Rebirth of the Auto Giant

Chapter 169 On-site Teaching

Breakfast the next day was also in the guest house. Director Chen had something to do and was unable to come, so he sent his secretary to have dinner with the three of them.

After the four of them finished their breakfast, the other party led the three of them to the front of the broken-down car.

The drivers all got out of the car, leaving Lao Wang with the three masters and apprentices.

"Master Wang just gives us the keys to the car. We will do the rest ourselves. Master Wang can go and get busy." Zhang Taiqin said.

"This..." Lao Wang hesitated.

What else can I do besides driving? I just came here to take a look, but that doesn’t work?

"Listen to Master Zhang, Master Wang, go and do other things." The secretary saw that the three of them did not want outsiders to be present, and he also knew that there were some things that he did not want outsiders to see.

"Okay, whatever tools you need are over there." Lao Wang said with some pity.

"Okay." Zhang Taiqin responded, and finally the secretary left with Lao Wang. At the same time, he also drove other people away to prevent strangers from approaching.

After the others left, Zhang Taiqin seriously preached to the two apprentices: "The most important thing when repairing a car is to diagnose the fault. Accurate diagnosis can improve efficiency and reduce unnecessary and redundant work."

"This is the most important thing. To achieve accurate diagnosis, you need to be very familiar with the theory of the engine's principle structure, two major mechanisms, and five major systems. What is the function of each system, what components do they have, and how individual are they?

You need to be clear about what will happen if a component fails, etc.”

"Otherwise, everything will be dark when you first start, and you will tear it apart at will. In the end, you won't find anything, and you will even tear apart other people's cars, which will also affect the image of our factory." Since he plans to teach two people attentively, Zhang Taiqin will now start to teach Wang Shi in the General Logistics Department.

I took out the training set and started teaching the two of them.

"You have been following me for so long, do you know what the two major institutions and the five major systems are?" Zhang Taiqin asked.

This was an on-site teaching. Zhang Taiqin took this opportunity to teach his two apprentices well. At first, he did not solve the problem so quickly, but instead asked them about it.

"Well, the two major mechanisms are the crank connecting rod mechanism and the valve mechanism. The five major systems are the starting system, the cooling system, the lubrication system and...and..." Lu Junying thought for a long time and couldn't think of any other systems.

"Tell me something." Zhang Taiqin looked at Jiang Chengxin and said.

"Crank connecting rod mechanism, valve train, starting system, cooling system, lubrication system, fuel supply system and exhaust system." Jiang Xingxin, who usually doesn't talk much, remembers it all.

"Well, that's right. You need to know the components of each system in each organization. I won't test you on this now." After Zhang Taiqin finished speaking, he added: "If it is a gasoline car, there is also an ignition system and the car engine.

The ignition and starting systems are both circuits belonging to the engine. They are different. They are both circuits at the same time. The ignition system of the gasoline engine is responsible for the operation of the engine.

The mixed gas in the plug chamber is ignited, which is mainly composed of spark plugs, high-voltage wires, high-voltage coils, and distributors. The diesel engine does not have an ignition system, only a starting system. The starting system generally includes a battery, an ignition switch, that is, a key switch that meshes with the engine flywheel.

Starter composition." Ignition system Zhang Taiqin uses the most commonly liberated platinum contacts to illustrate.

"Do you understand?" Zhang Taiqin looked at the two apprentices and said.

"I understand." The two of them had never seen their master so serious before, and they stood up straight and responded.

However, the more serious it was, it meant that the master had really begun to pass on the skills to him, and the two of them were excited when they thought about this.

"I just said that car engines have an ignition system compared to diesel engines. Do you know why?" Zhang Taiqin asked.

"I know this." Jiang Chengxin said.

"Tell me about it."

"Car engines use spark plugs to ignite, while diesel engines rely on piston to compress the mixed gas to the ignition point to automatically ignite, so there is no need for spark plugs, and there is no ignition system." Jiang Xingxin replied.

"That's right." Zhang Taiqin looked at this apprentice and nodded.

Although Jiang Chengxing usually doesn't talk much, he knows more than Lu Junying.

"This is why the compression ratio of diesel engines is higher than that of gasoline engines." Zhang Taiqin said.

The compression ratio of diesel engines is generally between 12 and 22, but the compression ratio of ultra-highly supercharged diesel engines can be as low as 8. The compression ratio of early gasoline engines was 6 to 10, but later the emission requirements were higher, generally between 9 and

Between 12.

Starting in 2011, the country required new cars to meet Euro IV emission requirements. During the same period, car manufacturers began to equip cars with high-compression ratio engines in large numbers.

The so-called ultra-high compression ratio car refers to a naturally aspirated engine equipped with a compression ratio greater than 11.5 or a turbocharged car equipped with an original compression ratio greater than 10.5.

"I understand, master." They both replied in unison.

"Okay, these are all tests of your theoretical knowledge. Let's take a look at the problems of this car, diagnose the problem based on the displayed fault symptoms, and then troubleshoot it. This is how to repair a car. The first thing is to determine the problem.

The fault point is followed by a professional disassembly and assembly process. This judgment is the most important." After Zhang Taiqin finished speaking, he started the car with the key.

"Beep beep." The engine started beeping, but it would not start. When I released the key, the car did not move.

Zhang Taiqin began to lecture on this phenomenon: "Looking at it now, the engine can rotate normally, which generally means that the inside of the engine is normal. Let's eliminate the mechanical failure inside first. Now let's see which component outside can cause this failure."

"As for the external systems, there are the intake and exhaust systems, the starting system, and the fuel supply system. Judging from the phenomenon just now, the starting system is normal. This can be ruled out, and then the only remaining ones are the intake and exhaust systems and the fuel supply system, master.

"Jiang Credibility Analysis said.

"That's right." Zhang Taiqin didn't expect Jiang Chengxing to analyze like this. He looked at Lu Junying, who always talked a lot, and said, "Junying, you should learn more from Chengxing. That's how it is when repairing a car. This judgment is very important. Disassembly and assembly are important.

For us, we can make up for it. We only need to stay in a dust-free engine installation workshop for a month or two and we will learn it. This diagnosis requires using our brains," Zhang Taiqin said.

"I understand, master." Lu Junying nodded and looked at Jiang Chengxin aside.

"Then, as you said, start lining up the fault points and lining up the possible points one by one. The first is the intake and exhaust system. Take out the air filter core to have a look, and also help users clean it up.

Air filter core.”

Next, Zhang Taiqin asked two people to remove the air filter core and check it. There was still a lot of dust. They shook the dust brush to brush it off. The two men found the factory employees, blew it with a blower, and then installed it.

Finally, I took out the intake and exhaust manifolds and checked them one by one. There were no problems.

Zhang Taiqin did not take any action during the whole process and let the two apprentices do it themselves.

I was busy until noon and had lunch.

Lunch was also in the guest house. The car hadn't been repaired yet. The food at noon was good, and there was beer. The three of them also drank some and didn't dare to drink more because they had to work in the afternoon.

Take an hour's rest at noon, then get up and continue working.

"According to your wishes, in the morning we ruled out no problems with the intake and exhaust systems, so we only have the fuel supply system. In the afternoon we will start to check them one by one, from the outside to the inside, starting from the easy to the difficult rules." Zhang Taiqin said.