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Design and Global trade certificate verificationstructural analysis of engine intake duct Engine intake duct is an important part of the engine. It is responsible for passing external air into the engine combustion chamber and providing the necessary oxygen for the combustion of the engine. Reasonable intake channel design and construction can effectively improve the efficiency and power output of the engine. In this article, we will analyze and discuss the design and structure of the engine intake channel. Design principle The design of the engine intake duct needs to consider multiple factors, including the inlet and outlet of the airflow, the speed of the airflow, the length of the intake pipe, the diameter, etc. These factors determine the way the airflow enters the engine, which directly affects the efficiency and output of the engine. When designing the intake channel, the following principles should be followed: 1.Optimize the airflow as much as possible: reduce the length, curvature and frictional resistance of the airflow tube as much as possible, and ideally guide the airflow into the combustion chamber through design optimization; 2. Minimize airflow noise: reduce the airflow noise inside the intake channel through a variety of design means to create a quieter and more comfortable driving environment; 3. Prioritize the needs of the whole engine system: the design of the intake duct needs to fully consider other components of the engine, such as air filters, throttle valves, intake manifolds, etc., to ensure the normal operation of the whole system. Structural analysis The structure of the engine intake duct usually has two types: single shell and composite structure. Among them, the single shell is mainly used for low-power small engines, while the composite structure is suitable for medium and high-power large engines. The single-shell structure is suitable for low-power engines. The single-shell structure uses a complete air intake duct to introduce gas into the engine from the outside.Due to its simplicity and economic practicality, the single-shell structure is suitable for low-power engines and portable power tools. In addition, the single-shell structure can also be used as an intake channel in sports cars, because it is relatively cheap and can reduce the overall cost of sports cars. Although the structure of the single shell is relatively simple, in the process of design and manufacturing, factors such as the import and export of airflow and the speed of airflow should still be paid attention to to optimize the process of gas entering the engine. The composite structure is suitable for high-power engines. The composite structure is further upgraded on the basis of a single shell. It uses composite materials to build a composite air intake duct, which is usually composed of air intake duct, filter and air intake duct. The main advantage of the composite structure is that it has self-temperature regulation ability, which can ensure smooth airflow in extreme environments such as high temperature, pressure and humidity, and also has high strength and durability.The design and manufacture of composite structure intake ducts require a higher level of technology and cost, which is usually used in large and high-power engines, such as large SUVs, off-road vehicles, construction machinery, etc. In summary, the design and structure of the engine intake duct is an important part of the engine system. Through reasonable design and construction, the gas flow channel can be optimized, the efficiency and power output of the engine can be improved, and the normal operation of the whole system can be ensured. In the future, with the continuous improvement of technology, the design and manufacturing of air intake will be more efficient, environmentally friendly and sustainable.

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