All round car designer

Chapter 29 Xu Nan's Shock

Because he returned to school nearly two months earlier, this time, Zhou Fei could easily buy a sleeper berth, and it was a very sought-after lower berth.

After lying down for more than ten hours, Zhou Fei finally arrived in Chuncheng again.

Since there are not many students staying in the school during the summer vacation, except for the team members, there are only a group of graduate students. For the convenience of management, the school stipulates that the undergraduate students who stay in school must move to another apartment.

Zhou Fei is not used to sleeping in other people's beds, and his current apartment is not closed, and the dorm manager commutes as usual every day, so Zhou Fei did not move out, and still stayed in his dormitory.

After a simple cleaning, Zhou Fei officially started working.

Before returning home, Zhou Fei had already completed the structural analysis of the CRT single-cylinder engine. To be honest, the internal structure of the engine is similar no matter whether it is a single-cylinder engine or a four-cylinder engine. Having solved a similar engine, it is not difficult for Zhou Fei to figure out the internal structure of the CRT single-cylinder engine.

What's more, Zhou Fei didn't intend to figure out every part of this engine, he was just preparing for the subsequent addition of an electronic fuel injection system.

Although Zhou Fei is not an expert in engines and does not know much about EFI systems, fortunately, the system has prepared a detailed database for him. What Zhou Fei has to do is to conduct targeted learning according to his own needs. up.

Taking advantage of the first day at school, Zhou Fei systematically learned about electronic jetting.

In the initial period of automobile development, carburetor injection occupied an absolute market. At that time, carburetor was called the "heart" of the engine, and its importance can be imagined.

The working principle of the carburetor is very simple, that is, under the action of the vacuum generated by the engine, a certain proportion of air and gasoline are mixed, and then injected into the combustion chamber of the engine, so as to output power for the engine.

However, the disadvantages of the carburetor are also very obvious. First of all, as a purely mechanical device, its control is not precise enough, and it cannot quickly respond to changes in engine load during normal driving. Insufficient combustion, the content of harmful substances in the exhaust emissions exceeds the standard.

In Zhou Fei's previous life, due to the high fuel consumption and high exhaust pollution of carburetors, they were eliminated from the market long ago, and the electronic injection that Zhou Fei was learning to replace the carburetor injection.

The so-called electronic injection is to use sensors and electronic control components to directly inject mixed combustibles into the combustion chamber. Due to the addition of electronic control components, electronic injection greatly improves the shortcomings of carburetor injection, making its control more precise and rigid. As soon as it was launched, it was welcomed by the market.

According to the number of injection points, electronic injection is subdivided into single-point EFI and multi-point EFI. Single-point EFI is to install an injector at the position of the original carburetor, and multi-point EFI is An injector is installed at each air inlet.

Due to time constraints, Zhou Fei only planned to transform this single-cylinder engine into a single-point EFI this time.

In fact, the world is already in the transition stage from carburetors to electronic injection, but no one has made a systematic summary of the theoretical part of electronic injection, so Zhou Fei this time, also by the way, the world's car Industry went one step further.

With the theoretical basis, the next step is to carry out physical design for the whole set of EFI system, and at the same time carry out corresponding transformation on the structure of the engine.

For Zhou Fei, this is definitely a big project!

The first thing Zhou Fei has to solve is the design of sensors and electronic control units. In terms of electronics, Zhou Fei is completely a layman. Fortunately, the electronic technology in this world is very developed. , draw the circuit diagram of the entire device, and leave the rest to a professional manufacturer for production.

As for the sensor, it can be purchased according to your own needs, and there is no need to design it separately.

In this way, Zhou Fei's original work intensity was greatly simplified.

In less than five days, Zhou Fei completed all the design work of the EFI system, leaving only some design instructions that have not yet been completed.

It took another two days for Zhou Fei to complete the drawing of the EFI system assembly drawing and the [-]D models and [-]D drawings of each part.

In this way, Zhou Fei has everything from the drawings to the design instructions, and the rest of the work is to hand over the drawings to the corresponding manufacturers, and let these manufacturers process them according to the technical requirements on the drawings.

And for this, Xu Nan's help is needed.

***
As a postgraduate tutor of the Institute of Automotive Engineering, Xu Nan does not have a clear holiday time. Although there are many other teachers in his team to help, he does not have to worry about the matter of leading graduate students, but in the general direction of research, it is still necessary He was in charge, so whenever he had time, Xu Nan would still come to the lab.

"What the hell is this Zhou Fei doing? Why hasn't there been any movement after so long? Could it be that he has given up his work as a team?"

Xu Nan, who was sitting in the office, was looking at a foreign document, suddenly remembered this matter, and couldn't help talking to himself.

Another team of the Automotive Academy, the Jisu Racing Team, has already started training ten days ago, fully preparing for this year's formula competition. It is said that the basic plan has been determined and the previous generation of racing cars is currently being remodeled.

On the contrary, the Mercedes-Benz team, which keeps saying that they want to win this year's championship, has not moved at all until now.

This Zhou Fei, no matter how you look at it, doesn't look like a person who can only draw big cakes.

"I really believed what Zhou Fei said." Thinking of this, Xu Nan couldn't help laughing.

Not to mention anything else, it is a question of whether the "team" of two people in Mercedes-Benz can design a complete racing car, let alone win the championship?

Just as Xu Nan was thinking, the mobile phone that was placed aside suddenly rang, and when she picked it up, it was none other than Zhou Fei who she was talking about just now!

"Mr. Xu, are you in school? I just finished the engine remodeling, and I would like to ask you to help find a manufacturer to produce related parts."

As soon as the phone was connected, Zhou Fei's voice came.

"I'm in the laboratory, come over here." Xu Nan didn't say anything else, but he was deeply skeptical about Zhou Fei's words of "completing the engine modification". What modifications were made to the engine.

Modifying the engine is not as simple as disassembling and assembling the engine. There is a lot of knowledge involved in it.

Not long after, Zhou Fei found Xu Nan with a computer on his back.

"I thought you had given up on the team completely. You haven't heard anything for such a long time." Xu Nan couldn't help teasing.

"That's not possible." Zhou Fei scratched his head with a smile, "I went home a few days ago, so I started working right after I got back."

Zhou Fei said while turning on the computer, and pointed the screen at Xu Nan, "Mr. Xu, this is the injection system I newly designed for the CRT engine. There are mainly these parts that need special processing. One is the fuel injector. , and this electronic control unit..."

Xu Nan didn't take Zhou Fei's restructuring to heart at first, but when he saw the icon on the screen, he couldn't move his eyes any longer.

"This...is this designed by you independently?" Xu Nan's voice was full of shock.

(End of this chapter)