The car giant started by marrying the daughter of the king

Chapter 123: Unraveling the Mystery, Jiang Hui Shows His Prowess

"From the current situation, there is no obvious wear on the clutch plate of this gearbox, so the problem should not be with the clutch plate."

"Then let's check whether the sensors and solenoid valves are loose."

"In many common engine and transmission failures, it is often because some parts are not installed properly, resulting in loose interfaces and the inability to function properly."

Jiang Hui ignored Kato Hiroyuki. After listening to Jiang Hui for a long time, the latter had a basic understanding of Jiang Hui's technical strength.

When previous repairmen learned that the Crown used an electronic fuel injection engine and an automatic transmission, they basically didn't even have the courage to take it apart to confirm the problem.

This situation is similar to the failure encountered by the U.S. Liaison Office in Beijing.

But Jiang Hui was not only confident that he could repair it, he also looked very skilled in the disassembly process.

Although Kato Hiroyuki was very curious about why a young man like Jiang Hui was so familiar with those new international car engines and gearboxes, he did not ask more questions.

Seeing that there seemed to be little point in staying at the scene, Kato Hiroyuki finally left.

"Master, the devils are gone."

When Chen Chenxing saw Kato Hiroyuki walking away quietly, he immediately said something beside him.

"It's better to leave. Let's quickly troubleshoot the problem and fix the gearbox first."

Jiang Hui glanced at Kato Hiroyuki who was about to disappear in the distant corner, and decided to solve the problem first and then consider other things.

"Well, there is an engine failure that needs to be repaired later. If we want to go back early today, we really need to hurry up."

On the way here, Jiang Hui had already roughly told us about today's arrangements.

After a hard day's work in the morning and some finishing work after lunch, today's car repair task is completed.

"We will then look at the installation of these parts and preliminarily confirm that there are no problems."

"Although we cannot completely rule out the possibility that these parts are faulty, we will not conduct further confirmation on the sensors and solenoid valves until other issues have been sorted out."

"After all, it is difficult for us to simply visually check whether a precision part like a sensor is damaged."

"It can only be determined by replacing the product with a new one to confirm the change in the fault and other obvious fault phenomena..."

Jiang Hui continued to explain the situation to Chen Chenxing while quickly troubleshooting various problems.

"Let's take a look at the transmission oil pump. A transmission oil pump failure will cause the hydraulic system to not work properly, affecting the transmission's shifting function and lubrication effect."

"It is a frequently problematic part in transmission failures."

Speaking of Cao Cao, Cao Cao will arrive.

Just when Jiang Hui said that the transmission oil pump often had problems and removed it from the transmission, he immediately found that the entrance of the oil circuit was full of dirt and impurities.

"You see, the oil pump oil circuit is clogged with impurities, dirt, etc., which will cause the oil pump to be unable to supply oil normally and affect the operation of the gearbox."

"When the transmission does not shift gears when the accelerator is pressed, nine times out of ten it is caused by a transmission oil pump failure."

Jiang Hui's words made Chen Chenxing feel relieved.

The fault has been found, and it looks like today's car repair task can be completed smoothly.

"Master, this oil pump is clogged, how should we clean it?"

Now that the problem has been found, we need to consider how to solve it.

"This isn't that complicated. Just take it apart and clean it. But you have to be very careful during the disassembly process."

As Jiang Hui spoke, he changed tools and started to work.

"We need to loosen the oil pump bolts in a symmetrical and cross-order to avoid damaging the aluminum alloy front cover of the oil pump."

"During removal, handle the oil pump front cover and housing carefully to prevent damage."

"After disassembly, use a clean rag and brush to thoroughly clean all metal parts of the oil pump."

"After cleaning, apply a little automatic transmission fluid to the parts. When reassembling, make sure all parts are installed correctly to avoid damaging the oil pump or other parts of the transmission."

In less than twenty minutes, Jiang Hui completed the disassembly, cleaning and reassembly of the oil pump, and then reinstalled the 4AT gearbox on the car.

Then Jiang Hui did not start the vehicle directly to confirm whether the gearbox failure had been eliminated, but continued to explain the Crown's 2.6L electronic fuel injection engine with Chen Chenxing.

"We have just preliminarily determined that the engine failure is a sensor failure that caused the ECU to cut off fuel for protection, thus causing the engine to stall."

"The first thing we need to do now is to confirm whether all sensors are installed in place and whether any of them are loose."

