Rising: Ten Thousand Years Chapter 386: : Diesel engine

Whether it is a plow machine, a rice transplanter, or a harvester. In fact, the structure is simple.

Outsiders think that building these is a fantasy. ,

But for those who study physics, especially those who understand machinery, this is basically the simplest question. Don't even think about it.

But the most important issue is still the cost.

The machinery used for farming only needs three aspects: low cost, durable and maintenance-free, and powerful.

It is not difficult to solve the two problems of durable leather and powerful power.

But to solve the low cost, this is not a simple matter.

Since it is used for agricultural machinery, you must at least make it affordable for farmers, right? What's the point if it's more expensive than cattle rent? The biggest significance is to reduce the price of beef...

Li Zhen lives in the mobile hospital.

As a matter of fact, neither the School of Electromagnetics nor the School of Aviation can help in this matter.

There is a specialization in the art industry. In the manufacture of agricultural machinery, only the Machinery Institute can help.

Ma Jianbin said: "In terms of cost, the cost of a two-stroke engine is lower than that of a four-stroke engine. But the fuel consumption is too high."

A student agreed: "A four-stroke engine can reduce fuel consumption, but the cost of a four-stroke engine must be higher than the income of cultivated land. This is not possible."

"I want to solve this problem. It's not difficult."

Li Zhen raised his eyebrows: "Why is it not difficult?"

The student who said this said: "First of all, you need to know where the four-stroke engine is expensive. If you know this problem, you can solve the problem."

Ma Jianbin drew a few strokes on the paper and said: "For this four-stroke engine, the most valuable part is actually the cylinder technology. The cylinder is a precision component, and it is not acceptable to use a knife on the cylinder. Other exhaust facilities , the compressed air facilities can make some changes. But this electronic ignition system, to be honest, is expensive.”

Li Zhen looked at the drawings. He didn't know the cost of these things before.

Ask: "How much does a conventional four-stroke engine cost?"

"About one thousand five gold coupons."

Li Zhen was silent for a while: "What about the cost of the cylinder?"

"Cars generally use four cylinders, and the cost of one cylinder is more than two hundred. By the way, the number of cylinders can be reduced, and we can produce a two-cylinder engine."

"How much is the electronic ignition system?"

Ma Jianbin said sternly: "The cost and maintenance of this electronic ignition are quite expensive. With the current industrial technology of New Kyushu, the price of the electronic ignition system cannot be lowered. The battery needs a lot of money, and there are spark plugs. Then It is a more sophisticated system than the cylinder process. An electronic ignition system costs no less than 600. This is why steam cars are cheap and cars are expensive. Steam cars do not have these complicated processes. Although the power is not good, but Others love to use it.”

Li Zhen waved his hand: "Delete the ignition system."

"Ah? Delete the ignition system? Then what should I do? Wouldn't it become a waste?"

Li Zhen said in a deep voice: "Use a manual compression ignition system. The fuel is replaced with diesel. This solves the problem. The cost is reduced by half."

"Diesel?"

Everyone frowned.

I am no stranger to this fuel, because of the oil refining technology, there are a lot of refined things.

Everyone has tried diesel engines before. But because gasoline is more in line with the electronic ignition system, everyone put down diesel.

Everyone is well aware of the difference between gasoline and diesel. To be honest, diesel is cheaper than gasoline.

The cost of diesel gasoline is actually about the same. But the main reason is that diesel can produce more power and last longer, so in terms of energy saving, diesel is cheaper than gasoline.

The only downside is that when the diesel fuel burns, black smoke comes out. This is why everyone did not mainly study diesel engines.

However, any thing that exists has its value and reason. Finally got to use the diesel engine.

Ma Jianbin frowned and said: "Compression... To be honest, the Institute of Mechanical Engineering gave up this project before. Now it will take a lot of time to re-study. After all, the initial road is convenient and fast, so The original path was the electric spark system. Now I go back and start researching compression ignition from scratch, so I don’t know how much energy and experiments it will take.”

Li Zhen was silent for a while, and said: "The compression ignition engine is not difficult. You only need to master a few principles, and with your experience in building so many engines, you can get it right."

"Please remind Master Li."

Li Zhen pondered for a while, and began to recall some principles that Zhang Zhi had told himself before.

I used to think that the diesel engine might not come in handy, and the Motor Institute has been busy all the time, so I never said it.

Now that the **** is going to come in handy, he really has to think about it.

After pondering for a moment, Li Zhen said:

"First of all, the principle of this compression ignition engine must be applied to diesel. Because diesel has a low ignition point, it can be burned through compression."

Everyone nodded.

They know that the self-ignition point of diesel is low~IndoMTL.com~ But the same, the fluidity of diesel is too poor. Not as smooth as gasoline.

"This is actually not difficult. You only need to let the mixture of diesel and air be compressed by a powerful force to raise the temperature, and it can push the cylinder to work. The principle behind it is similar to the steam engine , when the cylinder is driven by the crank connecting rod, when it operates back, it will naturally complete another compression. At the beginning, it only needs to be compressed manually, and then it can be compressed automatically after operation.: "

"So in terms of principle, it's actually not difficult at all. Let me draw a picture.":

Speaking, Li Zhen went to the blackboard and drew a chapter with chalk to the more common diesel tractors of that era, mainly drawing the way of ignition with a rocker.

Seeing this joystick pose, Ma Jianbin and others suddenly realized.

Not difficult.

It's really not difficult.

Its principle is really too simple compared to the gasoline engine with electric ignition.

All of these are based on the characteristics of diesel.

The evaporation and fluidity of diesel are worse than that of gasoline, so a diesel engine cannot form a combustible mixed gas outside the cylinder like a gasoline engine, so that it can be burned with a spark plug. Spark plugs are something else.

However, the combustible mixture of the diesel engine can only be formed in the cylinder, and when it is close to the end of the compression stroke, the diesel is injected into the cylinder through the fuel injector. At this time, there is mainly hot air in the cylinder, and the small oil droplets of diesel oil are heated, evaporated, diffused in the hot air in the cylinder, and mixed with air to form a combustible mixture, and finally spontaneously ignite and burn.

The key point is actually the joystick.

The rocker is shaken manually to drive the internal machinery to generate mechanical supercharging. This solves the problem perfectly.

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