Zhang Shuguang said to Yang Jie: "Yang Shao, before coming, our Ministry of Railways determined that we need to introduce 9 key skills, five generous aspects, divided into train assembly, high-speed bogie, car body, traction transmission control, braking system and network control system. I have also carefully checked your company's many technical patents, and I understand that your skills in traction control, braking system and network control system are very strong, and some skills are stronger than those foreign manufacturers who produce high-speed trains, and I also very welcome your company to participate in high-speed train projects. ”

"Director Zhang, if the Ministry of Railways procures fuel cell high-speed trains, it will open another window for our company in the field of fuel cell application, and there is no company in the world at this stage for such a technical route. ”

Yang Jie said: "I like to walk some roads that others have not taken, and I don't like to run behind other people's butts." ”

"Yang Shao, we at CSR Group Company also very welcome high-tech companies like you to participate. Han Shaoqi on the side said excitedly.

At this time, he had already made up his mind that if the Ministry of Railways did not approve, CSR Group Company would also establish a joint venture with Huaxing Group Company to develop new fuel cell high-speed trains.

"Han Dong, CSR Group Company has been more than 40 years since its establishment, and has accumulated a large number of experience and technical talents in the design and development of various trains. ”

In the afternoon, Yang Jie also accompanied Zhang Shuguang and Han Shaoqi and others to visit the test platform of the bus traction motor of Zhongyuan Automobile Company.

Airplanes!

The technical staff energized the motor rotor, the traction motor ran at high speed, and the surging power drove the bus on the test platform to reach a speed of 240 kilometers per hour.

After more than a year of joint efforts by technical engineers from Scania Group and Zhongyuan Automobile Company, a number of bus prototypes have been trial-produced, several of which have been sent to Sweden for safety crash tests, and several of which are also being tested in the north and south of China.

Yang Jie didn't want to waste time, so he simply built more than a dozen prototypes at one time and carried out different tests at the same time.

The trial production and testing standards of the prototype are strictly in accordance with the standard process of the Scania group company, among which Zhongyuan Automobile Company also uses dozens of digital simulation experiments, trial production experiments and research experiments in this process, and the design team has carried out complex combination matching of many parameters involved in the chassis suspension system, and established a computer simulation dynamic model to imitate the bus in 0-240km/ h. Different speed levels are operated, and various track spectra are used to excite and disturb, and the safety performance, vibration damping effect and safety performance indicators of the suspension system are analyzed.

Finally, the ultimate suspension parameters are determined by selecting dozens of parameter combinations.

And Zhongyuan Automobile Company is also specially built for this vehicle high-speed rolling vibration test bench, such different types of vibration test bench in recent years Huaxing Group Company has purchased more than a dozen units from the aerospace group company, only Zhongyuan Automobile Company has purchased 3 units, the largest one is 35 tons, specifically for more than 20 tons of buses for rolling vibration testing.

Yang Jie has always attached great importance to these experimental testing equipment, and also uses these high-precision tools to sponsor the company to establish a very rigorous and scientific R&D system from the most basic materials to production, which has also greatly improved the R&D efficiency and product quality.

At this time, Zhang Shuguang saw that the chassis suspension of the bus was carried out on the test bench for the instability critical speed test, with 10km/h as a unit, the test speed continued to be superimposed upward, the tires of the bus turned faster and faster, and the rollers below made a sharp friction sound, but the body of the car was never moving.

Eventually, the maximum critical speed of the suspension of the bus chassis reached the limit of the bus's capacity.

"According to the passenger comfort experience experiment, our company has developed the bus cabin stability index evaluation standard, less than 3.5 is excellent, the company's bus request to reach the excellent level, and the speed of 240 kilometers per hour bus stability index is below 3, the ride is very comfortable, this is the highest level that our company can achieve. ”

Gao Yongjun, deputy chief engineer in charge of developing the chassis suspension system, said with a complacent face.

Subsequently, Zhang Shuguang and Han Shaoqi also visited the traction electric drive system and control system independently developed by Zhongyuan Automobile Company.

The traction electric drive system includes fuel cells, traction converters, traction motors, etc., and the core skills such as control units and drive modules are controlled by the R&D team of Zhongyuan Automobile Company.

Gao Yongjun is a senior engineer transferred from the electrochemistry laboratory, and Xue Xiuhui and others are also transferred with him, distinguishing from the electrochemistry laboratory and the machine tool research institute, all of which are senior talents created by the laboratory in recent years.

"Yang Shao, if you hadn't seen it with your own eyes, I really wouldn't have believed that our domestic fuel cell technology and motor traction technology could do this. Han Shaoqi said in shock: "Now the scientific research degree of Huaxing Group Company is not bad at all compared with some foreign companies. ”

"When it comes to fuel cells and traction motors and handling systems, we are really at the forefront of the world. Yang Jie said with a smile.

"Yang Shao, just now I saw that you can control the situation of every part of the bus at any time, realize fault prediction and health status assessment, such a skill I have not seen in the assessment of Kawasaki Heavy Industries in Japan, how do you do it?" Zhang Shuguang asked.

"You should ask Gao Yongjun this question. Yang Jie said with a smile.

"Director Zhang, in previous years, the R&D team encountered a very complex problem, the electromagnetic compatibility test of the prototype car did not pass, we checked for a long time without results, and then we had to come up with a stupid measure, prepared thousands of probes buried in various electrical equipment in the car body to collect data, and then the collected data modeling analysis one by one, check abnormal signals. We adjusted the model while observing the data waveform, and finally solved the problem satisfactorily. ”

Gao Yongjun said: "In this process, we also thought that this measure can be used in the guessing and health management of vehicle equipment failures, we began to use sensors all over the train for data collection, and in the middle of the collection of materials accumulated by Zhongyuan Automobile Company for decades, using these data for modeling, now we can use the program we wrote to analyze and predict the failure, can guess the remaining life of the car body parts, and realize the visual management of vehicle health status." ”

"With this software, we can now create problems and make analyses and predictions in the first place, especially potential problems. ”

Hearing Gao Yongjun's words, Han Shaoqi and Peng Huqi both had their eyes lit up!

Han Shaoqi said excitedly: "Yang Shao, can your company also help our CSR group develop such a set of software?"

"Of course, there is no problem with this. Yang Jie nodded with a smile.

Later, everyone visited the production workshop of Zhongyuan Automobile Company, which is producing large tank cars and chassis bogies for vehicle transporters.

I saw the CNC machine tool roaring on the production line, the cutting fluid gushing, and the robot arm put the processed parts into the set operating table.

"This is the frame of the bogie being processed. ”

Gao Yongjun pointed to the rows of assembled bogies on the shelves and said.

These bogies on the chassis of heavy-duty mid-axle trailers resemble four-wheeled metal trolleys, each equipped with a frame, suspension, motor traction and braking components.

At the top of the bogie, there are two lid-like devices with air springs attached to the bottom, which are the suspension devices used for vibration and noise reduction.

At this time, Zhang Shuguang also specifically inquired about the technical details of the bogie.

Reborn University Tyrant Latest Chapter 415 Bogie!Website: