Automotive Black Technology Chapter 707: : Damn it! Isn’t this the apocalypse in Red Alert?
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HC-SCR technology is not a new technology.
As early as 1957, the American Ange Company developed the predecessor of this technology, flue gas denitration, and used it in the boiler industry.
Although the historical course of automobiles has been changed, Europe's control of emissions standards has remained unchanged. As emission standards become increasingly stringent, European automobile manufacturers have applied this technology to diesel engines in order to meet emission requirements.
But although the technology is old, the way Li Fanyu applies it is new!
Conventional SCR technology is applied to diesel engines, which requires the use of air to compress urea and then inject it back into the cylinder. Although the atomization effect of this method is good, it requires a special compressed air system on the engine.
This results in a more complex engine structure and a higher cost. Moreover, the evaporation of water in the urea aqueous solution in the delivery pipeline will cause the urea to crystallize, which will block the nozzle and cause failure.
In this regard, Li Fanyu was inspired by the integration of the cooling pump on the B-01 into the transmission flywheel and designed an integrated SCR injection system that does not require an air compression system.
Although the atomization effect does not meet the standards of air compression systems, the structure is simple and does not increase the engine manufacturing cost much. Moreover, although the atomization effect is not very good, it avoids the problem of crystal precipitation of urea.
With this design, combustion efficiency is greatly improved and harmful emissions are reduced with almost no increase in cost.
With these designs, the performance and efficiency of the TS-L609 engine have been greatly improved.
After completion of the design and trial production testing, this inline 6-cylinder engine has a maximum horsepower of 430 horsepower, a rated rotation speed of 2200RPM, and a torque output of up to 1700NM at 1200-1600 rpm!
The displacement has been successfully controlled to less than 9 liters, and the emission standard has reached the Euro V standard!
In order to match this engine, Li Fanyu redesigned a transmission transmission system based on the hydraulic torque converter of the Longji transmission system.
Shifting the tractor in working condition requires uninterrupted power. This is the same as a tank, so this transmission system is completely a reduced version of the Dragon Backbone.
This transmission transmission system consists of three modules: hydraulic torque converter, power shift gearbox and electro-hydraulic control system. There was nothing much to say about the torque converter and electro-hydraulic control system at night. After passing Dragon's Back, Zhengshin was ready to play. But this power shift gearbox took Li Fanyu a lot of effort.
Taking into account the long-term performance and cost considerations, this gearbox cannot be made of the same X aluminum alloy material as Longji. Therefore, Li Fanyu could only simplify it structurally and strengthen the force structure.
This gearbox incorporates six clutches with wet friction plates, arranged in a six-in and three-out structure. Under this design, different gears are achieved through the combination of six clutches. Every time you shift gears, the transmission has two clutches working simultaneously.
In this way, the gearbox can realize upshift and downshift operations without interrupting power.
This transmission system, named "Reins" by Li Fanyu, together with TS-L609, constitutes the entire power system of the tractor.
The core parts are completed, and the rest is the body and operating system.
The tractor's hydraulic operating system is actually just that. The purpose of this thing is to be hung behind the tractor to mount and lift agricultural machinery and tools. It has basically no technical content at all, and you can currently find supporting equipment on the market. Specific to Zhengxin, it is nothing more than enlarging the hydraulic system to match the working requirements of heavy-duty tractors.
The body is another major factor that determines the durability and workmanship of a tractor.
Durability is easy to solve, and the problem of how much high-strength steel should be used when the large frame structure is reasonable. But performance needs to be considered.
Do tractors also need performance?
Yes, it does.
But the performance mentioned here has nothing to do with traditional car safety and strength performance.
All the performance of the tractor needs to be reflected during work.
The specific way of expression is in steering and driving.
When a tractor is working, it generally travels at a constant and low speed. This way of working may seem like it only requires that the thing be strong, moveable, and not fall off the chain.
But don’t forget, a tractor can do more than just a machine head. It also needs to pull large agricultural machinery, such as harvesters, green storage machines, balers, etc. to perform agricultural operations.
Depending on the different working methods, the tractor's steering, ground contact area and unit pressure exerted on the land all affect its performance.
For example, when you are working with a harvester and you are walking from one end of the field to the other, do you need to turn around?
But if the vehicle body is weak and the steering angle is too large, it will waste time and damage field crops.
What Zhengxin wants to build is a heavy-duty tractor, and this factor needs to be treated more intensively. After all, it is easy to make a large tractor, but the real skill is to make this tractor have high power while also taking into account the flexible operation.
After careful discussions with the team, Li Fanyu decided to use high-strength steel to build a solid body, and on the other hand, use a loader-style folding method to design the fuselage.
What is the bending method?
The body is divided into two parts and hinged together. It relies on the front wheels, front frames and working devices of the wheeled chassis to swing horizontally around the hinge pins of the front and rear frames to perform steering.
To put it bluntly, a bridge is like a pair of sticks with a bolt inserted in the middle. Paired with the hydraulic steering system of the flow amplification valve, the entire tractor can flexibly turn and turn around like a snake.
Using such a structure, this tractor, which Li Fanyu nicknamed "Iron Bull", has a smaller turning radius and is more maneuverable.
Don’t underestimate this design. With the attribute of “flexibility”, the “Tianniu” can operate in a relatively small space. Even some small farms can go in and work!
Just such a change will greatly enhance the scope of application of 001. Why not?
In order to further expand the scope of application, Li Fanyu directly abandoned the wheel drive design of the reason.
The "Iron Bull" is too huge, weighing more than ten tons. In order to prevent this big guy from crushing the farmland or even getting stuck in the wet ground, the R&D team originally wanted to use the side-by-side two-wheel method of mainstream foreign heavy-duty tractors.
That is, the original four tires are turned into a tire set formed by two wheels. Although this design increases the weight, it also increases the tire's ground contact area, can obtain greater friction and reduce the impact on the ground. unit pressure.
But when Li Fanyu saw it, it was already like this, why not be more straightforward!
So...
A bolder design was incorporated into the "Iron Bull".
That's it...
The four tires were replaced with four triangular track wheels!
These four triangular tracks were given a swing angle of up to 26 degrees by Li Fanyu, which can keep the weight of the tractor evenly distributed on the four tracks while crossing rough roads, and have greater adhesion to the ground.
The crawler chassis can swing 20 degrees in the vertical direction to ensure that it is in contact with the ground, greatly improving floatation and reducing soil compaction, and has excellent adhesion and shock absorption performance!
The grounding pressure under working conditions is lower, and the passability of operations in low wetlands is better!
What does this kind of performance mean?
It means that Tieniu can enter the fields where the spring snow has just melted earlier than other tractors for work, and relying on the large ground contact area of the four crawler tracks, the compaction of the land during operation is smaller!
With such a design, "Iron Bull" would dare to go there even if it is a swamp, let alone a depression or wetland!
All the above attributes combined together give "Iron Bull" an unparalleled visual appearance!
When the final design was completed, some game-loving engineers exclaimed in surprise, "Fuck!"
When Liu Qing, who came over for a visit, saw the final design, he was stunned: "Brother Fan, what are you doing? Isn't this the Apocalypse from Red Alert 3?"