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Ford's transmission adopts a wet structure, which means that the transmission is full of lubricating oil, and the gears work together under the lubrication of the lubricating oil.

While this lubricating oil plays a lubricating role, it also plays a prominent role in friction, protecting gears, synchronizers, bearings and other components.

At the same time, the lubricant itself must have good thermal stability, oxidation stability, anti-corrosion and other functions, and it must also play a role in cooling the inside of the transmission.

You need to know the working principle of a dual-clutch transmission. When the car is working in one gear, another set of clutches will be in a standby state. In this way, if you are driving in a congested urban area, there will often be a set of clutches inside the transmission.

In the standby state, it will cause problems such as excessive oil temperature inside the gearbox.

Although the lubricating oil inside the transmission will be water-cooled or air-cooled through the oil cooler, it still faces the problem of excessive oil temperature.

After all, they are just using ordinary engine oil, and because of the working principle of the dual-clutch transmission, what this transmission needs is special engine oil with better cooling performance and more outstanding thermal stability.

This kind of engine oil may be everywhere in a few years, but now when dual-clutch transmissions have just been popularized, they are still very rare.

Even Volkswagen was stumped by this problem, and in the end they even had to adopt a dry dual-clutch transmission without lubricants, which shows how difficult this problem is.

After Volkswagen's G-speed wet dual-clutch transmission was launched, it quickly encountered such a problem. However, the answer given by Volkswagen at that time was that the oil temperature sensing element inside the transmission was not up to standard, etc., so it covered up the problem.

passed.

Later, when the vehicles were recalled, all the cars were replaced with 6at transmissions. Later, when dual-clutch transmissions were promoted, they were simply replaced with 7-speed dry dual-clutch transmissions so that they would not be affected by excessive lubricating oil temperatures.

Troubled by problems.

However, the dry dual-clutch also has its shortcomings, that is, it cannot withstand excessively high torque. Once the engine power is too large and the torque exceeds 200 Nm, this transmission will be difficult to cope with.

So this is also the reason why Jin Xiaoqiang did not use a dry dual-clutch transmission. Because the ecobo0st engine of his car is a powerful engine, it will definitely not be able to cope with a dry dual-clutch transmission.

That's why he copied Ford's wet dual-clutch transmission. But now the machine's mechanism design, component processing and assembly are no longer a problem. Unexpectedly, he was stumped by the issue of oil temperature cooling.

In a dual-clutch transmission, because the gear shifting response is quick, the gear exchange inside the transmission is very frequent, so after the transmission has been working for a period of time, the oil temperature is generally very high.

When an ordinary automatic hydraulic transmission is working, the internal oil temperature is also very high, usually reaching about 90 degrees to 120 degrees. Therefore, the popular transmission lubricants on the market are generally developed for this temperature.

The temperature generated by the dual-clutch transmission that Jin Xiaoqiang and the others developed during operation is much higher than this temperature, especially the first and second gears, which are gears with such high torque, and these two gears

It is also the gear that must be used when the car starts, so the oil temperature inside their transmission often exceeds 120 degrees and sometimes even exceeds 150 degrees.

Once this temperature is exceeded, the temperature sensing element inside the transmission will strike, which will lead to problems such as the transmission's failure, the car's sudden stop, and squeaking.

In order to solve this problem, Jin Xiaoqiang and several transmission engineers have stayed up for several nights in their laboratory.

Fortunately, they no longer work in their old gear factory. The laboratory and smelting center they built in the original old steel mill have long been completed and put into use.

There are sufficient logistical equipment here, and there is even a lounge in the design laboratory. When you are tired or sleepy after studying every day, you can go to the lounge to take a nap.

In this way, Jin Xiaoqiang has been working here for six consecutive days, but this problem has still not been solved.

In the past few days, they have used various means to adjust the oil cooling problem, but they have tried again and again but nothing is ideal.

They have tried changing the structure of the oil cooler, increasing the length of the cooling water pipe, or trying air cooling, but the results are not ideal.

Either the problem cannot be solved at all, or the problem can be solved, but it requires major surgery on the entire transmission, which will increase the weight of the transmission or change the entire structure, which will cause considerable damage to the matching of the transmission and the engine.

of difficulties.

Jin Xiaoqiang never expected that Goldfinger, who he thought was quite powerful, would actually be stumped by a lubricant this time?

