Close the hood, sit in the cab, ignite, start the vehicle... Staring at the normal data flow on the diagnostic computer, Shen Ruijun showed a knowing smile, which meant that another "difficult and complicated disease" vehicle completed the confirmation of the fault point. In the maintenance workshop located in Anji Automobile Life Plaza on Dong'an Road, this scene occurs from time to time, and the title of "Famous Doctor of Automobile Repair" on Dong'an Road is also passed on by word of mouth among users, colleagues, and peers.
In 2021, Shen Ruijun ushered in his 40th birthday, 40 spring and autumn, from graduation, learning skills to today, 22 years of deep ploughing in the field of automobile maintenance. "The original intention does not change, the pursuit continues." Adhering to this motto, he is unswerving in the field of auto repair, brave to climb the peak, and at the time of entering the year of confusion, he has won a special "gift" through his unremitting efforts - the honorary title of "Shanghai Craftsman" in 2021.
Auto repair expert for users
"Maintaining every user's car is the proudest thing for me." Shen Ruijun told reporters.
For him, repairing a car is not just a job, but also a joy of solving puzzles. Relying on rich experience, solid technology, and the spirit of overcoming difficulties and never giving up, Shen Ruijun specializes in the "difficult and complicated diseases" of automobiles. Through fast and good maintenance, he has brought high-quality after-sales service to users and become an auto repair expert in the eyes of users.
"One of the most difficult repairs took 3 days and 3 nights to overcome the technical difficulties." Shen Ruijun recalled. According to reports, the car sent for repair is a new car, only traveled more than 200 kilometers, but there were two times can not start normally phenomenon, the owner's mood is more anxious.
After calming the user's emotions, Shen Ruijun immediately set up a research team and led two maintenance technicians to devote themselves to the maintenance of the car. Diagnosing the vehicle, looking at fault codes and frozen data frames, the maintenance team quickly determined that the car's problem was due to the fact that the HCU (Hybrid Control Module) did not communicate with other control modules.
Generally speaking, this kind of failure, first of all, to measure the module's power supply, wake-up and CAN (controller area network) data communication values, if they are normal, the use of interchange modules can be solved, but the condition of this car is not so simple. It is reported that the measurement plug-in voltage value is normal, the interchange of HCU modules is still the same, tossing back and forth for a day, the problem is still not solved; the communication data detected by the oscilloscope is indeed missing frame, in order to prevent detection negligence, after measuring again, it is determined that there is no problem with the detection results. What exactly affects HCU communications?
Shen Ruijun made an analogy: "It's like a patient, CT, MRI, etc. these all show normal, but the electrocardiogram will always miss a beat." ”
What's the problem? It was late at night, and the maintenance technicians had been busy all day, still clueless about the car's problems. Experienced Shen Ruijun pointed out that it may be that other control modules on the same Top have interfered with the communication signal of the HCU.
The next day, with this new idea, the maintenance technicians re-checked the power CAN module of the car one by one, the data measurement of each module took about 1 hour, while measuring while combing problems and omissions, has been busy until the evening, finally found the problem, and on the third day by Shen Ruijun personally majored in replacement, to ensure that other components and vehicle accessories are not damaged, in maintaining the best original state of the vehicle to complete the maintenance work.
For Shen Ruijun, providing users with quality services is the most priority. One night, the maintenance workshop came to a user, need to urgently repair the vehicle, the problem of the vehicle is still quite hidden, the technician on duty did not find the problem, maintenance can not start. Shen Ruijun, who learned of the situation, immediately drove from his home in Huinan Town, Pudong to the unit that night, checked the root cause of the problem and replaced the parts, and completed the maintenance work with the technician on duty, which deeply touched the user.
"A lot of users, including this one, keep in touch with me. I'm like friends with users, and I often talk about cars or life. Shen Ruijun said.
A famous auto repair engineer in the eyes of colleagues
Shen Ruijun likes to face difficulties and often delve into the "difficult diseases" of some vehicles. Over time, he has accumulated a wealth of maintenance experience, and colleagues will ask him for advice at the first time when they encounter faults that they will not handle. In the eyes of colleagues, Shen Ruijun is like a famous teacher, who can not only impart rich practical experience and solid technology, but also infect them with the spirit of craftsmanship who asks the roots and diligently.
