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

A few days later, Liang Qiming came to Li Yifan's office again, and as soon as he came in, he began to pour bitter water with Li Yifan.

Although Li Yifan usually does not appear in the factory, as the big boss of the company, the company of course has prepared a large office for him in the factory.

"Oh? But that's a matter of course, and if the technology wasn't too difficult, Volkswagen wouldn't have taken three years to overcome it. ”

Li Yifan said to Lao Liang with a smile, he wrinkled his nose as he spoke, and from Lao Liang's body, he asked a very strong smell of engine oil.

Looking at Lao Liang, a person who was quite clean two days ago, now looks oily all over his body, his hair is oily, and he doesn't know how many days he hasn't washed his hair.

And the body is also black, dressed in blue overalls, I can't tell that this is the appearance of the boss of the power department of Chenhua Automobile, Lao Liang also felt a little embarrassed, he rubbed his black oily hands, and then said.

"Hehe, I just dismantled a few diesel engines, and I came to analyze the characteristics of direct injection in the diesel cylinder.

"Well, what do you think, otherwise I would have had such a meeting and would have been so angry?"

Li Yifan said with a smile, he liked Lao Liang's diligent work attitude, and Lao Liang also nodded.

"Hmm. That's just the organic me through some channels. I got a few Mitsubishi diesel engines. They also got a few diesel engines from Europe, but although Volkswagen's Golf was released, it has not yet been sold in China, so it can only be sold in Europe, and they have to wait for their machines to arrive to find out the difference between the injection of those diesel engines and their gasoline engines. However, just the high-pressure common rail line of this diesel engine, as well as other people's high-pressure nozzles, and pressure pumps, I think we have them. ”

"Hmm. In fact, the direct injection technology of this gasoline engine, in my opinion, is only these few difficulties. One is the nozzle and the other is the pressure pump, but the most difficult thing is the control of the ECU. The ability to accurately control fuel injection and burn in a fraction of a millisecond is the essence of this technology. ”

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

Don't look at this little boss who is not a professional in technology. But these few words of people are to the point.

This can be seen just from his summary and generalization of the direct injection technology in the cylinder. People do have a very deep research on this technology.

Otherwise, many engineers in China now have just heard about this technology, but they can't say anything about it.

In fact, this is also the details that Li Yifan often soaked in the website of the car trust home in later generations, and often paid attention to those technical articles.

The most important thing in this in-cylinder direct injection technology is the nozzle and the pressure pump, because with these two things, you can achieve the most accurate atomization of fuel and inject it into the cylinder, so as to achieve the purpose of making every drop of fuel burn accurately.

This requires a very powerful pressure pump that can provide a very high amount of pressure and then squeeze the fuel through a very fine injection hole.

IN FACT, IN THIS REGARD, THE BEST THING TO DO IS FORD'S LATER DEVELOPMENT OF THE ECOBOOST ENGINE, THEIR HIGH-PRESSURE FUEL SUPPLY SYSTEM, IN FACT, CAN DO EVEN BETTER THAN THE PUBLIC.

Their pressurized pumps can inject fuel thinner than a human hair, which makes people admire the deep industrial base of the Americans.

You must know that before 2008, Ford, like many American car companies, did not pay attention to the development and manufacturing of small-displacement engines, and their main efforts were focused on the large-displacement V6 or V8 engines that Americans liked.

Later, after the economic crisis of 2008, Ford almost went backwards, but in the end it became the only one of the three American auto giants to stop.

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 a Ford route.

In the process of returning, they are also one of the three American car companies to take the lead in the development of small-displacement and high-power engines.

And it only took two years to launch a new generation of the main engine. ECOBOOST SERIES, AND THIS ENGINE DID NOT DISAPPOINT FORD, SEVERAL OF WHICH HAVE BEEN SELECTED AS THE WORLD'S TOP TEN ENGINES FOR SEVERAL YEARS IN A ROW.

Their ECOBOOST engine perfectly reflects the development direction of engines in the new era, that is, the requirements of small displacement and high power.

