After returning to the dormitory, He Yingxun couldn't resist the drowsiness that swept over after all, and told Zhou Jingming not to forget to wake him up at lunch, and then fell asleep.

After Zhou Jingming sat down, he put the design drawings he had just gotten on the table and looked at them seriously. Although the drawings are old, the technical parameters on them are readily available, and it can be seen that the older generation of automakers are still very rigorous in technology.

It is said that it is independent research and development, but in fact, China's two car brands, Hongqi and Shencheng brand cars, are modeled on foreign cars, and on the basis of foreign cars, "vivisection" is carried out, and then imitated.

The Shencheng brand sedan was modeled after the Mercedes-Benz 220S at that time, while the Hongqi sedan was modeled after the Cadillac at that time, so on these two cars, you can more or less see the shadow of Mercedes-Benz and Cadillac.

Of course, the real car imitation bigger and stronger, but also the later generations of Zotye, this is known as the "luxury car porter" of the car company, simply the use of the word "imitation" to the limit, only need to spend about one-tenth of the price, you can experience the feeling of driving a Porsche.

We don't make luxury cars, we're just movers of luxury cars.

Getting back to the point, comparing several important dimensions on the drawings with the dimensions he had calculated and measured before, Zhou Jingming found that there was no difference between these three dimensions, and some were only errors in accuracy.

In this way, Zhou Jingming was in trouble again.

"Could it be related to the clutch control mechanism or the compression spring?" Zhou Jingming put down the drawing and muttered quietly.

Up to now, what he checked was the main and driven parts of the clutch, and the other two major mechanisms, the pressing mechanism and the control mechanism, because the structure of the parts was complex, it was very troublesome to check, and Zhou Jingming had not done it yet.

There is no way, for the sake of today's plan, I can only continue to check the calculations.

Because the process was too complicated, until lunchtime, Zhou Jingming did not calculate the compression spring.

Lunch was eaten in the dormitory, He Yingxun took it from his sister, I have to say, He Yingqing's cooking skills are still very good, at least much better than the cafeteria, the two of them gobbled it up, they didn't care about any face, and even drank the vegetable soup.

After eating, He Yingxun packed up the dishes and chopsticks and sent them to He Yingqing's residence, while Zhou Jingming stayed in the dormitory and continued to check.

"No, this line of thinking must be wrong!" After a long time, Zhou Jingming put down the pen in his hand, shook his sour arm, and said with a frown.

If this continues, it will take him at least three days just to check the parts in the entire clutch!

How can this work!

Zhou Jingming rearranged his thoughts, although now he has enlarged the range to the entire clutch, but the choice of breaking point is still focused on each specific component, such a method cannot be said to be wrong, and it is not impossible to try it in this situation.

But when you think about it, this idea is not fundamentally different from staring at the friction plate before, it is still to break a whole and then disassemble each part.

Since it is too cumbersome to disassemble the parts, would there be unexpected gains if you tried to put these broken parts together and look at the problem from a holistic perspective?

Thinking about it this way, Zhou Jingming's train of thought was suddenly opened, why not regard the clutch as a black box? No matter how the parts inside work, only need to analyze the overall structure of the clutch, so that all the working effects of the "invisible" parts in the black box are all unified?

After all, the burning of the friction plate is not only related to a certain part, but the consequence of the overall work of the clutch!

"Why am I so stupid! I have done so much useless work!" Zhou Jingming patted his head, and then immediately took out the overall design drawings of the clutch and looked at it seriously again.

After adjusting his thinking, Zhou Jingming quickly found a breakthrough, and sure enough, there was a problem with the design and structure of the clutch!

Twin plate clutch!

If you are not mistaken, the frequent burning of the friction plates is caused by the structure of the double-plate clutch.

The so-called double-plate clutch refers to the fact that the clutch has two pieces of the driven disc. Although the friction surface is doubled due to the increase in the number of driven discs, the clutch's ability to transmit torque is also increased, the engagement is smoother and softer, and the pedal force required to press the clutch is also reduced.

However, it is precisely because of the structure of the double-plate driven disc that the ventilation and heat dissipation of the middle pressure plate of the clutch will deteriorate sharply, and the heat generated inside the clutch cannot be discharged, which will naturally cause the friction plate to overheat, accelerate its wear, and cause the friction plate to burn out for a long time.

Not only that, the double-plate clutch will also make the pedal disengagement stroke larger, and it is not easy to separate completely, which will also aggravate the wear of the friction plate when coasting in neutral gear.

Under the action of these two factors, the friction plate burns out, which is naturally faster.

"I see, it turned out to be caused by the unreasonable structure of the clutch. Zhou Jingming seemed to have discovered a new continent, picked up the drawings on the table and rushed out.

At this time, Zhao Ke, who was resting on his stomach in the office, was suddenly awakened by the sudden sound of pushing the door, and when he looked up, it was actually Zhou Jingming.

"Xiao Zhou, in a hurry, is there something wrong?"

Zhou Jingming put his hands on his waist, ignoring the sweat on his head, "Senior brother, I have found the root cause of the burning of the friction plate!"

"What are you talking about, so fast?" Zhao Ke suddenly fell asleep, immediately stood up, and then poured a glass of water and handed it to Zhou Jingming, "Drink saliva and speak slowly." ”

Zhou Jingming took a sip of water, then spread out the drawings and laid them flat on the table, "I originally wanted to check whether there was a problem with the design of the compression spring in the morning, but because it was too complicated, I couldn't count half of it, but after adjusting my thinking, I found that there was a problem with the previous entry point." ”

Zhao Ke didn't speak, he was waiting for Zhou Jingming to explain further.

Zhou Jingming breathed a sigh of relief, and then pointed to the drawing, "Senior brother, you see, the car we produce uses a double-plate clutch, and the problem is precisely in this double-plate clutch!"

"Double-plate clutch?" Zhao Ke's eyes lit up, "You mean, it's because of the structure of the double-plate clutch, which causes the internal heat dissipation conditions to deteriorate, so the friction plate burns out?"

Zhao Ke also graduated from Runzhou Institute of Technology, and Zhou Jingming made such a little fuss, and he instantly understood the reason.

"Yes, it's the design of the clutch. ”

"Then are you going to modify the design of the clutch next?" It was very strange, after knowing this reason, Zhao Ke's face did not show joy, but was full of sadness.

"Of course. ”

"This matter is not as simple as you say, the assembly design can not be modified, it is a principle of our factory, and, just based on what you said, it is difficult to make others believe that there is really a problem with the design of the clutch. ”

Zhao Ke sighed and said helplessly.