A colleague commented: "We do car maintenance, generally speaking, is to find the parts that need to be repaired and solve it, but Shen Ruijun does not do this, he will study it very thoroughly, what is the root cause of the failure? Is it possible to avoid such problems? He will ask these questions to the bottom. ”
From drilling the trough to repair the car during the apprenticeship period, to self-studying while working to obtain the certificate of senior technician of automobile maintenance and inspector, and then to being selected as a senior evaluator of the national vocational skills automobile maintenance worker, Shen Ruijun has climbed all the way up in his career and bravely climbed one peak after another in skills.
"There is a mechanical book city opposite Shanghai Book City on Fuzhou Road, and I used to go there every weekend to read books and study various car maintenance techniques and principles." Shen Ruijun said, "This is also the basic requirement of loving a line, drilling a line, and constantly improving yourself." Engineers tend to specialize in a component or system, but our service technicians must be familiar with every system on the car, and any fault in the car must be able to repair, which is very demanding for maintenance technicians. ”
Today, Shen Ruijun is compiling his rich experience into a book for colleagues to share and reference. It is reported that at present, he has sorted out a number of tool manuals and maintenance methods, including not only special maintenance cases encountered in the past few years, but also covers the diagnosis and maintenance of new energy vehicles, and the tool manuals are mainly pictures, which is convenient for technicians to query fault codes and facilitate colleagues to intuitively check and consult.
In addition, Shen Ruijun also actively acts as AÓ Lè outside of work, enthusiastically "passing, helping and leading", popularizing knowledge and imparting skills to young colleagues in the company. As the head of the independent brand "Qijipai" studio, Shen Ruijun led his colleagues to explore multi-brand integration skills, guide all employees to innovate, improve skills, improve service quality, and improve user satisfaction.
One of the most critical goals of the "Qijipai" studio is to carry out practical training in the maintenance of new energy vehicles. Employees participating in the "Strange Tricks School" can grasp the maintenance technology of new energy vehicles faster by querying the summary data of faulty parts of new energy vehicles, and then repairing and inspecting actual vehicles, combining theory with practice. In addition, "Strange Skills" also has cross-brand mentoring activities to cultivate the maintenance ability of maintenance technicians of multiple brands. At present, many employees in the company's technician team have learned to repair multiple brands of vehicles, including Roewe, Volkswagen, Subaru, etc., to promote technology growth.
Leader in auto repair technology innovation
"From can lines (controller area networks, communication network systems for conventional fuel vehicles) to Ethernet systems, technology has revolutionized." Shen Ruijun said frankly.
With the wave of "new four modernizations" of automobiles rolling in, auto repair technology has also ushered in new fields such as batteries, electronic controls, and motors, which put forward higher requirements for the ability of maintenance technicians. Shen Ruijun has long been aware of this trend, in the field of "new four modernizations", he began technical research and innovation very early.
"In the past two years, there has been a lot more maintenance business for new energy vehicles, many of which are repairing batteries, and there will be (to repair batteries) every week." Shen Ruijun introduced, "At the beginning, it was just the main engine factory training, we started to repair, there was no standard. However, we believe that no standard can certainly not last, whether it is the safety problem caused by 380V high voltage, or the problem of improper operation leading to the destruction of the battery pack structure, which cannot be ignored. ”
Therefore, Shen Ruijun decided to set his own standards. One night, together with another technician, he took apart a battery pack in its entirety, numbered each part, recorded each step of the process, and repeated several process operations until the structure of the battery pack was fully understood. In addition, he also actively checked the internet to study on the Internet, participated in the training of the main engine factory, observed the maintenance of the main engine factory, and gradually extended the disassembly and maintenance process from the battery pack to the entire new energy vehicle.
A few days ago, with the imminent listing of Zhiji L7, Shen Ruijun was invited to Zhiji Automobile to participate in the training, which once again made him feel the earth-shaking changes in the automotive industry.
"In the past, there were only more than 20 modules on a car, and now many modules are 'three-in-one' and 'four-in-one' integrated, but the modules on the zhiji car have not become less, but more." Shen Ruijun told reporters, "A Zhiji L7 is equipped with 43 modules, with richer functions and more diversified. There are also two batteries in the car, four-wheel drive, perfect matching of the intelligent connection, intelligent driving, and wisdom cabin system. These all pose a greater challenge to our car repairs. ”
However, no matter how big the challenge was, it could not stop Shen Ruijun's pace of exploration. Having received the honorary title of "Shanghai Craftsman", he has packed his bags and is ready to climb the next mountain.