The structure and function of the fuel filter The structure of the fuel injector is composed of an aluminum shell and a stainless steel bracket. A high-efficiency filter paper assembly is installed on the bracket. The filter paper is seen as a chrysanthemum shape to increase the flow area, and the EFI filter cannot be matched with the carburetor. The filter is universal. Because EFI filters often withstand 200 ~ 300kPa fuel pressure. Therefore, the pressure resistance of the filter is generally required to reach 500 kPa or more, and the filter of the carburetor cannot meet the requirements. The function of the fuel filter is to remove solid impurities such as iron oxide and dust contained in the fuel oil to prevent clogging of the fuel system, reduce mechanical wear, ensure stable engine operation, and improve reliability. Fuel Filter Replacement Instructions The fuel filter must be changed every 30,000 kilometers. If the fuel impurity content is large, the travel distance should be shortened accordingly. The arrow on the fuel filter housing indicates the flow direction of the fuel. When installing the fuel filter, no flipping is allowed. Even if it works in a flip state for a short time, it must be replaced. The recommended replacement cycle for fuel filters should be different based on their own structure, performance and use, and can not be generalized. If the filter is installed in the fuel line, it is called an external filter; conversely, the internal filter is a filter installed inside the fuel pump and the fuel tank. Fuel tank filters or their protective sleeves are usually considered as maintenance-free parts. Many imported car fuel filters use banjo fittings. In order to ensure the reliability of the connection seal, the same gasket must not be used repeatedly. In addition, even if a new gasket is used, the tightness of the connection must be checked. When the fuel system needs to replace the o-ring, it must be ensured that the o-ring specification is correct, and check whether the ring's elasticity and hardness are appropriate. The circuitless fuel system has only one internal filter (in the fuel tank), although this all-in-one pump, filter, and delivery unit are expensive, but when the fuel delivery is blocked or When the performance of the engine decreases, proper maintenance and maintenance must also be performed in time. At the same time, it is also necessary to check for faults in all fuel lines and breakage and crimping at hose clamps. Most automobile manufacturers recommend a replacement period of 48,000 km for the normal maintenance of their external filters. The recommended replacement period for conservative vehicle maintenance is between 1.92 and 24,000 km. If you are not sure, please read the owner's manual to find out the correct ones. Recommended replacement cycle. In addition, when the filter hose shows signs of aging or cracks caused by dirt such as dust and oil, it is necessary to replace the hose in time.
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Fuel filter structure and function
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