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"Boss, this direct injection technique in the cylinder seems to be very difficult!"

A few days later, Liang Qiming came to Li Yifan's office again and started to complain to Li Yifan as soon as he came in.

Although Li Yifan doesn't often appear in the factory, as the company's big boss, of course, the company has prepared a large office for him in the factory.

"Oh? But that's right. If this technology is not difficult, Volkswagen wouldn't have taken three years to overcome this problem."

Li Yifan said to Lao Liang with a smile. As he spoke, he wrinkled his nose and asked about a very strong smell of motor oil from Lao Liang.

Looking at Lao Liang, I was quite clean two days ago. Now I look like my whole body is covered in oil and my hair is covered with oil. I don’t know how many days I haven’t washed my hair.

He was also black and dressed in a blue work suit. He couldn't tell that he was the boss of Chenhua Automobile's power department. Lao Liang also felt a little embarrassed. He rubbed his black hands and said.

"Hehe, I just dismantled several diesel engines and analyzed the characteristics of direct injection in the diesel cylinder. I didn't know that after doing this, I realized that the technical difficulties are really great."

"Well, what do you think, otherwise I would have such a meeting and would have such a big fire?"

Li Yifan said with a smile. He liked Lao Liang's diligent work attitude very much, and Lao Liang nodded.

"Well, that's why I'm organic, I've got a few Mitsubishi diesel engines through some channels. I also got a few diesel engines from Europe. Although Volkswagen's golf has been released, it has not yet been sold in China. I can only ask someone to sell them in Europe. After their machines arrive, we can find out the differences between the injection of those diesel engines and their gasoline engines. However, the high-pressure common rail line of the diesel engine, as well as other high-pressure nozzles and pressure pumps, I think we have some."

"Well. In fact, in my opinion, the direct injection technology of this gasoline engine is only these difficulties. One is the nozzle and the other is the pressure pump, but the most difficult thing is the control and coordination of the ecu. You must know that it is possible to accurately control and burn fuel injection in a few milliseconds. This is the essence of this technology."

Li Yifan told Lao Liang about his understanding of the direct injection technology in the cylinder. Lao Liang nodded frequently, and couldn't help but look at Li Yifan a few more.

Although this little boss is not a professional skill, he has made every sentence of the point.

This can be seen from his summary and summary of the direct injection technology in the cylinder. He has indeed had a very profound research on this technology.

Otherwise, many domestic engineers have just heard of this technology, but they can't tell what's going on.

In fact, this is also the details that Li Yifan often stayed on the Chetuo Home website and often followed those technical articles to know.

This direct injection technology in the cylinder is first mentioned in hardware. The most important thing is the nozzle and pressure pump. Only with these two things can you spray the fuel into the cylinder after the most accurate atomization of fuel, so as to achieve the purpose of accurately burning every drop of fuel.

This requires a very powerful pressure pump that can provide very high pressure and then squeeze the fuel through very small injection holes.

In fact, in this regard, the best one is the eco wave OST engine developed by Ford later. Their high-pressure fuel supply system can actually be done even better than Volkswagen.

The fuel injected by their pressurized pumps can be thinner than hair, which makes people admire the Americans' deep industrial foundation.

You should know that before 2008, Ford, like many American car companies, did not pay attention to the research, development and manufacturing of small-displacement engines. Their main energy was concentrated on the large-displacement v6 or v8 engines that Americans liked.

Later, after the economic crisis in 2008, Ford almost reached the point of forcing it backwards, but eventually became the only one among the three American auto giants.

In order to get out of the quagmire as soon as possible, they took the lead in abandoning the diversification strategy, abandoning many sub-brands, and began to return to the Ford route.

During the process of returning, they were also one of the three American car companies that started the research and development of small-displacement and high-power engines.

In just two years, it launched a new generation of main engines, eco-wave OST series, and this engine did not disappoint Ford. Several of the models have been selected as the top ten engines in the world for several consecutive years.

Their eco wave OST engine perfectly reflects the development direction of the engine in the new era, which is the requirement of small displacement and high power.

