Chapter 2883

If there are enthusiasts who refit the car, they know that when changing the car, refitting the wheel hub is the most common, but it is the most technical test. After changing a wheel hub, although it feels very stable, it is more bumpy.

Why?

There is a technical data called unsprung mass.

The wheels are not directly connected with the car body, so that people in the car have to bump to death. The middle is connected through soft connection, that is, the suspension system. There are criticized scooter suspension, advanced independent suspension, multi link is called advanced equipment, and so on. These can be collectively referred to as springs, which connect the wheels and the car body.

Unsprung mass refers to the motion mass of wheels, tires and related attached parts. It can be imagined that the smaller the weight, the better, because the smaller the mass, the easier it is to handle the spring, that is, the better the cushioning. It is reflected in the car, which is comfortable to ride.

The quality of the suspension system is an important implied indicator of the car. It is said that the car is four wheels and a big sofa. You can look at the deceleration belt. When Mercedes Benz exceeds the deceleration belt, the body is stable and motionless. This is the strength of the suspension system.

If the unsprung mass is very heavy, crossing a pit will cause the spring to move back and forth, and the vehicle body will shake obviously.

The unsprung mass of an ordinary car is mainly the wheel and brake system. If it becomes a hub motor, the motor will be stuffed into it. You know, the motor itself uses copper, permanent magnets and other metals, which are heavier than iron. Therefore, using a hub motor will have this important problem.

There are many other problems, such as heat dissipation. The hub motor is integrated in the hub, and the heat dissipation environment is poor, which is easy to cause the motor to overheat. Once the motor overheats, the permanent magnet demagnetizes, the motor burns down, and the space in the hub is limited, the motor cannot be particularly large. Finally, it is reliable. After all, the hub may have to wade in water and drive in special environments such as sand. In this way, the motor must have high quality.

For these reasons, it is difficult to put the wheel hub motor of the car into practical application. In fact, the first practical one is the electric bicycle. Almost all electric bicycles are the wheel hub motor on the rear wheel. The motor is inside the wheel hub. If you have seen the most primitive electric bicycle, you can recognize it through a small motor, Drive the chain on the rear pedal to drive it.

These problems are very complex, but they are not too big for heavy trucks, especially for super heavy trucks. Taking the most important unsprung quality as an example, it mainly affects the comfort of high-speed travel. However, the speed of this large transport vehicle can not be high at all. In addition, the suspension and spring of this super heavy truck are absolutely powerful, I don't care about the quality of one more motor at all.

This kind of super heavy truck, wide off-road tires, and the space inside the wheel hub is also large. It is enough to arrange the wheel hub motor, and there is no problem with heat dissipation. It is even possible to directly make the wheel hub into a heat sink.

Therefore, in that parallel space-time, heavy vehicles, including heavy trucks and large buses, are first used with hub motors.

Therefore, when Bara mentioned the hub motor, he was well prepared.

"Moreover, we can also optimize the system and add a set of batteries to the whole power system." he ribala said: "Because the engine always runs at full power, but the car does not necessarily need so much power. Therefore, when the car is running at low speed, the power can be converted into electricity and stored in the battery. Then, when the car needs power and the generator power is not enough, you can take energy from the battery for use. Moreover, when the car is running at low speed At high speed, you can use the hub motor to generate electricity and transfer it into the battery. These can improve the vehicle's mileage. "

He ribala's ideas are effective in improving the performance of their vehicles and greatly increasing the intelligence of their vehicles. However, similarly, it also means that Mars factory must cooperate with them, because they have not been involved in these. It is impossible to start from scratch.

"If the battery is added, the power of the engine can be reduced. We don't need to use this high-power gas turbine. I think it's enough to use our 700 horsepower diesel engine to drive a suitable generator." he ribala said: "in this way, under the same fuel carrying capacity, the mileage can soar significantly."

Why do they use gas turbines? It's because they have to have enough power to generate electricity for the car. But now, the use of hub motor can reduce the loss, increase the battery and improve the explosive power at the critical time. In this way, it's enough to reduce the power system.

Although the gas turbine has high power, it also consumes too much fuel. If it can be replaced with a diesel engine, the mileage can be doubled several times.

Musta listened carefully to these suggestions. Finally, the scholar said that using his own diesel engine is also a great advantage. It is a civil engine. Therefore, the service life of the engine is very long. Now, the high-power engine required by their vehicles can only be considered from the military engine. Although the power is large, the service life is too short, which is really chicken ribs.

The biggest civil diesel engine that can be used now is the one in the Han country, 700 horsepower.

"OK, let's do joint research and development." finally, musta weighed the left and right and made the decision: "let's develop this big Mac and become a special car that makes the world tremble."

Anyway, they only manufacture cars, and they don't care what the top is. However, just think about it briefly, we know that the most appropriate choice is to carry strategic ballistic missiles. This kind of size is still the largest equipment among all strategic missiles.

Let the world tremble!

Qin Guan nodded: "I also believe that we will lead the reform of this technology. When this project is developed, we can also use many other schemes. For example, we can occupy a place in super engineering vehicles and develop more civil markets. That kind of super mining vehicles can use this scheme."

If it's just military, the market is still very narrow. If you want to open up more markets, you have to deform. That kind of giant mine truck is also a very important application.

For example, when our three gorges dam was closed, we used this super engineering vehicle. By the way, this project should also be put on the agenda. Now, with the rapid economic development of Han country, the power gap is becoming larger and larger. It's time to carry out this super water conservancy project.