燃油滤清器分为三类：汽油滤清器、柴油滤清器和气体滤清器。它们的作用是滤除燃油中的固体杂物（氧化铁、灰尘等），防止燃油系统（特别是喷油嘴）堵塞，减少机械磨损，保证发动机稳定运行。此外，燃油滤清器还可以过滤水分，以减少燃油中的水分进入发动机，对发动机造成致命的损害。

汽油过滤器可用作化油器或 EFI 类型，如果安装在燃油管路中，则可用作外部过滤器。

对于带化油器的汽油发动机，汽油滤清器位于燃油泵的进口侧，工作压力较低，一般由塑料制成，而对于电喷发动机，汽油滤清器位于燃油泵的出口侧。燃油泵，工作压力较高，通常由金属或铝制成，但也有部分由塑料制成。有的由尼龙布、高分子材料等制成。

内部过滤器是安装在燃油泵和燃油箱内部的过滤器。燃油箱通常位于后排乘员脚部空间区域和后轴之间，可防止碰撞。燃油箱内装有一个电动燃油泵，它从燃油箱中吸取燃油，经过过滤器过滤，始终为发动机提供清洁的燃油。

燃油泵和燃油箱带有集成燃油滤清器。燃油蒸气通过两个翻转防漏阀引入活性炭过滤器。浮子式防翻漏阀具有保压功能，翻滚时可密封油箱，防止燃油泄漏。两个阀门通向油箱上部的膨胀室，并采用迷宫结构阻止液体燃料进入活性炭过滤器。膨胀室中的燃油通过燃油冷却产生的真空被泵入燃油箱。

柴油滤清器的结构与燃油滤清器大致相同，有可互换型和旋装型两种。但其工作压力和耐燃油耐温要求远低于燃油滤清器，而其过滤效率要求却远高于燃油滤清器。柴油滤清器的滤芯多采用滤纸制成，但也有毛毡或高分子材料制成。

柴油滤清器可分为油水分离器和柴油精滤器。

The important function of the fuel and water separator is to separate the water from the diesel fuel. The presence of water is extremely harmful to the diesel fuel supply system and can lead to rust, wear, seizure and even deterioration of the diesel fuel combustion process. Due to the high sulphur content of diesel in some countries, when combustion occurs, it will even react with water to produce sulphuric acid to corrode engine parts.

Diesel fine filters are used to filter the fine particles in diesel fuel. In recent years, with the increasing global environmental protection requirements for vehicle emissions, diesel engine filters need to use higher precision filter paper with a pore size of no higher than 3-5 microns.

Gas filters: These filters are mainly used for vehicles using gas as fuel and are available as high pressure, medium pressure and low pressure filters. They differ from ordinary fuel filters in that gas inevitably produces a range of impurities (including water, fuel, particles and rust spots) during the manufacturing and storage process.

1. The built-in gasoline filter housing is made of American Hostaform POM plastic housing, the tensile strength of POM physical properties of paraformaldehyde reaches 70MPa, water absorption is small, in the thermoplastic resin is a tough type, with high thermal strength, high wear resistance and excellent insulation properties.

2. The metal housing of the external fuel filter is made of high quality cold rolled sheet and is usually made of aluminium in order to be more environmentally friendly and light weight in European models.

3. The filter paper is made of Korean Ahlstrom high performance composite fibre material, which has superb mechanical properties, high strength and high elasticity. It has properties such as high temperature resistance, dimensional stability, low thermal shrinkage and high corrosion resistance. Another advantage of high performance fibres is their low density, which facilitates the lightweighting of products.

Testing equipment includes: fuel pulse tester, cycle tester, relaxation tester, etc.

1. The operation should be done carefully and cautiously, and the site should be kept away from fire so as not to start a fire.

2. When opening the fuel tank and taking out the cartridge assembly, you will feel that there is a small amount of gasoline volatilizing and leaking in the air. At this time, cover the mouth of the fuel tank with the cover plate, and after putting back the cartridge base, immediately seal the cover plate and fasten it with screws, and check whether there is any gasoline leaking and volatilizing, and ensure that it is safe before you can test the engine with the ignition.

3、更换滤芯的重点和难点是拆卸燃油泵总成的底座和盖，操作时应特别小心，防止操作不当损坏各部件。取出燃油泵和松开底座盖时，请勿用力过猛；用力撬动会损坏底座。

4.特别注意将燃油泵装入新的墨盒组件中，燃油泵泄压阀上的一个黑色小橡胶圈必须安装回载台上，而这个小橡胶圈往往留在拆下来的旧墨盒座上，如果忘记这一步，车子就不上油了，无法发动，很多人更换后无法启动发动机，就是因为没有把这个胶圈装回去。

1、外置燃油滤清器建议每10,000公里更换一次，内置燃油滤清器建议每40,000-80,000公里更换一次。

2、大保养时，燃油滤清器、机油滤清器、机油滤清器、空气滤清器、空调滤清器可同时更换。

3、燃油滤清器拆卸更换较复杂，建议不要自行更换，应由专业人员到专业地点进行更换。

为什么选择我们？

• 我们致力于为客户提供最好的汽车发动机系统解决方案。
• 我公司真诚希望与新老客户在互惠互利、友好合作的基础上建立良好的贸易关系。欢迎各单位来函来我公司指导。
• 我们利用我们的专业知识和资源为客户提供最佳的解决方案。
• 我们拥有一大批充满挑战高科技理念和创新敬业精神的新型人才。
• 我们的价格具有竞争力，且不影响质量或服务。
• 我们能够继续改进我们的服务并不断优化我们的燃油滤清器，以支持我们不断增长的客户群。
• 我们只使用最好的材料来制造我们的产品。
• 我们的核心价值观是客户至上、品质取胜、创新发展、和谐发展。
• 我们致力于为客户提供最高水平的服务和质量。
• 我们集生产、科研、服务于一体，设备精良，生产、检验流程齐全。

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