China's automobile industry is in& nbsp; Status and Development Trends in the Au

1、 The Position of China's Automotive Industry in the Automotive Industry System

(1) According to the calculation of China's automobile product import and export, the trade competition index of China's automobile industry was -0.7 in 2000 and -0.77 in 2001, and -0.85 in 2002. The automobile industry in our country is still a fundamentally uncompetitive industry. From the aspects of industry scale, enterprise scale, technological level, competitiveness, etc., China's automobile industry is also an overall non competitive industry. For a considerable period of time, China's automobile industry was still dominated by the domestic market.

(2) At present, in the division of labor system of multinational corporations, China's automobile industry is located in the processing and manufacturing stage as a whole. Although it is at a relatively low level compared to those who only engage in assembly, it still belongs to a relatively low level.

(3) China's automobile industry has a huge and developing market, low-cost labor, complete and strong manufacturing supporting capabilities, and a strong and complete technological system. China's automobile industry can achieve comparative development in the 21st century, with conditions and possibilities for improvement in scale, technological level, and competitiveness. At present, China's automobile industry has a significant dependence on multinational corporations, but due to various favorable conditions for its development, it may eventually become an industry with independent capabilities and competitiveness.

(4) After a period of rapid growth, China's automobile industry is expected to become one of the world's major automobile manufacturing bases around 2010, gradually becoming the main production base for commercial vehicles, and becoming the main supplier of commercial vehicles and mid to low end sedans for development. It will also become the manufacturing center for certain automotive components in the automobile industry.

2、 Optimize the brake pedal feel of the car effectively

To optimize the brake pedal feel of a sedan, it is necessary to identify the influencing factors and take measures to improve and optimize them based on experiments to reduce their impact on the brake pedal feel. After studying the relationship between car brake pedal force, car brake pedal stroke, and vehicle speed reduction, it was found that when the vehicle brake stroke meets the braking demand conditions (such as the car brake pedal force being lower than the lower limit requirement), the car needs to use a large pedal force during braking, which makes the driver feel that the braking is soft during driving. The feeling of the brake pedal for a sedan can be determined by the braking efficiency of the sedan.

The following optimization scheme can be adopted for the overall braking efficiency of the sedan: increasing the cylinder diameter of the front caliper while increasing the radius of the front brake of the sedan. Under the above changes, in order to match the front and rear brakes, the radius of the rear brake of the vehicle should also be increased. After adopting the above optimization scheme to modify the vehicle braking system, although the car pedal bracket of the sedan has been modified; There is no significant change in the travel distance, but the brake pedal force of the sedan has a noticeable decrease compared to the force required to step on the pedal when braking the sedan. In addition to improving the braking efficiency of the car, optimizing the parameters of the vacuum booster can also be used to optimize the feel of the car's brake pedal. By adjusting and optimizing the assist ratio of the vacuum booster during the process of improving the vacuum booster, the output pressure of the vacuum booster can be increased under stable input force conditions. This means that the pressure of the car's brake system pipeline can be increased without changing the force of the car's brake pedal, allowing the car to achieve deceleration at a fast speed. In addition to adjusting the assist ratio of the vacuum booster, the feeling of the car brake pedal can also be adjusted by adjusting the initial force and jump value of the vacuum booster. In this adjustment process, reducing the initial force of the car brake can lower the initial pedal force of the car brake, thereby improving the initial pedal feeling of the car brake and laying a good foundation for the later brake pedal feeling of the car. After calculating and analyzing the braking system of the test vehicle, combined with the manufacturing capacity of current car vacuum boosters, it is more suitable to control the initial force of the vacuum booster within the range of 40N-70N. By increasing the jump value, the initial pipeline pressure of the oil pipeline can be increased, laying a good foundation for the initial braking deceleration that the car can obtain during braking, thereby optimizing the feeling of the car's brake pedal. However, for the range of the jump value increase, if it exceeds this range, it will form a two-stage feeling on the car's brake pedal, which makes it easy to form a poor control pedal feeling when the deceleration is too high in the early stage of stepping on the brake pedal to brake the vehicle. Research experiments have shown that controlling the jump value within the range of 17-23 bar can easily improve the car's brake pedal feeling. Based on the analysis of the pedal force and the deceleration curve of the vehicle, the assist ratio of the vehicle vacuum booster was increased from 6.0 to 7.5, the initial force was controlled within the range of 40N-70N, and the jumping value of the vacuum cleaner was controlled within the range of 17-21bar. After testing the feeling of the car brake pedal, it was found that after adjusting the key parameters of the vehicle vacuum booster, the brake pedal stroke of the car did not change compared to the original, and the brake pedal force of the car showed a good trend, and one of the trends was more obvious. Although this trend was not significantly affected by the adjustment of the car brake efficiency scheme, the required car brake pedal force under the same braking and deceleration conditions also had a significant effect. Compared to before the improvement, there has been a significant improvement in the brake pedal feel of the sedan. In addition to the two optimization schemes for the brake pedal feel of cars mentioned above, measures can also be taken to optimize the brake pedal feel of cars by adjusting the vacuum degree of the car engine, the stiffness of the pedal and wall, and the stiffness of the vacuum booster. However, when choosing which optimization method to use, it should be noted that some optimization schemes for the brake pedal feel of cars can achieve good brake pedal feel, but they have improved in other aspects such as car wear, reduced service life of spare parts, and vehicle maintenance, which affects the overall use effect of the vehicle. Therefore, when choosing the optimal solution for optimizing the feel of the car brake pedal, it is necessary to comprehensively consider the balance from the overall perspective to ensure the stability of the car brake system.

