Domestic cars started late, and in the development process of the previous decades, the Chinese people have been looking down on domestic cars. Every time domestic cars are mentioned, Chinese people will always think of the terms poor quality and cheap. Now domestic cars finally have their own technology, the quality has also improved, and many first-line independent brands have also launched high-end platforms, and even exported to foreign countries.
The development of domestic cars is getting better and better, but the debate on the core technology of domestic cars has never stopped, especially the fuel consumption of domestic cars, which makes many car owners who have purchased domestic cars very headache. In tiger motors' rankings, domestic cars occupy many seats.
Why do domestic cars have high fuel consumption? Insiders name three key reasons.
The first reason is that the engine technology is not perfect. Geely, Great Wall, Chery, Changan and other independent brands have made breakthroughs in core technologies and have their own engines. However, there is still a big gap between domestic engine technology and foreign engine technology, especially in the injection technology of the engine and the valve control technology, there is still a lot of room for progress in domestic cars.
At present, most of the independent brand engines are still using multi-point electronic injection technology, and the engines of the joint venture brand have basically adopted direct injection in the cylinder. Like Honda's Earth Dream Engine, this engine has gained global recognition. Honda's 1.5T Earth Dream engine adopts in-cylinder direct injection technology, which can accurately control the fuel-injected gas mixture, so that gasoline can be burned more fully, ensuring the dynamic performance of the vehicle while ensuring fuel economy.
The second reason is the high quality of the kerb. On the bright side, domestic cars are thick in terms of materials, and the body weight is heavier than that of Japanese cars. However, if it is from a technical point of view, the technology is not mature enough to achieve lightweighting.
In order to meet the needs of domestic consumers and reduce the fuel consumption of vehicles, many investment brands have adopted lightweight designs. Their development time is earlier than that of domestic cars, and the time spent on researching lightweight bodies is relatively small. However, domestic cars lag behind the joint venture brand by twenty or thirty years, and now they are just catching up with the joint venture car, and it takes some effort to study lightweight bodies.
Achieving lightweighting is a difficult system project that requires the quality of the car and the weight of the body. And in what way to achieve this? What materials to use and how to change the body design need to spend a lot of time to test, which is a relatively big test for domestic cars.
Third, the adjustment ability of the gearbox is lacking. The gearbox and engine are two completely separate components, but they work closely together. The gearbox assembled into the car needs to be highly matched to the engine in order not to waste the kinetic energy generated by the engine, all of which is transmitted to the drive shaft to drive the vehicle forward.
Although many independent brands have their own engines, they do not have gearboxes, and now they still rely on purchasing other people's gearboxes to develop. The adjustment of the gearbox is difficult, the joint venture brand has also reached the current level after decades of exploration, and the independent brand is a short board in the gearbox adjustment, and it needs to continue to work hard.
summary:
Compared with ten years ago, the progress of domestic cars is very obvious, we affirm the progress of domestic cars, but also to see their shortcomings in the development. Only by continuously improving the lack of improvement, domestic cars will get better and better. There is still a big gap between the strength of domestic cars in the field of traditional fuel and the joint venture brand, which is a fact that cannot be changed.
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