When Mercedes-Benz's transformation strategy changed from electric first in 2021 to full electric, pure electricity has become the clear direction of the future development of this century-old luxury brand; each new pure electric product released by the Mercedes-Benz EQ series seems to highlight the strength and determination of this century-old luxury brand.
On April 19, Mercedes-Benz released its third model under the EVA platform, a new flagship product , the Mercedes-Benz EQS SUV.
Perhaps due to the previous Mercedes-Benz EQS paving, this EQS SUV seems to be less mysterious, but after really understanding it, you will still find some amazing places.
Core highlights have been seen earlier, this time to see off-road?
After the Mercedes-Benz EQ brand launched this flagship SUV, it means that the EQ brand has opened up the flagship products of the two cores of cars and SUVs, and it also means that Mercedes-Benz's pure electric journey has officially begun.
The highlights of the first large luxury EQS SUV under mercedes-Benz EQ are as follows:
1. Based on the forward research and development of EVA pure electric platform, the 3210mm wheelbase is better than the current Mercedes-Benz GLS;
2. The body breaks through 5 meters, and the rear wheel steering supports up to 10 degrees;
3. Three rows of seven seats, the third row of seats can be optional;
4. Launched 450+ and 580 4MATIC versions of optional, corresponding to single motor and double motor;
5. Front and rear synchronous dual motor 858 Nm maximum torque, single motor 568 Nm maximum torque;
6.4MATIC with exclusive off-road mode, which is a large luxury pure electric SUV that can off-road;
7. Continue to be equipped with Hyperscreen ultra-screen technology, 12.3 +17.7+12.3 three touch screens;
8. Mercedes-Benz officially announced the cruising range, WLTP working conditions can reach more than 600 kilometers.
Most of these technology configurations we've already seen in the flagship sedan EQS are advanced and advanced, but not "very new" technology. However, we found a point in it "Exclusive Off-Road Mode" which is there a fresh technology we want to see?
The topic is a little farther, the Mercedes-Benz EQS SUV has an exclusive off-road mode, which means that this is a pure electric luxury SUV that can be off-road. Then the problem of off-road capability in the field of electric vehicles is better solved than that of fuel vehicles, and good off-road capabilities can be achieved without differential locks.
Existing solutions, including the skateboard chassis used by The Hummer EV, give the body a certain guarantee of rigidity, like a car with a girder, and the CrabWalk crab walk mode + three-motor e4WD drive system; tesla Cyberruck, which may use four motors (hub motors) and can achieve a four-wheel steering solution; and the Audi RS Q e-tron racing car, which uses an electronic four-wheel drive e-quattro system.
Mercedes-Benz EQS SUV does not have to make the off-road ability as extreme as the above models, but in general, electrification makes it easier to achieve off-road vehicles, without complex transmission structure can save more costs, space, the benefits of electrification can also make the wheels respond faster, higher torque.
So how does the Mercedes-Benz EQS SUV achieve off-road capability without a skateboard chassis and hub motor?
In the era of electrification, off-road capabilities are easy to strengthen?
Although the Mercedes-Benz EQS SUV is the flagship SUV product in the Mercedes-Benz EQ series, focusing on the luxury, avant-garde and advanced product design concept, as a flagship model, Mercedes-Benz wants to give more capabilities to its body. Therefore, they also put off-road capabilities on this pure electric vehicle.
The underlying logic is simple, models with 4MATIC four-wheel drive systems have exclusive off-road modes, while off-road couples of electric vehicles are usually achieved through the composition of electric motors. The motor composition scheme of the Mercedes-Benz EQS SUV is the same as that of the EQS, and the model with four-wheel drive system adopts the front and rear dual eATS electric drive system, which is equipped with the front and rear axles respectively.
Some people may wonder, Mercedes-Benz EQS SUV off-road, the body rigid enough? Here to say two points, the first Mercedes-Benz to the EQS SUV to give off-road capabilities is only an added value, is not its main face, the use of a scene, and in fact, there should be few people willing to drive such a car into the extreme road environment, so its existing off-road capabilities are strong enough, but stronger will be left to Mercedes-Benz EQG; second, the new energy track has been off-road vehicles have no longer talked about the "non-bearer body", including the skateboard chassis, the pure electric platform, including more or less a bit of non-carrier body shadow, The chassis requires an integrated battery pack, and the reinforcement beams on both sides usually use high-strength materials, and these reinforcement beams resemble "chassis girders".
Since there are no real cars in China that can be test-driven, but through the experience after the foreign media test drive, the Mercedes-Benz EQS SUV can easily climb the 42° slope after wading, and there is no wheel idling.
Mercedes-Benz EQS SUV's 4MATIC four-wheel drive system can carry out 10,000 scans per minute on four wheels, so it can be combined with the actual driving road face wheel timely adjustment; and torque distribution can also intelligently and continuously adjust the distribution of drive torque, can achieve the highest efficiency of eATS in any case, the front and rear axles are also used permanent magnet synchronous motors, with high power, high efficiency and high stability.
In addition, the front and rear axle dual motor layout is also the current mainstream configuration, equivalent to the traditional off-road vehicle transmission + transfer box configuration, but more intelligent can more accurately distribute wheel power, specific can do more accurate, which needs to be combined with different algorithms of different car companies.
Talk about the heat balance, under the off-road scene, you may often encounter the use of low-speed and large-torque range, the low speed of the car heat dissipation ability is poor, which will cause the motor to overheat at this time will limit a certain maximum torque release, which will directly lead to the limitation of off-road ability. If for more extreme use, you can also use a three-motor layout, such as a hummer EV3X front axle motor, rear axle two motors such a configuration, but will further increase the cost, and may not be able to play the three motors to the extreme, but can be a redundant device.
summary
In the field of electric vehicles to achieve four-wheel drive mode, it is not difficult from the hardware point of view, to the front and rear axles equipped with two motors on the line. Pure electricity genes, so that Mercedes-Benz EQS SUV this large size SUV can be given the ability to off-road, from the book data to see the ability is very strong, but not so extreme, the above also said that the reason is one is positioning, the other is to leave a certain space for EQG.
Before the Mercedes-Benz EQG came out, the EQS SUV should be the ceiling level of luxury, off-road large SUVs in the pure electric field, and may become a benchmark product to define the large luxury SUV segment. Finally, to extend it, last year's announcement of the concept car in a few years is the Mercedes-Benz EQG off-road scheme is now known, is equipped with four motors to achieve four-wheel drive mode, so that the torque distribution and control of each wheel are more accurate.