Oil filters mainly have the following types and characteristics:
Classification by Structure
Detachable Oil Filter
Structure: It is composed of a housing, a filter element, a sealing ring, etc. The housing can usually be disassembled, which is convenient for replacing the filter element.
Characteristics: It is convenient for maintenance. Users can open the housing by themselves to replace the filter element, and the cost is relatively low. However, its sealing performance is relatively poor. During the disassembly and installation process, if the operation is not proper, it is likely to lead to poor sealing and cause oil leakage.
Structure: It is composed of a housing, a filter element, a sealing ring, etc. The housing can usually be disassembled, which is convenient for replacing the filter element.
Characteristics: It is convenient for maintenance. Users can open the housing by themselves to replace the filter element, and the cost is relatively low. However, its sealing performance is relatively poor. During the disassembly and installation process, if the operation is not proper, it is likely to lead to poor sealing and cause oil leakage.
Integral Oil Filter
Structure: The filter element and the housing are made into an integral whole and cannot be disassembled.
Characteristics: It has good sealing performance and can effectively prevent oil leakage. The overall structure is compact, easy to install, and saves space. However, once the filter element is blocked, the entire filter needs to be replaced, and the cost is relatively high.
Structure: The filter element and the housing are made into an integral whole and cannot be disassembled.
Characteristics: It has good sealing performance and can effectively prevent oil leakage. The overall structure is compact, easy to install, and saves space. However, once the filter element is blocked, the entire filter needs to be replaced, and the cost is relatively high.
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Classification by Filtration Method
Full-flow Oil Filter
Working principle: When the engine is running, all the oil is filtered through the filter and then enters each lubricating part of the engine.
Characteristics: It can effectively filter the impurities in the oil, ensure the cleanliness of the oil, and provide good lubrication protection for the engine. The filtration accuracy is relatively high, and it can generally filter out impurities with a diameter of about 10 to 30 micrometers. However, it has a relatively large resistance to the flow of oil, and a relatively high oil pump pressure is required to ensure the normal circulation of the oil.
Working principle: When the engine is running, all the oil is filtered through the filter and then enters each lubricating part of the engine.
Characteristics: It can effectively filter the impurities in the oil, ensure the cleanliness of the oil, and provide good lubrication protection for the engine. The filtration accuracy is relatively high, and it can generally filter out impurities with a diameter of about 10 to 30 micrometers. However, it has a relatively large resistance to the flow of oil, and a relatively high oil pump pressure is required to ensure the normal circulation of the oil.
Shunt Oil Filter
Working principle: Only a part of the oil is filtered, usually a part of the oil output by the oil pump. This part of the oil is mixed with the unfiltered oil after being filtered by the filter and then enters the engine lubrication system together.
Characteristics: It has a relatively small resistance to the flow of oil and will not overly affect the circulation flow of the oil. A filter element with relatively high filtration accuracy can be used because there is no need to consider the passability of all the oil. However, it cannot finely filter all the oil, and the filtration effect is slightly worse than that of the full-flow filter.
Working principle: Only a part of the oil is filtered, usually a part of the oil output by the oil pump. This part of the oil is mixed with the unfiltered oil after being filtered by the filter and then enters the engine lubrication system together.
Characteristics: It has a relatively small resistance to the flow of oil and will not overly affect the circulation flow of the oil. A filter element with relatively high filtration accuracy can be used because there is no need to consider the passability of all the oil. However, it cannot finely filter all the oil, and the filtration effect is slightly worse than that of the full-flow filter.
Classification by Filter Element Material
Paper Filter Element Oil Filter
Material and structure: The filter element is made of microporous filter paper, and the filter paper is folded to increase the filtration area.
Characteristics: It has a high filtration accuracy and can effectively filter the tiny impurities in the oil. It can filter out particles with a diameter of about 5 to 20 micrometers. It has good air permeability and can ensure the normal flow of the oil. The cost is low, it is light in weight, and it is convenient to replace. However, the paper filter element is prone to getting damp, which may affect the filtration effect in a humid environment, and its service life is limited, so it needs to be replaced regularly.
Material and structure: The filter element is made of microporous filter paper, and the filter paper is folded to increase the filtration area.
Characteristics: It has a high filtration accuracy and can effectively filter the tiny impurities in the oil. It can filter out particles with a diameter of about 5 to 20 micrometers. It has good air permeability and can ensure the normal flow of the oil. The cost is low, it is light in weight, and it is convenient to replace. However, the paper filter element is prone to getting damp, which may affect the filtration effect in a humid environment, and its service life is limited, so it needs to be replaced regularly.
Metal Mesh Filter Element Oil Filter
Material and structure: It is woven from metal wire mesh and usually has a multi-layer structure to improve the filtration effect.
Characteristics: It has high strength, is not easy to be damaged, and can withstand a relatively high oil pressure. It can be reused. By cleaning the metal mesh, impurities can be removed, reducing the use cost. However, the filtration accuracy is relatively low. Generally, it can only filter out impurities with a relatively large diameter, and the filtration effect on tiny particles is not as good as that of the paper filter element.
Material and structure: It is woven from metal wire mesh and usually has a multi-layer structure to improve the filtration effect.
Characteristics: It has high strength, is not easy to be damaged, and can withstand a relatively high oil pressure. It can be reused. By cleaning the metal mesh, impurities can be removed, reducing the use cost. However, the filtration accuracy is relatively low. Generally, it can only filter out impurities with a relatively large diameter, and the filtration effect on tiny particles is not as good as that of the paper filter element.
Composite Material Filter Element Oil Filter
Material and structure: It is composed of multiple materials combined, such as adding materials like activated carbon and fibers on the basis of the paper filter element, or using a combination of filter layers of different materials.
Characteristics: It combines the advantages of multiple materials. It can not only improve the filtration accuracy but also enhance the adsorption performance of the filter, effectively removing impurities, moisture, and harmful substances in the oil. It has good durability and anti-aging performance. However, the manufacturing process is relatively complex, and the cost is relatively high.
Material and structure: It is composed of multiple materials combined, such as adding materials like activated carbon and fibers on the basis of the paper filter element, or using a combination of filter layers of different materials.
Characteristics: It combines the advantages of multiple materials. It can not only improve the filtration accuracy but also enhance the adsorption performance of the filter, effectively removing impurities, moisture, and harmful substances in the oil. It has good durability and anti-aging performance. However, the manufacturing process is relatively complex, and the cost is relatively high.
Post time: Apr-08-2025