Siheyuan: Heavy Industry Revitalizes the Country

"Brother Cao, look here.

There are only a few reasons why a diesel engine fails to start.

Here, here and here . . .

Then there is the problem of the valve not closing tightly, which is more of a workmanship and assembly problem.

As for the fuel injection pump and the fuel transfer pump, their problems are very similar, you can see here...

The problem of cylinder pulling is, to put it simply, a problem of precision.

It can be said to be difficult, and it is very difficult. You know the current situation of domestic technology.

Regarding atomization, it is also a question of process and precision. . . ”

I was just thinking about whether or not to push the engine forward quickly.

But after receiving the third-class merit, I thought about Professor Xu's evaluation of me.

In terms of engines, we are already the best in the country.

In that case, why bother dragging it out?

Especially the tractor.

It is an important tool for the country's people to have enough food.

The sooner the improvement is made, the sooner the farmers can use it.

Then the farmers can produce more food and suffer less hunger.

The country can also collect more food and sell more foreign exchange.

So, Fang wanted to answer the question based on the one raised by Cao Tianwei.

They were analyzed one by one and the problems were pointed out.

“Actually, in addition to the few issues mentioned by Senior Brother Cao just now.

I think the design of the cylinder gasket has some minor flaws.

It is easy to burn, and once burned, water leakage is inevitable.

Let's change it like this...

Then here, Brother Cao, do you think that the oil pump is too densely located?

Too dense, it is easy to be squeezed when working.

Once the extrusion time, frequency, and hot and cold exchange time are long, wear and tear are inevitable.

If the oil pump is worn, the oil pressure may be too low at the very least, or it may be damaged and leak oil.

Finally, the direct consequence of expanding the cylinder is a significant increase in horsepower.

Brother Cao, have you considered the clutch, gearbox, rear axle, gears, output shaft, half shaft and other parts?

Will the probability of wear and tear and failure also increase significantly? "

Before they knew it, all the members of the research team had gathered around.

Whatever Fang wanted to say, they would write down.

“I didn’t expect that Junior Brother Fang would make such rapid progress in less than a year.

This is a problem we had not discovered or thought of before.

Junior Brother Fang pointed out all of them, that's really great."

Cao Tianwei looked very excited, and there was no anger or unhappiness like in later generations when being criticized.

The other team members also nodded frequently.

“No, there are many places where I just have a flash of inspiration.

In addition, it was analyzed from a logical point of view.

Senior Brother Cao, this is really too much of a compliment."

Fang Xiang suddenly felt a little embarrassed and reached out to touch his nose.

"You're welcome! Being too polite is hypocritical!

By the way, the semester is almost over, and the professor said we should wait for the test results to come out.

We can recruit one or two outstanding students into our group.

By then, we will have more manpower and perhaps the progress will be faster.

If you think there is something good, tell me and we can bring it here in advance."

Cao Tianwei laughed and patted Fang Xiang on the shoulder.

"Okay, I'll pay more attention to it."

Fang Xiang didn't take it to heart and just nodded.

"Did you guys just write it down?

If you write it down, you will still be responsible for your own work according to the previous division of labor.

First, group all the problems together and then continue to analyze them.

Once the analysis and demonstration are complete, start drawing the diagram.”

Cao Tianwei immediately began to arrange the team members to start work.

Then he pulled Fang Xiang and motioned him to go out and talk.

“Thank goodness you helped check this time.

It is estimated that the new picture will be ready in half a month at most.

You can show it to me when the time comes, otherwise I won’t be able to let it go.”

Cao Tianwei lit a cigarette and looked at Fang Xiang happily.

"Brother Cao, we are one family, why are you talking about two different families?

We are all family, you can ask me anytime, I am always available. "

Senior Brother Cao has always been nice to me and takes good care of me.

Unless I am extremely busy, I basically don’t miss any time to attend classes.

On the other hand, there are not many times when I can provide substantial help like today.

