Filter development and application: Before the 1980s, the oil filters used in the national engines were mostly interchangeable. The filter of this structure is to put the filter element and other parts, such as a spring, a sealing ring and the like into a metal casing, and connect the casing filter element and the like to a metal filter seat through a tie rod. It has the advantage of low cost of use and only requires regular maintenance and replacement of the filter element. The shortcoming is that there are too many sealing points, and the maintenance and replacement of the filter element may leak parts, which is easy to cause loopholes, and the replacement is troublesome.
Since the early 1980s, the èšŒåŸ filter plant has been the first in China to introduce a spin-on filter production line from Italy. The spin-on filter has been gradually approved for domestic OEMs. The filter is characterized by a check valve, a bypass valve and only one sealing point, which is completely replaced, which greatly improves the sealing property and is easy to replace. The filter material is mostly imported filter paper, so the filtering efficiency is high. The flow resistance is small and the life is long. All domestic cars use this type of oil filter. Most of the mini-cars, as well as large, medium and small passenger cars, light and medium-duty trucks, and some heavy-duty trucks and agricultural vehicles, use spin-on oil. Filter.
The oil filter is located in the engine lubrication system. Its upstream is the oil pump, and downstream is the parts of the engine that need lubrication. The function is to filter harmful impurities in the oil from the oil sump, and supply the lubricating oil to the motion pair such as the crankshaft, the connecting rod, the camshaft, the supercharger and the piston ring to play the role of lubrication, cooling and cleaning. To extend the life of these components, the oil filter is divided into a removable, spin-on, and centrifugal type according to the structure; it can be divided into full-flow and split-flow according to the arrangement in the system. The filter materials used in the oil filter are filter paper, felt, metal mesh, nonwoven fabric, and the like.