Chapter 59 4MT Expert Review and Acceptance Meeting
The weather in the capital, once it enters September, the intense heat will slowly pass.
Especially in the morning and evening, the weather is no longer so hot.
Even if the sun is already rising high at seven o'clock, you won't be sweating while riding a bicycle.
Jiang Hui skillfully parked the Phoenix 18 bicycle in the bicycle shed and headed towards the second canteen.
On the way, I said hello to some familiar faces from time to time, and then comfortably drank a bowl of millet porridge, a fried dough stick, and two lard and cabbage buns in the cafeteria.
Today is the day of the Capital Gear Factory 4MT manual transmission expert review meeting.
They have successfully produced the first batch of prototypes last week. After preliminary verification, the performance in all aspects is very good.
So Chief Engineer Ji Hua couldn't wait to go to the First Machinery Department to report, so that the news could spread quickly within the system.
Of course, new technological breakthroughs in this era are not breakthroughs just because manufacturers say they have.
Instead, experts need to be invited to carry out special review and acceptance. Only when this link is mastered can a technological breakthrough be truly achieved.
Today’s expert group members include technical experts from the Ministry of Machinery, as well as professors from Huaqing University and Capital University of Technology.
Even FAW and Second Automobile Works have specially arranged personnel to come and participate in the review meeting.
After all, if the 4MT manual transmission is successfully developed, it will not only be used by Capital Automobile Manufacturing Plant, but also FAW and Second Automobile Works.
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 Factory. After breakfast, I went to the office to pack my things, then rode there, and arrived at the designated conference room before nine o'clock.
The experts are waiting in a special lounge, and the personnel of the Capital Gear Factory are setting up in the conference room.
Ji Hua, the chief engineer, has arrived at the conference room in advance. Zhu Jiansheng and several teachers and students from Capital Institute of Technology, as project participants, are also already in the conference room.
The other person who participated in this event as a judge was the director of the Department of Vehicle Engineering.
This vote is basically stable.
"Jiang Liaison, everyone is full of expectations for the 4MT manual transmission you designed."
"As long as it passes this review, it can begin to be sold to various domestic customers such as FAW and Second Automobile Works. , it will be in volume soon.”
“You, the designer, will definitely be the biggest contributor then.”
Ji Hua is in a very good mood now.
Although 4MT was not designed by Capital Automobile Gear Factory, as the first domestic production factory, they can reap a lot of dividends.
Especially when Jiang Hui designed this gearbox, all supporting points of the gearbox were consistent with the previous 3MT to the greatest extent.
In this way, other car models need to be changed from 3MT to 4MT, which can be completed without making too many improvements.
Even the BJ212 currently being produced by the Capital Automobile Manufacturing Plant can be installed in a car by simply changing the shape of a few brackets.
Although only one gearbox has been updated, the overall performance cannot be greatly improved.
But you can also enjoy some of the benefits of improved maneuverability and reduced fuel consumption.
The future of the 4MT manual transmission is bright. "No matter how well we design 4MT on paper, we still need the factory to conduct trial production before we can set the final specifications."
"Your Capital Gear Factory has rich experience. It took a lot of effort to produce 4MT so quickly.”
Jiang Hui’s words were not just polite, the Capital Gear Factory had indeed made a considerable contribution. .
“When the experts review it later, the first stage is 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 there should be no big problem.”
Seeing that the review meeting began soon, Ji Hua gave Jiang Hui a brief explanation.
Jiang Hui also listened more seriously to this.
This is the first result that has been put into production, so we can’t be careless.
“This 4MT manual transmission is a two-shaft manual transmission. Its characteristic is that the output shaft is parallel to the input shaft and there is no intermediate shaft. The power of the engine is transmitted to the transmission input shaft through the clutch, and then after the gear transmission The output shaft is output to the main reducer. "
"This kind of gearbox is driven from the input shaft to the output shaft through only one pair of gears, and there is only one intermediate gear in the reverse gear transmission route, so it has high mechanical efficiency. Little noise.”
"It is very suitable for cars and micro and light trucks with front-engine and front-wheel drive or rear-engine and rear-wheel drive."
Although Jiang Hui is young, he has no stage fright at all.
After briefly greeting each judge, he began his introduction.
“Compared with the previous 3MT, in addition to one more gear, this gearbox has also made great improvements in the synchronizer.”
“As we all know, the gearbox During the gear shifting process, the circumferential speeds of the gear teeth to be meshed in the selected gear must be equal to make them enter mesh smoothly and shift into gear.”
“If the gear teeth of the two gears are out of sync and the gear is forced into gear, impact and noise will inevitably occur due to the speed difference between the two gear teeth.”
“This will not only make it difficult to gear into gear, but also affect the life of the gear teeth. This will intensify the wear of the tooth ends and even cause the gear teeth to break. "
"So measures are required to be taken on the transmission structure to ensure smooth shifting, simplify the operation and reduce driver fatigue."
“The synchronizer is designed to meet this requirement.”
“The synchronizer currently used on 3MT adopts a friction system with a disc type friction pair.”
“It is characterized by a large friction area and rapid synchronization, but it requires a large space in the gearbox and is difficult to arrange.”
“4MT has one more gear than 3MT, but the overall volume is not the same. I don’t want a large increase, so I used a cone friction pair when designing. ”
“It is characterized by high friction efficiency, small space required, and easy implementation. ”
"Compared with the previous generation 3MT..."
Jiang Hui stood on the stage with a confident face. He could understand the various features of the 4MT manual transmission without looking at the information in his hand. The situation was explained clearly.
After all, this product was drawn by him one by one, and it is also the best graduation design product of the Department of Vehicle Engineering of Capital Institute of Technology over the years.
Now it is produced by the Capital Gear Factory and there are no problems at all.
But when Jiang Hui's eyes stopped at 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.
One of them looked very familiar to Jiang Hui.
(End of this chapter)