Set sail1992

Chapter 993 Prototype Car

Hearing Professor Wang's words, Zhang Qihang nodded: "Give me a general introduction?"

"Okay," Professor Wang nodded and said excitedly: "The whole miller cycle plan is carried out according to the plan you provided, Mr. Zhang. Compared with the 1KW liter power level of the 28.67NZ-FEX engine that steals oil, The liter power of our engine has reached the level of 40KW. The most important thing is that after a series of drag reduction measures and the removal of the outer wheel train, the thermal efficiency of our engine has reached 35%. The most important thing is , the area where the thermal efficiency area exceeds 30% exceeds 30% in the entire efficiency distribution."

Speaking of this thermal efficiency, Professor Wang is proud!

Of course he has reason to be proud, because after comparing the two engines, Professor Wang's team was delighted to find that the ratio of thermal efficiency has exceeded that of the 1NZ-FEX engine on the Stealing Oil Prius, even the Stealing Oil Prius is an Atkinson cycle engine specially designed for hybridization, but its thermal efficiency is only 34%, and in the distribution of the entire thermal efficiency zone, the thermal efficiency exceeds 30% only 27.5%. Now, Huateng Industrial Group We can already proudly say that this engine of our Huateng Industrial Group is the internal combustion engine with the highest thermal efficiency in the world today.

"So tall?" Zhang Qihang was also very surprised, he said pleasantly: "You guys have a lot of jobs."

According to Zhang Qihang's previous calculations, a thermal efficiency of 33% to 34% is not bad, but Professor Wang led his team to achieve this thermal efficiency of 35%, which is really remarkable.

"Ha ha……"

Professor Wang laughed a few times, and said happily: "During the process of improvement, comrades put forward a lot of ideas, which made the thermal efficiency of this engine increase to 35%, and it has such a high ratio of high efficiency area..."

Speaking of this, Professor Wang couldn't help but said with emotion: "With this engine, our group's hybrid technology is more than half done. Now it depends on the progress of Lao Wang's power battery."

Yes, the entire project is progressing faster than Zhang Qihang imagined. In addition to the dedicated hybrid engine, the motor and electronic control system have already taken out prototypes. The only thing that delays the progress is the power Ni-MH battery pack.

Different from consumer Ni-MH batteries used in mobile phones, laptops and other electronic devices, power batteries not only have much higher requirements for high-current fast charging and fast discharging, but also have far higher safety requirements than mobile phones and laptops. After all, no car manufacturer can afford the risk of its own car suddenly catching fire.

It was Professor Wang, who suddenly changed the subject when he said this: "Mr. Zhang, I have an idea about this hybrid car, and I want to hear what you think."

"You say."

"Isn't the battery pack on the Stealing Prius a power-type Ni-MH battery pack? Can we use the Ni-MH battery pack on the Prius to make two test vehicles?" Professor Wang said enthusiastically: "In this way, We can test the matching of the motor, electronic control system and the whole system first, and after Lao Wang’s power-type Ni-MH battery pack is produced, we can replace it with our own battery pack.”

Zhang Qihang's eyes lit up when he heard this, and he nodded again and again: "Yes, this is a good idea."

"Ha ha……"

With Zhang Qihang's approval, Professor Wang was very happy: "Then let's do this?"

"Just do it!" Zhang Qihang replied: "After the Beijing Auto Show last time, didn't many media say sourly that our hybrid system is still immature and can't be done. It's just right to complete the system as soon as possible. Calibrate and scare them at next year's Frankfurt Motor Show."

"Haha...it would be great if it could scare them." Speaking of this, Professor Wang hesitated for a moment and said, "Mr. Zhang, there is a question I've been wanting to ask you for a long time."

Seeing Professor Wang's hesitation to speak, Zhang Qihang couldn't help being a little curious: "You can ask any questions."

Professor Wang thought about it and said: "That's right, diesel vehicles are being popularized in Europe, and the fuel consumption of these diesel vehicles can be controlled to more than 4 to 5 kilometers per hundred kilometers. Obviously, those car companies in Europe are I am very optimistic about the application prospects of diesel engines, but I see what you mean, our group will not develop diesel engine technology in the future, but will focus on hybrid vehicles, is that right?"

