In the past, people thought it was difficult to study diesel engines because they were not familiar with the characteristics of diesel engines.
It is only generally known that diesel has a lower auto-ignition point than gasoline, but it is not easy to ignite with an electric spark. And liquidity is poor.
But I didn't expect diesel to be compression ignited in this way.
It's hard to say, but it's easy to say.
In terms of technology, diesel engines are far inferior to electronic ignition gasoline engines.
As the technology becomes rudimentary, the cost of diesel engines will also drop significantly.
The people at the Automobile Institute suddenly felt confident.
On the same day, the mobile hospital was divided into two parts.
Part of them began to develop drawings and structures of agricultural machinery.
The other part, led by Ma Jianbin, began to develop compression ignition test diesel engines.
Things at the Kyushu Academy of Sciences have been settled. Li Zhen was relieved to leave it to the Automobile Yuan to do this.
The Automobile Research Institute is a group of people who have developed several generations of engines, have mature technology, and experienced research and development experience. Some people have even figured out the rotary engine, and diesel engines are child's play for them.
To be honest.
Even without Li Zhen’s suggestions and lectures.
Ma Jianbin and others will do their own research. As long as they thoroughly study the characteristics of diesel, they can figure it out in two days. Developing diesel engines is not as difficult as they imagined.
Li Zhen let go of this matter.
After spending a week at the Kyushu Academy of Sciences, good news came from Ma Jianbin. It is said that the first diesel engine has been made.
The efficiency is really fast.
It took us two days to design the drawings, but it only took five days to make it.
This efficiency is extremely fast. The main reason is that they have too much experience in engine research and development. Diesel engines only have different ignition methods from gasoline engines, but the powertrain is actually similar to gasoline engines.
Li Zhen was invited to the Motor Vehicle Institute to observe;
Many people are quite curious, and some cannot imagine why ignition can be completed through human power
I feel like this is very complicated.
It's not complicated at all. It’s just that they don’t understand the characteristics of diesel. To put it bluntly, it's just the same thing.
The first diesel engine was much larger than imagined.
Square head and square brain.
About half a meter long and about forty centimeters wide.
Compared with a gasoline engine, this size is quite large. Neither the gasoline engine nor the battery has such a size.
Mainly because the compression ignition system they designed is relatively complex. There is no way around this. It’s just the first-generation diesel engine, and the compression ignition system cannot be simplified.
This guy with a square head and square brain has an oil can hanging above him. The oil can is filled with diesel oil, which will drip into the combustion system below.
On the side, there is a hole thicker than a thumb, with several buckles in it. This hole is the ignition system of the diesel engine.
After Ma Jianbin introduced the functions and principles of the diesel engine to everyone, he tried to poke a Z-shaped steel rod into the hole.
Everyone couldn't help but frown. Is it really relying on human power to light the fire
What is the reason for this
Although Ma Jianbin explained it, most people didn't understand it. In the mist, I still wonder how can this be ignited by just shaking it
Is it heating through friction? Isn't this too hasty
Ma Jianbin didn't explain too much. He used all his strength, took a deep breath and suddenly started to shake the rocker.
"Hi!"
A low drink.
The rocker didn't move at all.
Ma Jianbin couldn't help but froze, and after a moment, his face turned red.
After more than ten seconds, he was discouraged.
Everyone was dumbfounded.
Is it so difficult
This can't be done at all.
Ma Jianbin waved his hand: "Let's get someone strong."
A strong young man walked out of the motor court, spit into the palm of his hand, took a deep breath, grabbed the joystick and started shaking it vigorously.
Holding a breath, he pushed the joystick in a circle.
'boom'
There was a muffled sound in the diesel engine.
After one lap, with the support of inertia, the rocker became much easier.
The young man began to shake violently again. Extremely fast.
The diesel engine began to make a constant muffled sound.
'Boom boom boom;'
Then a cloud of black smoke came out of the exhaust hole.
Everyone's eyes widened, was there really smoke? Is it really possible to set it on fire with human power
The speed of the rocker is getting faster and faster, the black smoke from the diesel engine is getting louder and louder, and the sound is getting louder and louder.
'Boom boom boom'
At this time, the diesel engine made a starting sound. There seems to be a lot of power inside, and it keeps rumbling with a little 'bang' sound. And with the sound, it jumped again and again.
The young man took a few breaths tiredly, removed the joystick and stepped aside.
An operator stepped forward and pushed a pushrod that controlled the throttle on the diesel engine.
'Buzz buzz' The diesel engine roared suddenly.
Then the rotor connected 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 this okay
Why is this
Liu Jinghong was also someone who had studied steam engines. He was dumbfounded when he saw this scene.
"What's the point of this?"
"It's unscientific. Why can it be compressed and ignited through human power?"
"Are there flints or something like that in it?"
Ma Jianbin explained: "No. It's because the air is compressed and the air in the cylinder is compressed to a critical point. Under high pressure, diesel spontaneously ignites."
"Is this okay?"
"Compressed air can set it on fire?"
"This is so unscientific."
"Regardless of what the principle is, it's not practical at all."
"Why isn't it practical?"
"It's really not practical. Although there is no need for electronic ignition, it is too laborious, right? Who can this ordinary person ignite?"
Ma Jianbin scratched his head and said: "Who says it can't be done? Let's design the rocker to be easier to push and use the lever principle, which will make it much easier. It's just that the rocker is not designed well."
Li Zhen also frowned and said, "You can't do this."
Ma Jianbin lowered his head and did not explain. Li Zhen said no, he didn't dare to speak.
Li Zhen shook his head: "This compression ignition system is not designed well. You have to redesign a more labor-saving one inside. Even if you change the rocker, ordinary people will not be able to use it. It does take some strength to push the diesel engine, but this strength can't It’s too big. Otherwise, ordinary people can’t start it and can only watch it, which will delay a lot of things. You can’t have to find a young guy every time you start it, right?”
Ma Jianbin frowned: "But this is the structure. It needs to compress air inside, which is atmospheric pressure. We have passed the mechanical principle and have reduced this to a minimum."
Li Zhen took the drawing and looked at it, hesitated for a moment and said, "It still needs to be changed."
"You can't do this."
"Then how to change it?"
(End of chapter)