Li Fanyu's creation of this thing is actually not a new thing.

The concept of an in-wheel motor or a wheel-side motor was proposed a long time ago. This is also known as the legendary independent drive electric vehicle, or distributed drive electric vehicle.

In fact, whether it was in the time and space before the historical process of automobiles or now, this kind of driving car has been a big hit in various universities and car enterprise laboratories for a while.

It's just that in the end, this thing didn't hit the market on a large scale.

Li Fanyu has actually played with this thing once - that is, on the mountain-shaking minecart,

Because of the huge weight of the mountain-shaking minecart, if you only rely on the mountain god engine to start, one is that the starting speed is slower, and the second is because you wanted to make an armed minecart that can be fast under high dead weight, so the acceleration performance is also an aspect that needs to be considered.

However, if the normal mechanical transmission and hydraulic transmission are used, the internal transmission structure is too complex to ensure cost and reliability. So at that time, Li Fanyu had the mentality of being troublesome, and directly changed the power structure into a diesel engine for power generation, and used the electric drive to convert the kinetic energy into the motors on the four sets of tires. With the characteristics of large motor torque, wide range and no transmission structure, the power and speed of shaking the mountain are realized.

But the situation of Shaking Mountain is different from now, after all, one wheel of Shaking Mountain can be stuffed into five adults.

Now in such a small space, parts such as the motor, suspension and power recuperation are arranged. is undoubtedly the difference between snow sculptures and micro sculptures.

Li Fanyu knew this very well in his heart.

In fact, in the time and space he was in before, the main reason why the wheel motor was not widely used in the end was that it failed to effectively solve this problem. In other words, it fails to solve the problem of reducing costs under the premise of completing the entire power drive design in a small space.

In addition, the system integrates various functions such as drive, braking, and loading, and it is difficult to optimize the design; the internal space of the wheel is limited, and the power density performance of the motor is high, and the design is difficult; the integration of the motor and the wheel leads to a large unsprung mass, which deteriorates the suspension vibration isolation performance, and affects the vehicle handling and safety under uneven road driving conditions; the in-wheel motor will bear a large road impact load, and the motor vibration resistance requirements are harsh.

And the vehicle is prone to insufficient cooling under the condition of large load and low-speed climbing long slope, resulting in overheating and burning of the in-wheel motor; water and dirt in the wheel part are easy to collect, resulting in the corrosion and damage of the motor, and the reliability of the life is affected; the fluctuation of the operating torque of the in-wheel motor may cause vibration and noise of automobile tires, suspension and steering system.

And from the perspective of vehicle control, there are also many problems to be solved in the in-wheel motor drive, such as electronic differential control, traction control, yaw angle speed control of the car, etc. Wait!

However, even so, Li Fanyu still feels that if this driving method is realized, then the improvement of the handling and power performance of electric vehicles will bring earth-shaking changes!

After setting the general layout plan and driving form, the three scholars immediately took Li Fanyu's sketch and went back.

Now the R&D process of the R&D center has been very clear, and with the investment of Zhengxin in the R&D team, the teams of various well-known engineering universities in the past three years, as well as the training of highly educated technicians at the grassroots level, a very efficient and powerful R&D ecosystem has been formed. Therefore, he has rarely interfered in the specific matters in the development of some production cars.

For example, the Land Rover Discovery, which is about to roll off the assembly line, is completely a sketch of his appearance. The adventure includes the design of the general step, power and so on, all of which are made by the guys in the R&D center. It was found that it took less than half a year to finalize and pass the test of all the designs, and it will be ready for market in just over a week, which proves that the guys in the R&D center are also hanging now.

However, the R&D content this time is a bit special, and I was worried that those boys would not be able to handle it, so Li Fanyu still followed the three Xueba to Xu Compound's territory - Concept Car/Concept Lab.

This department is an unconventional department, which is not available in many car companies. But Zhengxin's R&D engineers are too distinctive...... In other words, the average age of R&D engineers is very low, and the collective brain hole is particularly large. Therefore, such a place has been set up to open your mind and make some concept cars that may not be realized at all.

Knowing that Li Fanyu was going to build a pure electric car that could compete with TSLPally, a group of guys who had just completed a round of research and development tasks and had nowhere to release their energy were very interested.

Especially when they saw the general layout and design given by Li Fanyu, everyone's mouths grinned.

"We've got this thing ready!" said a guy in a white lab coat who looked like Rintaro Okabe in "The Gate of the Stone of Destiny".

"Huh?" Li Fanyu raised his hand, "When is it, why don't I know?"

"Hey, hey, hey, brother, you don't come to the R&D center often now, and you don't know a lot of things. ”

"yes, just in the summer, after you started the I-bus, we started a project of our own. Study the future development direction of electric power. At that time, I also applied for special funding!"

"Yes, at that time, we made one, which was placed on the suspension spring, and installed a hub motor codenamed 'gyro' that does not move with the wheel hub and is driven by universal joints. Then I combined this motor with our super dissolved metal battery, and I also participated in Formula Student Race. ”

I see you guys mainly want to get involved in Formula Student Bastard!

Thinking of the consistent fun-loving and out-of-tune of these guys, and then looking at the funny expressions on everyone's faces, Li Fanyu was powerless to complain.

In order to stimulate the depth of the R&D center and the group's technical reserves, the group has given sufficient R&D funds for this type. Last year, nearly 700 million yuan was spent on supporting incubation research and development projects.

"Have you achieved results in Formula Student Formula?" Li Fanyu rubbed his temples and secretly felt sorry for his funds.

"Not really!"

The "Rentaro Okabe" smiled and replied very simply, "At that time, we didn't have a high-precision permanent magnet motor, and our electronic control system was not accurate enough, so the maximum speed of the car could not exceed 150KM/h. The speed was not enough, and the air compression system was not strong, which caused the dissolved metal battery to hang up at too high temperature.

Nima!

Li Fanyu suddenly wanted to hit someone.

"But brother, after the results of our rare earth permanent magnet motor technology some time ago, we have rearranged the layout of the 'gyro' hub motor. A major breakthrough has been made! I'm trying to apply for a patent these days!"

Li Fanyu's head jumped up, and "Okabe Rentaro" hurriedly waved his hand and explained.