On the fourth day of the third month of the twenty-seventh year of Chongzhen, Li Zhi looked at the machine that Su Laosan was fiddling with, and was a little happy.

Su Laosan is the best steam engine craftsman in Fanjiazhuang, and Su Laosan was there to help when Li Zhi tried to make a steam engine. Later, Li Zhi made steam locomotives, and Su Laosan was the chief craftsman. Later, Li Zhi continued to improve the steam locomotive, and Su Laosan was the director of the locomotive factory. After these years of continuous research, Su Laosan has become a capable person in the field of steam engines.

Although the principle of the internal combustion engine and the steam engine are different, they have the same structure. Li Zhi tried to produce an internal combustion engine this time, but he still handed over the task to Su Laosan.

At first, Li Zhi heard that Su Laosan had made the internal combustion engine he designed, but he didn't believe it. After all, it has only been six months since the official use of electric machine tools, and the conditions for the manufacture of internal combustion engines are only just mature. As a brand-new product, the effect of the internal combustion engine will be revolutionary once it is successful.

But seeing the machine that Su Laosan placed on the table, Li Zhi felt that Su Laosan had indeed made great progress.

It was a rather large machine, far larger than the engine of a later car. Although Li Zhi was able to draw the structural diagram of the engine of later generations, the materials and processes of this era could not completely replicate the precision machinery of later generations. The actual machine is relatively large, with a length and width of more than one meter and a half, and the machine is covered with complex pipes.

Su Laosan said happily: "Lord Wang, this is the first internal combustion engine we have made. The design drawings you drew are very exquisite, but some parts cannot be made at our current level of craftsmanship. Therefore, we can only take the second best option, and use the soil method to achieve the function of each part on the design drawing as much as possible. ”

Su Laosan introduced: "However, on the whole, the whole machine is still in normal operation and can output rotational force to the outside world. ”

Li Zhi nodded.

Cao Yu, who was standing on the side, couldn't help but be curious and asked, "Lord Wang, what is the difference between this steam engine and the internal combustion engine?" ”

Su Laosan said: "Boss, the most fundamental difference between this steam engine and the internal combustion engine is that the steam engine burns fuel outside the engine to produce steam, and uses steam to drive the machine. The internal combustion engine, on the other hand, directly uses fuel to burn in the cylinder, and uses the pressure generated by the high-temperature expansion of the fuel after combustion to directly drive the machine. ”

Cao Yu nodded and said, "I understand, the steam engine burns coal, and the internal combustion engine burns gasoline." ”

Su Laosan said with a smile: "Boss, the steam engine is not all coal-burning. The steam engine used in our tanks burns gasoline. As long as the steam engine gets heat, it doesn't matter what fuel it burns. ”

Cao Yu thought for a while and asked, "So in that case, the internal combustion engine needs higher pressure?" ”

Su Laosan shook his head and said, "Boss, that's not either." Our steam engines are now also high-pressure steam engines, and the internal pressure is also very high. The internal combustion engine has just been developed, and the current pressure inside the cylinder is actually not as high as our mature steam engine. ”

Cao Yu was silent when he heard this, and didn't ask any more.

Li Zhi nodded and asked, "The overall structure of this internal combustion engine four-stroke hasn't changed, has it?" ”

Su Laosan said loudly: "There is no change. Rajah. ”

Cai Huaishui next to him looked at Li Zhi's face, but couldn't help asking, "Lord Wang, what is a four-stroke?" ”

Su Laosan said: "The so-called four-stroke means that the operation of the entire internal combustion engine is divided into four stages. The first is the intake stroke: the piston falls, sucking in a mixture of gasoline and air and injecting it into the cylinder through the intake valve. Then there is the compression stroke: a raised piston squeezes the cylinder inlet shut while compressing the mixture of fuel and air. Next is the ignition stroke: the mixture of fuel and air near the apex of the compression stroke is ignited by the spark plug, pushing the piston down. Finally, there is the exhaust stroke: the piston rises and discharges the burned exhaust gases through the exhaust valve to the cylinder. ”

Cao Yu immediately heard the key and asked, "Then how did the fuel that was sucked into the cylinder ignite?" ”

Su Laosan smiled: "We use spark plugs to ignite." When the internal combustion engine rotates, it drives a small magnetic coil inside the cylinder to generate electricity, and this current generates a voltage that increases enough at regular intervals to cross a small gap to form a spark point in the fuel in the cylinder. ”

Hearing Su Laosan's introduction, Cai Huaishui became more and more incomprehensible, and he was amazed and said, "This sounds very complicated. ”

Su Laosan said loudly: "It is indeed very complicated. With our current processing capacity, we can only barely process it. ”

Li Zhi couldn't help but nod when he heard Su Laosan's words. In fact, the four-stroke internal combustion engine was only invented in 1876 by the German scientist Nicholas Otto, which is considered a technology in the mid-to-late nineteenth century.

The last characteristic product of Fanjiazhuang's industrial level was the rear-loading rifle. The serial production of rear-loading rifles took the machine tool industry in Fanjiazhuang several years, reaching the level of the mid-nineteenth century. Nowadays, Fanjiazhuang's electric machine tools are constantly improving, and have reached the level of the mid-to-late nineteenth century.

Each step is getting harder and harder, but it's a great leap forward. You must know that the second half of the nineteenth century was the explosive phase of scientific inventions, and I don't know how many new machines, new facilities were created in this era by more powerful and sophisticated modern industry. Li Zhi's machine tools have reached this level, which means that Li Zhi can gradually replicate these great products.

Li Zhi nodded and said, "Okay!" Start the machine and show us! ”

Su Laosan said loudly: "Order!" Rajah! ”

He walked up to the rather large internal combustion engine and began to turn vigorously on one of the crank on the outside of the engine.

Before the internal combustion engine is started, there is no electricity on the spark plug, and the fuel cannot be ignited without electricity, which requires an external force to rotate the rocker to drive the internal combustion engine to start. When Li Zhi was a child, he saw that some old-fashioned trucks also had to shake the handle externally when they started, and this is the reason.

Su Laosan held back his strength, shook the handle faster and faster, and finally drove the machine.

The handle spun rapidly under the drive of the internal combustion engine, almost hitting Su Laosan's arm. Su Laosan pulled abruptly and pulled the handle off the internal combustion engine.

Black smoke began to emerge from the chimney of the internal combustion engine, and the whole machine made a roaring sound and was up and running.

One of the wheels on the top of the internal combustion engine is driven by the machine, tilting little by little, then turning faster and faster, and finally turning rapidly.

Seeing that the machine he made was successful, Su Laosan smiled and said, "Look, prince! ”

Li Zhi nodded and said appreciatively: "Good! Su Laosan, you have made meritorious service! ”

After thinking about it, Li Zhi said: "Your next task is to miniaturize this machine and put it on a car and tank!" ”

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