Chapter 30 Let it go, I support you

The 212 Jeep is a hard-bridged, hard-horse, load-bearing four-wheel drive off-road vehicle developed based on the technology of the automobile industry in the 40s of this century, in more familiar terms, it is a hard-core off-road vehicle.

However, limited to the limitations of the times and technology, the 212 Jeep provides good off-road performance and reliability at the same time, it is inevitable to make a relatively large trade-off in other aspects, and there is no way to achieve a relative balance between the various orientations, and the comfort is the most discarded among all the elements that have been discarded, and even strictly speaking, comfort is not in the scope of the designer's consideration at the beginning of the design.

How poor the comfort of the 212 jeep is, no one who has ever sat on it may not imagine that someone is sitting on a 212 jeep running wildly on an unpaved road and is thrown upside down.

As for the poor sealing, all the people who have sat in the early model of the 212 jeep in the big winter are "deeply touched", such as the 3 front-speed 212 jeep produced in 1979 that Chen Geng borrowed from the military region...... Rushing into the cab from all the places you think of and the unthinkable, it's so sour that you don't want it.

Seeing this, you should know that there is no heater in this car, yes, there is no heater, and of course the air conditioning is not to be considered, but this is not the most outrageous, not even the seat belt......

Of course, Liu Qianjin didn't expect so much, but his mind was also very simple: if Chen Geng really had a way to make the 212 jeep less bumpy, let alone compare it with a car, even if it was the same as Huang Dafa's van, it would be a rolling source of wealth.

"Yes," Chen Geng nodded and said: "Actually, it's quite simple, in my junior year, our department had a research topic, that is, how to improve the comfort of the 212 Jeep, at that time, we took a 212 Jeep under the leadership of the teacher to do practice, but the comfort after the upgrade has indeed improved a lot, although there is still some gap from Santana, but it is not worse than Shang&Hai and Volga cars." ”

Although it sounded amazing, Liu Qianjin immediately believed it, and there was no doubt at all: it was the Department of Automotive Engineering of Huaqing University!

Thinking that Huaqing University had already done such a research project, Liu Qianjin kept rubbing his hands excitedly: There is really a pie that has fallen on Lao Tzu's head!

"And how do you do that?" Liu Qianjin couldn't help but ask.

"Simply speaking, it is the adjustment of the chassis and suspension structure of the 212 Jeep and the replacement of new tires," Chen Geng explained: "You also know that the 212 Jeep uses the suspension design of leaf springs and hydraulic shock absorbers, plus the tires are very hard, the two factors add up, and the comfort of the guide zhì car is very poor, we originally designed this set of schemes, on the basis of basically not changing the existing chassis structure of the 212 Jeep and using the existing front and rear hard axles, a set of 4-link suspension was designed, The elastic elements have been replaced from the original leaf springs and hydraulic shock absorbers to coil springs and hydraulic shock absorbers, and the tires are car tires on the Santana, after such improvements, although there is still a gap between the comfort of the 212 and the sedan, it is not big. ”

Liu Qianqian nodded again and again, his eyes lit up, of course he had a deep understanding of the bumps of the 212 jeep, and he also knew that if Chen Geng could really upgrade and improve the suspension and tires on the basis of the existing car, and finally make such a comfort-oriented 212 jeep, Lin Zheng's tertiary production office would indeed have a great chance to make money.

So now, Liu Qianjian's only worry is: "Where did you get the coil springs, hydraulic shock cylinders, and tires?" Can we find qualified accessories that meet the requirements in China? ”

Liu Qianqian's worries are reasonable, the domestic automobile industry is very weak, coupled with the pressure of economic development, so that the country's attention to trucks is much greater than the importance of passenger cars, although our truck technology is not advanced but it is okay, but the passenger car industry is too weak, weak to what Cheng dù, at this stage our country's two major national car brands: Shanghai & Hai and Hongqi, are still using non-load-bearing body structure, that is, there is a chassis with girders like a hard off-road vehicle, The suspension system is the simplest leaf spring and hydraulic shock absorber.

Internationally, the car has already eliminated the non-load-bearing body structure, and turned to a lighter, lower-cost load-bearing body, as for the suspension structure, the international high-end cars generally use front and rear independent suspension, and the mid-range models are also more than 100 million before the independent rear semi-independent suspension.

Someone said, millennium, you said that it's not right, you said earlier that the suspension structure of the Jeep 212 is also a leaf spring and a hydraulic shock absorber, why can the Jeep 212 turn people upside down, but why did I hear that the big red flag CA770 is notoriously comfortable, is there something wrong with this?

This is actually explainable, and the reason is simple, because the Dahongqi CA770 is heavy enough!

