"Ahh

When Gu Mojie's car slowed down frantically and accelerated again, the three girls watching on the sidelines all let out earth-shattering cries, and their pounding hearts rose and fell like riding a roller coaster. Pen "Fun" Pavilion www.biquge.info

After seeing that the car finally stabilized at a constant speed, the three girls all hugged each other weakly, fell to the ground softly, and patted each other on the back.

For a moment, jealousy became a thing of the past. If Gu Mojie really burps, they still have a woolen vinegar delicious.

The sudden braking was repeated two or three times, and then the car returned to the starting point of the test site, returned to the position where the girls were watching, and stopped steadily.

Balmonk proudly pointed to the test dashboard: "Did you see it clearly?" Just now, acceleration from 20 km to 120 km/h, automatic electronic timing, 1.8 seconds! As long as the secret technology carried by this car is not copied, no car on the earth can break this record within ten years! ”

Gu Mojie felt that he needed some time, so he pressed the churning lunch in his stomach first.

The car's acceleration of 100 kilometers per second has been very difficult after entering the "3-second era", and from 2006 to the present, Rambo has only improved by 0.2 seconds. According to this ratio, the 918x's "re-acceleration after hard braking, 1.8 seconds for 100 kilometers" is 0.5 higher than the "maximum test acceleration of 2.3 seconds" said at the beginning, which is really enough for human beings to fight for for more than 10 years.

"But...... How? It's not scientific. Why is the acceleration so ridiculously fast after braking and then accelerating again? Gu Mojie finished his breath and immediately threw out the puzzle in his heart.

After all, he is also a science student, and he studied law just to avoid being lazy. The curiosity of the science students burst out as soon as they were safe.

"Our Porsche electric car is, of course, integrated with the 'brake power recovery system'. The miracle you just saw is based on this system. ”

"You're talking about a 'kinetic energy recovery system', right? I know this, isn't it flywheel energy storage, or battery energy storage? But no matter how you look at these two systems, it is impossible to burst out with an additional thrust of a few hundred horsepower at once, right? I read a lot, don't lie to me! ”

Although Gu Mojie is a busy man, after he has money, he will inevitably enjoy some elegant and high-consumption sports.

For example, in Formula 1 cars, Gu Mojie also bought VIP tickets and watched a few games with binoculars, including the races in which Schumacher appeared.

He still has a certain understanding of the "kinetic energy recovery system" of sports cars.

The kinetic energy recovery of today's top racing cars on the market includes two modes. The first is called "flywheel mode", which uses the principle of pure mechanical energy storage.

For example, when braking, the main power system is connected to the accumulating flywheel through the gear through the clutch switching, and the kinetic energy of the car is converted into the torque elastic potential energy of the flywheel.

Then when the car passes the braking section and wants to accelerate again, the flywheel is reversed, and the flywheel is used to release elastic torque potential energy to make the car accelerate faster.

Figuratively, it is equivalent to a flying marble to slow down, and the best way is to let the marble shoot on the bowstring of the slingshot. The elastic potential energy that stretches the bowstring absorbs the kinetic energy of the marble, and when the marble is about to be fired again, the elastic potential energy can be reused.

However, this system has a drawback, that is, it has to introduce an additional set of "potential energy flywheel" system with a certain weight, which is equivalent to playing the role of "bowstring".

As we all know, for a flywheel to have a certain inertial potential energy, it depends on two data: one is that the mass of the flywheel itself is large enough, so that it can store more energy. On the other hand, it is to make the upper limit of the speed that the flywheel can reach when accumulating energy fast enough.

In racing, adding a heavy flywheel is impossible in the first place. Because the load of a sports car is precious, it is impossible to increase the weight of the whole vehicle by dozens of kilograms for a system that is usually useless and can only be used when braking.

It's okay to speed up the flywheel – by 2010, both Ferrari and McLaren were inflated to a crazy 60,000 revolutions per minute. If the frictional heat dissipation of the bearing is added and rotated, it will gradually become exaggerated to an unacceptable level.

Therefore, the flywheel energy storage mode has been proven by Formula 1 races: it can only store about 80 horsepower at most, which is its technical limit.

The re-acceleration and additional energy storage shown by this 918X just now is not limited to hundreds of horsepower! This is definitely not something that a flywheel can do.

As a result, there is only one mode left: electric energy storage.

