wings for the development of low-resistance design of automobiles, and also made significant progress in the continuous driving ability of trams. Among the models that have not yet been officially listed, some new cars have once again set a new record for the low drag coefficient of production cars. So how many surprises can the new cars in 24 years bring? Let’s wait and see.