The 256th chapter is not to put satellites, but to build rockets
If you want to squeeze power, you must have an advanced turbocharger, and Qin Zhenhua is already very good at this.
After all, with his last experience in Germany, Qin Zhenhua already knows the design code of the other party's turbocharger. Even if he has not memorized all of it, at least the process is clear. Now he can use the imported
A CNC machine tool was used to make the same turbocharger.
Although the structure of our own engine is different from that of the other party, we can still learn from it in these aspects. The specific shape of the turbocharger impeller was obtained after repeated research.
"We already have a certain degree of mastery of turbocharger technology, and we believe we can make it." Qin Zhenhua said: "Moreover, this advanced turbocharger has the ability to further tap its potential.
This allows our engine to eventually reach the power requirement of 1,500 horsepower."
The turbocharger is responsible for blowing in more air. On the other hand, it is responsible for injecting more fuel and better atomization effect, so that the fuel can be fully burned, thereby generating greater power.
Wang Erzhu changed to another slide. When this slide was released, many people frowned.
"What is this?" Zhang Baolin, as a well-known engine expert, has not revealed what this thing is. The name on it describes the fuel system. However, Zhang Baolin is not familiar with this thing at all. It can be said that, listen,
Never heard of it.
High pressure common rail injection system.
"If we want to achieve greater power, we need higher fuel injection pressure. All the engine experts present know this. However, it is not easy to do this with our existing fuel system."
Qin Zhenhua began to explain to everyone.
A traditional diesel engine drives a fuel pump through the engine. This fuel pump is a delicate cam or plunger to squeeze the fuel. A device supplies an injector. Therefore, if it is a V12 structure, the fuel pump
, there must be 12 oil roads, each going its own way.
In the work of a diesel engine, due to high-speed operation, each diesel injection process of each cylinder only lasts a few thousandths of a second. Therefore, whether it is the oil pump, oil pipe, or injector, the pressure inside changes with time and
Varies with different locations.
Due to the compressibility of diesel and the pressure fluctuation of diesel in the high-pressure oil pipe, the actual fuel injection state is quite different from the plunger fuel supply rule specified by the fuel injection pump.
If the fuel is not delivered at the highest pressure, then the amount of fuel injected by the injector is not the highest. Moreover, this is not the worst. The most annoying situation is that the pressure fluctuation in the fuel pipe may
After the main injection, the pressure in the high-pressure fuel pipe rises again, reaching the pressure at which the needle valve of the fuel injector opens. In this way, the closed fuel injector re-injects fuel. This is the phenomenon of secondary fuel injection. At this time, the engine is
It is unnecessary and cannot be completely burned at all.
The resulting problem of excessive exhaust emissions is certainly not something that tank designers should consider, but it is obviously counterproductive to improving the power of the engine, and because the residual pressure in the high-pressure oil pipe will change after each injection cycle
, causing unstable injection, which is more likely to occur especially in the low speed range, thus leading to unstable diesel engine operation.
If it is just the current engine, it can be tolerated, but if the fuel injection pump pressure is simply increased, this problem will become more and more serious.
Therefore, if you want to solve it, you have to use new technical means, which is high-voltage common rail!
"This common rail means that all injectors use the same pipeline. The oil pressure in this pipeline is stable and is generated by a special high-pressure oil pump. In this way, the pressure in our high-pressure oil pipes and
The speed of the engine has nothing to do, which greatly reduces the shortcomings of traditional diesel engines. Well, to be precise, we will increase the fuel pressure to about three times the existing fuel pressure, so that more fuel can be injected and completely squeeze our engine
potential.”
When Qin Zhenhua explained to this point, the professionals could already understand it, and Zhang Baolin started to ask questions again: "So, how to control the fuel injection at the fuel injector?"
It was originally mechanical and controlled by machinery. Now, if you do this, the oil pressure there will never change, and all the existing technologies will no longer work.
"An electronic system, to be precise, a small computer, is used to control the amount of fuel injected by the injector and the injection time, so as to achieve the optimal effect."
"You are indeed launching satellites." When he heard this, Zhang Baolin already agreed with Niu Shilong's words. Niu Shilong was an outsider, but he was still accurate in judging people. This kid didn't care about his own industrial base or even the development of science and technology.
Level, you can brag as much as you want.
Nowadays, many domestic scientific and technical personnel do not have access to computers. If a tank engine needs a computer to automatically control fuel injection, it is absolutely a dream.
Not to mention China, even in the West, we still don’t know if there is such a system.
According to Qin Zhenhua, the performance of this system is good, but if it is developed by his own side, it is definitely a ****, exaggerated style, with an output of tens of thousands of kilograms per mu, you know
What is our current technical level?
For a time, many people in the conference room started talking. Everyone's opinions were almost the same as Zhang Baolin's. They would never believe it if they said that this kind of system could be used. It was so lofty.
What's more, the few people who know Qin Zhenhua's origins lament that he made the same mistake as his father, being so ambitious and overachieving without considering his own actual level.
"Yes, from the current point of view, our fuel injection system is a bit ahead of its time. However, it is absolutely impossible to achieve an advanced tank power system without surpassing it. We must achieve it in its current form.
The power level of 1,200 horsepower, or even the power level of 1,500 horsepower, is more advanced than the German tank diesel engine. Without such technology, can we achieve the indicators we want? This is not to launch satellites, this is..."
Qin Zhenhua paused and said: "This is building a Long March rocket. Only with rockets can we actually launch satellites!"
To reach the world's advanced level, do you still want to follow the conventional route? Without advanced concepts, how can we have advanced products? Now, you don't even dare to think about it?