But there are also some models that require rear-wheel drive and four-wheel drive. Rear drive is further divided into engine front rear drive and engine rear rear wheel drive.

The engine rear rear wheel drive is generally used in sports cars, and the engine front rear drive is used in some luxury cars and commercial vehicles.

Four-wheel drive is generally used by off-road vehicles and some luxury cars.

But these are purely mechanical techniques, and we don't use their methods, but we have to find another way.

First of all, the engine is rear-mounted rear-wheel drive, which we do not consider. Although it also has many advantages, we are a new company and it is not suitable to add too many technical tasks.

The front engine drive is the oldest drive technology, and therefore the most mature drive technology, which is suitable for new companies like ours to learn from.

So how do you solve the problem with rear-wheel drive technology and four-wheel drive technology? My idea is to add a brushless DC motor to the rear axle and a set of high-energy rechargeable batteries. It is very simple to solve the problem of purely mechanical rear drive.

Another advantage is that the torque of the motor and the fuel engine of the same power is much larger than that of the fuel engine. As a result, a car powered by an electric motor can start faster. The rear axle and front axle are coordinated by software to achieve the purpose of four-wheel drive.

Therefore, we actually only have two drive technologies, the first is the traditional engine front drive technology, and the second is the hybrid drive technology. The second of these is only available on top-of-the-line luxury vehicles or off-road vehicles. Because of the hybrid drive of oil and electricity now, the cost will rise, and ordinary cars cannot be sold at this price.

Okay, that's it for the drive system, let's talk about the brake system. Our braking system only uses two braking technologies, four-wheel disc brakes and drum brakes, four-wheel disc brakes for small cars, and drum brakes for medium and large cars.

Drum brake technology is said to be old technology, we copy it, but disc brake technology is just emerging, we should pay attention not to infringe on other people's patents, can bypass the patent, try to bypass. Some patents that cannot be bypassed, we have to go to them to license or transfer. If someone else refuses, we can go to court with them or make a special statement, and at that point, we will be justified in infringing their patents.

In terms of brake technology, there is a technology, Europe and the United States put forward a theory as early as the twenties and thirties, and even the German Bosch company applied for a patent in 1936, but due to technical reasons, there is no real practicality, that is, automobile braking anti-lock technology.

In an emergency, the driver will generally step on the brakes, then the brake disc will lock the wheels, there is no problem when the car is driving at low speed, but if the car is driving at high speed, due to the huge inertia of the car, it will cause traffic accidents such as traverse, tail flicking, and rollover. In order to solve this problem, some people have thought of continuous braking technology, that is, in a very short time, about 60 to 120 times per second repeated braking release action, can solve the problem of wheel locking. But this technique is difficult or impossible to do in a purely mechanical way. But since the rise of microelectronics, there have been automotive companies that have thought of this technology. Therefore, we want to invent this technology before them and apply for international patents. This is done by adding a software-controlled solenoid valve, which can perform 60 to 120 repetitive brake releases per second. The transformation of pure mechanical brake technology into microelectronic control electromechanical control technology solves the problems of predecessors.

Foreign countries refer to this technology as ABS, and ABS technology derives wheel anti-slip technology and body stability technology. Both technologies have a premise, that is, the vehicle must have an ABS anti-lock braking system.

Wheel anti-slip technology is that when the vehicle makes a sharp turn at high speed, the steering wheel is corrected many times in a short period of time. This technology should be studied in conjunction with our electronic power steering system. I will only tell you the principle, how to achieve the purpose of anti-slip, and ask you to continue experimenting.

Body stabilization technology is also a technology that keeps the car stable and prevents rollover when making sharp turns at high speeds, or it is a technology that makes the driver and passengers feel stable. This technology needs to be combined with our intelligent damping technology to make this possible. For example, we can reduce or close the oil outlet of the hydraulic shock absorber on the outside when the vehicle is turning, and at the same time increase the oil outlet of the hydraulic shock absorber on the inside, so as to form a high on the outside and low on the inside, so it plays a role in stabilizing the body to prevent rollover. This also requires many experiments to collect data to make a data database, in order to truly achieve the purpose of anti-rollover.

I basically finished talking about the key technologies on the chassis, and there are many safety assistance technologies on the body, such as reversing radar technology, front radar collision avoidance technology, automotive wireless communication technology, vehicle integrated management technology, etc. Because it's not about the chassis, I'll tell you about it later.

In addition, in order to speed up the experiment, the technical team in charge of the research of each system can buy a car of the same size for partial modification and then do the experiment. For example, braking systems, steering systems, shock absorption systems and some safety assistance technologies can be experimented with using other people's cars. Don't be afraid to spend money, time is the most important thing. ”

Speaking of this, Shen Danqing stopped speaking, and saw that everyone was working hard to write, so he deliberately waited for a while, and when everyone had taken notes, he stood up and announced: "Okay! That's all I have to say, except for the new technology I talked about, you can copy or learn from other people's mature technology." Adjourned!"