Considering that this car is a hybrid vehicle, electric storage is really a high probability event.

electric energy storage, although its maximum energy storage capacity is much higher than that of flywheel systems; But it also has a disadvantage, which is that it is relatively inferior in terms of energy conversion efficiency.

This is easy to understand: the flywheel energy storage does not exist in the form of energy, but only the transmission of mechanical energy. From beginning to end, the energy that is recovered is in the form of mechanical energy.

Electric energy storage has two more energy conversions - first, the power generation state of the on-board motor must be reversed to absorb the braking kinetic energy, and then the mechanical energy is converted into electrical energy and charged into the battery. When it is time to accelerate again, the electricity in the battery is released and converted back to mechanical energy.

Every link of machine-electricity and electricity-to-machine conversion has considerable energy loss. Moreover, the overload of the battery is also limited, and it is impossible to increase the weight of the battery for a short period of overload, which is more than worth the loss for the weight reduction of the whole vehicle.

Therefore, judging from the electromechanical conversion efficiency shown on the earth before, the additional acceleration of 918x just now is still unscientific.

Porsche, there are additional killer features in this regard that all earthlings do not know about!

However, it is impossible to provide such a large instantaneous power in the way of power recovery, and the input and output of the battery are simply unbearable. What are your extra tips? Gu Mojie was puzzled and threw out a very professional question.

As soon as Balmonk heard it, he knew that Gu Mojie was knowledgeable, and he asked after thinking about it.

"Good question, it means that you are an expert gatekeeper. I'll get straight to the point -- we've added a 'super high frequency energy storage capacitor' system. ”

The "storage-discharge" of a capacitor is, of course, much more convenient than the "storage-discharge" of a battery, and the instantaneous output current is several orders of magnitude larger.

The battery has a maximum rated current, often given tens of amperes, and the maximum overload is 20%~30%, and it is impossible to double the overload. Capacitors don't have this problem, they suck and discharge instantly, and the current is almost not a bottleneck.

However, capacitors also have capacitance bottlenecks, one is that the total energy storage energy is often not large enough, and the other is that it can only be stored instantaneously and cannot be stored for a long time, that is to say, the stored energy should be used up immediately in a very short time. If you want to store energy for a long time, you still have to use batteries.

Balmunche said that Porsche's 918X is equipped with "super energy storage capacitors", which can only indicate that Porsche has made a major breakthrough in both indicators of capacitance, or it is possible to combine it with batteries or other technologies.

Theoretically, it is impossible for humans to achieve this level of energy storage even with the largest capacitors.

It must be done on the basis of ultra-high frequency and ultra-high capacitance capacitors, and also with the help of exquisite peripheral circuits that are difficult for other laymen to understand.

But whatever the subtle technical details, Porsche's R&D department has been working hard from start to finish on the big goal of "super-energy storage in a short period of time".

"How much horsepower can you add to your entire energy storage system in an instant? How long is the storage time? Gu Mojie thought about it and asked about two key indicators.

"An extra 480 horsepower! This is equivalent to tripling the power of the on-board motor in an instant! However, the trade-off is that this energy can only be re-released within 6 seconds, beyond which the energy will be dissipated. ”

It is 6 times more powerful than the usual storage mode and maximum energy storage power of Formula 1 cars!

But only 6 seconds!

Compared to the flywheel system and the battery system, 6 seconds is too short. The flywheel can hold energy for a few minutes, and the battery can last almost indefinitely.

Six seconds is a long time compared to the limits of what a conventional capacitor can achieve – because half of the circuits with very large capacitors are only a few tenths of a second. Porsche has put in a lot of black technology for this 6 seconds.

Gu Mojie was dumbfounded.

"After a long time, you have worked hard to put together such a system with perfect self-weight, energy storage density, and energy storage efficiency, and it can only be stored for 6 seconds? More than 6 seconds, or do you have to rely on traditional battery recycling? ”

"Yes."

"That'...... So what's the use of this feature when driving in real life? We usually drive, and we don't make the mistake of pumping and braking suddenly, and then accelerating sharply within 6 seconds. Aren't you a dragon-slaying skill, big and inadequate? ”

Balmunch's answer made Gu Mojie completely speechless: "No, it's useful, it can be used in Formula 1 races." If you usually drive...... Well, I heard that you Chinese made a movie called "Initial D". As long as you go to Akinayama and go to the 'Five Consecutive Hairpin Bend', this function can also be used. You don't have to drift anymore, just brake and enter the corner, exit the corner and accelerate sharply. Then you will be able to enjoy the thrill of watching everything on Earth explode in front of you and eat dust with you. ”

What does it mean to play in the city? It's called City Club Play!

