What is the "three filters" of a car?

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Most old drivers know what "three filters" are, but many novice car owners may not know or care. Occasionally, they may hear the word "three filters" from other car owners or in the process of maintaining their cars. What is the "three filters" of a car? What's the use? How often do you change it?

Let's talk about the topic of "three filters", hoping to help you maintain a car reasonably.

What is the "three filters" of a car?

"Three filters" is a long-standing synonym in the industry, representing three commonly used automobile parts, namely, oil filter, gasoline filter and air filter.

They are responsible for the filtration of media in lubrication system, combustion system and engine intake system respectively. To put it bluntly, the wheel valley is equivalent to the mask and filter screen of the car.

Because car owners usually need to repair or replace these three kinds of accessories at the same time when maintaining their cars, it is synonymous with "three filters".

What are the functions of automobile "three filters"?

Automobile "three filters" refer to oil filter, gasoline filter and air filter. Their function, as the name implies, is to filter and purify any liquid and gas entering the automobile engine, thus protecting the engine and improving its working efficiency.

Let's talk about their respective functions and replacement cycles first.

oil filter

Filter harmful impurities in engine oil.

Oil filter, also known as mechanical filter, is located in the engine lubrication system. Upstream of the mechanical filter is the oil pump, and downstream is the parts of the engine that need lubrication.

The machine filter filters out the harmful impurities in the engine oil from the oil pan, and supplies clean engine oil to the crankshaft, connecting rod, camshaft, supercharger, piston ring and other moving pairs, which plays the role of lubrication, cooling and cleaning, thus prolonging the service life of these parts.

It is generally recommended to change it every 5,000 km /6 months.

Some friends may drive less, and they may only drive 3000 kilometers in half a year, but at this time, the validity period of the oil has come, and it is time to change the oil. Usually we will replace it with the oil filter.

In most cases, the service life of our engine oil filter is 5000 kilometers, which is aimed at new engine oil.

In most cases, the machine filter is replaced every 5,000 kilometers, but if it is less than 5,000 kilometers, as long as the oil is changed, the machine filter is generally replaced together. The price of a machine filter is only ten or twenty dollars, so we don't feel bad about changing it more.

But for some cars with long-lasting engine oil, you can also choose some long-lasting machine filters, but the price will be slightly more expensive.

gasoline filter

Filter out impurities in gasoline.

Gasoline filter is called steam filter for short. The gasoline filter of EFI engine is located at the outlet side of the oil transfer pump, which has high working pressure and usually adopts a metal shell.

Filter elements of gasoline filters mostly use filter paper, and some use nylon cloth and polymer materials. The main function of gasoline filter is to filter out impurities in gasoline.

It is generally recommended to replace it every 30,000-40,000 kilometers.

It is generally recommended to replace the gasoline filter every 30,000-40,000 kilometers. The specific replacement cycle is subject to the actual working conditions of the vehicle and its own maintenance manual. For example, if the oil circuit is not smooth, it should be replaced.

Air filter

The main components of air filter are filter element and shell, in which the filter element is the main filtering component, which is equivalent to the mask of automobile, and the shell is the external structure that provides necessary protection for the filter element.

Filter dust and sand in the air.

When the engine is working, it will inhale a lot of air. If the air is not filtered, the dust suspended in the air will be sucked into the cylinder, which will accelerate the wear of the piston group and cylinder.

Larger particles entering between the piston and the cylinder will cause a serious "cylinder pulling" phenomenon, which is especially serious in a dry and sandy working environment.

The air filter is installed in front of the carburetor or intake pipe to filter out dust and sand in the air and ensure enough clean air to enter the cylinder.

It is generally recommended to replace it every 10000 km /6 months.

Generally speaking, 65,438+00,000 km /6 months should be replaced once, one at a time.

Of course, the maintenance cycle of different brands is not exactly the same, and the specific replacement cycle is arranged according to the requirements of automobile manufacturers and their own use and environment.

For example, when the smog is serious, it is best to change cars every three months.

abstract

Timely cleaning and maintenance of "three filters" can comprehensively improve engine performance, reduce engine failure rate and prolong engine service life.

Mechanical oil filter: It is generally recommended to replace it every 5,000 km /6 months.

Gasoline filter: It is generally recommended to replace it every 30,000-40,000 kilometers.

Air filter: It is generally recommended to replace it every 10000 km /6 months.

The general replacement time of the three filters is given above, but the maintenance cycle of different brands is not exactly the same. The specific replacement cycle is arranged according to the requirements of automobile manufacturers, their own use and environment.