Methods for Identifying Air Filters
Published Time:
2025-04-23
The service life and maintenance cycle of the air filter should be measured by the ratio of the gas flow rate through the filter element to the gas flow rate required by the engine. When the flow rate is greater than the required flow rate, the filter works normally; when the flow rate is equal to the required flow rate, the filter should be maintained; when the flow rate is less than the required flow rate, the filter cannot be used anymore, otherwise the engine's operating conditions will deteriorate. The situation will worsen, or even fail to work.
The working condition of the air filter and when it needs maintenance or replacement can be determined by the following methods:
Theoretically, the service life and maintenance cycle of the air filter should be measured by the ratio of the gas flow rate through the filter element to the gas flow rate required by the engine. When the flow rate is greater than the flow rate, the filter works normally; when the flow rate is equal to the flow rate, the filter should be maintained; when the flow rate is less than the flow rate, the filter can no longer be used, otherwise the working condition of the engine will deteriorate. The situation is getting worse, and it may even fail to work.
In actual operation, when the air filter element is blocked by suspended particles and cannot meet the airflow required by the engine, the engine operating state will show abnormalities, such as roaring, slow acceleration (insufficient intake air volume, insufficient cylinder pressure), weak work (over-rich mixture leading to incomplete combustion), relatively high water temperature (continued combustion during the exhaust stroke), and thicker smoke during accelerated exhaust. When these symptoms appear, it can be judged that the air filter is blocked, and the filter element should be removed for repair or replacement in time.
When maintaining the air filter element, pay attention to the color changes on the inner and outer surfaces of the filter element. After dust removal, the outer surface of the filter paper is clear and the inner surface is bright, and the filter element can continue to be used; if the outer surface of the filter paper loses its original color or the inner surface becomes dark, it must be replaced.
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