What is the function of the car’s four filter

We usually refer to the air filter, fuel filter, oil filter, and air conditioning filter collectively as the four filters. Since they play a filtering role, they should be replaced if they are dirty. Many cars are maintained every 7,500 kilometers, and the maintenance staff will recommend us to replace them every time they are maintained.
(1) The oil filter is located in the engine lubrication system. Its upstream is the oil pump, and downstream is the parts that need to be lubricated in the engine. Its function is to filter out harmful impurities in the oil from the oil pan, and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other motion pairs with clean oil to play the role of lubrication, cooling and cleaning, thereby Extend the life of these parts.
(2) Fuel filters are divided into carburetor and electronic injection. For gasoline engines using carburetor, the fuel filter is located on the inlet side of the fuel transfer pump, and the working pressure is relatively small. Generally, nylon shells are used. The fuel filter of the engine is located on the outlet side of the fuel transfer pump, and the working pressure is relatively high, usually using a metal casing.
(3) The air filter is located in the engine’s air intake system. It is an assembly composed of one or several clean air filter components. Its main function is to filter out harmful impurities in the air that will enter the cylinder to reduce the early wear of the cylinder, piston, piston ring, valve and valve seat.
(4) The air conditioning filter is used to filter the air in the car compartment and the air circulation inside and outside the car compartment. Remove the air in the cabin or the dust, impurities, smoke odor, pollen, etc. in the air entering the cabin to ensure the health of passengers and remove the peculiar smell in the cabin. At the same time, the air-conditioning filter also makes the windshield not easy to fog .
Replacement cycle:
The replacement cycle of the oil filter is generally 5000 kilometers
The fuel filter replacement cycle is generally 10,000 kilometers
The replacement cycle of the air filter is generally 10,000 kilometers
The replacement cycle of the air conditioner filter is generally 20,000 kilometers
Precautions for replacement
1. After replacing and installing the gasoline filter and the oil filter, pay attention to the sealing of the interface and be alert for oil leakage;
2. For air filters and air conditioning filters, ensure the overall sealing after replacement;
3. Take good care of the gasoline filter and try to use the matching mark gasoline specified by the automobile manufacturer.

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