Have you ever heard of a filter? Simply put, it is an accessory that filters impurities and gases. It is mainly used in the engine of a car. We understand a product not only to understand its advantages, but also to understand Its shortcomings, the following editor has sorted out two shortcomings of the filter for everyone.
Disadvantage 1: Filter out 60% of impurities in the oil, low filtration efficiency;
This is because the existing oil filter relies on a single paper filter hole to intercept and filter out harmful impurities in the oil. The smaller the filter paper, the better the filtering effect, but the worse the oil passing capacity. In order to solve the contradiction that the smallest particles of impurities can be filtered out on the same filter paper micropores, a sufficient amount of engine oil can also be supplied to the engine through the micropores. According to the filter branch of the National Internal Combustion Engine Industry Association, the best oil filter on the market can only be designed to filter out 60% of the impurities in the oil. This is the maximum filtration value obtained after thousands of experiments. In actual use, there are still 40% of harmful impurities that cannot be effectively filtered by the paper filter. Among these 40% impurities, because ferromagnetic impurities are relatively small and hard, ferromagnetic impurities are mostly used, which will damage the engine. maximum.
Disadvantage 2: The filtration efficiency is zero under special conditions;
There is a bypass valve at the bottom of the paper filter element. This is designed to ensure that the oil can be smoothly circulated back to the engine when the engine oil viscosity is high at cold start or the paper filter element is partially or completely blocked. Oil flow channel. When the oil opens the bypass valve under the pressure of the oil pump, the oil circulating back to the engine through the bypass valve will not only not be filtered by the paper filter element, but also the large particles of impurities that have been filtered out by the paper filter element. It rushes back to the engine through the bypass valve, causing uninterrupted secondary wear to the engine. From the above two shortcomings, it can be seen that there is no permanent filtering effect on impurities larger or smaller than the pores of the paper filter element. It can only permanently filter the impurities that are equal to the pores of the paper filter element and embedded in the pores of the paper filter element. The filtering effect of, so the filtering efficiency is extremely low.
