In the past, everyone thought that diesel engines were not easy to study because they were not familiar with the characteristics of diesel.

It is only generally known that diesel has a lower spontaneous ignition point than gasoline, but it is not easy to ignite with an electric spark. And the liquidity is poor.

But I didn't expect that the diesel fuel would be compressed and ignited like this.

It's hard to say, it's easy to say.

In terms of technology, diesel engines are much lower than electronic lighter gasoline engines.

If the technology is simple, the cost of diesel engines will also drop significantly.

The people in the mobile courtyard suddenly felt that they were sure.

On the same day, the mobile courtyard was divided into two parts.

Part of the development of drawings and structures of agricultural machinery and machinery.

The other part was led by Ma Jianbin and began to develop compression ignition test diesel engines.

The Kyushu Academy of Sciences is settled. Li Zhen was very relieved to hand over to the mobile institute to do this.

The mobile institute is a group of people who have studied several generations of engines, have mature technology, and have experienced research and development. Some people even figured out the rotary engine, and the diesel engine is pediatric for them.

Let's be honest.

Even if there is no Li Zhen to mention and lecture.

Ma Jianbin and they studied it themselves, as long as they studied the characteristics of diesel fuel thoroughly, they would be able to study it themselves in two days. The development of diesel engines is not as difficult as they imagined.

Li Zhen let go of this matter.

After staying at the Kyushu Academy of Sciences for a week, there was good news from Ma Jianbin's side. Say that the first diesel engine has already been made.

The efficiency is really fast.

It took two days to design the drawings, but it only took five days to make them.

This efficiency is extremely fast. And the main reason is that they have too much experience in engine research and development. The diesel engine is just different from the gasoline engine, and the powertrain is actually similar to the gasoline engine.

Li Zhen was invited to the mobile institute to observe;

Many people are quite curious, and some can't imagine, why can ignition be completed by manpower?

I think it's complicated.

Actually, it's not complicated at all. It's just that they don't understand the characteristics of diesel. As soon as you talk about it, that's what it is.

The first diesel engine was quite a bit larger than expected.

Square head square brain.

It is about half a meter long and about forty centimeters wide.

Compared with the gasoline engine, this size is quite large. Gasoline engines plus batteries do not have such a volume.

Mainly because they designed a compression ignition system that was more complex. This is a matter of no choice, but the first generation of diesel engines, compression ignition system can not be simplified.

This square-headed guy has an oil pot hanging above it, and the oil pot contains diesel fuel, which will leak into the combustion system below.

On the side, there is a hole thicker than the thumb, in which there are several buckles. This hole is the ignition system of the diesel engine.

After Ma Jianbin introduced the function and principle of the diesel engine to everyone, he tried to poke a Z-shaped steel rod into the hole.

Everyone couldn't help frowning, did they really rely on manpower to ignite the fire?

What is the reason for this?

Although Ma Jianbin explained, most people did not understand it. In the clouds, I still feel in my heart that this can be ignited with a shake?

Is it heat generated by friction? That's too sloppy, isn't it?

Ma Jianbin didn't explain too much, he used all his strength, took a deep breath and suddenly began to shake the rocker.

"Hey!"

A low snort.

The joystick doesn't move.

Ma Jianbin couldn't help but freeze, and after a while, his face turned red.

After more than ten seconds, he was deflated.

Everyone looked stupid.

Is it so hard?

It doesn't work at all.

Ma Jianbin waved his hand: "Come and have a lot of strength." ”

A sturdy young man walked out of the mobile yard, spat into the palm of his hand, took a deep breath and grabbed the joystick and began to shake vigorously.

Holding his breath, he pushed the joystick around with all his might.

'Boom'

There was a muffled sound in the diesel engine.

And after one lap, with the support of inertia, the joystick becomes much easier.

The young man began to shake violently again. Blazing fast.

The diesel engine began to make a constant muffled sound.

'Boom, boom, boom; ’

Then a cloud of black smoke came out of the place of the exhaust hole.

Everyone's eyes widened, was it really smoking? Can this really be ignited by manpower?

The speed of the joystick is getting faster and faster, and the black smoke coming out of the diesel engine is getting louder and louder.

'Boom Boom'

At this time, the diesel engine made a starting sound. There seems to be a lot of power inside, constantly making a boom with a little 'bang' sound. And with the sound, it jumped and jumped.

The young man gasped tiredly, unloaded the joystick and stepped aside.

An operator stepped forward and pushed a push rod on the diesel engine that controlled the throttle.

'Buzz' diesel engine suddenly erupted into a roar.

Then the rotor attached to the diesel engine began to rotate. A lot of power.

No, it should be said that it has a lot of torque.

Everyone was dumbfounded.

Is that okay?

Why is that?

Liu Jinghong was also a person who had studied the steam engine at the beginning, and he was stupid when he saw this scene.

"What's the truth?"

"It's not scientific. Why is it possible to compress ignition by manpower? ”

"Is there something like flint and steel in it?"

Ma Jianbin explained: "No. It is because the air is compressed, and the air in the cylinder is compressed to a critical point. Under high pressure, diesel fuel spontaneously combusts. ”

"Is that okay?"

"Compressed air can ignite it?"

"It's unscientific."

"Regardless of how it works, it's not practical for you at all."

"Why isn't it practical?"

"It's really not practical. Although it doesn't need to be electronically ignited, it's too laborious, right? Who can ignite it with this ordinary person? ”

Ma Jianbin stiffened his neck and said, "Who said no? We made the joystick easier to push, using the lever principle, which is much easier. It's just that the joystick is not well designed. ”

Li Zhen also frowned and said, "You can't do this." ”

Ma Jianbin lowered his head and didn't explain. Li Zhen said no, he didn't dare to speak.

Li Zhen shook his head: "This compression ignition system is not well designed. Inside you have to redesign a more labor-saving one. Even if you change the joystick, ordinary people can't use it. It does take some force to push the diesel engine, but this force can't be too much. Otherwise, ordinary people can't start it, so they can only watch it, and how many things will have to be delayed. You can't just get a young guy every time you start up, right? ”

Ma Jianbin frowned: "However, this is the structure of it." The air inside is compressed, and that's atmospheric pressure. We've gone through the mechanics and we've reduced this to a minimum. ”

Li Zhen took the drawings and looked at them, hesitated for a moment and said, "I still have to change it." ”

"You can't do that."

"How do you change that?"