Their 2.0l eco-wave OST engine can even achieve a power output of 240 horsepower, and the high torque version can be adjusted to more than 300, and in terms of fuel saving, it can save 15% compared to before.

Such motivation and fuel-saving performance once made the direct competitor Volkswagen he faced felt very stressed.

If Ford hadn't been not very mature in interior workmanship, it would have been impossible to overturn Volkswagen.

Li Yifan told Lao Liang about the principles of Ford's pressure pump and high-pressure common rail system. After hearing this, Lao Liang felt that he benefited a lot.

More than a decade later, Ford's engine has become quite popular, and their technology is no secret to Li Yifan now.

Later, a friend bought a Ford car. Later, when he went to repair and maintenance, he also accompanied him to the mechanic factory, so he was quite familiar with the design of Ford's pressure pump.

At this time, when I said this to Lao Liang, Lao Liang immediately had a general idea.

"Mr. Li, after hearing what you said, I want to go back and try it."

Lao Liang was a little impatient to go back and try to build such a pressure pump first. In fact, manufacturing the pressure pump is not very difficult at present.

However, the difficulty of this thing lies in the later disassembly selection and finishing, which has always been the biggest problem that plagues domestic pressure pump manufacturing companies.

But now these problems are not a problem for Li Yifan, who has special metal smelting companies, finishing system machine tools, and his Chenhua Automobile.

So Lao Liang is very confident that he can manufacture such a pressure pump.

However, Li Yifan still called him because he felt that he needed to say something to Lao Liang.

That's about the design of the fuel injector. Many people may think there is something to say about this fuel injector. Isn't it just such a nozzle?

Isn’t it enough to make a spray head and then tick a few eyes?

In fact, it is not the case that the nozzles for direct injection in the cylinder are also very particular about the arrangement of the spray holes. Almost most of the automobile manufacturers in later generations can master the direct injection technology in the cylinder.

But there is only one that truly brings this technology to its limit, and that is Mazda!

It is Mazda's design of this fuel nozzle that has greatly improved the direct injection technology in the cylinder.

Even later, many car companies began to use Mazda's design to change the nozzle hole design.

The design principle of Mazda is to arrange six plum blossom-shaped arrangements on the spray hole nozzle, so that the nozzle's spray efficiency can be greatly improved on a large scale and there will be no repeated spraying.

More importantly, Mazda made the nozzle hole a little thicker. The purpose of this design is to allow this nozzle to adapt to fuel of worse quality.

You should know that the nozzle with direct injection technology used by Mazda's later newly launched Chuangchi Blue Sky Technology was known as the most adaptable nozzle in the world at that time.

This nozzle can be adapted to the fuel of the 85th local United States in the United States, which is equivalent to the gasoline of the 90th domestically.

Everyone knows the domestic gasoline refining level. The technical level is equivalent to adding water to you. It is better to have more than 10,000 kilometers. If you have to clean the throttle once, it already shows the quality level of domestic gasoline.

Why did Volkswagen later castrate the layered combustion technology they used in foreign models?

Nothing for anything else, it is because the domestic fuel quality is not good, so they have to remove this technology.

After Li Yifan said his thoughts to Lao Liang, Lao Liang slapped his thigh happily.

"Okay! I was a little worried before. I also read a lot of articles on Volkswagen's private engines. I saw people saying that their direct injection technology in the cylinder has high requirements for fuel quality. After all, if the fuel quality of the nozzle is too low, it will easily be blocked. But Mr. Li said this, but we have provided us with a new idea. After all, with our current technical level, it is still difficult to achieve the precision of Bosch. I looked at it and even the nozzles used on the diesel engine are made very fine. If it is used on the gasoline engine, I was still thinking about how thin it must be made? With our technical capabilities, it will definitely not be achieved. But when you say this, I have ignored the quality of our domestic fuel. In this way, we don't have to be afraid even if we can't reach the Bosch level, haha."

What Li Yifan said accidentally was to help Lao Liang get rid of a piece of his heart. Li Yifan was also very happy to see his happy appearance.
Chapter completed!