In recent years, more and more pure electric vehicles have been seen on the road, especially in the first-tier cities such as Beishangguangshen and Shenzhen. The time-sharing lease of electric vehicles has gradually matured. Although they are all four wheels, when people see electric cars, they can always see the difference with ordinary cars at first glance, but for a moment they can't understand exactly where they are different.
The reason behind this is not the unique paint or lacquer on these electric cars, but the many new design details on them. Of course, these details are not intended to highlight the identity of their electric vehicles, but have practical implications.
Today, Xiaobian takes a brief look at how the design of electric vehicles differs from that of ordinary fuel vehicles.
First of all, for a pure electric vehicle based on battery life, a parameter in the shape is particularly important. This parameter is the drag coefficient. Although the design of the fuel car also emphasizes the drag coefficient, most of them will not pursue the ultimate in this place. After all, the fuel consumption will increase slightly, and it will not affect the usual use.
For electric vehicles, the battery life after full charge is the most critical performance indicator. With such a data, for every 10% reduction in the wind resistance of an electric car, the cruising range of the car can be increased by 5%.
Don't underestimate this 5%. Tesla said in 2013 that Tesla reduced the drag coefficient of the production model S by 0.08 compared to the conceptual version through computer simulation. This improvement is expected to be Its cruising range has been increased by 50 miles, equivalent to 80 kilometers.
So, what methods do designers use to reduce the drag coefficient of electric vehicles?
In fact, in order to get the best drag coefficient, all aspects of an electric car will have an impact. For example, the flat chassis of an electric car allows the airflow to flow quickly and smoothly to the rear of the car. On the vehicle body, the designer tries to avoid sharp cross-sections, so the body of the electric car is mostly smooth. This, we can see in the Model S and Faraday's future FF91.
The front of the FF91 is very round, allowing the front airflow to flow smoothly to the bottom of the car when driving fast. On the chassis of the car, the designer also put a lot of effort into the air flow to interact well with the wheel and other parts.
In addition to the front and the chassis, another important part of the wind resistance is the wheel and the wheel arch. One third of the wind resistance of a car is applied to this part, so their shape is aerodynamic to a car. It is important.
The FF91's Aerologic Wheels change shape when in motion, making them more pneumatically efficient at high speeds.
When it comes to aerodynamic efficiency, you may have the misconception that a car with a higher aerodynamic performance must be low and smooth in shape, which is not the case. Take the example of the Portal concept car released by Chrysler not long ago. It seems that the contour of the square does not mean that its drag coefficient is necessarily high.
Portal is a car that pays attention to space and practicability, so the shape can't be the coup style like Model S, but if the designer puts enough energy and time, the aerodynamic optimization can be achieved for people and shapes. By careful comparison, we can find many similarities between the Portal and the FF91, such as the rounded corners that have been finely ground, the very smooth body surface, and the well-designed wheel arches.
Of course, all of the above are considered in detail. The biggest difference between the design of electric vehicles and fuel vehicles is that there is no need to set the front intake grille for cooling the engine. This is the easiest way for us to identify electric vehicles at a glance. At the same time, it is also a major factor in the technological revolution in the era of electric vehicles. It is important to know that the family genes of fuel vehicles are largely based on the shape of the grille.
Therefore, the front face of the new Model S and Model X does not reveal the "big mouth" on the ordinary car, but instead wears a mask. The FF91 and Portal mentioned above also have no obvious air intake grille. Look at the Volkswagen ID BUZZ, the concept car of the retro T2 van, and the front face without the grille is more futuristic.
However, it should be noted that the above-mentioned several models are all electric vehicles designed from scratch, and there are many car companies in China. In order to cope with the government's policy, they are based on the previous fuel vehicles. The transformation was carried out to introduce a pure electric vehicle with a still traditional appearance. For example, Chery's eQ, Beiqi New Energy's EV, EU series, Geely's Emgrand EV and so on.
The interior of the EU260 is still very traditional
BMW i3 interior, simple and spacious
These models have been derived from the previous fuel models, basically retaining the old structure, so all aspects can not maximize the advantages of electric vehicles, such as the drag coefficient that has not been optimized, the battery that can not be freely placed in the best position The group and the electric motor, as well as the interior that still has a layout, cannot fully exploit the space potential of the shift lever and the engine.
Obviously, these electric vehicles that cannot be identified at a glance cannot be compared with electric vehicles developed from scratch in terms of performance, battery life, space, and so on.
However, domestic brands with strong domestic strengths also have some pure electric vehicles with advanced design ideas, such as the Roewe e50, which has already been put on the market, the eQ1 (small ants) that have just come out, etc., which have very obvious electric cars. Unique features.
So, if you think about buying an electric car and don't know much about the dazzling models, the first step in making a choice is to see if you can identify the identity of the electric car at a glance. Doing this shows that these models are much better than the so-called new energy vehicles.
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