The non-load-bearing body has a pair of very heavy body girders, which itself is much heavier than the load-bearing body with only a thin layer of iron sheets, and Dahongqi also has to take into account the development of bulletproof cars, the chassis and body must be equipped with bulletproof armor and bulletproof glass, and the structural strength should be considered at the beginning of the design, so both the bulletproof version of CA772 and the non-bulletproof version of CA770 are very heavy. The non-bulletproof version of the CA770 weighs more than 2.5 tons, while the bulletproof version of the CA772 weighs up to 4.93 tons!

And leaf spring suspension has a very significant feature is that in the case of light load, it will be very bumpy, but in the case of a certain load, it will be more comfortable, we have sat in a van or pickup, and we also know that in order to improve the load capacity, the rear wheel suspension of the van and pickup truck is made of leaf springs as elastic elements, in the case of no load, the rear axle of the van and pickup is very bumpy, but when the car is loaded with a load of three or four hundred pounds, you will be surprised to find that but in terms of the rear axle suspension system, At this time, the comfort and toughness of the rear suspension system are good, and it can be compared to some very good tuned semi-independent suspension!

In addition, there is a reason for tires, 212 Jeep needs to take into account off-road, take into account the cost, take into account the durability, our country's tire technology is not advanced enough, in the case of not being able to take into account the cost, off-road performance and comfort, we have to give up comfort to choose the cost and off-road performance, so the tires of 212 are very hard, but very wear-resistant, many of a 212 do not change the tires once in seven or eight years This is not an uncommon thing, but the tires used by Dahongqi are imported car tires, which are relatively soft, The tires filter the bumps more sufficiently, and there is another bonus to comfort.

The last reason is the condition of the road surface, where does the 212 jeep often run? Dirt roads, mountain roads, it is good to be able to walk on the paved roads that are not very good, but what about the big red flag, to put it mildly, when did the big red flag go out of the capital? In that place in the capital, where the big red flag goes, is there a place where the road is not paved?

Have it?

There are a lot of digressions, we continue to talk about the domestic automobile industry, because there has been little demand, although our country has the industrial capacity and potential to produce a complete shock absorber for automobiles with "coil springs + hydraulic shock absorbers", but in fact it has not produced a coil spring as an elastic element for automotive shock absorbers; At the same time, it does not have the capacity to produce comfort-oriented tires for passenger cars.

We do have this ability and potential, but because of the direction of industrial development, we can't produce it yet.

But in this way, the problem comes: Chen Geng's idea is based on comfort-oriented tires and shock absorbers of "coil spring + hydraulic shock absorber", but there is no way to provide such products in China, what should I do?

Sourcing from a foreign country? Come on! Purchasing from foreign countries costs foreign exchange, and this option is no longer on Liu's agenda.

Chen Geng said with a smile: "I am lucky, I helped Wolfsburg solve a few small problems when I was in Poussin before, and I took the opportunity to cooperate with Mr. Kindler this time, I mentioned this matter to him, and Mr. Kindler is willing to help us with this."

With the help of Mr. Kindler, the headquarters in Wolfsburg, Germany, promised to provide us with a certain number of shock absorbers and tires used on the Santana every year, which is 1,000 sets per year, and we can settle with them in RMB.

In addition, the diameter and size of the 212 Jeep's wheel hub are different from Santana's, and we also need to customize a batch of flanges for transfer...... The first batch of shock absorbers and tires from the Mordo Poussin company should have arrived in the next two days......"

Don't look at Chen Geng's simplicity, but Liu Qianjin was dizzy and fascinated by it!

Although he didn't know what Chen Geng had helped the Germans, he knew that foreigners were all very angry, and it was impossible to think about that favor if foreigners were willing to provide such great help to Chen Geng, right? If it is converted into money, why can't it be thousands of dollars? But Comrade Xiao Chen's ideological consciousness is high, and this is simply not asking for money, which has given the Third Ordnance Repair Factory such an opportunity for development!

Holding Chen Geng's hand tightly, Liu Qianqian's eyes were red with emotion: "Comrade Chen Geng, on behalf of the more than 600 old and young masters in our factory, thank you!" Don't dare what you want to do, you can do it boldly in the future, don't have any worries, don't have any pressure, I'll support you in the back......"

Liu Qianqian, who always shows people with a stern appearance on weekdays, is already a little speechless with excitement at the moment.

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PS: I wrote some technical things, I don't know if you like it or not, if you like it, I'll write more, if you don't like it, I'll write less, and please tell me in the book review area, do you like these technical things?

In addition, today 28, tomorrow's New Year, the day after tomorrow, the first day of the new year, the new year, the millennium not only wants to take this opportunity to accompany the family more, some entertainment is not easy to shirk, so the new books and old books are a daily update, and please understand, the millennium is here to thank you.