From this scientific "car selection guide", look at the upward development of China's independent automobile brands

When you buy a car, what are the main aspects to look at? Safety, power, intelligence, NVH, reliability... On March 18, Yan Jianlai, secretary general of the Society of Automotive Engineers of China, Chai Zhanxiang, assistant president of the Automotive Industry Branch of the China Council for the Promotion of International Trade, and Changan Automotive engineers gathered in the online live broadcast room of the People's Network to comprehensively interpret these aspects and provide consumers with a scientific "car selection guide".

The quality philosophy of every solder joint

When it comes to security, what comes to mind? All kinds of safety configurations, or various safety collision standards, yes, safety is the premise of our measurement of a "good car", and it is also the primary criterion for our choice. As a result, before every car hits the market, it is seen that they need to undergo rigorous crash tests.

Chai Zhanxiang pointed out that the current international mainstream safety rating system is the United States NCAP, Europe's E-NCAP, China's C-NCAP, Japan's J-NCAP, etc., the design principle of these rating systems is similar, the speed and angle of the collision are slightly different, but the basic idea is to simulate the collision, flip and other accidents that may occur in the real process, and scientifically evaluate the vehicle.

"A crash test costs hundreds of thousands of dollars in development costs to best protect our customers. Because in real accident scenarios, the form is often complex and diverse, so we will pass a lot of tests before the vehicle leaves the factory to cover all accident scenarios as much as possible. Dian Bo, deputy chief engineer of vehicle collision structure development, said that in the process of automobile development, in order to provide users with a safe and secure car, not only to do crash tests, but also to carry out a series of work such as the optimization of the vehicle structure and the integration and matching of the constraint system in the early stage to ensure vehicle safety.

Dian Bo uses solder joints as an example, a car has more than 3,000 solder joints, and engineers repeatedly simulate and optimize the location, spacing, and form of force during collision. In order to ensure the quality of each solder joint, one or two real cars need to be randomly selected from the production line every month for tear inspection. "The tear inspection is destructive and irreversible, and we will tear the body layer by layer to see the solder joints inside. Our requirement for solder joint quality is 100% pass rate, which requires continuous optimization, testing, verification, improvement, until perfect. Dian Bo said.

From research and development to the lead to witness the strong rise of independent brands

In recent years, the development momentum of Continental Automobile's own brands has been strong, the quality improvement is obvious to all, and it has been continuously affirmed by the market and consumers. According to data from the Ministry of Industry and Information Technology, chinese brand passenger car sales in 2021 were 9.543 million units, up 23.15% year-on-year.

Chai Zhanxiang pointed out that in the field of research and development, national brands have the ability to "compete" in the same venue as overseas brands. Yan Jianlai said frankly that after 40 years of accumulation, China's automobile has ushered in an era of great transcendence, which requires continuous efforts and a high degree of integration in the automotive industry.

In this live broadcast, Wang Xiangang, chief power division of Changan Automobile Blue Whale NE, introduced the practice and exploration of the brand car in the independent research and development of the engine. He pointed out that the design and development of engines should not only consider power, economy, emissions, and NVH, but also consider production processes such as manufacturing processes. "The engine development process is a very complex systems engineering involving the basics of engineering thermodynamics, fluid mechanics, heat transfer, materials science, control engineering, manufacturing processes and many other disciplines. Our engineers in the development process will continue to use the knowledge and skills of multiple disciplines for systematic and comprehensive analysis, to create every detail and use scenario, to provide users with excellent power products and the ultimate driving experience, which is our original intention, but also our continuous efforts to move forward. He said.

Talking about the breakthrough of national brands in automobile intelligence, Song Zhenguang, senior deputy chief engineer of Changan Automobile Intelligent Research Institute, introduced that Changan Automobile has established a complete test and verification system from hardware to software: from chip selection, hardware design, battery compatibility, in-car video and 4G, 5G networking, and software code development, Changan Automobile has independently established a series of automated test systems and test equipment to ensure that the car can be fully tested and verified before delivery to users. Guaranteed delivery quality.

Automobile consumption upgrade Comfort has become an important indicator of car purchase

With the advent of the era of quality consumption, consumption upgrading has become the general consensus of the automotive industry. Yan Jianlai particularly emphasized that when consumers choose a car, comfort is an important consideration indicator. He took the sound of the vehicle as an example, people's pursuit of beautiful sound is eternal, consumers also have quality requirements for the sound of the car closing the door, so the tightness of the cockpit must be done appropriately. In addition, there is the noise of tire contact with the ground, the turn signal of the wrench, and the sound of the sound of not wearing a seat belt, which are all manifestations of the comfort of the vehicle.

In this regard, Yu Xiongying, senior engineer of Changan Automobile NVH, introduced the impact of noise on driving comfort. He pointed out that NVH is the abbreviation of noise vibration comfort, and the development of automobile NVH is to control the noise and vibration of the car, aiming to make the driver and occupants have a comfortable and pleasant experience. "There are three levels of NVH development. The first level is abnormal noise cancellation to ensure that the user drives without interference; the second level is low noise control to ensure the user's comfortable driving experience. The third level is the sound quality design to enhance the user's driving pleasure. Changan is currently very mature at the first level, and we focus on developing at the second and third levels. Yu Xiongying said.

"Integrity Carpool Festival" core welfare

In addition, Changan Automobile is carrying out the "Integrity Carpooling Festival" activity in March, during which the purchase of Changan Automobile can enjoy a cash discount of up to 16,000 yuan, and immediately enjoy 24 periods/36 periods/48 periods of zero/low interest and up to 8,000 yuan of replacement subsidies, this preferential policy will continue throughout March.