Fuel filter 06L115562 for Audi

Function

Protecting engine components: It can filter out harmful particles and water in the engine fuel system, preventing iron oxide, dust, and other solid debris from entering, protecting the oil pump, oil nozzle, cylinder liner, piston ring, etc., reducing mechanical wear, and avoiding performance issues due to blockage.

Ensuring fuel purity: It makes the fuel entering the engine for combustion cleaner, allowing for more complete combustion, reducing carbon buildup, improving engine power output and stability, and also helping to reduce harmful substances in exhaust emissions.

Working principle

Gasoline filter: For carburetor-type gasoline engines, the gasoline output from the fuel pump enters the housing via the oil pipe, is filtered through the filter element, enters the filter element cavity, and is then delivered to the carburetor via the outlet pipe. For electronic fuel injection engines, the gasoline is drawn from the fuel tank by the fuel pump, pressurized to approximately 0.3 MPa, and then impurities and water are removed by the filter before being sent to the fuel distribution pipe and then injected into the intake pipe by the injector. Excess fuel is recycled back to the fuel tank via the return pipe.

Diesel filter: The diesel fuel first enters a diesel water separator, where water is separated using sedimentation and filtration. Then, the fuel passes through a diesel fine filter to remove small particles, providing clean diesel fuel to the engine.

Structural components

Housing: Usually made of aluminum alloy, iron, or plastic, it protects the internal filter element and other components. The material and shape of the housing vary depending on the type of fuel filter.

Filter element: This is the core component of the fuel filter and is primarily used to filter impurities from the fuel. Common filter element materials include paper, chemical fiber, ceramic, and stainless steel. Filter elements of different materials differ in filtration efficiency and service life.

Inlet and outlet: These are used to connect the fuel lines, allowing fuel to smoothly enter the filter for filtration and then to be delivered to the engine or other components.

Other components: These may include sealing gaskets, springs, dust covers, and sediment cups. Sealing gaskets prevent fuel leakage, springs secure the filter element, dust covers prevent dust and other impurities from entering the filter, and sediment cups collect water and heavier impurities from the fuel.