Reborn in 1982: I Became the Richest Man by Repairing Cars

Chapter 139 The All-New Generation BJ212: A Qualitative Leap

"It lacks complex damping adjustment functions, offering only fixed damping and unable to be flexibly adjusted according to road conditions."

"Furthermore, the damping effect of the shock absorber is relatively weak, making it difficult to effectively suppress the rebound of the leaf spring."

"This is also one of the important reasons why you just mentioned 'bumpy chassis and poor comfort'."

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"After all, leaf springs are inherently stiff, and the damper's damping is insufficient."

"Road vibrations are directly transmitted to the car body, making the ride extremely bumpy."

Jiang Hui looked at Liang Hongyu and said further.

"But Master Jiang, leaf springs and damping shock absorbers are a classic combination for hardcore off-road vehicles."

"It is also the most recognized solution for military off-road vehicles."

Liang Hongyu couldn't help but retort, but then he immediately thought of something, "Of course, American M151A2."

That product tried some new approaches.

"I heard some time ago that you specially modified an M151."

"But our BJ212 certainly cannot change this basic structure."

Jiang Hui certainly wouldn't refute the question Liang Hongyu raised.

"You're right, this combination is fine and doesn't need to be changed now."

"However, the damping can still be adjusted appropriately to ensure it best suits the needs of our BJ212."

"But we don't have damping testing equipment, so how can we ensure that the damping of the shock absorber meets the requirements?"

Liang Hongyu immediately asked another question.

"That's simple, you can test it manually."

Jiang Hui demonstrated by pressing down on the car body. "If you press down on the car body and then release it, and the car body bounces back 1-2 times before stopping, it means the damping is appropriate."

"If there are too many rebounds, it means the damping is too small."

"If you can't press it down, it means the damping is too high."

"We rely on experience and repeated adjustments. Although it's not as precise as professional equipment, it's sufficient for the current conditions."

Liang Hongyu nodded repeatedly as he listened, the worry on his face vanishing completely.

"I can't believe there's such a simple debugging method! That's amazing!"

Jiang Hui was already immune to this level of praise.

In his own auto repair shop, how often do his apprentices not offer him a little "sweetness"?

"One more detail to pay attention to is the tire pressure."

"Did you inflate the tires too much during your testing?"

"High air pressure reduces grip and amplifies the feeling of bumps."

"Yes, we inflated the tires to 2.5 bar to reduce tire wear."

"That's what a technician next to me said."

"It's too high, just adjust it to 2.0 bar."

Jiang Hui offered his advice directly: "Lowering the tire pressure slightly increases the contact area between the tire and the ground, resulting in better grip and filtering out some bumps, which significantly improves comfort."

"I will immediately arrange for the engineers to adjust according to your plan. We'll get started today and try to see the test results tomorrow."

Liang Hongyu had great confidence in Jiang Hui's abilities and immediately instructed the technicians around him to get to work.

"Director Liang, chassis tuning is not something that can be done overnight. After the first adjustment, we need to do several more tests."

"We need to test different road conditions, such as gravel roads, dirt roads, and asphalt roads. We need to drive at both high speeds and low speeds, and then make minor adjustments as we find problems."

"But the direction is exactly what I've been talking about."

Chassis tuning is a mysterious and unpredictable issue.

Even in later generations, there are still many aspects of the chassis tuning of various international automotive giants that cannot be standardized.

Some judgments are even made based on the engineer's subjective judgment.

For example, in tire comfort testing, various car manufacturers have some parameters that are scored entirely based on human perception.

"I understand. I will personally oversee the testing. If there are any problems, I will contact you again."

"If you finish the application process by phone today, give me a call and I'll ask Director Liu to help you skip the line."

Liang Hongyu was in a good mood and didn't forget to remind Jiang Hui about installing a telephone.

Otherwise, you often can't find the people you need to look for.

Jiang Hui naturally had no objection to this.

After returning and confirming that Fan Weimin had completed the formalities, he immediately called Liang Hongyu back from the convenience store at the entrance of the alley.

As a result, the telephone company representatives came to our door the following afternoon.

The service attitude of these workers was generally not good.

After all, they are all secure jobs.

However, they knew the phone number of Jiang Hui's store, applied yesterday, and can have it installed today.

Naturally, he was very clear about what it meant.

So, during the phone installation process, his attitude was unusually much better than usual.

In the following period, the chassis tuning of the BJ212 by BAIC also made rapid progress.