It is true that in later generations, in order to cope with the emergence of dual-clutch speed reducers, many petrochemical companies have adjusted their technologies and developed corresponding thermally stable lubricants with better performance. Even China's petrochemical companies can make specialized lubricants.

Lubricant for dual clutch transmissions.

But that will have to wait until a few years later. Jin Xiaoqiang has no time to wait for a few years. He had previously boasted to the German and Chinese media that he would launch a new car at this year's Frankfurt Motor Show.

But now there is less than a month left, but he is stuck on the lubricating oil of the transmission, and has been unable to make progress. How can this not make him anxious and angry?

What he copied was the original Ford dual-clutch transmission, but why didn't Ford encounter such a problem when it launched this transmission in a previous life?

That's because four years later, the technology of this lubricant has matured, especially in countries with developed chemical technology like the United States. They have solved the problem of equipping the dual-clutch transmission with corresponding lubricants in a few years, so Ford's

Once the transmission was launched, it was well received and affirmed, and it did not cause the same problems as Volkswagen.

But a few years later, even Volkswagen is now troubled by this oil cooling problem, and they are also trying to figure out how to solve this problem!

How difficult is this problem? Just look at how Volkswagen was forced to have no choice but to replace it with a new dry dual-clutch transmission.

Before you know it, time has arrived on September 5th, and there are not many days left until the Frankfurt Motor Show is held.

The Frankfurt Motor Show is one of the four major auto shows in the world. With a history of more than 100 years, it is regarded as a grand event for global automobile manufacturers. Every year, exhibitors from all over the world bring their new products to the Frankfurt Motor Show.

This auto show usually starts in mid-September. The opening day of this year's Frankfurt Auto Show is September 18th. Not long ago, Wang Jiao had gone to Frankfurt to prepare related matters.

According to the results of the discussion between Jin Xiaoqiang and the company's senior management, what they will exhibit at the exhibition this time are their newly developed Regal and LaCrosse concept cars, and they will also bring the Tough Guy series.

However, in terms of powertrain, they will bring prototypes of the ecoboost and dual-clutch, while the actual mass-produced car may not be launched and met with the majority of car enthusiasts until the Shanghai Auto Show next year.

After all, even if Jin Xiaoqiang’s golden finger is strong, it is impossible to produce so many mass-produced cars within a few months, so bringing a few concept cars is already very embarrassing.

The focus of the hype this time is the ecoboost engine and their upcoming dual-clutch transmission. Now there is no problem with the engine, but the transmission is stuck. Jin Xiaoqiang and other senior executives of the company are extremely anxious.

The company's senior management saw that the transmission had been unable to overcome the problem of lubricating oil. They once advised Jin Xiaoqiang that if it didn't work, just use the company's 6at transmission. After all, the technology of this transmission is still relatively mature. At present, the company

It can be produced without difficulty.

But Jin Xiaoqiang has never agreed, because he knows that their 6at may be enough if it is equipped with a V6 ecoboost engine, but it will be difficult to deal with a V6 ecoboost, so now it is best to use this dual-clutch transmission

Take it out.

Moreover, since Volkswagen launched the dual-clutch transmission last year, it has not been launched yet, but this concept has been highly hyped in the market, and Jin Xiaoqiang does not want to lag behind others.

And just this year, due to the emergence of Jin Xiaoqiang and Huayang Power, Volkswagen has also felt the pressure. They even plan to introduce the dual-clutch transmission product that was originally planned to be introduced in China in 2005 to the mainland market by the end of this year.

So this makes Jin Xiaoqiang feel more pressure. He is not only planning to compete with Volkswagen. He has put a lot of effort into these two current cars, but he plans to compete with cars of the same level as BMW and Mercedes-Benz.

So how could he give up halfway and fall for this transmission? He really felt unconvinced!

The senior executives in the company couldn't resist Jin Xiaoqiang, and in the end they all decided that Jin Xiaoqiang would have to take the sample car to Frankfurt in the morning.

If the problem of excessive internal temperature of the transmission can be solved before then, then this car and the company's 6at can only be used as substitutes and temporarily appear at the auto show.

This is the backup plan... Although the configuration of such a car is not low and the technical content can be said to be quite high, Jin Xiaoqiang still feels unhappy.

In his opinion, the 6at transmission is not worthy of their current cars. It feels that the technical content is at a higher level than BMW and Mercedes-Benz!!

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