“After testing the CA-10 upgrade project at FAW, the feedback was very good.

Basically, the optimization and upgrade of CA-10 has come to an end.

They also proposed specific indicators for follow-up.

Demand more horsepower, more torque, fewer failures and less fuel consumption.

But we don’t have much clue yet.

I drew a lot of drawings, but when it came to proofreading, none of them worked.

When you have any ideas later, remember to find me.

Also, when I went to see the professor in the morning.

Said you might be going into the aeronautics and astronautics department?"

Cao Tianwei mentioned the Jiefang truck, which was consistent with what Tongfang had expected.

They can't handle the upgraded CA-15.

After all, CA-15 is technology from the 80s.

It is only the mid-60s now, and a group of half-baked scientific researchers are asked to study a project that was not implemented until the 80s.

It is indeed a bit difficult for them.

However, even if CA-15 is not developed, the current CA-10C will be enough for FAW to use for many years.

However, the disadvantage is that the horsepower is not strong enough and the fuel consumption is a bit high.

It will be very difficult on plateaus and complex terrain.

Fuel consumption is still nearly 30 liters, which puts huge pressure on logistics and chemical industries.

“CA-10 has great limitations and has no potential to be tapped.

Unless the compression ratio of gasoline can be increased.

Developed a new type of efficient and fuel-saving carburetor.

Otherwise, there is basically no way out by simply solving the problem from the perspective of design and structure.

More fundamentally, the craftsmanship and precision need to be improved.”

Fang Xiang recalled that the subsequent CA-15 was due to the improvement of chemical technology.

The improvement of gasoline refining purity provides technical support for improving the compression ratio of the engine.

Before that, if you want to increase horsepower, there are naturally ways to do it.

The design is not difficult, just copy it.

But I’m afraid it’s impossible to make samples, let alone mass production.

Because the new engine will inevitably have higher requirements on processing accuracy, assembly technology and material quality.

However, as for the fuel-saving carburetor, you can give it a try.

This thing actually has no technical difficulty.

It's nothing more than a layer of window paper.

The only difficulty is that it requires a group of highly skilled workers with strong technical capabilities.

The accessories coming off the assembly line are subjected to secondary manual processing.

Just ensure its accuracy.

When working on the previous jeep project, Fang Xiang had casually drawn a carburetor.

Because the previous carburetor was too simple.

But if you want to redesign the carburetor.

It would be better if we both drew a new one together.

“I’ll go over to the aerospace department next week.

But Brother Cao, don't worry too much.

If you have any problems here, just call me.

I have an idea about the carburetor. Wait for me to draw a picture for you."

After thinking about it for a while, Fang thought that it wouldn't take much time.

The carburetor is a very precise industrial product that requires very high precision.

To put it simply, there are only a few things.

It only takes a moment to draw.

However, later adjustments are still inevitable.

Moreover, the carburetor itself is a device with very great limitations.

Various problems may also arise inside the engine due to oil quality, dust and accumulation over time.

Therefore, after the 21st century, it was completely replaced by electronic injection.

As for the malfunction and so on, Fang Xiang couldn't care less about it now.

We can't just ignore burning more oil just because this thing breaks down easily, right?

After all, fuel consumption is more worthy of attention than carburetor.

And even if you make a new carburetor, it only costs a few dollars.

Soon, two drawings of new fuel-saving carburetors appeared in Fang Xiang's hands.

“This one is from the CA-10, and this one is from the Jeep.

Brother, you can make a sample first to see how it works.

The precision requirements for this thing are not too outrageous, but the current machine tool assembly line.

It's still a bit difficult, maybe it needs some senior technical workers to manually polish and adjust it later.

Then there are data such as the air-fuel ratio and throttle opening and closing size, which probably need to be retested.

Finally, this one is probably a bit more delicate than the previous fuel saver.

Requires frequent maintenance and cleaning.”