Now, the 80 tank has begun to undergo repeated test runs, and if nothing else, this tank will most likely be selected by the army as a standard tank.

In this way, the engine supporting the above is also quite important, this six pairs of load-bearing wheels, the main breakthrough is the engine behind, although there are several engines in the research now, but the real maturity, can be used, it is only this one.

Zhang Baolin is naturally quite concerned about this engine.

"Have you found out the cause of the pipe burst?" While walking, Zhang Baolin asked: "I came here this time, in fact, mainly because of this problem. ”

Zhang Baolin didn't come to ask for the crime, it was just piggybacking, this old technician is still concerned about technical issues.

"Zhang Gong, if you were here, nothing would have happened." When Qin Zhenhua said this, he was filled with emotion.

Generally speaking, Zhang Baolin's level of technical personnel has their own arrogance, and when they encounter problems, they will never slap their butts and leave, but will solve them together.

Let's hope they remember the lesson.

Qin Zhenhua secretly thought in his heart, and said: "It is basically solved, after inspection, we found that there is a problem with the engine bracket, which caused the vibration of the diesel engine to be too large, and after starting for a period of time, the tube of the supercharger was shaken open, which was not consistent with the initial judgment that the pressure was too high." ”

Zhang Baolin nodded: "This is also what I thought of on the road, we have been rigorously tested, the pressure of the supercharger is too large, and the pressure will be relieved, it is impossible to burst the pipe because the pressure is too much, it must be something else." ”

"Your experience is really rich, Zhang Gong, can you stay in our first machine factory? Whatever treatment you want, we have it all. Qin Zhenhua said.

"You kid, it's really a human spirit, that's what hit my idea." Zhang Baolin said with a smile.

The atmosphere of the two quickly became harmonious, and when they walked into the test site, the 80 tank was being tested, watching it emit black smoke, shuttling back and forth in the test site, and the eyes of the two were full of expectation.

No matter how good it is abroad, it is also foreign, and only those developed by themselves are their own.

When the tank stopped, Zhang Xiangqian came out of the tank, took off the tank cap, rubbed his ears, and said: "No, although it is much better than before, but, on the whole, I still feel that the vibration and noise are very large, if you drive like this for a long time, it will cause a lot of burden on the tank's body." ”

Vibration and noise, still not small!

"When we were on the bench, we made this discovery, and we expected that the tank factory would be able to reduce vibration and noise as much as possible when it was installed, but we didn't expect it, but we still didn't do it." Zhang Baolin said.

"This is brought out of the engine mother's womb, which is also related to our current scientific research situation, in the West, NVH research has been a key point, and we are still blank here." Qin Zhenhua said.

“NVH？” Zhang Baolin repeated Qin Zhenhua's words.

That's right, it's an acronym for Noise, Vibration and Harshness. This is a comprehensive problem to measure the quality of vehicle manufacturing, we will feel very uncomfortable when we sit in our own 212, but it will be very comfortable to sit in a car produced in Europe, because of this NVH. ”

Zhang Baolin nodded, that's right, this thing should be taken seriously.

"So what should we do?" Zhang Baolin asked.

"The first is the control of its vibration and noise sources. We need to find out which parts are causing vibration and noise, and we need to improve the vibration characteristics of these parts to avoid resonance; Improving the balance of rotating elements requires scientific research and analysis, and for the time being, we plan to use our own manufacturing of a batch of precision-machined parts to replace them with this engine, and we will change these situations by improving the machining accuracy and assembly quality of the parts to reduce the impact and friction of the relative moving elements. ”

This is what everyone wants to do next, to improve the performance of the engine through precision machining, which only one machine factory can do.

This engine was built by the Coal Provincial Diesel Engine Factory, and now, a machine factory said that it would be improved, if it was replaced by another person, it was estimated that it would be annoyed, but Zhang Baolin knew in his heart that this problem was discovered when they were tested on the bench, but they couldn't solve it, and they could only pin their trust on a machine factory.

Precision machining is the most important thing.

"What about the German diesel engine?" Zhang Baolin asked.

The 1223 sample car is equipped with its own engine, the 1224 sample car is equipped with an engine imported from Germany, and in the back, there will be 1225 and 1226 sample cars.

These prototypes were all built in a machine factory.

If it weren't for the delay of the people in the R&D room, these prototypes would have been built a long time ago! Hearing Zhang Baolin's question, Qin Zhenhua said: "If you stay for a few more days, the 1224 sample car will be able to test the car, and now, this sample car is still in the final assembly." ”

Zhang Baolin nodded.

At the test site, after waiting until the end of the tank test and studying some small problems together, in the afternoon, accompanied by Qin Zhenhua, Zhang Baolin saw the 1224 experimental prototype in the factory that was being finally assembled.

Since it is a prototype car, it is all different, although they are all six pairs of load-bearing wheels, but in order to install a larger 8V331 diesel engine, as well as a supporting radiator, the tail of this tank, the space in the engine compartment is larger, not only increasing the length backwards, but also increasing the height upwards.

The abrupt engine top cover at the top is in stark contrast to other tanks, and there are two round heat dissipation holes on the top cover, which looks even more strange.

Of course, if you want to make people look at the past at first glance, you will definitely not be attracted by the engine compartment, the most attractive thing is its turret, which is different from the previous round cast turret, has become a welded angular turret, and the front of the turret still presents a certain arc, and the shape is quite beautiful!

Anyone would be attracted by its turret first, but Zhang Baolin's eyes quickly moved away and turned to the engine compartment behind.