Friction-reducing lubricating-oil filter for internal combustion engine

A friction-reducing lubricating-oil filter, for use with a solid lubricant, comprising:

• a housing having an oil inlet and an oil outlet and defining a housing interior and means for establishing an oil flow path between the oil inlet and oil outlet;
• a filter element mounted within the housing along the oil flow path;
• a solid-lubricant-feeding means arranged in the housing interior along the flow path between the filter element and the oil outlet including:
• two concentric sleeves and in which a ring space is formed by the exterior surface of the inner sleeve and the interior surface of the outer sleeve and is filled with the solid lubricant;
• upper and lower end plates used to cover and seal two ends of said ring space;
• several holes evenly arranged on the lower end plate;
• a semicircular duct fixed on the surface of the lower end plate outside the ring space, which covers on and is communicated with each said hole and is also communicated with another lower sleeve which is connected with the lower end of the inner sleeve and extends through the lower end plate;
• a circular lower plate used to cover and seal the lower end of said lower sleeve;
• whereby when the filtered lubricating-oil flows into the solid-lubricant-feeding means, and passes through the semicircular duct and enters the lower sleeve, the solid lubricant in the sold-lubricant-feeding means is drawn out through said holes and mixes with the lubricating-oil because the static pressure of the flowing liquid is lower in the area adjacent said holes, the lubricating-oil with the solid lubricant then flows through the inner sleeve, and finally passes through the oil outlet of the filter.