Toyota and Tesla are conscientiously researching "how to use electric technology to make cars more environmentally friendly and fuel-efficient".

Porsche is also working how to use electric vehicles, but their direction is "how to use electric technology to maximize the 'instantaneous acceleration performance'." ”

What is the purpose of electric vehicles?

Energy conservation? What does it have to do with Porsche?

Environmental protection? What does it have to do with Porsche?

Convenient for precise and intelligent control? What does it have to do with Porsche?

Porsche's purpose,

One word, cool;

Two words, pretending to be forced.

In order to elevate the pretense to the perfection of exhaustion and contempt, they are also quite hard.

People don't want to save fuel, what they want is to let the rookie drive this car can get rid of the hairpin bending and cornering technology of the "Autumn Famous Mountain Bike God" in seconds!

Technically speaking, there is no other company on the earth that can spell out this black technology. The problem is that others don't think it's cost-effective, and they don't invest in research because of the economy. So in vain, Porsche took away a world first in this extremely small segment.

And it is estimated that no peer on the earth can keep up with the world's first in ten years.

"Okay, I'm really convinced, and I know the values of your Porsche people." Gu Mojie smiled bitterly and was speechless, and finally didn't forget to ask to confirm, "You did all these techniques yourself?" ”

Balmunche certainly knows this: "We do most of the system integration technology ourselves. The material science of supercapacitors and the electrode materials of automotive batteries are solved by looking for their old partner Siemens. ”

It turned out that it was used by Siemens, no wonder there was such an accumulation. In this world, if you want to talk about the accumulation of basic research on electrical materials, you have to look at General Electric and Siemens.

Gu Mojie leaned on the side of the car and muttered to himself, "It is estimated that there is still a little digging up here." We also have a high-end battery materials science laboratory under Hatsune Intelligence, which has been accumulated for many years relying on the Department of Hong Kong University of Science and Technology. Doing electrodes also has our own advantages. When the time comes, we can cooperate more deeply with Siemens.

As soon as I leave Stuttgart, I'm going to Munich to talk about more projects with Siemens and EOS, which has been working with us in the field of 3D printing. In the future, we will definitely be able to make greater improvements to our smart electric vehicles. ”

Balmonk smiled: "You are the boss, of course you have the final say in this kind of thing." What do you say to a test engineer like me? Are you going to call Wolf Boss here? ”

Gu Mojie thought about it, and also felt that he was a little funny and wandered away.

What do you do with this kind of small shrimp to talk about the company's strategy?

"That's right, then take your leave, thank you for the test."

Gu Mojie said and left the test site. Holding three girls in his arms, he sat in a broken car when he came up.

"Alas, after driving 918, and then taking this kind of car, it feels like riding an ox cart." Gu Mojie smacked his lips and complained unwillingly. That feeling of pushing the back explosively, it's really addictive to enjoy it once.

Would love to take another sip.

Lu Wenjun, who had been frightened for a while just now, immediately took out his wife's shelf and punched Gu Mojie fiercely: "Don't take this risk!" People who are worth nothing, and they still drive sports cars to play! ”

On this issue, Feliro and Bao'er are highly aligned. In Gu Mojie's impression, the girls have never been so consistent.

"Don't worry, I'll get a safe place to open. I will never go to the track like 'Akinayama' to pretend to be forced. Gu Mojie comforted Lu Wenjun, and then went back to his brain, figuring out how to take his world's only supercar around in the future.

"No, I have to give Fu Lao a call. Let him modify the tail hatch of the Boeing 787 special plane that will be delivered next year. I want the tail to be able to put down the door and drive the car out of the plane! ”

Gu Mojie couldn't help but think of Fu Luren, vice president of Boeing in the United States. Since he became friends with Fu Lao over the relocation of Ambassador Situ Leiden's ashes, Gu Mojie's relationship with Boeing has also improved a lot.

At this time next year, sitting on the world's only "originally scheduled Air Force One" Boeing 787 special plane, driving the same 918X on the earth for two years (even if there is a similar model in the future, it will only be a production version, and it is impossible to be exactly the same as the concept prototype), which is forced to break through the sky.

"Okay, don't be lewd, let's just say where we're going next." Fei Liluo couldn't stand Gu Mojie's little luck and interrupted him.

"Go to Munich and talk to someone from Siemens." (To be continued.) )