Set sail1992

Chapter 859 Do whatever you want, at your fingertips
Seeing everyone's astonishment, Professor Xu Qingwu smiled and said, "I can explain this."

After a pause, under the gaze of everyone, he went on to say: "The four engines of Huateng Group are actually a coincidence. After the prototype was produced, everyone felt that the displacement of 4 cc per cylinder was very awkward. Later, After calculation, everyone thinks that in terms of combustion efficiency, the single-cylinder 562.5 cc is the best, but from the perspective of torque output, the single-cylinder 500 cc is more powerful. Whether to choose the single-cylinder 600 cc or the single-cylinder 500 cc, everyone has always been Arguing endlessly.

Later, this situation was reported to the general manager's office of the group. After seeing the situation, Xiao Zhang immediately decided: In the case of different cylinder bores, by changing the piston stroke, two displacements of 500 ml and 600 ml were produced. , corresponding to two V4.0 engines of 4.8 liters and 8 liters, which are used for the high-low matching of high-end models.

After cutting off two cylinders of these two engines, it becomes a 3.0-displacement V6 and a 3.6-displacement V6, which is also convenient for high-low matching. "

On this occasion, Professor Xu Qingwu still gave his students considerable respect, and did not call Zhang Qihang "my student" or "Xiao Zhang" just because he was his student.

After hearing what Xu Qingwu said, everyone had only one thought: Nima!I really have a lot of experience, can I still play like this? !
Of course, you can play like this. It’s hard to give an example that is too partial. Let’s take Volkswagen’s famous EA888 engine as an example: EA888 used to have two displacement versions of 1.8 and 2.0. The cylinder bores of these two engines are the same. Both are 82.5mm.

Since the cylinder diameters are the same, why are there two displacements?

The reason lies in the stroke of the piston.

1.8排量EA888发动机的活塞行程为84.1毫米，而2.0排量的EA888发动机的活塞行程为92.8毫米。

In this way, two different displacements can be realized without only replacing the piston and basically no need to modify the structure of the engine, which is more convenient for the company's pricing strategy and realizes high-low matching.

This method was moved by Zhang Qihang to this V8 engine developed on the basis of Mitsubishi 80A8. Finally, two displacements were achieved by adjusting the piston stroke, and by "cutting off" two cylinders on one side, the most Simple and rude, but also the most direct and effective way to obtain two V6 engines, but in fact, these 4 engines are still one engine in the final analysis.

Everyone present is the top expert in the automotive industry. Although everyone used to learn from cats and tigers and 1:1 "reverse" learning when they were working on engines, this does not prevent everyone from understanding Zhang Qihang's words, but it is also because everyone understands After seeing what Zhang Qihang said in his words, he felt even more emotional.Just like what Sun Yaohua said with a look of shock and emotion: "Single-cylinder displacement of 500 cc and 600 cc, cutting off two cylinders... These words are simple, as if they are just a matter of mouth, but How can it be so easy to do?"

No one disagrees with this statement.

You know, the domestic auto industry at this stage cannot be summed up as a "weak industrial foundation". What about Huateng Industrial Group and Zhang Qihang?Their level and accomplishments in engines have reached the point where they can do whatever they want. Just judging from what they said, they are already a few levels ahead of their domestic counterparts!
At this moment, everyone couldn't help thinking that "it's true that people are more dead than others, and goods are better than goods". It's just that, everyone's... these four engines of Huateng Industrial Group will inevitably become more and more serious. Get curious.

How could Professor Xu Qingwu not understand the meaning of his old friends?Standing up with a smile: "Everyone, since you're all here, why don't you go and have a look together?"

The phrase "It's all here" is really easy to use, not to mention that everyone already meant it, everyone naturally responded one after another, and some comrades even couldn't wait.

………………

When he came to the power laboratory of the research center, Zhang Qihang pointed to a row of engines being tested on the bench and introduced them to the professors and engineers of the EFI research group: "Everyone, this is the brand new engine that Huateng Industrial Group is testing. Displacement engines are named 6A30, 6A36, 8A40 and 8A48 according to the number of cylinders and displacement, and the power per liter of these engines has reached 45 kilowatts per liter, and the horsepower-torque ratio is 1:1.472..."

"what?!"

Before Zhang Qihang finished speaking, Professor Sun Yaohua stepped forward excitedly, and said in shock: "Mr. Zhang, what is the power-up of your engine?"

Not only Professor Sun Yaohua was very excited, but other professors and experts were equally excited, so excited that they even wondered if they heard it wrong.

Zhang Qihang understood why everyone reacted like this, and nodded with a smile: "Professor Sun, you heard me right, the liter power is 45 kilowatts per liter."

The so-called power per liter is a relatively basic indicator of the engine, that is, how much power can be produced per liter of displacement. For example, if the displacement of an engine is 2 liters and the power is 100 kW, then the power per liter is 50 kW/liter.

As far as the engine is concerned, the higher the power per liter, the better. Around 2010, our country mandated that the power per liter of non-supercharged civil gasoline engines must reach 50 kW/liter, so we can see that there was a vote at that time. The liter power of minicars equipped with 1.0 naturally aspirated gasoline engines fluctuates around 51kW/L and 52KW/L.

But it's 1998!
The total power of the 760-liter inline six-cylinder gasoline engine on the Shanghai @海SH2.2A car is only 66 kilowatts, and the power per liter is only 30 kilowatts per liter!
The 4G63 engine that we want to import from Mitsubishi, in the eyes of countless Chinese people, is already an engine with an international advanced level in the 80s, but the power per liter is only 43.5 kilowatts per liter, and this one designed by Huateng Industrial Group series of engines, the liter power has reached an astonishing 45 kW/h...

How amazing is this fuel efficiency? !

