1959: Carrying the achievement system, she rolled

On Du Yimeng's first day at work, she went straight to the second laboratory. Since she was discharged from the hospital, Qin Chulong had never visited her, but Wen Yan had visited her several times.

Based on her understanding of him, he must have been held back by something more important.

When Wen Yan came over a few days ago, she said that Qin Chulong had not returned home to live for several days and had been living in the laboratory.

Wen Yan did not force him to go back. They were both engaged in research and she had encountered this situation before.

If I don't solve the problem, I won't be able to fall asleep even if I lie in bed. Instead of going back home with my eyes wide open, I might as well stay in the laboratory.

When Du Yimeng saw Qin Chulong's appearance, he was very surprised. He had unkempt hair, unshaven beard, and sunken eyes.

When he turned his head to look at her, she found that his eyes were very bright, and surprisingly bright.

"Student Du, come here." Qin Chulong looked up and saw that the person coming was Du Yimeng. He shouted, then lowered his head and continued to fiddle with the things in his hands.

The tone and expression made it seem as if Du Yimeng had just left the laboratory. Perhaps he had forgotten that she had not appeared in the institute for a month, or perhaps he had already forgotten the time.

"If we divide all the cylinders into two groups and arrange them at an angle to form a V-shaped structure, can we reduce the space and also the length and height of the engine?" Qin Chulong asked as he randomly divided several old cylinders into two groups.

"Maybe it can also improve the balance of the engine." Qin Chulong said again.

Du Yimeng's eyes lit up as she looked at the cylinders arranged in a V-shape.

They had only thought about reducing unnecessary burdens to reduce the size of the engine, so why didn’t they think of changing the structure of the engine?

He asked this question because he might not want to use the engine they had developed before. The reason must be that there were problems with the previous engine, and perhaps they were going in the wrong direction from the beginning.

"If this V-shaped arrangement of cylinders is combined with a four-stroke working cycle, it may be possible to achieve efficient power output and optimize space utilization," said Du Yimeng.

Previously, in order to reduce the size of the engine, they designed the engine structure to be relatively simple.

There is no complicated valve mechanism, while the four-stroke engine has not only the cylinder head and cylinder head cover, but also the complex structure of the valve mechanism.

The engine they previously studied was a two-stroke engine, in which the crank completes one working cycle.

The four-stroke cycle is twice as long as the two-stroke cycle, which means the crank needs to rotate twice to complete one working cycle.

You should know that at the same crankshaft speed, the power of the two-stroke is theoretically higher than that of the four-stroke, but in reality the output power is slightly lower.

In addition, the two-stroke torque is more uniform, and the lubrication method uses mixed lubrication and separation lubrication, while the four-stroke uses splash lubrication and pressure lubrication.

In this comparison, the four-stroke lubrication method appears to be more practical.

The difference in lubrication methods directly affects the working environment of components. After comparison, the performance gap between the two is clear at a glance.

It’s not that two-stroke engines don’t have their own advantages, but there are significant differences in many aspects that affect their applicability and efficiency.

Especially in terms of fuel consumption and emission efficiency, the two-stroke fuel consumption is high and the emissions are not very sufficient.

The four-stroke engine has lower fuel consumption and more complete emissions.

"I just don't know what the heat dissipation performance is like?" Qin Chulong frowned when he thought of this. He was almost psychologically traumatized by the engine.

Logically speaking, the engine they designed previously was small in size, light in weight, and had high output power, which perfectly met their requirements.

As a result, after he tested it hundreds of times, the engine broke down.

He didn't want to work on the engine, but he couldn't get involved in other laboratory work, and he was a restless person.

He could only tinker with the engine, and it didn't matter, he actually found the problem.

After hundreds of tests, he found that it had high fuel consumption, low thermal efficiency, and was prone to overheating.

In particular, the cylinder piston is prone to deformation, and so many faults have occurred before it has even been installed on the new tank. It is obvious that this engine is not suitable.

Like a scumbag, he abandoned the engine they had been working on for months without hesitation.

In his opinion, anything that fails to meet his requirements is just a pile of scrap metal.

He wanted to design a new engine with better heat dissipation performance.

"I don't know." Du Yimeng told the truth. It was just a guess now. How could she know whether the heat dissipation performance was good or not?

Soon she realized that Qin Chulong was not asking her, but asking himself.

"I think it should be better." Qin Chulong murmured.

The teacher and student discussed for two hours. Du Yimeng also learned from Qin Zhulong why he discussed this with her. It turned out that there was indeed a problem with the engine they designed before, and she had guessed it right.

Of course, that's not what he actually said. He said the engine they had developed before was rubbish.

However, she felt relieved when she remembered that when they were in college, he had directly criticized the machine tool he had developed himself in class as rubbish.

Even a rubbish engine has its advantages, it's just that it's not suitable for use on new tanks.

"Next, we will redesign an engine with better performance according to what we just said." Qin Chulong said righteously.

Du Yimeng's face was confused for a moment. Who did "we" include?

Including her?

"Have you written everything down?... I remember now, Wan Ping went to make ammunition." Qin Chulong raised his head and looked around, then he remembered that the student was not here.

"Do you still remember what I just said?" When he saw Du Yimeng, his eyes lit up. Even if one student ran away, there was still one left!

Du Yimeng nodded, and suddenly she had a bad feeling. She was very familiar with this look, which was always given to Wan Ping when he asked him to do something.

"Teacher, I am the chief designer now." Du Yimeng said quickly. Her fire control system was still waiting for her!

"Chief designer? Okay, then the engine drawings will be handed over to you. Draw the drawings first and give me part of them." Qin Chulong said, and nodded at the same time. No need to waste brain cells, very good!

Du Yimeng: ...

But looking at Qin Chulong's sloppy appearance, she couldn't say no. She didn't know how long the teacher had been in the laboratory, but she felt that it must have been quite a while.

He must have put in a lot of effort to turn the engine they previously thought was perfect into garbage after testing it.

And she is the chief designer, so drawing the blueprints is her job.