"What kind of engine are these?"

Professor Claire tapped the blackboard.

"What engine?"

Liu Lang looked at the blackboard.

"Well, this is an in-line engine, this is a V-engine, and this ......... It's a rotary engine!"

Without any thought at all, Liu Lang opened his mouth to answer.

"Well, this question is very simple for you, okay, then let me ask you, what are their opposing methods, what are the advantages and disadvantages, you can answer it!"

This question made everyone else frown, not because of how difficult the problem was, but because it was very difficult for Liu Lang, because they felt that China's technology was still far away from the engine, maybe the in-line engine and the V-type engine were not very difficult, after all, these two types of engines are very common, but the rotary engine is different, this kind of engine was not manufactured by the island country until more than ten years ago, although its output power is very strong, but the requirements for materials are very high, the relevant technology is not mature, even in the United States is full of controversy, even the Americans themselves are still researching, Liu Lang is afraid that he has just seen itAs for the advantages and disadvantages, I'm afraid I don't know very well.

However, the difficulty of this question is not too high, at least for Claire, it is really rare to come up with a question of this difficulty, at least he does not let you write all kinds of complicated formulas.

"Okay, let me answer Professor Claire's question, in-line engines are the most common, that is, all cylinders are lined up side by side in a plane, its block and crankshaft structure is simple, and the use of a cylinder head, low manufacturing cost, high stability, good low-speed torque characteristics, low fuel consumption, compact size, wide range of applications, its disadvantage is low power.

Adjacent cylinders are arranged at a certain angle, so that the two groups of cylinders form a plane with an angle, and the height and length size of the type engine are small, and it is more convenient to arrange on the automobile. It facilitates the increase in displacement and power by enlarging the cylinder diameter and is suitable for higher cylinder counts. At present, many of the domestic mid-to-high-end models use V-shaped 6-cylinder engines, such as Regal, Passat and Audi A6 and so on.

V-shaped engine, simply understood is to combine adjacent cylinders at a certain angle, from the side like a V-shape, V-shaped engine compared to the in-line engine, its height and length have been reduced, which can make the engine cover lower, meet the aerodynamic requirements, and at the same time can offset part of the vibration.

But the disadvantage is that two cylinder heads must be used, and the structure is relatively complex. Although the height of the engine has been reduced, its width has also been increased, making it difficult to install other devices in the engine compartment with fixed spaces. ”

Liu Lang first explained these two common engines.

"Yes, the answer is exactly right, but what about the rotary engine?"

Professor Clare then asked.

"The center of the triangular rotor revolves around the center of the output shaft at the same time, the triangular rotor itself rotates around its center, when the triangular rotor rotates, the inner ring gear centered on the center of the triangular rotor meshes with the gear centered on the center of the output shaft, the gear is fixed on the cylinder block and does not rotate, the triangular rotor rotates for one week, and the engine ignition does work three times.

Due to the above motion relationship, the speed of the output shaft is 3 times the rotation speed of the rotor, which is related to the 1:1 motion of the piston and crankshaft of the reciprocating engine.

Thanks to the axial motion characteristics of the rotary engine, it does not need precise crankshaft balance to achieve high speed, and the whole engine has only two rotating parts, compared with the general four-stroke engine, the structure is greatly simplified, and the probability of failure is also small.

However, the intake and exhaust temperature of the rotary engine is inconsistent, resulting in inconsistent thermal expansion and contraction on both sides of the cylinder block, and finally destroying the seal, more fuel-consuming, more importantly, the rotary engine is the ancestor of the real burning of engine oil, because its oil and fuel are poured into the cylinder through a device, in order to ensure the smooth operation of the rotor, each injection will inject oil, which is born with engine oil and gasoline burning, which is very serious to air pollution and also consumes oil. ”

"How do you know?"

After Liu Lang finished answering, Claire asked in surprise.

"Professor Clare, although our country has a very weak industrial base, it cannot stop us from yearning for the most advanced technology.

In fact, I haven't seen this kind of rotary engine, and my teachers at Huaxia University haven't seen it either, we only have a picture of this rotary engine, and we have analyzed a lot of problems based on this picture.

Liu Lang is right, he and Professor Xiong Huaizhi have never seen the actual rotary engine, only a photo given to him by a friend of Professor Xiong's island country, this kind of rotary engine has been applied to a car in the island country, that's all.

At the beginning, Professor Xiong built the rotary engine according to this picture, of course, the only thing made was the surface, but only relying on this model, Professor Xiong analyzed the advantages and disadvantages of this engine.

In fact, he also speculated, after all, there are no parameters in his hand, he can only rely on his material and rotor trajectory to infer that Liu Lang also discussed this engine with Professor Xiong at that time, in Professor Xiong's view, this engine output power is very strong, the structure is relatively simple, it seems to be a new type of engine with great potential, but because the rotor rotation will have an uneven impact on the inner wall of the cylinder, the time period may be fine, but the time is long, especially under the conditions of high temperature and high pressure, the requirements for materials are much greater than those required by ordinary engines, and the sealing is also more strict, if these two points are not solvedRotary engines are always a huge hidden danger.

Of course, these are all speculations of Professor Xiong, he also wants to engage in a rotary engine research, but there is no one in China, not even a car equipped with a rotary engine, Liu Lang also inquired, and finally found that the island country only has this kind of engine on the GTR sports car, this kind of car is naturally not sold in China, even if there is a sale, Liu Lang at that time could not afford it, after all, the price exceeded 700,000 yuan, and now it doesn't matter.

At this time, Claire was surprised by Liu Lang's answer, this answer is very close to the correct answer, could it be that China's mechanical level has reached this level? What did Liu Lang do when he came to the United States to study?

"That's all you learned in China?"

Claire finally voiced her doubts.

"Professor Claire, to tell you the truth, in our China, even the country's top Huaxia University and Capital University do not have any relevant information, my inference is that a professor named Xiong Huaizhi relied on a picture analysis, this professor used to study in Germany in the 40s, and then returned to China, contributing a huge ...... to our country's industrial base.

I can tell you with great confidence that my teacher has never been in contact with the world's advanced industrial technology since the 70s, and he cannot manufacture high-precision lathes or engines with superior performance.

But his ability is definitely no less than that of all of you here, if he had chosen to stay abroad in the forties, he would have already achieved fame and become the most famous scientist in the world, and he has contributed everything to the development of our country, such a person deserves my eternal respect!"

Liu Lang said what was in his heart, Professor Xiong is a teacher worthy of everyone's respect, and his ability and character are perfect in Liu Lang's eyes.

https:

Genius one second to remember the address of this site:. Mobile version reading URL: m.