Set sail1992

Chapter 1178 Comparison Test
When Ricardo Encina, Gustavo and other small and medium-sized farmers who were tickled by Alberto Veretinek plan to observe for a while, look at Alberto Veretinek When looking at the specific sales situation of this store in Tinneck, Zhang Qihang, who is far away on the other side of the Pacific Ocean, is currently in his own test track, looking at the three cars side by side with great interest.

Of these three cars, one is a domestic oil-stealing Prius, and the other two are Huateng Group's own hybrid versions of Sylphy... two hybrid versions of Sylphy?
Li Gong, who is in charge of this test, is explaining to Zhang Qihang: "Mr. Zhang, the three cars we tested today, except for the Stealing Prius, the Sylphy in the middle is equipped with our extended-range hybrid system. The one on the left is equipped with the E-cvt hybrid transmission that our group has just developed and developed based on your previous proposal of 'series parallel + direct drive'..."

Zhang Qihang interrupted Li Gong, staring at the new version of Sylphy, which is closer to the concept of DM-i or i-MMD hybrid transmission, and asked Li Gong: "Li Gong, in your test, compared to What is the overall performance of the car after installing the new E-cvt hybrid transmission for the original serial hybrid system? Especially how is the performance in terms of fuel consumption?"

"Very good! To be precise, it is beyond imagination!"

When he mentioned this, Li Gong was very excited, his face turned red because of his excitement: "In terms of structure, I know this gearbox is very powerful, but I didn't expect this gearbox to be more powerful than stealthy in terms of power and smoothness." When the oil otter's power-split E-cvt gearbox is so much stronger, the fuel-saving effect is so good..."

Looking at the excited Li Gong, Zhang Qihang smiled and comforted him: "Don't worry, Li Gong, please speak slowly."

Li Gong also realized that he was a little too excited, and he nodded a little embarrassedly: "I am a little excited... Mr. Zhang, let's put it this way, our hybrid gearbox still maintains the smoothness of the previous one." As for the power performance, although it is still the electric motor on the old Sylphy, the overall power performance is better than the original pure series hybrid system because of the addition of the parallel function.

As for the performance in terms of fuel consumption, it is even more important. The fuel consumption under low and medium speed conditions is even lower, and the high-speed energy consumption situation has also been significantly improved and improved. The current fuel consumption per 6 kilometers is less than 2.0. Compared with the cars with the same 1.2 self-priming engine, our fuel consumption is about [-] liters lower than theirs..."

Zhang Qihang nodded again and again. The original pure extended program system can only rely on the hard top of the electric motor for high-speed working conditions. The overall energy consumption performance is not particularly ideal, but this too brand new E-cvt hybrid transmission not only The parallel connection function is added, and the direct drive of the engine is also added. Combined with the "peak shaving and valley filling" capability of the whole system, it can make better use of every drop of fuel and every downhill kinetic energy recovery.

Li Gong, on the other hand, couldn't help getting excited after he said this: "I always thought that the power-split E-cvt hybrid transmission of the oil-stealing otter was the best solution for hybrid cars, and I even thought that there was no way at all. At the same time, both fuel saving and performance are taken into account, but now our E-cvt hybrid transmission needs to be fuel-efficient and performance-efficient, and the cost is lower than that of the E-cvt hybrid transmission. , really... really..."

Li Gong was so excited that he couldn't even find the right words to express his feelings.

It's no wonder that Li Gong is so excited. Before Zhang Qihang proposed the new E-cvt hybrid transmission structure of "P1 motor + P3 motor series-parallel connection + high-speed direct drive of the engine", in the eyes of Li Gong and other automotive engineers , the best and most optimal hybrid transmission structure is the power-split E-cvt hybrid transmission on the Stealing Oil Prius, and the Prius also proves it with its extremely low fuel consumption and relatively good high-speed fuel consumption. This caused Li Gong to think that there would be no better hybrid transmission than the power-split E-cvt hybrid transmission in the world.

Until 05, Zhang Qihang proposed the concept of "P1 motor + P3 motor series-parallel + high-speed direct drive of the engine". Hearing this concept on the first day of junior high school, Li Gong was shocked and immediately took the initiative to carry the E-cvt After more than two years of hard work in the research and development of the hybrid transmission and the supporting electronic control system, this DM-i/i-MMD type E-cvt hybrid transmission and the The supporting electronic control system has finally completed the development work and entered the testing stage.

"I understand." Zhang Qihang patted Li Gong's shoulder with sympathy: "Seeing that we have not only caught up in the field of hybrid power, but also found a new way to open up a technical route, you are happy about this, aren't you?"

