The car giant started by marrying the daughter of the king

Chapter 59 4MT Expert Review and Acceptance Meeting

As for the capital's weather, once September comes, the hot summer slowly passes.

Especially in the morning and evening, the weather is not so hot.

Even if the sun is already high in the sky after seven o'clock, you won't sweat profusely while riding a bicycle.

Jiang Hui skillfully parked the Phoenix brand 18-type bicycle in the bicycle shed and headed towards the second canteen.

I greeted some familiar faces from time to time on the way, and then comfortably drank a bowl of millet porridge, a fried dough stick and two cabbage buns with lard in the cafeteria.

Today is the day of the Capital Gear Factory's 4MT manual transmission expert review meeting.

They successfully produced the first batch of prototypes last week. After preliminary verification, the performance in all aspects is very good.

Therefore, Chief Engineer Ji Hua could not wait to report to the First Ministry of Machine Building so that the news could spread quickly within the system.

Of course, new technological breakthroughs in this era are not achieved just because the manufacturers say they have made them.

Instead, it is necessary to invite experts to carry out special review and acceptance. Only when this link is completed can it be considered a real technological breakthrough.

Today's expert group members include technical experts from the Ministry of Machine Building, as well as professors from Huaqing University and Capital University of Technology.

Even FAW and Second FAW specially arranged personnel to attend the review meeting.

After all, if the 4MT manual transmission is really successfully developed, it will not only be used by the Capital Automobile Manufacturing Plant, but also by FAW and Second FAW.

As the designer of the 4MT manual transmission, Jiang Hui naturally cannot be late today.

Fortunately, the Capital Gear Factory is right next to the Capital Automobile Manufacturing Plant. After breakfast, I went to the office to pack up my things and rode my bike over. I arrived at the designated meeting room before nine o'clock.

The experts were waiting in a special lounge, and the staff from the Capital Gear Factory were setting up the scene in the conference room.

Chief Engineer Ji Hua had arrived at the conference room in advance. Zhu Jiansheng and several teachers and students from Capital Institute of Technology, as project participants, were also in the conference room.

Another person who participated in this event as a judge was the director of the Department of Vehicle Engineering.

This vote is basically a sure thing.

"Jiang Lianluo, everyone is looking forward to the 4MT manual transmission you designed."

"As long as it passes this review, it can start selling to various domestic customers such as FAW and Second FAW, and the volume will increase soon."

"When the time comes, you, as a designer, will definitely be the biggest contributor."

Ji Hua is in a very good mood now.

Although the 4MT was not designed by the Capital Automobile Gear Factory, as the first factory to put it into production in the country, they can reap considerable benefits.

In particular, when Jiang Hui designed this gearbox, all the support points of the gearbox were kept consistent with the previous 3MT to the greatest extent possible.

In this way, other models can be changed from 3MT to 4MT without making too many improvements.

Even the BJ212 currently being produced by the Capital Automobile Manufacturing Plant can be installed on the vehicle for use simply by changing the shape of a few brackets.

Although it is just an updated gearbox, the overall performance is unlikely to have a significant improvement.

However, you can also enjoy some of the benefits of improved handling and reduced fuel consumption.

The future of the 4MT manual transmission is bright. “No matter how well we design the 4MT on paper, the final specifications can only be determined after the factory conducts trial production.”

"Your Capital Gear Factory is very experienced, and you must have put in a lot of effort this time to be able to produce 4MT so quickly."

Jiang Hui's words were not just a compliment. The Capital Gear Factory had indeed made a significant contribution.

"When the experts review it later, the first stage will be for you to help explain the structure and design principles of 4MT. However, we have already given this information to the experts for confirmation in advance, so it shouldn't be a problem."

Seeing that the review meeting was about to begin, Ji Hua gave Jiang Hui a brief explanation.

Jiang Hui also listened carefully to this.

This is the first result of production, so we can’t be careless.

"This 4MT manual transmission is a two-shaft manual transmission, which is characterized by the output shaft being parallel to the input shaft and having no intermediate shaft. The power of the engine is transmitted to the speed input shaft through the clutch, and then output to the final reducer through the output shaft after the gear shift."

"This gearbox has only one pair of gears from the input shaft to the output shaft, and only one intermediate gear in the reverse gear transmission route, so it has high mechanical efficiency and low noise."

"It is very suitable for front-engine, front-wheel drive or rear-engine, rear-wheel drive cars and minivans and light trucks."

Although Jiang Hui is young, he is not stage-frightened at all.

After briefly greeting each judge, he began his introduction.

"Compared to the previous 3MT, this gearbox has one more gear and has also made great improvements in the synchronizer."

"As we all know, during the gear shifting process, the peripheral speeds of the gear teeth of the gears to be meshed must be equal in order to smoothly mesh and engage the gear."

"If the gears are forced into gear when they are not synchronized, impact and noise will inevitably occur due to the speed difference between the two gear teeth."

"This not only makes it difficult to shift into gear, but also shortens the life of the gear teeth, causing increased wear on the ends of the teeth, and even causing the gear teeth to break."

“So we need to take measures in the transmission structure to ensure smooth gear shifting, simplify operation and reduce driver fatigue.”

“The synchronizer was designed to meet that requirement.”

"The synchronizer currently used on 3MT adopts a friction system with a disc-type friction pair."

“Its characteristics are a large friction area and rapid synchronization, but it requires a large space in the gearbox and is not easy to arrange.”

“The 4MT has one more gear than the 3MT, but I don’t want the overall volume to increase significantly, so I used a conical friction pair when designing it.”

"Its characteristics are high friction efficiency, small space required, and easy to implement."

"Compared with the previous generation 3MT..."

Jiang Hui stood on the stage with full confidence. He could clearly explain the various conditions of the 4MT manual transmission without even looking at the information in his hand.

After all, he drew this product himself, picture by picture, and it is also the best graduation design product of the Vehicle Engineering Department of Capital Polytechnic Institute in all these years.

Now it has been produced at the Capital Gear Factory and there have been no problems at all.

However, when Jiang Hui's eyes lingered on the judges, he discovered that Li Nanhai, the director of the Capital Gear Factory, walked into the conference room with several people who looked like leaders.

Jiang Hui felt that one of them looked very familiar.

(End of this chapter)