Under the watchful eyes of everyone, the first ceramic engine in history with practical value slowly but firmly reached the maximum speed of its theoretical design: 20,000 revolutions per minute! At the same time, at the moment, the maximum output of this engine reaches an astonishing 60 hp!

It's a miracle to reach 60 hp with a 250 cc displacement without any modifications – even if it is magnified ten times in equal proportions, even the most sophisticated and rigorously modified engines will never be able to achieve a 250 hp displacement of 600 hp – either turbocharged or liquid nitrogen!

This speed exceeds the maximum speed of the F1 engine, the maximum speed of the MotoGP racing engine, and the highest speed record of all civilian, military and competition internal combustion engines in the world.

At this moment, whether the engine can run normally, a key point is the working temperature of the engine, Zhang Lan took a look: at this moment, the working temperature of the engine is 1250 degrees Celsius, and there is still 50 degrees Celsius rising space from the highest 1300 degrees Celsius, that is to say, when the speed of this engine reaches the theoretical 20,000 revolutions per minute, it is inconceivable that there is still room for further improvement!

Zhang Lan looked at the monitor, smiled wryly and shook his head: Fortunately, when this analog speed software was designed, the meter head was designed to 25,000 rpm, instead of the original theoretical maximum speed of 2,000 rpm, otherwise there is really no way to carry out this test now!

To test whether the engine could still work at up to 20,000 revolutions per minute, the hard-working engine started running at full speed again for half an hour. \\\ As for whether it can run safely and smoothly for half an hour, don't talk about Zhang Lan, even Xie Fei, the chief designer of this engine, has no bottom in his heart.

Half an hour is not fast, but it is not slow. Half an hour later, Zhang Lan, who had been paying attention to the operation data of the engine, and the engineers were pleasantly surprised to find that the working temperature of the engine was still maintained at the previous 1250 degrees Celsius. The operating data of the engine is still normal.

In other words, after testing that this engine can reach the theoretical design limit, the following can really test where the actual limit of this engine is. \\/\

When they arrived, there was not a single one in the room who spoke, and they all held their breath and stared at the few displays in front of them that displayed various data of the engine: the engine rpm slowly increased upwards until it reached 20,500 rpm. The engine is working normally, all the data about the performance of the engine are normal, the instantaneous fuel consumption of the engine is 4 liters, and the engine operating temperature reaches 1265 degrees Celsius; At 20,800 rpm, the engine is working normally, all the data about the performance of the engine are still normal, and the instantaneous fuel consumption of the engine is 4.2 liters. The engine operating temperature reaches 1280 degrees Celsius. There is also room for further improvement; 21000 rpm and the engine is working fine. All the data on the performance of the engine are normal, the instantaneous fuel consumption of the engine is 4.5 liters. The operating temperature reached the design standard of 1300 degrees Celsius, which means that this engine is used. The maximum actual speed exceeds the theoretical speed by a full 1000 rpm!

At this time, a bright red number on the display next to the engine power output attracted the eyes of those present: 62 horsepower!

It's just that. Zhang Lan knows that this speed is the maximum speed of the engine without any load, and it is also the most ideal situation. \\\ If the engine is mounted on the car, the weight of the body plus the weight of the driver, with this load of more than 100 kilograms, the actual working speed of this engine should be able to maintain around 20,000 revolutions per minute.

The next step is to comprehensively test how long this engine can last at such a high speed, and everyone is looking forward to it in their hearts, whether it can still last for half an hour like just now?

Everyone prayed silently in their hearts, watching the countdown time dwindle and dwindle. Half an hour has passed, and the engine is still maintained at the original state of 21,000 revolutions per minute, all the data are normal, and this test is a great success!

What if you continue to increase the engine speed? What would that look like? Everyone was curious about this possibility, and Zhang Lan was naturally no exception.

Xie Fei was also looking forward to this problem, and said to the staff member in charge of engine throttle control, "Continue to increase the throttle and see where the limit of this engine is?" Well, be careful, add slowly. ”

However, this time it didn't last long, when the engine speed reached 21,500 rpm, there was a "boom" sound in the engine, and then the engine trembled violently, and then after a puff of smoke came out of the silencer, the engine stopped there as if it was dead. \\

What's going on? Why is the engine broken? Almost everyone has put this question on their faces: is it a problem with engine design? Is it a problem with the engine material? Or is it something else?