"Yep……"

Li Gong nodded repeatedly.

Zhang Qihang smiled and said: "So, you are not excited yet, you have to develop and perfect this gearbox..."

Speaking of this, Zhang Qihang changed his tone and asked Li Gong: "Li Gong, what is the biggest problem you have encountered now?"

"No problem!" After finishing speaking, Li Gong also realized that the words were a bit full, and then explained: "It's not that there are no problems, in fact, we have encountered some problems now, for example, we found that in some very special cases, The gearbox will stumble occasionally. This is actually because the calibration of the gearbox has not been done well, and the control strategy is not perfect.

But this is normal, our testing work is to find problems that have not been found before, and correct these problems..."

Speaking of this, Li Gong clenched his fists vigorously and said confidently: "You have provided us with such an excellent technical route, and we cannot live up to your expectations!"

Zhang Qihang smiled and nodded: "It's good if you have this confidence... Well, according to the current progress of the project, how long do you think it will take to complete the field test of the gearbox and enter the road test stage?"

Although the proving ground can simulate most of the working conditions and climates encountered by a vehicle during driving, road testing is still an indispensable and necessary part of the entire vehicle testing process, even if it is The same is true 20 or [-] years later. At that time, several major national auto companies in China have successively established their own dedicated proving grounds, which contain all kinds of testing conditions and equipment, but road testing is still essential. Links, especially TLF in summer and Mohe in winter, have become the "must-see places" for road tests of major automakers. After the road test is completed, it means that this car is not far away from being launched up.

"About half a year is enough time," Li Gong replied confidently: "Speaking of which, the calibration and adjustment difficulty of our E-cvt transmission is actually not as difficult as the five-speed parallel shaft automatic transmission we did before. The difficulty of the box..."

Speaking of this, Li Gong slapped his head and asked Zhang Qihang: "By the way, Mr. Zhang, I've been wanting to ask you, should we develop an automatic transmission with more gears? The Mercedes-Benz E-Class has already started. The 7AT is used, the 8AT of Aisin has also been installed on the Lexus LS460, and the Crown has already started to use the 6AT. What do you think about us?"

It's no wonder that Li Gong is concerned about this matter. Thanks to the propaganda of the major OEMs, the public has formed a perception that for cars, the more gears the better, and the gears of the equipped gearboxes The more bits, the more upmarket the car.

These car manufacturers not only advertised this way, but also did so. For example, the 06 Mercedes-Benz S-Class and E-Class have begun to use 7-speed automatic transmissions, and the 06 Lexus LS460 has also begun to install 8AT automatic transmissions. Continue to insist on using ZF's 6AT, and the result is that the sales volume is immediately pulled down by the Mercedes-Benz S-Class...

As a result, although in the field of mainstream civilian vehicles, 4AT and 5AT are still the mainstream, and almost all compact cars and mid-level cars still use 4AT, but 6AT has gradually become popular. According to the current trend of development, It is estimated that within a few years, 6AT will be distributed to 20-yuan models.

Decentralization of products and technology has never been a problem, but if you don’t have one, that’s a problem. The parallel-axis automatic transmission “invented” by Zhang Qihang has entered the 5AT stage, and Honda even started to develop its own 6-speed parallel shaft automatic transmission according to the original authorization. In Li Gong's opinion, if everyone has 6AT and Huateng Industrial Group doesn't have it, will this actually lower the company's brand image?

However, there is also a problem with the parallel-shaft 6AT automatic transmission, that is, as the number of gears increases, the cost of the transmission increases sharply.

In the era of four-speed and five-speed, the cost of the parallel-shaft automatic transmission was almost the same as that of the four-speed and five-speed planetary automatic transmission. The basic structure of the gearbox has undergone tremendous changes, from the original three-shaft structure of the main shaft (input shaft), auxiliary shaft (intermediate shaft) and second shaft, one more shaft has been added to a four-shaft structure, and the clutch It also came to an unprecedented six, increasing the cost by almost a third.

However, the traditional planetary gear automatic transmission has developed from 4AT to 6AT, and the cost increase is less than 20%. In this way, the planetary gear 6AT automatic transmission has a huge cost advantage over the parallel shaft 6AT automatic transmission. The cost advantage, and cost is competitiveness!
What's more terrible is that the traditional planetary gear automatic transmission can easily superimpose gears up. Starting from the current 8AT, 9AT, 10AT and even 11AT are not a problem. Gears, the complexity and cost of the whole system will be fatal...

In this way, how can you compete with others?
As the chief gearbox engineer of Huateng Group, Li Gong naturally knows this, so now he is eager to know how the group plans on automatic gearboxes.

(End of this chapter)