Alexeyeva felt a chill. She had been in the East for many years. Of course, she also knew many habits of the East. Generally speaking, the performance of the East's personal use was lower, and exports must use good products. This is true in almost all walks of life. Only

The Mingzhou Group is an exception here. No matter what it is, the ones for personal use are much better than those for export.

This may be the difference between companies with a military background and other companies.

Alexeyeva said nothing, just watched silently.

"Then just tinker with it like this first. After selling it, you can also gain some operational experience from customers, continuously accumulate usage data during operation, and then make improvements."

Zhao Gang nodded: "We think so too, and we can only do so much at the moment. However, what should be allocated will still be provided, especially kinetic energy recovery."

For fuel vehicles, when going downhill or braking, the most important thing is to consume less fuel. The EFI engine can control the fuel injection through the ECU. When encountering a downhill section, it can control the injection of less fuel, or even

Without spraying, just use the engine as a reverse brake throughout the process. In this process, fuel consumption will be very small.

However, this only reduces consumption and cannot accumulate the energy consumed in this process.

Only electric cars can do this.

For electric vehicles, cruising range is a big indicator. It would be absolutely wonderful if the battery could be charged in reverse while the vehicle was running.

This operation is kinetic energy recovery. As long as the car slows down or goes downhill, the car can drive the motor to rotate. At this time, the motor becomes a generator, which not only provides powerful deceleration torque, but also generates electricity.

It is passed to the supercapacitor on the car, and then through the buffer of the supercapacitor, the current is stably charged to the battery.

If you go downhill for tens of kilometers, the battery capacity is only half. After going down the slope, the battery capacity may be full.

This is a stunt that only electric vehicles can do.

For heavy-duty trucks, this kinetic energy recovery is also very important.

"Currently, our heavy-duty truck has three different battery configurations, providing 282kWh, 350kWh, and 423kWh. The endurance is 160km, 200km, and 245km respectively. Even the version with the largest battery has a endurance that is not as good as that of a fuel vehicle.

Half of that, so the kinetic energy recovery of this kind of heavy truck is even more critical, and can significantly increase the cruising range."

The endurance of a normal fuel truck is at least five to six hundred kilometers. If you get a large fuel tank, it can even increase the endurance to more than a thousand kilometers. This gives the fuel truck greater flexibility. When transporting long distances, which province has the best fuel price?

At the lowest, fill up the tank in which province.

Now, after hearing these introductions, Qin Tao nodded frequently, and then he thought of something: "What kind of brakes do electric trucks like ours use?"

Electric vehicles not only need to change the power system, but also many other systems. For example, the air-conditioning system must be changed to an electric air-conditioner. Cooling is easy to say. When heating, the heating plate is directly used to provide heat, which consumes less electricity.

Swish, this is not as good as a fuel vehicle. After all, a fuel vehicle uses the waste heat of the engine for heating, so there is no need to consume additional energy at all.

At the same time, there are also big problems with the brakes.

The brakes of ordinary vehicles use the vacuum generated when the engine takes in air to provide assistance, which can make it easier to brake. Heavy trucks use air pressure brakes. The engine of the car is directly equipped with an air pump, which continuously pumps the brakes.

The air pipe of the brake system is inflated, so what about the brakes of the electric truck? Should we also get an additional electric air pump?

"Currently, we are equipped with an additional electric air pump on the brake system, which constantly monitors the air pressure of the entire brake system. As long as the air pressure is insufficient, the air pump will be started. Since we have kinetic energy recovery, during small-force braking, we completely rely on

Our kinetic energy is recovered to decelerate, and only when braking is needed, the driver needs to step on the brake pedal." Zhao Gang continued: "The same goes for the steering gear. We directly outsourced Bosch's electro-hydraulic steering system, and directly

It can be matched to the truck.”

Not only the engine is needed for braking, but also steering. The steering system of cars has developed to electronic power assist, which has a more relaxed working environment than hydraulic power assist. The steering torque is large at low speeds and small at high speeds.

