Time flies quickly, May has passed in a blink of an eye, and the calendar has turned to June 1983, and a whole year has passed since Zhou Jingming's rebirth.

Thanks to the vigorous cultivation of the Ministry of Mechanics, in the past ten days, the name of Zhou Jingming, with Shencheng as the center, quickly spread to all parts of the motherland, just to visit the car factory, Zhou Jingming participated in three times, two days ago he came to Yanjing, to accept the Ministry of Machinery to his commendation, and Zhou Jingming finally met his previous life and this life are very admired Rao Bin.

On the other hand, the sales model of "4S store" proposed by Zhou Jingming, because of a successful model like Wen Zhuqing, coupled with the high degree of affirmation of the "People's Daily", is equivalent to being officially recognized.

First of all, Jinling Nanqi carried out the bidding for the 4S store, and then, BAIC and FAW also announced that they would build their own brand of 4S stores, for a time, the domestic car sales model, is rapidly developing towards the 4S store model, Zhou Jingming's fame, but also with the popularity of the 4S store in the country and more and more vigorous.

Car factory, on the test track.

After this period of intensive preparation, Qian Longcheng is responsible for the gearbox localization project, and finally took a substantial step, by the gearbox factory and agricultural machinery system cooperation units jointly developed gearbox housing and control mechanism and other components, also from the workshop officially off the assembly line, plus Zhou Jingming is responsible for the shift gear, in this way, a complete set of domestic gearbox is considered to be "patchwork" completed.

Today, what they have to do is to use this complete set of domestic gearboxes to verify the actual vehicle, and verify and evaluate the gearbox from the two aspects of assembly process and assembly performance, so as to provide reference data for subsequent improvements.

Qian Longcheng's side, this time a total of two sets of parts were prepared, after Zhou Jingming put on his gloves, he squatted down, picked up these parts and looked at them seriously, while Qian Longcheng and others stood aside, ready to listen to Zhou Jingming's opinion.

Now Zhou Jingming's status in the mechanical system is rising, not to mention ordinary technicians, even Qian Longcheng is polite to Zhou Jingming, but this also strengthens Qian Longcheng's determination to continue to hug Zhou Jingming's thigh.

"Ryoko, you take a few people, and first synthesize the gearbox. Zhou Jingming put down the parts in his hand, stood up and clapped his hands and said.

"Okay!" Xun Youliang immediately beckoned a few people, sorted out the parts on the ground, and prepared to synthesize the gearbox.

"How about it, Xiao Zhou, are these parts we initially produced okay?" After Zhou Jingming stood up, Qian Longcheng hurriedly asked.

During this period of time, the localization project can be said to have made Qian Longcheng suffer, and now that he has finally made progress, of course he hopes that there will be good results.

Zhou Jingming frowned, and then shook his head slightly, "The processing accuracy obviously does not meet the requirements, and if it is assembled at that time, there will definitely be risks." ”

Although he knew that the result would not be too good, Qian Longcheng still felt very bitter when he said it from Zhou Jingming's mouth, "It's the first time to produce, and many parameters have not been adjusted to the optimal range. ”

"Let's try it first, and we'll discuss it later if there is a problem. ”

However, the problem of the gearbox is far greater than Zhou Jingming imagined, because Xun Youliang has already encountered problems when they synthesize, because the center distance of the gearbox is relatively small, and the shift gear is difficult to synthesize when it is synthesized on the shaft.

"Director Qian, how much did you choose when designing the center distance of the gearbox?" Zhou Jingming frowned.

"It should be 56 mm, we measured it according to the original Santana gearbox, there shouldn't be such a problem!" Qian Longcheng said with a puzzled face.

"56 mm ......" Zhou Jingming whispered in his mouth, and then continued, "The follow-up center distance will be larger, the range is best between 60 and 80, the specific data, I will go back and calculate it and tell you, if the center distance is too small, the contact stress between the shift gears will become larger, and the life of the gears will be reduced." ”

"Okay, I'll listen to you. Qian Longcheng nodded without hesitation.

Under the joint efforts of Xun Youliang and several people, a complete gearbox was finally synthesized, and several people put the gearbox on the car together, although the assembly process is not easy, but fortunately, there is no big problem with the axial and transverse dimensions of the gearbox, and the gearbox can still be connected with the transmission shaft and the engine.

After the assembly, Zhou Jingming walked into the car, ready to test the performance of the gearbox, and among all the people present, there was no one more suitable for the job than him.

After starting the car, Zhou Jingming gently pulled the handbrake, the engine was still working, but the car did not move forward.

Neutral function is normal!

Immediately afterwards, Zhou Jingming adjusted the gear to reverse, and the car slowly fell backwards after shaking a few times.

The reverse function is also normal!

…………

After testing a few basic functions, Zhou Jingming began to increase the throttle and constantly shift gears during driving.

The impact of shifting is big!

The gearbox is noisy!

Shifting gears is laborious and not fast!

…………

One by one, the intuitive shortcomings were exposed one by one in Zhou Jingming's hands, and these will be the key targets in the next stage.

About ten minutes later, Zhou Jingming stepped out of the car, and his arm even felt faintly sore, although the basic functions of the gearbox can be guaranteed, but for the driver, such a gearbox is too laborious to operate.

"There are a lot of things that need to be improved, not to mention the laborious shifting, there will even be gear jumping during driving, and the impact of shifting is too great, it should be a problem with the synchronizer. ”

"The structure of the synchronizer is too complex, and it is not easy to produce it at our current level. Qian Longcheng said with a wry smile.

There are very few domestic manufacturers that can produce synchronizers.

"If it really doesn't work, change the synchronizer to a mesh set to try, in comparison, the production process of the mesh set is much simpler, and functionally, it can fully meet the needs of shifting. Zhou Jingming thought for a moment, and then suggested.

"Okay, then I'll do what you said, and try it with a mesh sleeve instead of a synchronizer. Qian Longcheng nodded hurriedly.

Next, Zhou Jingming said all the other problems existing in the gearbox, and subdivided these problems into the gearbox factory and the gear factory, but the problems found this time are some intuitive, as for more in-depth problems, it also needs to be tested and corrected in the future.

After the end of this loading verification, Zhou Jingming put his mind back on the improvement of the shift gear, the reason why there are so many problems in the gearbox is caused by the whole, not just a single component, what Zhou Jingming has to do is to share information with Qian Longcheng in a timely manner, and the localization research of both sides must communicate at any time and make a car behind closed doors, which is definitely not possible.

On this day, Zhou Jingming, as usual, was doing theoretical calculations at home, at this time, the phone suddenly rang, and when Zhou Jingming picked it up and answered, it turned out to be Su Wangting calling.

"It's such a Xiao Zhou, this time I called you, mainly to ask, do you have time on the 25th of this month, our school is going to ask you to be the representative of this batch of graduates, to speak to all graduates. Su Wangting on the other end of the phone asked with a smile.

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