The engine has air, oil, fuel three filters, the car has air conditioning filters are generally called "four filters."They are responsible for the filtration of engine inlet system, lubrication system, combustion system and cooling system.
The oil filter is located in the engine lubrication system.Its upstream is the oil pump, downstream is the engine in need of lubrication parts.Its function is to filter out the harmful impurities in the oil from the oil sump, and supply the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving pairs with clean oil to lubricate, cool and clean, thus extending the life of these parts.
Fuel filter is divided into carburetor and electric injection type, gasoline engine of carburetor is used, fuel filter is located on the inlet side of the oil transfer pump, the working pressure is lower, generally using nylon shell, fuel filter of electric injection engine is located on the outlet side of the oil transfer pump, the working pressure is higher, usually using metal shell.
Automotive air filters are located in the engine intake system and are an assembly of one or more 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 cylinder, piston, piston ring, valve and valve seat.
The air conditioner filter is used to filter the air inside and outside the car.Remove the air inside the car or into the car in the air of dust, impurities, smoke smell, pollen, to ensure the health of passengers and remove the smell inside the car, at the same time air conditioning filter also has the role of making windshield not easy to atomize.