Oil filter shortcomings
Disadvantage 1: Only 60% of the impurities in the oil can be filtered out, and the filtration efficiency is low;
This is because the current oil filter relies on a single paper filter hole to intercept and filter out harmful impurities in the oil. The smaller the micropores of the filter paper, the better the filtration effect, but the worse the oil passing ability. In order to solve the problem that the smallest particles of impurities can be filtered out on the same filter paper micropores, it is also possible to supply a sufficient amount of engine oil to the micropores. According to the Filter Branch of the National Internal Combustion Engine Industry Association, the test method using the oil filter filter efficiency ISO4548 international standard test shows that even the best oil filter on the market can only be designed to filter 60% of the impurities in the oil. The ability, this is the maximum filtered value after thousands of experiments. In actual use, there are still 40% of harmful impurities, which cannot be effectively filtered by the paper filter. Among the 40% impurities, since the ferromagnetic impurities are relatively small and hard, the ferromagnetic impurities are mostly, and it is harmful to the engine. maximum.
Disadvantage 2: The filtration efficiency is zero under special conditions;
The existing oil filter has a bypass valve at the bottom of the paper filter. This is designed to ensure oil when the engine is in high viscosity or the paper filter is partially blocked or completely blocked. A direct oil flow channel designed to smoothly circulate back to the engine. When the oil opens the bypass valve under the pressure of the oil pump, the oil that is circulated back to the engine through the bypass valve can not only get the filter of the paper filter, but also the large particle impurities that have been filtered by the paper filter element. The bypass valve is re-run back into the engine to bring uninterrupted secondary wear to the engine. Therefore, the oil filter used in the market plays a filtering role under special conditions, so the filtration efficiency at this time is zero.