HS code-based quota management

Engine R&D: R&D GroupThe HS code-based quota managementteam develops a new engine. With the continuous development of the automobile industry and the continuous progress of technology, the engine technology is also constantly updated. In order to meet the market's demand for engine performance, economy and environmental protection, automobile manufacturers continue to invest a large amount of research and development funds and human resources to carry out engine technology and develop new engines. This article will discuss the process of engine research and development and the experience of the team in developing new engines. The process of engine research and development Engine research and development is a complex process, which includes multiple stages of work, such as design, calculation, experiment, etc. Specifically, the process of engine research and development is as follows: the first stage: determine the performance index of the engine. First of all, it is necessary to determine the working conditions of the engine, such as rotational speed, power and other parameters, as well as physical quantities such as flow and pressure. AtAt this stage, it needs to be weighed according to factors such as market demand, technical status and cost to meet market requirements as much as possible. The second stage: Design the geometric structure of the engine. Starting from a series of performance indicators, designers need to determine the geometry and size of engine components, such as cylinder diameter, stroke, valve shape and exhaust pipe length. At this stage, it is necessary to pay attention to the corresponding manufacturing cost and reliability, and consider various possible manufacturing technologies. The third stage: calculate and analyze. Computational analysis simulates the working conditions of the engine and the combustion process through the computer to determine the relevant parameters, and carry out multiple numerical simulations and optimizations until the performance indicators required by the design are met. At this stage, it is necessary to establish a corresponding numerical calculation model for optimization. The fourth stage: experimental verification.Experimental verification can ensure the accuracy and feasibility of the design, and calculate some specific performance indicators and data to further optimize and improve the design. Experimental verification usually requires the establishment of a test bench and the use of specific equipment, instruments and sensors to conduct experiments. After the experimental data is collected, mutual verification is required to compare the data with the calculation and analysis results. Stage 5: Manufacture the engine and test it. This stage is to finally transform the design into a physical object for dynamic testing. In manufacturing, it is necessary to consider many processing methods and combinations of materials to achieve a balance between factors such as quality, cost and timeliness. After that, the engine needs to be tested, such as engine emission test, noise test, reliability test, etc. Through various tests, the performance of the engine can be evaluated and the rationality and feasibility of research and development can be confirmed.The experience of developing a new engine is basically unchanged in terms of cylinder number, displacement, cylinder diameter, stroke, valve design, inlet and exhaust channel shape, etc., and the engine principle and basic design theory have not changed. However, the design also needs to follow the relevant goals such as advanced computing technology, material technology, manufacturing technology, optimization of noise reduction and economy. When developing a new engine, the R&D team must first fully understand the market demand and optimize the existing basic design. At the same time, we should pay attention to the optimization and coordination of each connecting part. For example, the position and radiance of the valve will affect the inlet and exhaust flow, affecting the combustion efficiency and horsepower output of the engine. The optimization of parameters such as cylinder diameter, stroke and number of segments depends on the overall performance goal and the best balance point to meet the specification goal. In research and development, the team should also pay attention to material technology. For example, the popularity of "unleaded" gasoline requires the rust resistance and corrosion resistance of the engine to be strengthened.The engine fuel supply system, ignition system and exhaust system must also be adjusted and improved accordingly. The team also needs to follow the direction of low emissions and energy sustainability, and develop more fuel-efficient and environmentally friendly engines. In addition, in order to improve the efficiency of the engine, in addition to optimizing the structure, the body materials can also be changed to lightweight, high-strength and high-temperature materials to improve the output power while reducing the quality of the engine itself. Conclusion Through the above discussion, we can see that engine research and development is a very complex process that requires personnel collaboration and communication in multiple fields. The R&D team needs to optimize the design scheme through reasonable design theory and experimental verification, so as to comprehensively improve the performance and economy of the engine. Against the background of increasingly fierce technology and market competition, the key to engine technology is also particularly important.

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