At this moment, the temperature on the surface of the engine has reached several hundred degrees, and the heat is simply impossible to get hands on, although everyone is full of questions, but they can only wait until the engine cools down, and then the engine can be disassembled and analyzed to draw the conclusion of why the engine is broken, and where is the reason. As for now, although everyone is anxious, it will take a while to wait for the engine to cool down.

After the high-power cylindrical industrial ventilation fan blew the cold air of about zero degrees in winter, and quickly lowered the temperature of the broken engine to the extent that it was enough for disassembly and analysis, the design team that was already waiting on the side immediately pounced on the engine to disassemble and analyze. At this moment, these guys give Zhang Lan the feeling that they are not dismantling an engine, but like a group of wolves grabbing meat to eat. \\\

The results of the analysis came out quickly: it was not a problem of design, or even the problem of ceramic material that everyone was worried about, but a problem with the connecting rod and crankshaft that everyone had not thought of before: it turned out to be continuous long-term high-intensity operation, and the crankshaft and connecting rod could not hold up at first and broke. Then, these broken parts relied on the huge inertia to continue to run uncontrollably inside the engine, and the internal structure of the engine was rapidly destroyed by the broken connecting rod and crankshaft, and almost all the parts in the engine were damaged to varying degrees. ,

Hearing the results of this analysis, everyone breathed a sigh of relief: this analysis result also means that there is no problem with their design! There is no problem with the ceramic material formula I designed before! This ceramic engine designed by himself can now be truly called a success!

As for the broken connecting rod and crankshaft? Oh, that thing is made of alloy, because the required strength is too high, the ceramic can not be reached, only high-strength alloy can be used, but I didn't expect this high-strength alloy to break under such a high speed of operation, no wonder the engine speed of the internal combustion engine has never exceeded 18,000 rpm, it turns out that there is a reason for this.

Although one engine has been scrapped, everyone's mood is very good, and the performance of the machine has exceeded the limits of the design theory, what else is there to say?

Especially in terms of the overall performance of the engine, it makes Zhang Lan smile from ear to ear: now the 250 cc motorcycle engine, even if it adopts a high-speed active water cooling model, it seems to be a Japanese Kawasaki 250, and the maximum power output can only reach about 40 horsepower, which still needs to be forcibly increased to achieve fuel consumption.

In the case of the 250 cc engine used on the Alice Ducati Diana Mark 5S, which has the best power performance in its own company, when the instantaneous maximum power output reaches the limit of what it can achieve: 38 horsepower, the instantaneous fuel consumption of the engine has reached 8 liters of oil per 100 kilometers!

And this ceramic engine, when the maximum speed reaches 21,000 rpm and the maximum output reaches 62 horsepower, its maximum instantaneous fuel consumption is only 4.5 liters! The fuel-saving advantages of ceramic engines are vividly reflected at this moment! Saving fuel means saving money, of course, and that's the most obvious truth.

As for why the ceramic engine is more fuel-efficient while increasing the power, the reason is very simple, because the working temperature of the ceramic engine is very high, which can increase the efficiency of the ceramic engine by about 30% to 40% compared with the efficiency of the traditional metal engine, and the ceramic engine further saves energy because of the advantage that the heat of the ceramic itself is not easy to dissipate; At the same time, the higher engine operating temperature can make the combustion efficiency of the fuel more sufficient, and the harmful components in the exhaust gas will naturally be greatly reduced, which not only reduces energy consumption, but also reduces environmental pollution.

The advantages of improving combustion efficiency, heat dissipation and combustion is more sufficient, these three aspects are reflected in the ceramic engine at the same time, so naturally, under the condition of the same power output, the ceramic engine will naturally be more fuel-efficient. At the same time, the high temperature strength and thermal conductivity of the ceramic engine can prolong the service life and thermal efficiency of the engine.

Zhang Lan is really satisfied with the design of this ceramic engine, even if the actual load of the engine is added at that time, when the engine runs at the maximum safe speed of 17000 per minute, its maximum fuel consumption will not exceed four liters, and at this time, the power output of this engine with an exhaust of only 250 ml has reached an astonishing 55 horsepower, which can really be called a miracle!

Except for ceramic engines, Zhang Lan believes that no metal engine in this world can do this.

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