Since truck steering systems require high power, hydraulic steering gears are generally used. Bosch first developed electro-hydraulic power steering technology. This was not originally intended to replace hydraulic power steering, but to complement the hydraulic power steering system.

In the event of failure, the torque superposition of the electronic control unit helps the vehicle meet the emergency steering requirements.

Now, this system has matured and can control vehicle steering without hydraulic assistance, so it can be directly transplanted.

"Of course, these are all temporary. When we are free in the future, we will develop our own electronic control system. Whether it is braking or steering, it can be controlled by the electronic system."

Electromagnetic catapults can be made. As long as the above technology is transplanted, electromagnetic brakes can be made in minutes, but they can't take care of it yet.

Qin Tao nodded: "Yes, these trucks are also used by black uncles anyway. The technology does not need to be too high, but they must be strong and withstand violent driving."

After watching the electric truck, Qin Tao is still able to accept this kind of electric truck that replaces oil with electricity. After all, this is just the beginning.

Qin Tao was still unfinished and wanted to say something, but when he saw Alexeyeva behind him, he suddenly thought of something: "We are here to talk about the electric jet system. Let's go back and continue coordinating this system."

"Mr. Qin, it's almost time. How about we go get something to eat first?" Zhao Gang looked at his watch and said to Qin Tao.

Qin Tao nodded: "Okay, let us try the food in your Golden Sun Company cafeteria."

"Go to the cafeteria? Mr. Qin, our company still has entertainment expenses. Since you are here, let's go to a restaurant outside for a meal together. The cafeteria is too shabby. When the machinist comes back, I will take you to the cafeteria.

, I’m afraid I’ll be unhappy.”

"It doesn't matter. I'm used to eating delicacies from the mountains and seas. I just want to eat something ordinary."

So, Zhao Gang had no choice but to take the big guys to the canteen.

It gets dark early in winter, and the lights are already starting to go off outside. Countless people in work clothes flock to the canteen. Qin Tao walks among them, inconspicuously.

As he approached the cafeteria, Qin Tao was surprised to see that these people actually had their stomachs straightened out, their waists bent backwards, their entire upper bodies almost flat, and they were walking forward like this, which looked very weird.

"What is this for?" Qin Tao asked curiously.

"Whether everyone is engaged in design or working on the production line, their waists are bent forward. Over time, it may be harmful to the spine. Therefore, we specially arranged this operation. Before going to the canteen to eat, everyone

You need to pass under those horizontal bar-like railings, so you can exercise your body."

Because it was dark, Qin Tao couldn't see clearly just now. Only after he got closer did he see these poles across the road. Anyone who wanted to eat could only pass through. Although if you wanted to cheat, you could bend forward, but everyone

Everyone was watching. No one had the nerve to do this. They just bent backwards and sometimes had to hold their legs with both hands. The posture was very unique, but the effect looked pretty good.

Qin Tao also became interested and decided to try it himself, so he bent his body backward, looked at the sky, lowered his body as much as possible, and slowly walked towards the first railing. Suddenly his foot slipped, and then, poof!

"Mr. Qin, are you okay?" Zhao Gang was very worried. Several female workers who were crawling through the railing next to him were actually giggling.

"It's okay." Qin Tao said: "The biggest gain from coming here today is that I know that my body is not as good as these employees. When I go back in the future, I will strengthen my exercise."

After saying that, Qin Tao looked at Zhao Ling behind him: "Xiao Ling, give me an hour of physical exercise time every day from now on."

"Yes." Zhao Ling nodded. She was also happy to see Qin Tao's request. Exercise is a good habit that should be developed.

"Mr. Qin, I will take you." Xu Zhengyang said, "Just exercise with me every day."

Qin Tao doesn't need to go to a gym, there is a ready-made coach beside him.

There are a lot of people in the cafeteria, all queuing up to get their meals in an orderly manner. However, there is still no credit card system for getting meals here. Everyone receives a plate and goes to the front to get their meal, and they all get the same meal.

"The portions are the same, but if you are not full, you can eat again." Zhao Gang introduced: "This can also avoid waste. At the same time, there are only a few recipes, and it is easy for the chefs in the cafeteria to make them."