"As long as we find the loose sensor and reinstall it, the problem can be easily solved." With the help of Chen Chenxing, Jiang Hui began to disassemble the engine.

Some sensors can be seen directly without removing any parts, but some require removing some parts to see.

Of course, Jiang Hui will disassemble the engine regardless of whether it is necessary or not.

On the one hand, it made Hiroyuki Kato realize that the failure of their vehicle was quite serious and it was very difficult to repair, so it was normal that other repairmen outside could not handle it.

On the other hand, it is also a process of teaching and self-learning.

Such a good opportunity cannot be missed.

“Engine sensors are an important part of the automotive engine management system. These sensors work together to provide key data support for the normal operation and optimized control of the engine, ensuring that the engine can operate efficiently and reliably under various operating conditions and meet emission and performance requirements.”

"There are nine common types of sensors on car engines. We confirmed them one by one."

These basic knowledge have no technical content at all for Jiang Hui, but they are very rare knowledge points for Chen Chenxing.

The cultural level of Chinese auto mechanics is generally not very high, so it is very difficult for them to summarize their experiences and leave written records.

More often than not, they summarize and pass on their experiences through word of mouth between master and apprentice.

This kind of summary is often full of personal color and lacks systematicity.

It is extremely rare and precious to see someone like Jiang Hui who can sort out various knowledge points and problems one by one so that people can understand the situation clearly.

"The first is the air flow sensor, which works by measuring the air flow entering the engine and converting the air flow information into an electrical signal."

"It is a key sensor for determining the amount of air intake in the engine, providing accurate air volume data to the fuel injection system to ensure the proper fuel mixture ratio..."

"This is a camshaft position sensor. It generates corresponding signals by detecting the position and rotation angle of the camshaft. Its function is to determine the opening and closing time of the valve to ensure the normal valve timing of the engine..."

"This is a coolant temperature sensor. As the name suggests, its function is to measure the temperature of the engine coolant and output a corresponding electrical signal."

"The engine's ECU combines information from the coolant temperature sensor to control the operation of the cooling fan, adjust the engine operating temperature, and correct the injection amount and ignition advance angle..."

Jiang Hui disassembled the engine while finding the location of various sensors.

"Master, this sensor doesn't seem to be installed properly!"

Just as Jiang Hui was pointing at a sensor and introducing it, the sharp-eyed Chen Chenxing had already sensed that there was a problem with the installation of the sensor.

Jiang Hui shook it and said, "Yes, the throttle position sensor is loose."

"The function of this sensor is to monitor the opening of the throttle valve and convert it into an electrical signal."

"Its function is to reflect the engine load status and provide the control unit with throttle opening information for adjusting the injection amount and ignition advance angle, etc."

"Once a fault occurs, the ECU has no way of obtaining an accurate signal, and for the purpose of protecting the engine, it will send out a signal to shut down the engine."

"This is also a new fault that is prone to occur in electronic fuel injection engines."

Jiang Hui breathed a sigh of relief. The problem was easily solved. It was relatively easy to get the $1600 today.

Of course, even though the problem has been found, it’s already past eleven o’clock, so I definitely have to get some lunch first.

The lunch at the Japanese Embassy is definitely much more sumptuous than just eating out.

After all, Japan at that time really had no shortage of money.

People are waving their money and shopping all over the world. The main increase in sales of various luxury goods such as LV is contributed by the Japanese.

“Is the main reason for the EFI engine to stall is sensor failure?”

The problem was found, but the car could not be repaired so quickly. Naturally, Chen Chenxing had more time to learn other maintenance knowledge from Jiang Hui.

"That's definitely not the case. This time I would judge it to be a sensor failure, and I also combined some information from the fault light to make this judgment."

"If we want to comprehensively sort out the problem of EFI engine flameout, we must start with the working principle of the electronically controlled fuel injection system."

"That's why I've been asking you to read more books like "Automobile Structure" and "Principles of Internal Combustion Engines" and visit more parts factories to learn more about the situation. It's because if you know the working principles of each part, you can better understand the causes of failures and how to repair them."

There was still some time before lunch, so Jiang Hui prepared to explain the car repair matter to Chen Chenxing in detail.

During this period of time, Chen Chenxing has helped me a lot, and he is a very qualified apprentice.

Since he is so interested in car repair, I will teach him how to do it.

Maybe in the future Chen Chenxing could open a car repair shop, or even a car modification factory, which might have some intersection with his own car empire.

(End of this chapter)