Although the comfort level of the car was well-tuned, it was still far behind that of later cars.

However, compared to the BJ212 currently in mass production, this is already a huge breakthrough.

BAIC is very satisfied.

Meanwhile, the engine modification in the North China region is nearing completion.

The all-new BJ212 has officially begun vehicle testing.

BAIC's test site was temporarily divided into three areas: off-road, highway, and bumpy road.

Several BJ212 replacement prototypes, painted with military green primer, were neatly arranged.

Liu Chenggang, the plant manager of BAIC, Yang Aiguo, the chief engineer of BAIC and the military representative stationed at the plant, and others personally participated in the testing and experience on site.

"Master Jiang, you've finally arrived!"

Jiang Hui certainly couldn't be absent from such an important occasion.

Liang Hongyu spotted Jiang Hui at a glance and quickly waved him over, "Come here quickly, we'll need your help as our consultant if there are any adjustments needed later."

Jiang Hui quickly stepped forward and greeted them politely: "Director Liu, Chief Engineer Sun, Representative Yang, hello."

Although Jiang Hui knew all these people, and they also knew Jiang Hui.

However, during this period, Jiang Hui had the most contact with Liang Hongyu.

"Hongyu told me that the engine and chassis tuning of our BJ212 were all thanks to your advice and suggestions. You're truly a promising young man!"

"Without you, our upgrade project would probably still be stuck in the same place."

Liu Chenggang was very polite.

In fact, people at this level are usually very polite, unless they are dealing with their direct subordinates.

Sun Feng also came over and said, "I have studied the chassis tuning plan carefully. It is simple, practical and perfectly suited to our current production conditions at BAIC."

"In particular, the method of manually testing damping solved our major problem of not having professional equipment."

Yang Aiguo remained serious, nodded to Jiang Hui, and said nothing more.

His nephew Yang Weidong's M151 was modified by Jiang Hui.

Even the rapid advancement of the BJ212's replacement was the result of his pressure behind the scenes.

Therefore, he was naturally very clear about Jiang Hui's abilities.

"Distinguished leaders, this upgrade and optimization has focused on resolving three core issues."

"Firstly, the engine. Under Master Jiang's guidance, Beinei made minor optimizations to the 492Q engine."

"The compression ratio has been increased, the intake manifold and carburetor have been optimized, power has increased by 12%, and fuel consumption has been reduced by 10%, fully meeting the power requirements of the military and the fuel-saving needs of the civilian market."

"Secondly, the transmission. The 4MT transmission from Beichi has been properly tuned, and the shifting feel and reliability have been improved. It has solved the previous problem of shifting stiffness, and its performance is significantly better than that of the 3MT."

"Thirdly, the chassis has been optimized, with the addition of a stabilizer bar and improvements to the damping of the shock absorbers."

"The bumpiness has been significantly reduced, and high-speed stability and cornering roll have also been improved."

"It also retains the load-bearing capacity of the leaf spring suspension, without affecting off-road capability."

Liang Hongyu quickly explained the main changes, and then had several factory leaders get into the car to begin test drives.

"Talk is cheap; I'll drive it myself and see how it actually works."

"First, we'll go to the off-road section, then the highway, and finally test the bumpy road."

"Minister Liang, please come with me."

Yang Aiguo is most concerned about the performance changes of this generation of BJ212.

After all, most of the BJ212s were distributed to various teams for use.

Having been called out, Liang Hongyu quickly agreed and got into the passenger seat.

Jiang Hui then invited Liu Chenggang to experience the test vehicle's performance together.

In fact, most of the previous experiments have already been completed.

Today, the main purpose is for the leaders to inspect the effectiveness of the upgrade.

If everyone agrees that there are no problems, then large-scale mass production can be arranged.

The older BJ212 model will also be discontinued at that time.

This matter has a significant impact, so the factory leaders had to come and confirm it in person.

If it's done well, it's everyone's credit.

If things go wrong, everyone will be held responsible.

"Master Jiang, we really owe you a lot this time."

Liu Chenggang followed Jiang Hui into a test vehicle. "The higher-ups attach great importance to the replacement of the BJ212 and require us to meet the military's needs while also taking into account the future civilian market."

"If we fail the inspection, we at BAIC will be under a lot of pressure."

"We've consulted many technicians before, but none of them could solve the chassis and engine problems."

"Your appearance helped us out of our predicament."

Liu Chenggang's words were not just polite talk.