Qin Tao nodded: "Your cafeteria needs to learn from your brother units, but the tricks on the way to the cafeteria are good and can be promoted. When the group meeting is held at the end of the year, you will report your tricks."

"Yes." Zhao Gang was also very happy.

One portion of stewed meat with potato cubes, one portion of scrambled eggs with tomatoes, one portion of bean sprouts, and one portion of rice. Overall, the food was acceptable, but the variety was very monotonous.

Several people each took a meal and then sat down to eat together.

"Mr. Qin, speaking of this ducted propeller, it is not our company's strength. We are just most familiar with motors. If we want to make it, we have to cooperate with our brother units. However, when we are doing pump injection,

Also know some of the benefits of ducted propellers.”

Pump spray is a ducted propeller. A cylinder is wrapped around the propeller, which forms a duct. Compared with the previous method, it can not only protect the propeller, but also increase the thrust of the propeller.

"At that time, we also talked about some of the benefits of ducted propellers used in the air." Zhao Gang continued: "The increase in ducts changes the slipstream field of the propeller, reduces the tip loss of the propeller, and improves the efficiency to a certain extent.

Regarding the aerodynamic efficiency of propellers, generally speaking, in order to manufacture ducted propellers, the size of the propeller will be reduced as much as possible, the speed of the propeller will be increased, and several propellers can even be stacked to eliminate the rotational torque by forward and reverse rotation."

There is a terrible problem in the propeller era: when the propeller rotates too fast, the propeller tip will stall. Especially when the speed is close to the speed of sound, the aerodynamic efficiency of the propeller will decrease rapidly. The ducted propeller is wrapped with a layer on the outside.

It greatly improves the aerodynamic environment of the propeller tip and increases the aerodynamic efficiency of the propeller.

"At the same time, as long as the design is good, the propeller suction flow can generate flow around the lip of the duct, forming a low-pressure area, causing the duct to generate additional pulling force. This pulling force can be up to more than twice the propeller pulling force. In other words,

The use of ducted propellers can increase the pulling force to twice the previous level."

In the era of propeller aircraft, when talking about power, we only talked about the horsepower of the engine, not the thrust of the propeller, because this is a very mysterious thing. When the benefits of ducted propellers were discovered, some aircraft designers designed the fuselage

I have a large fan and want to make the most of this design idea.

"At the same time, increasing the speed and reducing the windward area can also reduce drag."

"Well, overall, this kind of thing has great benefits. In this case, let's give it a try." Qin Tao said: "Is your Golden Sun Company taking the lead on this project, or should you find another company to take the lead?"

"Water pump factory, the lift fan they make is what you mentioned, but the lift fan uses a drive shaft. Just replace it with our motor. We will make whatever kind of motor they need.

.”

Qin Tao's eyes lit up, yes, why did he forget the water pump factory?

The water pump factory is just what everyone calls it privately. It has not only produced water pumps for a long time, but also various propeller propulsion devices, including the lift fan of the vertical take-off and landing engine. They made the lift fan and what Qin Tao thought of.

The power systems of these ground effect aircraft are very similar.

Therefore, you can go to them directly and ask them to help you figure it out.

Ground-effect aircraft have already solved the control problem under high sea conditions. As long as the engine is corroded by water vapor and salt at sea and the service life is improved, it will be completely mature.

Thinking of this, Qin Tao became excited: "After dinner, we will go to the water pump factory and call those who make lift fans to study together."

"Mr. Qin, you have been busy all day. Do you want to take a rest and go back tomorrow?" Alexeyeva asked. Although Qin Tao inspected electric heavy trucks midway, he still wanted to help her after all. She looked at

Qin Tao has been busy working on his project all day, and it's time to get off work. He is still busy, and feels a little sorry.

"Today's work is finished today, so we can't delay it." Qin Tao said: "I am usually too busy with work and have no time to take care of your project. Since I have intervened this time, of course I have to make proper arrangements."
To be continued...