Zhang Qihang didn't expect Professor Wang to think of developing diesel engines. He thought for a while and didn't answer directly. Instead, he asked, "Professor Wang, do you have any doubts about the hybrid technology route our group chose?"

Professor Wang's tone was still very tactful: "I can't say that I have doubts, I just feel a little confused, and I still don't understand some things."

"Well, what question, you say."

"The main thing is the cost of the whole system," said Professor Wang. "The fuel consumption of the Prius Prius and the Volkswagen Diesel Jetta is almost four liters per 3.2 kilometers, but the Prius equipped with a hybrid system , the manufacturing cost of the whole vehicle is 3000 US dollars, which is admitted by Stealing Oil Otter Motors, and the diesel Jetta equipped with a diesel engine, according to our calculations, compared with the gasoline engine, its cost increase does not exceed [-] US dollars, so we Why not go the diesel route?"

Zhang Qihang is actually not surprised that Professor Wang has such an idea, because even in the management of Huateng Industrial Group, there are actually quite a few people who have the same idea as Professor Wang, because compared to hybrid systems, diesel engines The cost advantage is too obvious, just like the two models mentioned by Professor Wang just now, the fuel consumption per 4 kilometers of the Prius and the diesel Jetta are both more than 3000, but compared with the gasoline Jetta, the cost of the diesel Jetta only rises It costs less than 1.7 US dollars, and the cost advantage is obvious; in contrast to the Prius car, it’s almost a snot and a tear: a Prius priced at 3.2 US dollars costs [-] US dollars. It can be said that stealing oil otters can be said to sell one and lose one, and it is no different from hitting a swollen face to make a fat man, and it is still the kind of pig's head...

Some comrades said, such a comparison, it is obviously better to develop diesel engine technology. After all, our automobile industry is underdeveloped, and we are still in the stage of "crossing the river by feeling the stones". Since we are crossing the river by feeling the stones, then Why not touch the diesel engine?
Obviously, although Professor Wang is in charge of the core subsystem of this hybrid system: the person in charge of the research and development of the Miller cycle gasoline engine project, he also has some doubts about the future of this project, and he is a little worried about Zhang Qihang's choice of technical route .

But in all honesty, Professor Wang's thoughts are also for the company's consideration, out of good intentions.

For this kind of kindness, of course I can't live up to it, so Zhang Qihang nodded first and said, "I understand what you mean."

After a short pause, Zhang Qihang continued: "Compared with traditional gasoline engines, the energy-saving advantages of diesel engines are indeed obvious, and at this stage, the high cost of hybrid systems is also a very practical problem. From these two points, development Low-cost diesel engine technology seems to be a better technical route."

Professor Wang nodded: "Yes, many comrades think so."

"As for why I insist on developing hybrid technology," Zhang Qihang said with a smile, "The reason is actually very simple. I think the end of hybrid is pure electric."

Professor Wang's face was full of shock: "Pure electric?"

"Yes," Zhang Qihang nodded and replied, "In my opinion, hybrid technology is the starting point of pure electric power. The reason why hybrid technology is developed is that at this stage, battery technology, electronic control technology, and motor technology are still very immature. , the cost is also very high, but with the promotion of technology, the three-store technology of electric vehicles will not only become more and more advanced, but also the cost will become higher and higher. You can think about it, if one day in the future, the energy density of the battery reaches 150 to 200Wh/Kg, but the cost has been reduced to only about 1000 RMB per kWh, what kind of scene will it be like then?”

Zhang Qihang actually thinks that with the continuous development of technology, in the future, the energy density of automotive power batteries can reach 150 200Wh/Kg?Can the cost be reduced by 1000 yuan per KW·h?Professor Wang's eyes were rounded, and he tremblingly said: "This...is this impossible?"

It's no wonder that Professor Wang is so surprised. It's really that the energy density and cost are somewhat beyond Professor Wang's imagination.

