Research on the Spring of Vehicles with Spring Steel with High Equipment Quality
Over the past decade, due to the failure to solve high-performance materials and processes at home, the fatigue life of the small piece cross-section leaf springs produced in trial production has been very low. So far, multi-piece cross-section leaf springs with large mass have been used. In addition, the imported leaf springs for large buses and other heavy-duty vehicles also have localized problems with leaf spring materials or leaf springs. For export leaf springs with high performance requirements, it is still necessary to purchase imported materials. Solving the problem of localization of spring materials and spring products is a long-term task. Lightweight demand Vehicle weight reduction is the main approach to saving materials and energy. The type of injector used in the car nozzle is combined with the closed-loop feedback control of the fuel injection timing based on the needle valve lift signal of the cylinder nozzle, and the optimized injection characteristics are obtained. The maximum injection pressure exceeds the fuel injection rate. Very ideal. Since the engine has an oxidation catalytic converter, it can effectively oxidize, and eliminate the combination of diesel odor air-fuel ratio closed-loop control, optimized fuel injection control and post-processing, and provides a hardware basis for the engine's management system. This is the main reason why the engine's management system is in a very low level, under the premise of ensuring high power and economy. On this basis, the design stress of the spring can be increased. The mass of the spring is inversely proportional to the square of the spring design stress. With a little more design stress, the spring quality can be reduced a lot. Also researched and developed new high-strength spring steels and achieved great results. Passenger car leaf springs also need to be lightweight, which can be solved from two aspects: Firstly, develop new high-performance spring steels so that they can improve the design stress of the leaf springs. Secondly, replace the multi-piece leaf springs with small cross-sections. Foreign passenger cars using leaf springs, almost all adopt variable cross-section leaf spring. There are more and more Chinese buses using this type of spring. The bus chassis manufactured by Jianghuai Automobile Co., Ltd. has already adopted a small piece of cross-section leaf spring. However, there are a large number of passenger cars that cannot be used. The main reason is that accidental accidents may occur when a small number of cross-section leaf springs are broken, and when multiple leaf springs are broken, it is not easy to cause accidents. Many bus manufacturers are worried about our springs. Steel materials and heat treatment processes are not reliable enough to use less leaf springs. The number of spring steels used in leaf springs for trucks in China accounts for about the total amount of automobiles used, which reduces the quality, and it has significant significance for saving materials and saving energy. In terms of weight reduction, as with passenger car leaf springs, two main measures are used. On the one hand, new high-performance spring steels are used to increase the design stress of the springs. In this regard, Japan started earlier. Japan used a lot in the past, and it has been used as the limit stress value under stress. From the beginning to the end, the design stress has been used to increase, and the design stress has only increased but the spring quality has been reduced. On the other hand, a small piece of cross-section leaf spring is used. Spring wire used in cars, especially springs, has the greatest economic and social benefits only when it enters the international market. As the leaf springs produce products that are used in large quantities and consume large amounts of energy, the leaf springs used in developed countries have already been gradually transferred to foreign countries in the international market. In the past, the leaf springs that we exported in the past were most likely to require low leaf springs with low added value. After the introduction of high-performance new type spring steel, the main goal of China's leaf spring exports will be international high-performance, high-value-added leaf springs. Compared with traditional spring steels at home and abroad, the new spring steels have a very significant increase in tensile strength, and the design stress can be greatly improved. Based on the above situation, because the main mechanical properties of the new series of spring steel is equal to that of the new foreign steel in the world, it is a basic guarantee for the upgrading and replacement of commonly used spring materials to realize the localization, light weight and internationalization of automotive spring products. The raw material for making the tray, double-sided silicone oil, is not easy to stick, good quality, high transparency
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