"Mr. Liu, this is the supercharging layout of the No. 1 engine. Luhua's engine uses abandoned turbocharging technology. The No. 1 layout basically follows the method of Luhua. Of course, there are some small changes. The next step
We have to conduct tests, and if the tests pass, we can start small-scale trials on the 1st!”
A technician handed a bundle of information to Liu Lang. Liu Lang took off his goggles and protective clothing. A worker came over and took the protective clothing and goggles. Liu Lang took them.
The information handed over by the other party.,
"These are the indicators of Engine No. 1!"
The other party explained.
Luhua's engines use exhaust gas turbocharging technology, which uses the energy of exhaust gas to drive the turbine of the turbocharger and drive the pressure impeller on the intake end to compress the intake air, thereby obtaining a higher intake manifold pressure.
In this way, the engine can obtain higher density and greater flow of fresh air during the opening of the intake valve to increase engine output power and torque.
At the same time, the engine will be equipped with an intercooler in the pipeline after the outlet of the pressure end of the supercharger to reduce the temperature of the compressed air to further increase the air density, improve engine combustion, and reduce emissions and fuel consumption.
This kind of exhaust gas turbocharger can make it easier for the engine to obtain a power increase of 30% or more, and at the same time reduce the engine's maximum torque point speed to below 2000, and may even reach 1500. This makes the small displacement
The supercharged engine can easily achieve the performance of a larger displacement engine and meet the requirements of the entire vehicle.
Shenghe Company has made a comprehensive breakthrough in engine manufacturing. About 70% of the technology of Luhua Company's production line has been fully understood by the company. Of course, it is almost the millennium now. Three years have passed by in a flash. Shenghe Company has already
It is no longer what it used to be.,
"Old Sun, there is no problem with the indicator data, but the original Rover car is missing a small link, and that is a supercharger. After all, there are no plateau areas in the UK, but our country's terrain is much more complex, so a supercharger is essential.
"
By the way, I heard a slight nod.
"Mr. Liu, you are right. The use of a supercharger can compensate for the engine's power loss at plateaus. The air in plateau areas is thin and the atmospheric pressure is low. Therefore, the air intake of naturally aspirated engines is reduced, resulting in a decrease in power.
If an exhaust gas turbocharger is used, the situation is quite different. The exhaust gas turbocharger will open the exhaust valve when the exhaust gas is fully loaded at high speed at sea level, and the exhaust gas will be released without doing any work. However, a vehicle equipped with a supercharged engine will drive on a plateau.
When the engine is running, the engine will reduce or close the supercharger wastegate valve according to the situation to obtain a higher compression ratio, so that the absolute pressure of the engine intake manifold reaches a level similar to or slightly lower than when driving at sea level, reaching a power
The effect is not reduced or only slightly reduced.”
"Yes, this is what people often call "supercharger plateau compensation"."
Liu Lang responded.
“In fact, for supercharged engines, although due to pumping loss, the fuel consumption seems to be higher compared to engines of similar power, due to its good low-speed torque and matching the appropriate transmission ratio, the engine can operate close to the minimum in most operating conditions.
The fuel consumption zone can achieve a fuel saving effect of 10% to 20%, which is still very cost-effective, so we will conduct the test according to the No. 1 layout.”
Liu Lang explained again.
"Okay, these are all minor issues, but what about No. 2? I personally feel that supercharging has a huge advantage. The most obvious one is that from the transient response point of view, supercharging has unparalleled advantages over turbocharging.
This is a transient response diagram. It can be seen from the transient response diagram that in medium and low-speed overtaking conditions, the supercharger can build an absolute pressure of 90% within one second, while the turbocharger takes 5 seconds to reach the same pressure.
Pressure, this delay in boosting is enough to have a great impact on the driving feel and control of the entire vehicle.
The supercharger is a self-lubricating mechanical device that does not need to be connected to the engine's oil circuit. The supercharger does not produce extreme high temperatures and does not need to be connected to the engine cooling system to provide additional cooling.
.Therefore, superchargers have inherent reliability and durability advantages over turbochargers. In vehicle applications, it has also been proven that superchargers and engines have the same durability life. At the same time, superchargers
The system has fewer peripheral parts and lower cost.”
Shenghe Company's engine research and development not only imitated Luhua Company, but also found its own way on this basis. Turbocharging and supercharging were carried out at the same time. This required a lot of money to support, but Shenghe Company
The company is not short of money,
"Of course we have to continue research and development. Remember, our Shenghe Company will manufacture cars in the future and compete with companies like Volkswagen and BMW. How many models do they have? Cars, business cars, Jeeps, vans and even sports cars.
Yes, at least there need to be several different types of engines. We can't just put one type of engine on all models. Different types of cars need to be equipped with different types of engines."
Liu Lang said as he walked. He had already changed his clothes when he walked out of the workshop. As soon as he came out of the workshop, he was greeted by five people, led by Sun Hu.
"Brother Sun, are you back? Xiaohu has entered school?"
“Already living on campus, the environment is good!”
Sun Hu replied.
Sun Hu's son, Sun Xiaohu, went to college this year and was admitted to Hua Xia University's automotive engineering major. He studied this major because of Liu Lang's image. When Liu Lang was studying at Stanford, the room was filled with engineering drawings.
Sun Xiaohu also became interested in mechanical engineering.
"Okay! Let Xiaohu study hard and work in Shenghe Company after graduation!"
Liu Lang and Sun Xiaohu were playmates since childhood, so they were naturally very happy that the other could be admitted to Hua Xia University.
A person on the side said.
"Mr. Liu, Fucheng is famous for this year's college entrance examination. Huaxia University took the exam for ten people, and Capital University also took the exam for five. Good guy, these two universities recruited a total of 32 people in northern Liaoning Province. Fucheng took almost
Half the time, it’s all in the newspapers!”
"The main reason is that Fucheng has special classes, which is a benefit!"
Liu Lang smiled and waved his hand. Hong Yu also took the college entrance examination this year and scored 570 points. This score is 40 points higher than the national first-class score. It is very good, but there is still a big gap between Huaxia University. But because
He is a student with special talents and won the second place in the national computer competition for high school students. With this score, he was enough to be admitted to Huaxia University's computer major. Liu Lang was of course very happy.
"Mr. Liu, you can't say that. This specialty class is amazing. Several experts have been hired to teach. In the past few years, the national computer competitions have been won by kids like them. They are all talents!"
Another person said with a smile that he was from Fucheng, and of course he was happy when the school in Fucheng got good results in the college entrance examination.
"Even if you don't count the specialty classes, there are ten people who passed the exam in Fucheng. This result is enough to compare with Shencheng. There is no doubt that Fucheng's education level is the best in the province!"
"This is all Mr. Liu's credit. He spends 10 million yuan on education alone every year. If they can't achieve results, Mr. Liu's hard work will be in vain!"