The braking system of a car is important for the vehicle, therefore, it needs to be given sufficient attention. The feeling of the car brake pedal is an important component of the car braking system, which has a significant impact on the comfort and performance of the car during driving.

3、 The Development Trend of China's Automotive Industry in the World Automotive Industry System

(1) China's automobile industry is accelerating its integration into the global automobile industry system. With the further expansion of multinational corporations' investment in Chinese automobile enterprises, more and more Chinese automobile companies will enter the system of multinational corporations, and China's large automobile enterprises will also cooperate more closely with multinational corporations. Multinational corporations not only play an important role in mergers and acquisitions of vehicle production, but also in mergers and acquisitions of automotive parts enterprises. With the opening up of China's automobile sales system to the outside world, the competitiveness of multinational corporations in the Chinese automobile market will be further enhanced. The interdependence between China's automobile industry and developed automobile industry will become increasingly close. The strategic alliance between automobile manufacturers and Chinese automobile enterprises is becoming more flexible and open. Chinese automobile companies and multinational corporations will have long-term cooperation and competition.

(2) Both sides complement each other's advantages, share the benefits of the world market and our country's market. In 2002, China's automobile market had become an emerging market for global development. By 2010, the annual growth rate of demand for cars in China will maintain a rate of 11% -13%. With the gradual reduction of tariffs in China and the realization of economies of scale in automobile production enterprises, the price of sedans will continue to decrease, and more and more people will enter the consumption of sedans. Multinational corporations will share the benefits brought by the continuous expansion of China's automobile market with our partners.

The components of China's automotive industry will enter the procurement system of multinational corporations in many places, and China's automotive industry will become an important processing and production base for certain vehicle products of multinational corporations. Multinational corporations gain cost advantages and diversify production and operation risks by transferring production and manufacturing to China. China's automobile industry has comparative advantages in the division of labor in the automobile industry: the wages of Chinese automobile workers are only 1/10-1/15 of those of Japanese workers; Competitive in the production of commercial vehicles; Competitive in the production of certain labor-intensive automotive parts; It is expected to be competitive in the mass production of popular sedans; It also has the advantage of low cost in terms of technology; I am very familiar with the automotive market in our country. Multinational corporations have technological superiority and superior production and distribution capabilities.

(3) The position of Chinese automobile enterprises in the world automobile industry system will gradually improve. Among the factors of capital, market, labor, and technology in the development of the automotive industry, what China needs is technology. Due to the significant technological gap between China's automotive industry and developed automotive industries, transferring technology to China will not pose a threat to multinational corporations. As an important production link for multinational corporations, the strengthening of China's automobile industry can enable multinational corporations to make greater use of the low-cost labor they obtain in China and gain competitiveness.

With the gradual acquisition of technological capabilities by Chinese automobile industry enterprises, the utilization of Chinese technical talents by multinational corporations, and the resulting technology spillover effects, Chinese automobile enterprises will allocate technological capabilities within their scope. The prosperity of China's automobile industry will attract talents from high-tech industries, and the position of Chinese automobile enterprises in the world automobile industry system will gradually improve. Designed by multinational corporations, our production model will gradually change. One is to switch to my profession and participate in design (with multinational companies or foreign automotive design companies); Secondly, the design is mainly carried out by our professional designers; Thirdly, multinational corporations entrust certain design work to Chinese designers, but they possess core technologies; Fourthly, Chinese automobile companies produce products with their own intellectual property rights. This process takes about ten years. If Chinese automobile companies can seize the opportunity of the automotive industry revolution, this process can be further shortened. In short, the design capabilities of China's automotive industry enterprises will gradually improve, ultimately forming a division of labor and cooperation between the entire automotive industry and multinational corporations in research.