Automotive Black Technology Chapter 676: : We haven’t completely failed yet!

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After half a month of hard work, a big guy about one and a half meters long, one meter wide and seventy centimeters high was built by the Zhengxin R&D team.

This is an engine body with twelve cylinders in a V-shaped arrangement, with a cylinder diameter of 148mm and a piston stroke of 140mm. Although it is a trial product, Zhengshin's sophisticated sand molds and fine turning techniques still make this big guy made of ordinary cast iron look very powerful.

This is the first experimental prototype that Li Fanyu built with the strength of the R&D team after referring to various sources, expanding his thinking on conventional diesel engines, and making repeated adjustments based on the power revolutions and torque values ​​given by the military. .

If nothing else, the fourth-generation tank engine will be based on this and will be continuously improved and finally formed.

The engine without anti-corrosion treatment exudes a faint luster under the incandescent lamp. Beneath the seemingly rough appearance, it embodies the delicacy that the R&D center has poured into it over the past half month.

Looking at this big guy, everyone's faces were a little happy and a little uneasy. This is the first time Zhengxin has built such a large engine. Although the database simulated the engine parameters, everyone was still unsure.

"Okay, don't waste time in daze. Get on the bench and test!" Li Fanyu waved his hand and pulled everyone out of their trance.

After hearing Li Fanyu's order, everyone immediately used a crane and forklift to move the engine to the engine laboratory on the first floor of the R&D center.

This guy is too heavy. Just the engine body alone weighs 1,200 kilograms. According to the requirements of the final assembly, the fourth-generation tank engine is equipped with three sets of cooling systems. Each cylinder is equipped with an independent water-cooling circulation system and lubrication system. In addition, in order to prevent vibration damage, a spare set of oil supply System...

Li Fanyu estimated that the engine must weigh two tons.

But that is a matter to be considered later. After there are no problems with the main body design, it is completely possible to use materials and processes to reduce the weight appropriately.

It’s too far to consider these now,

The engine was too heavy, and it took everyone more than half an hour to fix the engine on the bench and connect all the test instruments.

"Brother Fan, start?"

Wang Yu adjusted the test software, raised his head and asked.

Under the gaze of Department 7 and team engineers, Li Fanyu nodded gently, "Start when you're ready! Let's see the results of our hard work over the past half month!"

"Okay!" Wang Yu was ordered and pressed the start switch.

"Chuchuchu!!!"

With a muffled sound, the huge engine started running.

The bore is 148mm and the piston stroke is 140mm, which is more than three times larger than the size of TDI or D4D! Therefore, the sound when this engine is running is much duller and slower than the beep of TDI or D4D.

In two cylinders arranged in a V-shape at an angle of 90 degrees, the pistons, coordinated by the crankshaft, are like twelve flying sledgehammers, emitting an amazing vibration.

This huge vibration passed through the platform and was clearly transmitted to the ground.

The floor of the laboratory has been strengthened, and aluminum alloy plates were installed on the thick cement layer. But the huge vibration stirred up the dust on the aluminum alloy plate!

"Hiss!"

Li Fanyu took a breath.

The situation... doesn't seem right!

This shock is too great!

This is not the vibration that the engine should emit. It is almost the same as the vibration of a small stamping machine tool when it is working!

Not only did Li Fanyu see the problem, Wang Yu and the engineers at the end of the test bench all turned pale at this time.

Need a leash!

Just when everyone was frustrated, the vibration of the engine became stronger and stronger. In less than five minutes, the engine made a strange noise.

Li Fanyu recovered from his trance, quickly opened the maintenance specialization, and scanned the engine that was vibrating on the bench so much that it almost jumped.

Look at this!

His heart went cold!

"Stop! Turn off the fuel supply system!"

As he chanted, Wang Yu quickly cut off the fuel supply.

Diesel engines do not operate like gasoline by compressing the gas and then igniting it with a spark plug. Instead, the piston is used to directly compress the diesel fuel at high pressure, and then it is naturally detonated in the cylinder.

So after cutting off the fuel supply system, the engine stopped immediately.

After the vibration stopped, everyone immediately stepped forward to observe the status of the engine.

"Brother, cracks were visually detected on the second row of engine blocks!"

In order to ensure that his observation was accurate, the person who spoke stepped forward and touched it. But the moment he touched the engine, he heard the sound of "Zi!"

The fingers of his white-lined gloves instantly turned brown. Immediately, a burning smell came out.

"I'll wipe it! The temperature is so high?!" He quickly removed his hand from the engine block.

"Hey," Li Fanyu sighed, shook his head and said: "The design is unqualified, it can't help but be the second row of cylinders. The inside of the engine should be useless now. The cylinder head is about to be penetrated by the piston. If it was running again just now In two minutes, our house will be sprayed with diesel."

Wang Yu frowned, opened the cooling system on the stand, and pointed the nozzle at the engine.

The milky white coolant slowly sprayed on the engine, and under the influence of high temperature, bursts of white steam evaporated.

After a while, the temperature dropped. The people who had been waiting on the side quickly started to remove the engine cylinder head.

"Hold the grass! It's really about to break down! How could this happen?! Is it a problem with the size of the crankshaft? Damn it, I'm afraid if I didn't stop just now, the piston would fly out!"

Li Fanyu shook his head.

Just now, from the perspective of the maintenance expert, I saw that the twelve cylinders were all red and yellow - that means serious damage!

This test engine, codenamed A-01, was assembled by the team after repeated data verification and in the most rigorous way. It is impossible for such an accident to happen.

Even the prototype machine used for testing is made of the same cast iron used in the ZGX888 self-priming engine. Although it has not undergone anti-corrosion and anti-rust treatment, this prototype is also made in strict accordance with the process of mass production engines.

It only took less than ten minutes to run and it looked like this. It was definitely not due to a defect in the material.

Then there seems to be only one truth...

Yes,

Ma Dan’s design flaw!

Li Fanyu took a long breath. Although he felt very aggrieved, looking at a group of engineers who were looking at him eagerly, he smiled calmly and calmly.

"It doesn't matter, brothers, this is just the first test of the first prototype. Failure is the mother of success, don't be discouraged!"

In fact, if we follow the normal research and development process, such failures are as common as burping and farting. Which engine is not the result of hundreds or thousands of failures and always one more modification than the time of failure?

Zhengxin built this test machine in fifteen days, and it successfully ran for at least eight minutes. This is already a very good result.

In fact, the engineers all knew that the chance of success in this first test was so small that it was almost negligible.

It’s just that Zhengxin’s research and development has been almost done in one go with the support of Li Fanyu’s powerful data. Now faced with the shock of not being able to successfully run for ten minutes, everyone just couldn't accept it for a while.

"It doesn't matter, brothers, let's move! Collect the data just now and put it into the database for analysis. Disassemble the engine and find out the cause of the failure! Brothers, this is the engine of our fourth-generation main battle tank. This is Belongs to the heart of the Land White Tiger! This is also an arduous battle, a tough battle! But I believe that we will continue to improve ourselves and surpass ourselves until the day we are done, brothers! We haven’t completely failed yet!”

Listening to Li Fanyu’s sonorous encouragement, everyone’s eyes slowly became firmer. After shouting to encourage myself, I quickly threw myself into the summary work.

Li Fanyu looked at the people who cheered up and felt a little calmer.

But at this moment, his mind was shocked!

A mechanical and cold voice suddenly sounded in his mind;

"Tip: The current test user's R&D points have reached the upgrade standard."

Li Fanyu closed his eyes slightly, feeling the echo in his mind, and slowly raised the corners of his mouth.

Finally, it’s here!