What types of filters are mainly used in the maintenance of small passenger vehicles?

Oil filter

The oil filter is located in the engine lubrication system. Its upstream is the oil pump, and its downstream are the various components in the engine that need lubrication. Its function is to filter out harmful impurities in the engine oil from the oil pan, and supply clean engine oil to the crankshaft, connecting rod, camshaft, turbocharger, piston rings and other moving pairs, playing a role in lubrication, cooling and cleaning, thereby extending the service life of these components.

Fuel filter

The fuel filter is connected in series on the pipeline between the fuel pump and the oil inlet of the throttle valve body.
Its function is to filter out harmful particles and moisture in the engine's fuel and gas system to protect the fuel pump, nozzle, cylinder liner, piston rings, etc., reduce wear and avoid blockage. Filter out the iron oxide contained in the fuel.
The fuel filter is connected in series on the pipeline between the fuel pump and the oil inlet of the throttle valve body.

Air filter

The air filter is designed to prevent dust from entering the engine and avoid premature wear of the engine
Its shapes can be flat, round, oval or flat. The filter material is filter paper or nonwoven fabric. The end covers of the filter element are made of metal or polyurethane
Air conditioning filter

The air conditioning filter

Commonly known as the pollen filter, serves the following functions: Filtering the air entering the cabin from the outside improves the cleanliness of the air. Generally, the filtering substances refer to impurities, fine particles, pollen, bacteria, industrial waste gas and dust contained in the air. The effect of the air conditioning filter is to prevent such substances from entering the air conditioning system and damaging it, providing a good air environment for the passengers in the vehicle and protecting their health. Another point is to prevent the glass from fogging up.