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May 19, 2022
The working condition of the air filter and when it needs to be maintained or replaced can be identified by the following methods:
In theory, air filter life and maintenance intervals should be measured as the ratio of the gas flow rate to the filter element to the gas flow 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 conditions of the engine will become more and more It's getting worse and can't even work.
In actual work, when the filter element of the air filter is blocked by suspended particles and cannot meet the air flow required for the engine to work, the working state of the engine will be abnormal: for example, the roar is dull, and the acceleration is slow (insufficient intake air Insufficient cylinder pressure); weak work (incomplete combustion due to too rich mixture); relatively high water temperature (combustion continues when entering the exhaust stroke); and exhaust smoke becomes richer when accelerating.
When these symptoms appear, it can be judged that the air filter is blocked, and the filter element should be removed in time for maintenance or replacement. When maintaining the air filter element, pay attention to the color change of the inner and outer surfaces of the filter element. After removing the dust, if the outer surface of the filter paper is clear and the inner surface is bright, the filter element can continue to be used; if the outer surface of the filter paper has lost its natural color or the inner surface is dark, it must be replaced!