Without Jiang Hui, BAIC would have had to wait at least three more years to launch the new BJ212.

It will probably take five or six years to reach the current level.

Jiang Hui started the vehicle while smiling, his tone humble.

Now is definitely not the time to be arrogant.

"Director Liu, you flatter me. I'm just quite familiar with the structure of the BJ212."

"Plus, I usually like to study things diligently, and I was just lucky."

"Besides, my dad is a mechanic at BAIC's repair shop, so I'm practically a BAIC family member."

While the two were talking, Jiang Hui had already driven the test vehicle toward the high-speed test area.

The test vehicle drove smoothly on the dirt road without any obvious bumps or bounces.

When driving over bumpy roads, the vehicle's posture is relatively stable, unlike the violent shaking that occurred with previous mass-produced vehicles.

Sitting in the passenger seat, Liu Chenggang could clearly feel the difference.

"After the redesign, the BJ212 has pretty good off-road performance, with better passability and stability than the previous mass-produced models."

"The shock absorption effect has indeed improved significantly, and fatigue should be reduced considerably during long drives."

"Director Liu, your intuition is correct."

"Our average speed on off-road sections was 35 km/h, and the maximum bumps in the vehicle were reduced by about 30% compared to before."

"The shock absorbers made no abnormal noises. When driving at 80km/h on the highway, the steering wheel did not feel unstable, the steering was precise, and the car body did not vibrate significantly."

"During the bumpy road test, the number of times the vehicle bounced back was controlled within 2, which meets our previously set improvement goals."

Jiang Hui led Liu Chenggang through all the test sections before returning to their starting point.

Yang Aiguo and Liang Hongyu have also completed the test.

Have you conducted any long-term testing?

"For example, how reliable is it after driving 10000 kilometers continuously under harsh road conditions?"

"Will the engine and transmission malfunction?"

Clearly, Yang Aiguo's experience was quite good.

The only uncertainty is whether the performance will be stable after long-term testing.

"Representative Yang, we have arranged for long-term testing. The prototype vehicle has already driven 8000 kilometers without any malfunctions."

"The engine power is stable, the transmission shifts smoothly, and there is no looseness in the chassis."

"We will give you the test report as soon as we complete the 1000-kilometer test."

Upon hearing Liang Hongyu's words, Yang Aiguo subconsciously nodded, his gaze returning to the prototype vehicle.

"One more thing, regarding engine fuel consumption, your test showed a 10% reduction."

"In real-world use, road conditions are more complex. Can you guarantee that fuel consumption will actually decrease?"

"This is very important for the logistics and supply of the troops."

Although military vehicles are all gas guzzlers, fuel efficiency is not the primary consideration.

However, since the new generation BJ212 has set such a goal, Yang Aiguo certainly hopes that these figures are accurate.

"Representative Yang, you can rest assured about that."

The North side arranged for Chief Engineer Tao to lead a team to participate in today's test.

The key to fuel consumption lies in engine improvements.

So he stepped forward to answer Yang Aiguo's question.

"When we optimized the carburetor, we adopted a solution of matching the metering orifice and optimizing the idle speed oil passage."

"Each carburetor is individually tuned to ensure accurate air-fuel ratio, resulting in a real reduction in fuel consumption."

"We conducted fuel consumption tests under different road conditions, and even on off-road sections, fuel consumption was reduced by more than 8%."

Yang Aiguo glanced at Cheng Tao, and his tone finally softened.

This situation is better than I expected.

Although he had previously stated at the meeting that BAIC must launch a new generation of BJ212 this year.

Otherwise, he would have to report it to his superiors.

In reality, his bottom line is that he would be doing very well if he could get it done next year.

Having served as a military representative at BAIC for so many years, he has a certain understanding of the difficulty of upgrading and replacing a car.

Unexpectedly, with the addition of Jiang Hui as an advisor, the speed increased dramatically.

"I think that the new generation BJ212 has achieved a qualitative leap in the current situation."

"All design specifications have met our goals, and the product is fully ready for mass production."

"I propose that the production management department and the purchasing department coordinate and arrange small-batch production now."

"If no problems arise in small-batch production and subsequent testing after one month, we will begin mass production."

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"At the same time, we will discontinue the production of the old BJ212, so that institutions at all levels can use the better BJ212 sooner."

With all of BAIC's key leaders present, Liu Chenggang immediately launched a meeting on-site.

No one objected to this proposal.

BAIC quickly took action.

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