Although Professor Wang majored in internal combustion engines, because he participated in the big project of hybrid power, he also has some understanding of automotive power battery technology. Simply put, the energy density of current nickel-metal hydride batteries is about 50Wh/Kg, which is high-end. The energy density of lithium-ion batteries can reach about 70Wh/Kg. As for the cost of batteries that can store one degree of electricity per KW·h, nickel-metal hydride batteries are about 20000 yuan. The cost of a hydrogen battery pack is about 30000 yuan per kilowatt-hour, and the cost of a lithium-ion battery is even higher, exceeding 40000 yuan per kilowatt-hour. The cost of ions is so high, tens of thousands.

Why did Prius choose Ni-MH battery as its power battery?

In addition to the better safety of Ni-MH batteries compared to lithium-ion batteries, cost is also a key consideration for thieves: the battery pack is already very expensive, so save a little if you can.

Arguably, the biggest reason why the Stealer Prius is so expensive is the 1.76-kilowatt-hour NiMH battery pack—a NiMH battery pack costs roughly $6500, plus Isn't the cost of the electronic control system and the complex and sophisticated E-CVT gearbox not cheap?

But if it is really like what Zhang Qihang said, with the development of technology and scale effect, the cost will continue to decrease, and the energy density of batteries will continue to increase. In the future, the energy density of batteries can reach 150 to 200Wh/Kg, and But the cost can be reduced to 1000 yuan per kWh, which means he is too clear.

"How is it impossible?" Zhang Qihang asked back with a smile: "It's like a computer. How much did a computer cost in the 70s and [-]s? But now? I think Moore's Law can be applied not only to computer chips, but also to Applicable to the battery field to a certain extent."

"If that's the case...if it's really the case..." Professor Wang was so excited that he couldn't help but said, "Then in the future, it's really possible to have pure electric cars."

"Yes," Zhang Qihang nodded and said, "Not only will there be pure electric cars, but I think the cruising range of these pure electric cars can even reach more than 500 kilometers."

"500 kilometers of battery life?" Professor Wang tremblingly said: "No, no, no, no 500 kilometers, even if only 150 kilometers to 200 kilometers of battery life, this electric car has practical value and promotional value."

After listening to Professor Wang's words, Zhang Qihang couldn't help but sigh with emotion: experts are experts, and the mileage evaluation criteria given are really accurate. In 2015, when electric vehicles have just started to be fully promoted, electric vehicles such as Chery EQ and BAIC EV160 have a long range. Doesn't the mileage start at 150 kilometers?

He nodded and replied: "Yes, a cruising range of 150 kilometers is worth commercial promotion, and Professor Wang, you think that once the cost of batteries is reduced and the capacity is increased, hybrid vehicles will also benefit—Professor Wang, You know the reason why our group adopts the hybrid route is to reduce energy consumption. Based on this, let’s make an analogy. For example, in order to promote the development of new energy and hybrid vehicles, the country has developed battery technology After a certain level, it is mandated that the pure electric mileage of hybrid vehicles must reach 50 kilometers, what do you think will happen under such circumstances?"

"The state mandates that hybrid vehicles have a pure electric mileage of 50 kilometers?" Professor Wang frowned and said, "If it is really possible to achieve a pure electric mileage of more than 50 kilometers, that is of course a good thing. The pure electric mileage is basically It can already meet the single-day travel needs of ordinary wage-earners, which means that in most of the use time, users are using this car as a pure electric car, but your idea is good, but it is not very good in practice. Can you do it? Besides, there is no reason for the state to force companies to do so.”

"Of course the state will not force companies to do this, but it can be guided by policies," Zhang Qihang said with a smile: "For example, the state will give certain financial subsidies to hybrid vehicles that meet this target, exempt vehicle purchase tax, and even In Beijing, Shanghai and other cities where license plates are restricted, there is no limit on the purchase of this type of vehicle...

You said, under the guidance of national policies, will major automakers make efforts in this type of hybrid models?And the major auto companies have seen so many and such great benefits, will they make efforts in the field of hybrid power, and will such efforts lead to a reduction in the cost of the entire three-electric system? "

The reason why Zhang Qihang dared to say this is because the country is doing this in order to promote new energy vehicles.

(End of this chapter)