THEIR 2.0L ECOBOOST ENGINE CAN EVEN ACHIEVE A POWER OUTPUT OF 240 HORSEPOWER, AND THE HIGH-TORQUE PUBLIC VERSION CAN BE ADJUSTED TO MORE THAN 300 PERCENT, AND IT CAN SAVE 15% OF FUEL SAVING COMPARED TO BEFORE.

Such power and fuel-efficient performance once made his direct competitor Volkswagen feel very pressured.

If it weren't for the fact that Ford was still not very mature in interior workmanship, it is estimated that it would not be impossible to overturn Volkswagen.

And Li Yifan explained the principle of Ford's pressure pump and high-pressure common rail system to Lao Liang, and after listening to it, Lao Liang felt that he had benefited a lot.

More than ten years later, Ford's engine is already quite popular, and their technology is no secret to Li Yifan now.

Later, a friend bought a Ford car, and later when he went to repair and maintain, he also accompanied him to the machine shop, so he still knows a lot about the design of Ford's pressure pump.

At this time, Lao Liang said this, and Lao Liang immediately had a general idea.

"Mr. Li, hearing you say this, I want to go back and try."

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

However, the difficulty of this thing is difficult in the later dismantling selection and finishing, which has always been the biggest problem plaguing domestic pressure pump manufacturing enterprises.

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

Therefore, Lao Liang is very confident that he can make such a pressure pump.

However, Li Yifan still stopped him, because there was another point where he felt that he needed to talk to Lao Liang.

That's about the design of the fuel injector, many people may think that there is something to say about this fuel injector, isn't it just such a nozzle?

Wouldn't it be enough to make a sprinkler and prick a few eyes?

In fact, the nozzle for direct injection in the cylinder is also very particular about the arrangement of the nozzle, and almost half of the automobile manufacturing enterprises in later generations can master the direct injection technology in the cylinder.

But there is only one company that really pushes this technology to the limit, and that is Mazda!

It is also Mazda's design of this fuel nozzle that has made the in-cylinder direct injection technology a great improvement.

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

Mazda's design principle is to arrange the nozzles in the shape of six plum blossoms, so that the injection efficiency of the nozzles can be greatly improved, and there will be no repeated spraying.

More importantly, Mazda has made the nozzle a little thicker, so that the purpose of this nozzle is to make this nozzle suitable for more harsh quality fuels.

You must know that the nozzle of direct injection technology used by Mazda in the new Skyactiv technology was known as the most adaptable nozzle in the world at that time.

This nozzle can adapt to the local No. 85 fuel in the United States, which is equivalent to the domestic No. 90 gasoline.

Everyone knows the level of domestic gasoline refining, and the technical level is not to mention that it is equivalent to mixing water into it, but more than 10,000 kilometers, it is necessary to clean the throttle, which has already explained the quality level of domestic gasoline.

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

Not for anything else, it's because the quality of domestic fuel is not good, so they had to remove this technology.

And after Li Yifan told Lao Liang about his thoughts, Lao Liang slapped his thigh happily.

"Good! I used to be a little worried, I also read a lot of Volkswagen TSI engine articles, and saw that people said that their in-cylinder direct injection technology has high requirements for the quality of fuel, after all, if the nozzle hole is too low in fuel quality, it is easy to be blocked. But Mr. Li, you say this, but it provides us with a new idea, after all, with our current technical level, if you want to achieve the same precision as Bosch, it is still very difficult, I looked, they even use the nozzle hole on the diesel engine is very fine, if it is used on the gasoline engine, I am still wondering, how fine does this have to be? With our technical capabilities, we will definitely not be able to reach it, but when you say so, boss, I ignore the quality of our domestic fuel, so that we don't have to be afraid even if we can't reach the level of Bosch, haha. ”

What Li Yifan said inadvertently helped Lao Liang get rid of a piece of his heart, and Li Yifan was also very happy to see his happy appearance.

In the next few days, Li Yifan's main energy was not so much on the power research and development department, but on another important department, that is, the transmission department. (To be continued......)