The pneumatic butterfly valve is filled with compressed air in a sealed container, and its elasticity is realized by the compressibility of the gas. The pneumatic butterfly valve has an ideal nonlinear elasticity. After the height adjustment device is installed, the body height does not change with the increase or decrease of load. The ball valve stiffness can be designed to be low, and the ride is quiet. However, pneumatic butterfly valve suspension has complex structure and high manufacturing cost. The working principle is to fill the closed pressure cylinder with inert gas or oil gas mixture, so that the pressure in the chamber is several times or dozens of times higher than the atmospheric pressure. The movement of the piston rod is realized by using the pressure difference generated by the cross-sectional area of the piston rod being less than the cross-sectional area of the piston. Because of the fundamental difference in principle, the balloon valve has obvious advantages over the ordinary ball valve: the speed is relatively slow, the dynamic force changes little (generally within 1:1.2), and it is easy to control; The disadvantage is that the size is smaller than the screw ball valve, the cost is high, and the service life is relatively short.
2、 Foreign related industrial policies
The strategic advantage of air suspension system in the downstream link of the value chain should be multi-channel marketing strategy. Because the center of the downstream link is the customer, and various marketing activities (product positioning, advertising, distribution channels, promotional means, etc.) are closely related to the consumer's point. The marketing decisions of enterprises should fully consider the demand, supply, habits, culture and consumption habits of the local market, and take advantage of downstream links to occupy the market. Local marketing strategies often have distinctive regional characteristics, and may not bring success to another in one successful strategy. For example, according to the product design, the product is positioned to meet the needs of local consumers, and the local consumers' preferences are based on the local reality, to establish a sales channel. The use of popular advertising language has spread widely, and many local strong words are difficult to simply imitate or transplant, and it is difficult to share. Therefore, the markets all over the world cannot occupy and adopt differentiated products, and at the same time occupy the global market. The differentiated marketing strategy of the global marketing strategy must adopt different products and different marketing strategies to occupy different markets, Transnational marketing strategy.
3、 Internal Environmental Protection Regulations
In order to further accelerate the development of the automobile industry's electronization, we should formulate corresponding preferential policies, encourage automobile factories, automobile parts factories, automobile manufacturers and automobile electronics enterprises to accumulate and expand strategic cooperation relations, and give greater support to the automobile market. This cooperation is conducive to the complementary advantages of both sides, reducing the development cost of each other, and improving the development efficiency, It is a win-win strategic partner. Relevant. We should focus on supporting and cultivating several major automotive electronics leading enterprises and supporting independent brands. The independent brand is mainly supported by the following three aspects: the strategy in the automobile market, the choice of the automobile market should be from easy to difficult, we should give priority to the independent intellectual property rights of commercial vehicles, buses and cars as the market entry subjects, then the demand for joint venture automobile products, reduce costs and promote opportunities to enter the mainstream automobile market positioning, Quickly integrate into the global procurement system. On the technical route, it is necessary to cultivate the ability of independent innovation and introduce the technical route of. in the process of opening up. By making full use of the scientific and technological achievements of colleges and universities and scientific research institutes, colleges and universities have a group of high-level talents and development means. We need to combine an innovative market mechanism of integrated production, learning and research, and quickly transform the achievements into industrial productivity. In terms of industrial model, it is an effective model for developing China's automotive electronics industry at this stage to rely on large automobile enterprises (groups) and organize industrial alliances according to the R&D, industrialization and market-oriented industrial chain.
4、 Foreign Environmental Protection Regulations
More and more foreign investment has increased the need for pneumatic butterfly valves to build factories in a large area. These foreign-funded enterprises control the supply chain of China's disguised pneumatic butterfly valves. The local resources that pneumatic butterfly valves can easily do are simply processed or transported to foreign exchange reserves. What is more serious is that at present, key technologies have been applied to pneumatic butterfly valve masters in the United States, Japan and Europe. This has also led to the heteronomy of local enterprises of pneumatic butterfly valves in many fields.