"Single-point EFI...... Multi-point EFI. Thomas whispered in his mouth, a few years ago when Volkswagen was developing electronic jetting, he was also involved in it, what Zhou Jingming said, literally is not difficult to understand, but in terms of technical principles, Thomas still needs to digest it.

"Mr. Zhou, can you briefly say that this so-called multi-point EFI, does he have any specific advantages?"

If the advantage of multi-point EFI is not much greater than that of single-point EFI, then Thomas feels that there is no need to do any more multi-point EFI.

Zhou Jingming did not rush to answer Thomas's question, but turned around and said a few words to Luo Yuzhong, after Luo Yuzhong listened, he ran out, and soon, Luo Yuzhong walked in with another person, this person is a translator assigned by the Economic Commission for the project, Zhou Jingming means that what he says next must also be understood by the Chinese technicians.

"Mr. Thomas, the reason why we want to replace carburetor injection with an EFI system is that carburetor injection is mechanically controlled, and there is no way to accurately and dynamically adjust the concentration of the mixture, which is very inconvenient for the driving environment with variable air pressure and temperature. In addition, carburetor injection does not have adaptive concentration adjustment, which leads to relatively high fuel consumption, and electronic injection can solve this problem to a certain extent, am I right?"

After the translator came, Zhou Jingming said with a smile.

The high fuel consumption is extremely obvious in the old Poussin's car, because the engine originally assembled by the Santana also used carburetor injection, but the price of oil was not so high at that time, and the sensitivity of countries to fuel consumption was not very high, so no one realized this.

But the latter thing, Luo Yuzhong they don't understand, but Zhou Jingming knows, after the oil crisis, international crude oil prices skyrocketed, governments around the world for car fuel consumption, this is the only way to pay attention, and, with the enhancement of environmental awareness, environmental regulations for car emissions requirements are becoming more and more stringent, carburetor injection is obviously not up to the requirements.

"Yes, Mr. Zhou is right. Thomas nodded and continued, "EFI uses microelectronic computer-controlled injection, which uses an air flow sensor to detect the amount of air intake, and can calculate the amount of fuel injection according to the amount of air intake, so as to achieve the effect of dynamically adjusting the amount of fuel injection and changing the concentration of fuel injection, to a certain extent, it can indeed improve the shortcomings of carburetor injection." ”

The conversation between Zhou Jingming and Thomas, after the translation was transmitted to several Chinese technicians, several people couldn't help but show a look of thinking, before that, they didn't know much about electronic jetting, and they were not very clear about the advantages of EFI.

"Compared to carburetor injection, electronic injection can be precisely controlled, which carburetor injection is far from being able to achieve. Zhou Jingming nodded.

At this time, Thomas was even more curious, since single-point EFI has been able to improve the shortcomings of carburetor injection, what is the significance of Zhou Jingming's "multi-point EFI"?

"Mr. Zhou, forgive me for being stupid, I still haven't understood what you said about multi-point EFI, what is the significance of research, whether it is theoretical value or practical value. ”

Zhou Jingming smiled, and then replied, "There is only one fuel injector for single-point EFI inside the engine, but has Mr. Thomas ever thought that there is a difference in the length and position of the intake manifold of the engine, and after the fuel injection, there will be an error in the mixture entering the cylinder, which will lead to a difference in the combustion conditions of each cylinder, in a sense, this is no different from the carburetor." ”

As soon as Zhou Jingming said this, Thomas immediately fell into deep thought, compared with the Chinese personnel, he was fully involved in the development of electronic jetting, and naturally had a deeper understanding of the problems Zhou Jingming said.

"Do you mean to put multiple injectors inside the engine, one in front of each cylinder intake?" Thomas quickly grabbed a pen and paper and drew a simple diagram on the paper.

"That's right, the general idea is that multiple injectors can calculate the amount of fuel injected separately according to the different air intake, which realizes more accurate control. Zhou Jingming replied with a smile, it is much easier to talk to professionals.

"Not only that!" Thomas even stood up excitedly, "multi-point injection can be injected according to the timing time of the engine, and the ignition time can be precisely controlled, so that the air-fuel ratio of the engine can be further improved, and the fuel consumption and emissions will be further improved on the basis of single-point EFI!"

Looking at Thomas, who was so excited, Zhou Jingming smiled heartily, "In this case, Mr. Thomas, do you agree with my plan?"

Compared with single EFI, the advantages of multi-point EFI are indeed obvious. Thomas nodded seriously, but then said with some worry, "Multi-point injection seems to only add a few fuel injectors, but the difficulty of research and development is much higher than that of single-point EFI, in this case, our progress may be slowed down." ”

There are many technical problems that are not as simple as one plus one equals two.

"Please rest assured that Bosch will also join in the research and development of multi-point EFI. Zhou Jingming said with a smile.

"Are you saying that our Bosch in Germany, they will also join us in the joint development of multi-point jets?" Thomas immediately asked excitedly.

Bosch is far ahead of Volkswagen in terms of engine injection systems!

"That's right, their technicians will come to Shencheng in a few days, and then we'll have further discussions, what do you think?"

"Of course, with the addition of Bosch, then our progress will be much faster! And in terms of electronic control, we can also achieve more accurate control!" Thomas looked at Zhou Jingming's gaze, as if looking at the savior, Bosch is such a difficult object, but also invited!

After Zhou Jingming left, Li Mingzhe also called Li Minghai of the Economic Commission for the first time, and after explaining the reason, Li Minghai also immediately communicated with Bosch, because he was eager to enter the Chinese market, Bosch agreed to the Chinese side's request without putting forward too many conditions, and flew to Shencheng on the third day.

In this way, Volkswagen, Bosch, and the Chinese side, a total of three people, under the auspices of Li Mingzhe, held a formal meeting, for Zhou Jingming's idea of developing a multi-point EFI system, the three parties also reached an agreement, and are ready to determine the preliminary technical plan in the next month.

A VR6 engine that is different from its predecessor is gradually taking shape.

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