Fuel filter 31726-28X0A for Nissan

Function

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

Ensuring fuel purity: Makes the fuel entering the engine for combustion cleaner, allowing for more complete combustion, reducing carbon deposits, 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, gasoline from the fuel pump enters the housing via a fuel 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, gasoline is drawn from the fuel tank by the fuel pump, pressurized to approximately 0.3 MPa, impurities and water are removed by the filter, and sent to the fuel distribution pipe, then injected into the intake pipe by the fuel injector. Excess fuel is returned to the fuel tank via the return pipe.

Diesel filter: Diesel fuel first enters the 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 to the engine.

Structural Composition

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

Filter element: The core component of the fuel filter, mainly 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: Used to connect the fuel lines, allowing fuel to smoothly enter the filter for filtration and delivering the filtered fuel to the engine or other components.

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