Chapter 37 This answer is a bit strange
"Mr. Ji, your 4MT has really been finalized and you have started preparing to produce prototypes?"
Not waiting for Chen Qi and Lu Jianqiang to speak, the capital Cheng Tao, chief engineer of the Internal Combustion Engine Plant, couldn't wait to stand up.
He also brought several technical backbones to the meeting today.
In the upgrade and replacement of BJ212, the engine is definitely a component that attracts everyone’s attention.
Now that the gearbox, which is as important as the engine, has made a breakthrough, the pressure has suddenly fallen on the internal combustion engine assembly in the capital.
The key is that Cheng Tao still has no idea how to increase the power of the engine and reduce fuel consumption.
“I’ve even brought some of the drawings here, so what’s left of them?”
Ji Hua patted the briefcase placed aside and took out a stack of them directly from it. Drawings, face full of confidence.
When Capital Institute of Technology came to discuss cooperation, there were still some different opinions in the factory. After reading the drawings, he, the chief engineer, overcame all opinions and wanted to cooperate in depth with the other party.
I didn't expect that I would start to taste the sweetness so soon.
"Mr. Ji, you have started research and development of 4MT in advance. So, have you started research and development of 3AT or 4AT automatic transmission?"
At this time, Chen Qi finally couldn't help but intervene. A mouthful.
4MT is good, but if it has an automatic transmission, it will be even better.
However, Ji Hua has a different view on this.
"The MT gearbox is mainly composed of gears and shafts. It generates speed changes and torque through different gear combinations, and the power transmission is more direct."
"Automatic gearboxes, whether 3AT or 4AT, their transmission systems are composed of hydraulic It is composed of a force torque converter, a planetary gear and a hydraulic control system. "
"Speed change and torque change are achieved through the combination of hydraulic transmission and gears, and there is a certain power loss during the transmission process."
"Therefore, to obtain the same power as a manual transmission, you need to step on the accelerator more, which will lead to increased fuel consumption."
"And there is a certain delay in the automatic transmission shifting, and the shifting timing is changed by the TCU Controlled by the box control system, skilled drivers using manual transmission can better grasp the timing of shifting, thus helping to reduce fuel consumption.”
"Listening to the introduction just now, the First Machinery Department also has relatively high requirements for the reduction of fuel consumption of BJ212. I think 4MT is the most suitable choice at this stage."
Obviously the Capital Gear Factory does not have the ability to produce automatic transmissions But after listening to Ji Hua's explanation, everyone didn't have a bad impression at all.
“Compared with 3MT, 4MT has one more gear, which enables smoother operation when shifting gears, reducing the driver’s frustration.”
“At the same time, when driving at high speed, , 4MT can demonstrate higher fuel economy and produce less noise. "
"Compared with 3MT, 4MT can achieve a smaller reduction ratio, giving the gearbox a higher output speed. .”
“This means that under the same conditions, 4MT can provide faster speeds and reduce fuel consumption.”
“So I completely agree with Mr. Ji’s point of view that 4MT is the most suitable for use on BJ212 upgrade models. "
Cheng Tao was worried that Chen Qi would continue to struggle with the automatic gearbox, so he took the initiative to help Ji Hua share the firepower.
Let’s not talk about whether Capital Gear Factory can develop an automatic transmission. Simply using an automatic transmission will increase the fuel consumption of the vehicle. This is not a situation Cheng Tao wants to see.
Because these pressures will eventually fall on the Capital Internal Combustion Engine Plant, it will lead to higher requirements for reducing engine fuel consumption.
If the Capital Internal Combustion Engine Plant fails to complete its task by then, it will be embarrassed.
“From 3MT to 4MT, not only the fuel consumption level will be reduced, but the riding comfort will also be greatly improved.”
“As we all know, the more gears the transmission has, the The smaller the transmission ratio difference between adjacent gears, the smaller the engine speed will fluctuate when the driver shifts up and down. "In order to ensure a good ride, the driver generally needs to control the clutch when shifting gears, and the number of gears will be smaller." The smaller the change in engine speed, the smaller the change in engine inertia, and the corresponding clutch control becomes easier."
"Whether it is considered from the perspective of driving convenience. , both in terms of ride comfort experience are very beneficial.”
Jihua would not miss such a good opportunity to introduce (brag) its new generation gearbox.
The atmosphere of today’s meeting was quite serious and everyone was under great pressure.
Now that the Capital Gear Factory has taken the lead in making a breakthrough, everyone is willing to listen to Ji Hua's introduction.
Of the three major parts of the car, the gearbox, which was the most difficult to deal with, was first solved, which immediately brightened the prospects for the BJ212 upgrade project team.
“Let me take a look at the assembly diagram first.”
After hearing Ji Hua and Cheng Tao say so many good things about 4MT, Lu Jianqiang couldn't help but get up and come to Ji Hua's side. He reached out and picked up the drawing of the 4MT manual transmission and started reading it.
Although he is not a technician who specializes in gearboxes, as the director of the design department of a vehicle company, he is relatively clear about the basic structure of gearboxes.
Especially when the first generation BJ212 was produced, he personally participated in the production preparation of various parts.
He is also very familiar with the 3MT gearbox currently used.
“Director Lu, you can watch as you like.”
"This 4MT is an improvement on our original 3MT. It retains part of the gears, bearings and other parts of 3MT to the greatest extent. It is absolutely a perfect solution."
These drawings are from Ji Hua Bu Knowing how many times I have studied it, I feel confident.
Lu Qiangqiang did not refute Ji Hua's words. If this 4MT was really that good, then there would be no problem at all if he listened to Ji Hua's boasts.
If he could just listen to someone bragging that he could upgrade various parts, he would be willing to listen to the bragging from people in various supporting factories every day.
“Mr. Ji, when did you start designing this 4MT manual transmission?”
Lu Jianqiang quickly looked at the drawing information and found no obvious problems.
Just like Ji Hua said, although 4MT and 3MT are two completely different products, some of the parts inside have been retained to the greatest extent possible.
This can greatly reduce the production cost and preparation time of 4MT. It is definitely a very good choice.
"Strictly speaking, this 4MT was designed since 1976 and was finalized last month."
Ji Hua was silent for a few seconds and gave Lu a Qiang Qiang thought it was a bit strange answer.
Started designing in 1976?
I haven’t heard any news at all, which is a bit abnormal!
The gearboxes of Capital Gear Factory are mainly supplied to Capital Automobile Manufacturing Factory.
If they want to design a new gearbox, normally they must have some communication with customers.
How can anyone just get on with it without caring about anything?
Besides, even if you really don’t report it, it’s impossible for no news to come out in two years.
It’s not a special military secret project!
Does anyone have tickets? Support one piece
(End of this chapter)