Among the functions that we already know with EVs is their extraordinary gear options. But the AMG arm of Mercedes-Benz has just proven that they can make cars that out-muscle And Out-hustle everything powered by gasoline. And they have just established an amazing series of milestones with two concept AMG GT XX cars that broke more than 25 long-distance records.
First, the twins, 1,360 hp cars traveled the equivalent of a round of the earth-25,000 miles-in eight To dawn. After each charging session, they accelerated to a constant speed of 186 miles per hour around the Nardo Test Job of Italy – and thanks to a pretty amazing charging technology that Mercedes has created, also charged with a ridiculous percentage of 850 kW. That is the equivalent of adding nearly 250 miles in just five minutes.
That all means, what? Well, here is how we see the milestones and what it means for future EVs.
Lighter, more powerful engines of … Magnets!
The concept AMG GT XX cars use axial flux engines. Yes, it sounds like something from Star Trek or Star Wars. In short, the idea is relatively easy. Current EVs use a radial flux motor. That is where the electromagnetic flux runs perpendicular to the rotation axis of the engine. But in an axial flux motor, the flux runs parallel to the rotation axis of the engine. In essence, this revised set -up makes more power transfer possible in a much smaller package.
You can imagine that if you can supply the power of an EV with one engine three times and reduce a considerable weight, double motors would not be necessary.
Mercedes-AMG says that they can supply the power of radial flux engines of radial flux, and the engines themselves are small, about just a third of the size. That means that in the concept of AMG GT XX Mercedes a few engines could mount on the rear axle, but would still achieve an incredibly low-drag silhouette. These engines are also two -thirds lighter than those of a radial design. Moreover, they are more sustainable and can work at a higher continuous peak couple output.
Slippery
Like many production cars, the concept of AMG GT XX uses grilled shoes. In this case, to both cool the motors of the car and to reduce the drag, Mercedes designed the shutters to stay closed to send air under the chassis, and only to open in the case of the need to add cooling – more to the last, below.
Airflow both above and below the car further reduced the resistance on the already incredibly slender body – it has a towing coefficient of just under 0.19. Thanks to simple physics, however, the car went faster, the more wind resistance it had to overcome. At 186 miles per hour, 83 percent of the power was used to overcome aerodynamic resistance. That meant that even reducing C/D with .0001 was the equivalent of cutting 198 pounds from the vehicle.
An oiled EV
That said, heat is the enemy of efficiency, so both the battery and the engine units use a closed oil circuit that is electrically driven through a new unit that Mercedes calls a Central Coolant Hub (CCH). This works as an on-demand a/C unit that actively monitors the temperature of the engines and the battery, as well as other components, and prevents them from becoming too hot. And it “know” when you also charge quickly, so it also explains the heat generated by refueling. Mercedes says that the CCH made more speed of each process possible, from driving with triple figures to fast charging at 850 kW, to maximum acceleration back on the track.
Moreover, it prevented the grid hatches from opening – which would have reduced the reach by adding resistance.
Inaugurate
There is re-gene and then there is what the concept of AMG GT XX is used. To bring back so much power in the vehicle, engineers developed a powerful re-generative braking system that can generate more than .6 GS. This in turn meant that brake cooling was almost superfluous and instead, Mercedes with carbon fiber -dressed hubcaps created air through the car, from the outside to the inside on the front axle and in the opposite direction at the rear. That created maximum downforce and control at 180 miles per hour.
Stadical wind resistance
Although it was not used for the AMG GT XX concept, Mercedes-Benz experimented a new technology that can be used on future cars. The idea is to create an electrified “skin” on certain parts of the car that would otherwise need a physical spoiler – which has disadvantages because spoilers add both weight and costs and are only functional at certain speeds. But a alternating current creates a minute that can also interrupt the air flow, so the “release” of air at the back of the car can be treated in this way and takes very little energy to work, and only needs to be functional with certain speeds.
Take top speeds
Much of this technology probably seems very far away from production. But we are already certain that the axial flux engines will soon reach production, because they solve so many problems at the same time:
Reducing weight
More Power
Reduce size
You can imagine that if you can supply the power of an EV with one engine three times and reduce a considerable weight, double motors would not be necessary. That further reduces the weight and costs. If only one of these engines was used, this could produce nearly 500 hp. Even if that is 400 horses, it is enough for most production vehicles. And the crucial factor is that this means that Mercedes could do higher performance, but lighter electric cars that feel more on gas cars. The latter part is crucial.
Because in the beginning novelty stimulated the sale of electric cars. Now it’s time for them to blow gas cars away with pure driving excitement, and that can only happen if they finally feel just as agile, lightweight and fun as what we know from gas cars.
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