After announcing the adjournment of the meeting, Shen Danqing turned around and left the conference room in great strides. His task has been completed, he has done what he has to do, whether he can realize his idea or not, it depends on the subordinate engineers.

Originally, it was possible to study both automobile engines and transmissions at the same time, but due to the lack of manpower, we had to wait for a later study. However, automotive material technology can be studied in the same way, because their technical strength has not been used until now.

Shen Danqing didn't rush back to the company when he thought of this, but went to the Institute of Metal Materials. The director of the Institute of Metal Materials used to be Liu Zhihong, who had the same name as the minister of the camera division, and later went to the technical information department as the director, so Wang Chaoqun replaced Liu Zhihong as the director.

Since there was no prior notice, when Shen Danqing arrived at the Institute of Metal Materials, no one knew about it, and no one greeted him. Shen Danqing was basically familiar with his research institutes, so he went directly to Wang Chaoqun's director's office.

The Institute of Metal Materials is a large institute, and they study a lot of fields, so there are now more than 500 researchers. The scale of the institute was very large, and Shen Danqing walked for nearly ten minutes to arrive at Wang Chaoqun's office.

Wang Chaoqun was nominated by the former director Liu Zhihong and appointed by Shen Danqing himself, so his qualifications are not too old but older than most research directors. He usually works in his office and occasionally goes down to the lab to check on the situation.

This time, Shen Danqing was lucky and happened to catch him in the office.

"Boss," Wang Chaoqun said in surprise as he looked at Shen Danqing who pushed the door in. He is the least conspicuous of all the research institutes, and since Changsheng Investment Group has not yet established a heavy industry enterprise, there are not many requirements for metal materials. The only exception is the gas turbine generator set, the special steel materials used, which are all orders from Guo Dong, who is the head of the gas turbine generator unit division. So it was almost difficult for him to see his boss, and now the boss actually came to him in person. Therefore, Wang Chaoqun immediately stood up in a panic and walked over to Shen Danqing, bowed to Shen Danqing, and invited him: "Boss, please take a seat." ”

Shen Danqing waved his hand with a smile and said, "Director Wang, you're welcome, I'll leave after a few words."

You may not know that the company is designing car props, which are the car props used in filming, which are 1:1 ratio to real cars, and they must also be able to drive normally, but there are no high requirements for maturity. So it's up to you to provide the materials you use to build the car.

Materials such as thin steel sheets for making automobiles, because of the limited time, I don't want you to study them. Now there are two materials for you to study, the first is the aluminum-magnesium alloy material used in aluminum alloy automobile wheels. The second is the aluminum alloy material used in automobile engines.

There may be some special material for you to study, but I don't know yet. Let's study those two materials for now!

Is there a problem? Saying his request this time, Shen Danqing finally asked Wang Chaoqun very formally.

Just kidding, at this moment, if there is a problem, it will become no problem. He didn't have the courage to oppose the boss's request, and he had to find a way to solve any problems. Therefore, Wang Chaoqun immediately replied categorically: "Boss, there is no problem." ”

Shen Danqing saw Wang Chaoqun's statement, nodded with satisfaction and said, "Well, it's good that you have determination, I'll wait for your good news." ”

After speaking, Shen Danqing turned around and walked out without even saying hello. Wang Chaoqun hurriedly followed behind to see him off, and when he saw the boss get in the car and leave, he turned around and returned to the office to arrange the R&D task.

After getting into the car, Shen Danqing ordered Secretary Liu in a light tone: "Go to the Institute of Non-metallic Materials." ”

"Hey!" Secretary Liu answered, and started the car and set off.

When he arrived at the Institute of Non-metallic Materials, Shen Danqing also went to Zhang Xiangdong's office alone.

The Institute of Non-Metallic Materials is also a large institute, and there are many research topics under it, so he is mainly responsible for administration and coordination. Shen Danqing was also arrested. However, he is the oldest and often meets with his boss, so when Shen Danqing pushed his office open and walked in, he did not panic. But he also stood up and asked him suspiciously, "Boss, why are you free to come to me today." ”

"Nothing else, I'm just going to tell you by the way, the company is developing cars, and many new materials will be used in cars to insulate heat, sound, reduce weight, etc., you have to find out, and see where you need to provide materials, so you can know it as soon as possible. ”

"Oh! I see. Boss, please take a seat. Zhang Xiangdong walked out of the desk and walked to Shen Danqing's side and said.

Shen Danqing waved his hand and said, "No, I have to go to other research institutes." Goodbye!" After speaking, he left without waiting for Zhang Xiangdong to say more.

To be continued......

It's been a busy day today, so I didn't rush out until now, I'm sorry!