Automotive Black Technology Chapter 1034: : “Gyro” hub motor!

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This thing Li Fanyu came up with is actually not a new thing.

The concept of being driven by a wheel hub motor or a wheel edge motor has been proposed a long time ago. It is the legendary independent drive electric vehicle, or distributed drive electric vehicle.

In fact, whether it is in the time and space before the automobile history process has not changed or now, cars with this driving method have been a hot topic in various universities and car company laboratories for some time.

But in the end, this thing was not put on the market on a large scale.

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

Due to the huge weight of the Shanshan mine car, if it starts with only the Shanshen engine, one is that the starting speed is slow, and the second is because at that time, I wanted to make an armed mine car that can be fast under high weight. , so acceleration performance is also an aspect that needs to be considered.

If normal mechanical transmission and hydraulic transmission are used, the internal transmission structure will be too complex and cost and reliability cannot be guaranteed. So at that time, Li Fanyu didn't want it to be troublesome, so he directly changed the power structure into a diesel engine to generate electricity, and used electric transmission to convert the kinetic energy into driving the motors on the four sets of tires. The motor has the characteristics of large torque and wide range without the need for a transmission structure to achieve mountain-shaking power and speed.

But the situation of Shanshan is different from now. After all, one wheel of Shanshan can fit five adults.

Now in such a small space, parts such as motor, suspension and power recovery are arranged. The one with Shaking Mountain is undoubtedly the difference between snow sculptures and miniature sculptures.

Li Fanyu knew this very well.

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

In addition, the system integrates driving, braking, load-bearing and other functions, making it difficult to optimize the design; the internal space of the wheel is limited, and the requirements for motor power density and performance are high, making the design difficult; the integration of the motor and the wheel This results in a larger unsprung mass, worsens the suspension vibration isolation performance, and affects vehicle controllability and safety on uneven road conditions; the wheel hub motor will bear a large road impact load, and the motor's anti-vibration requirements are stringent.

Insufficient cooling may occur when the vehicle is climbing long slopes at low speed and heavy load, resulting in overheating and burning of the wheel hub motor; water and dirt can easily accumulate in the wheel area, causing corrosion damage to the motor and affecting life reliability; Fluctuations in the running torque of the in-wheel motor may cause vibration and noise in the car's tires, suspension and steering system.

And from the perspective of vehicle control, there are many problems that need to be solved in wheel hub motor drive; such as electronic differential control, traction control, car's yaw rate control, etc... etc!

But even so, Li Fanyu still feels that if this driving method is realized, it will bring about earth-shaking changes in the control, power and other performance improvements of electric vehicles!

After deciding on the general layout plan and driving form, the three top students immediately went back with Li Fanyu's sketch.

Now the R&D process of the R&D center is very clear, and with Zhengxin’s investment in the R&D team, the teams of various well-known engineering universities, and the training of grassroots highly educated technicians in the past three years, a very efficient and powerful system has been formed. R&D ecosystem. Therefore, he has rarely intervened in specific matters related to the development of mass-produced cars.

For example, for the Land Rover Discovery that is about to roll off the production line, he just made a sketch of its appearance. The design of Qiyu, including the overall steps, power, etc., were all made by the guys in the R&D center. It was found that it took less than half a year to finalize all the designs and pass the test, and it will be available on the market in more than a week. This proves that the guys in the R&D center are also very nervous now.

However, the research and development content this time was a bit special, and because he was worried that the boys would not be able to handle it, Li Fanyu followed the three top students to Xu Fufang's site, the Concept Car/Idea Laboratory.

This department is an unconventional department that does not exist in many car companies. But Zhengxin's R&D engineers are so unique... In other words, the average age of R&D engineers is very low, and their collective brainpower is very big. Therefore, a place was specially set up to open up imagination and make some concept cars that may not be realized at all.

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

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

“We have this thing ready-made!” A guy in a white coat who looked like Rintaro Okabe from Steins;Gate grinned.

"Ah?" Li Fanyu raised his hand, "Why didn't I know when it happened?"

"Hey hey hey, senior brother, you don't come to the R&D center often now, there are so many things you don't know."

"Yes, during your summer, after building the I-type bus, we organized a project ourselves to study the future development direction of electric power. We even applied for special funds at that time!"

"Yes, at that time we made one, which was placed on the suspension spring and equipped with a wheel hub motor code-named 'gyro' that did not move with the wheel hub and was driven by a universal joint. Then we used this motor to follow our The combination of super molten metal batteries also participated in the student equation."

I think you mainly want to participate in Formula Student, you bastards!

Reminiscent of the fact that these guys were always playful and out of tune, and looking at the funny expressions on everyone's faces, Li Fanyu couldn't complain.

In order to stimulate the depth of the research and development center's topics and the group's technical reserves, the group has provided ample funding for this type of research and development. Last year, nearly 700 million was spent on supporting funds for incubation research and development projects.

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

"No!"

That "Okabe Rintaro" chuckled and answered simply, "We did not have high-precision permanent magnet motors at that time, and our electronic control system was not precise 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 enough, causing the molten metal battery to overheat and die."

Nah!

Li Fanyu suddenly wanted to hit someone.

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

A blue vein popped up on Li Fanyu's forehead. "Rintaro Okabe" quickly waved his hand and explained.