Air Filters
The air filter is an important component in the intake system of an internal combustion engine. It is mainly used to filter dust, sand, pollen and other impurities in the air to ensure that clean air enters the combustion chamber, thereby protecting the internal parts of the engine and maintaining its efficient operation.
1.Filter impurities in the air; prevent dust, sand and other particles from entering the engine cylinder, and avoid abnormal wear of components such as pistons and cylinder walls.
2.Optimize combustion efficiency; clean air and fuel are mixed fully to improve combustion efficiency and reduce carbon deposits.
3.Extend engine life; reduce the erosion of impurities in the internal engine parts and reduce mechanical losses.
4.Protect sensors; prevent pollutants from damaging precision components such as air flow sensors and throttle.
Main functions
1. Paper air-filter
- The most common type. Using fiber paper to filter air; low cost and easy replacement.
- Cannot be washed and needs to be replaced regularly.
- Suitable for most family cars.
2. Oil air-filter
- The Oil bath filter with high filtration efficiency absorbs dust particles through the oil film.
- It needs to be cleaned and replenished with special oil regularly.
- It is commonly found in old vehicles or construction machinery.
3. High-performance filter
- It is made of cotton or synthetic fiber materials and can be washed and used repeatedly.
- It has low intake resistance and is suitable for modified vehicles or high-performance engines.
The replacement of the air filter mainly depends on the driving environment;
- Ordinary urban roads; Replace every 15,000 to 30,000 kilometers or once a year.
- Dusty/harsh environment (such as sandy land, construction site); Check or replace every 5,000 to 10,000 kilometers.
- Washable filter;Replaced after every 3-5 cleanings (refer to the description for details).
Note; If the filter element is obviously blackened, damaged or the intake resistance increases, it should be replaced immediately.
1. Filter element blockage;
- faults; engine power decreases, fuel consumption increases, and acceleration is weak.
- Cause; excessive dust has accumulated due to long-term non-replacement.
2. Filter element damage;
- faults; abnormal engine noise; intake system warning light on.
- Cause; inferior filter element or improper installation causes tearing.
3. Poor seal;
-faults; unfiltered air directly enters the engine accelerating part wear.
- Cause; deformation of the filter housing or aging of the sealing.
1. Select filter element according to the environment
- It is recommended to shorten the replacement or use high-performance filters in dusty areas.
2. Avoid using inferior products
- Inferior filter elements with low filtration efficiency may damage the engine.
3. Regular inspection
- Check the filter element status every 5,000 kilometers and tap to remove surface dust (dry filter element only).
4. Installation specification
- Ensure that the filter element and the housing are completely sealed to prevent unfiltered air from bypassing.
5. Refitting
- The high-flow filter modification needs to match the ECU adjustment, otherwise it may affect the air-fuel ratio.
The air filter is the "first line of defense" of the engine, and its status directly affects the power, fuel consumption and emission performance. Regular maintenance and replacement can not only reduce maintenance costs, but also extend the service life of the engine, which is a key part of daily maintenance.
Types
Maintenance and replacement
Common faults
Notes
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