Professor Sun Yaohua's voice trembled: "Little...Mr. Zhang, can we test it ourselves?"

"Of course no problem." Zhang Qihang naturally understood why Professor Sun and the others were so excited, and nodded with a smile: "Well... all the engine testing equipment in our group is provided by the Austrian Liszt Company. Teachers should be familiar with it. ?”

AVL Liszt Company is also the earliest engine tuning service provider and testing equipment supplier to enter the country. The engine testing equipment with international advanced level that you professors have the most contact with is the product of Liszt Company. The people who were still a little apprehensive immediately felt relieved, smiling and nodding...

"The test equipment of Lister Company, we are familiar with this."

"If it's a product of Lister, then there's no problem..."

"Liszt's test equipment is still very reliable in terms of accuracy..."

…………

No one disapproved of Lister's test equipment. At present, Lister's engine test equipment represents high precision and precision, and is the simplest test equipment in the world!

Since it is a test equipment that everyone is familiar with, everyone is not humble. The professors these days, especially the professors of science and engineering, have excellent hands-on ability. In addition, they are familiar with the equipment. Soon, the fuel consumption will be reduced. , noise, vibration, etc., the test results were fed back one after another, and looking at the data fed back, everyone's expressions became more and more strange...

Zhang Qihang is very clear about why everyone has such a reaction. The fuel consumption level, noise data, vibration data, emission data and other indicators of this... these four engines are too amazing. It is amazing that it is not like this era. The domestic engine!
To put it bluntly, in the eyes of Professor Sun, Professor He and others, the performance of these four large-displacement engines of Huateng Industrial Group has reached the advanced level of international civilian gasoline engines in the late 80s and 90s. It is an engine that a Chinese company can produce!
So much so that Professor He was so excited about the result, he quietly came to Zhang Qihang's side, and asked him in a low voice: "Xiao Zhang, is this engine really made by your group?"

Hearing Lao He's words, the other professors in the EFI research group around him paused for a while, and then whispered with the people around them as if they hadn't heard anything, but at the same time, they tried their best to eavesdrop. Watching the conversation between Lao He and Zhang Qihang—they also had the same question in their hearts. Was the engine with such advanced technology really made by Huateng Industrial Group itself?You really didn't fake it?Is it true that you brought back two engines that we don't know about from a special channel abroad, and then pretended to be products developed by you yourself?
It's just that Xu Qingwu would be offended to death if he said this, not to mention that he doubted a company that had made outstanding achievements in the industry and automobile fields without any basis. Keep your doubts in your heart... Leave it to Lao He.

Zhang Qihang hadn't spoken yet, but Professor Xu Qingwu was about to explode. He gritted his teeth and said in a low voice, "What do you mean by that?!"

Professor Xu Qingwu was very excited, but Zhang Qihang's reaction to Professor He was very understandable. He stopped Professor Xu Qingwu: "Teacher, don't get excited... In my opinion, it is normal for Professor He to have doubts in his heart. It is true that the technical level and finishing manufacturing capabilities of our company are much higher than those in China, and it is precisely because of this that Professor He feels unbelievable, right Professor He?"

"Yes," Professor He was magnanimous, and he didn't have any ghosts in his heart. Now that Zhang Qihang said this, he naturally nodded calmly: "Old Xu, don't get excited, what is the technical level of your engines?" , you should be clearer than me. Tell me, is the engine of this level of technology and content able to be produced by our domestic enterprises at this stage? I have some doubts in my heart, and I want to know more about it. ?"

"..."

Professor Xu Qingwu heard the words and stopped talking: Indeed, as Professor He said, I know better than anyone else the technical level and technical content of these engines. Ask yourself, if you change yourself to Lao He's In terms of position, I must have fewer questions in my heart than him. In this case, I really have nothing to be angry about.

After reassuring his teacher, Zhang Qihang turned his head and said to Professor He: "Mr. He, we can answer all your questions, so I will show you the high-precision processing of our finishing workshop later. CNC processing equipment and the level of our CNC masters, and then take you to see the processing process of our aero-engine and helicopter reducer, you will be able to understand the level of finishing of our group."

"Can you still produce aero engines and helicopter reducers?" Professor He was taken aback for a moment, then slapped his head with a look of great annoyance: "Look at my brain!"

He just remembered that Huateng Industrial Group not only has automobiles and motorcycles, but also unmanned helicopters and manned helicopters, and the engines used on the manned helicopters they produce, as well as the core final reducer, The sub-reducers are all produced by Huateng Industrial Group.

Compared with ordinary civilian gasoline engine parts, although the helicopter engine is also a piston engine, the manufacturing standard is a solid aviation-grade precision, which is several levels higher than the design and manufacturing precision of civilian gasoline engines. Since Teng Industrial Group is able to manufacture aviation-grade piston engines, as well as the main reducer and auxiliary reducer for helicopters, it obviously has the ability to manufacture the four engines in front of it.

Realizing this, Professor He blushed immediately, and apologized to Zhang Qihang and Xu Qingwu with a flushed face: "Xiao Zhang, I misunderstood you, since you can manufacture aviation-grade engines and precision equipment, you can manufacture such The engine is naturally fine, I just..."

Zhang Qihang couldn't let Professor He continue talking. He quickly interrupted her and said, "Mr. He, you are polite. It is normal for you to ask questions if you have any doubts in your mind. If you don't care about it, that's really bad... Based on your experience in adapting the EFI system, what percentage of fuel do you think can be saved if our engine is adapted to the EFI system? What percentage of power?"

When something embarrassing happens, the best way is to quickly avoid this embarrassing topic, and at the same time find a field that the other party is more familiar with and good at.

Sure enough, upon hearing Zhang Qihang's question, Professor He immediately laughed...

(End of this chapter)