Oil filter apparatus

Abstract

The invention relates to an oil filter apparatus comprising an oil inlet and an oil outlet, with a suction oil pump being connectable to the oil outlet with which a negative pressure can be produced between the oil inlet (and the oil outlet, a coarse filter medium and a fine filter medium which is arranged between the oil inlet and the oil outlet, with the oil filter apparatus being capable of allowing a volume share of the oil to pass permanently through the coarse filter medium irrespective of the viscosity of an oil passing through the oil inlet and of allowing at the same time the remaining volume share of the oil to pass through the fine filter medium. The entire oil volume flow can thus be purified in a short period of time with high efficiency, and no additional space is required outside of the transmission or engine, a light and cost-effective configuration is achieved, and the oil filter apparatus can be used in different vehicle models or types of engines without any change and thus without any reduction in the variety of variants.

1 . An oil filter apparatus, comprising: an oil inlet and an oil outlet, with a suction oil pump being connectable to the oil outlet with which a negative pressure can be produced between the oil inlet and the oil outlet; a coarse filter media and a fine filter media which is arranged between the oil inlet and the oil outlet; wherein the oil filter apparatus is capable of allowing a volume share of the oil to pass permanently through the coarse filter media irrespective of the viscosity of an oil passing through the oil inlet and of allowing at the same time the remaining volume share of the oil to pass through the fine filter media. 
     
     
         2 . An oil filter apparatus according to  claim 1 , wherein the fine filter media is arranged before the coarse filter media in the direction of flow. 
     
     
         3 . An oil filter apparatus according to  claim 1 , wherein the fine filter media is provided with at least one permanent opening through which oil can pass in an unfiltered manner. 
     
     
         4 . An oil filter apparatus according to  claim 1 , wherein in the case of high viscosity of the oil the volume share of the oil passing through the at least one permanent opening of the fine filter media to the coarse filter media is approximately 90 to 95% of the entire oil volume flow passing through the oil filter apparatus. 
     
     
         5 . An oil filter apparatus according to  claim 1 , wherein during low viscosity of the oil the volume share of the oil passing through the coarse filter media is at most 50% of the entire oil volume flow passing through the oil filter apparatus. 
     
     
         6 . An oil filter apparatus according to  claim 1 , wherein the fine filter media is glass-fiber mat, a plastic mat, a cellulose mat or a fine-wire fabric. 
     
     
         7 . An oil filter apparatus according to  claim 1 , wherein the coarse filter media is metal fabric or a plastic fabric. 
     
     
         8 . An oil filter apparatus according to  claim 1 , wherein the oil filter apparatus comprises a top filter shell and a bottom filter shell, with the top filter shell comprising at least one spacer towards the coarse filter media. 
     
     
         9 . An oil filter apparatus according to  claim 8 , wherein the bottom filter shell is provided with at least one spacer. 
     
     
         10 . An oil filter apparatus according to  claim 1 , wherein at least one spacer is provided between the coarse filter media and the fine filter media. 
     
     
         11 . An oil filter apparatus according to  claim 10 , wherein the spacer comprises glass-fiber-reinforced plastic, especially PA66GF30-35, or metal wire fabric or extruded plastic fabric. 
     
     
         12 . An oil filter apparatus according to  claim 8 , wherein a ratio of the heights of the top filter shell to the spacer between the coarse filter media and the fine filter media to the bottom filter shell is approximately equal to 42:3 8:20. 
     
     
         13 . An oil filter apparatus according to  claim 10 , wherein a free end or the free ends of a spacer is or are provided with a radius. 
     
     
         14 . An oil filter apparatus according to  claim 8 , wherein the top filter shell comprises plastic and the bottom filter shell comprises metal, or vice-versa. 
     
     
         15 . An oil filter apparatus according to  claim 8 , wherein the top filter shell comprises PA66GV30-35. 
     
     
         16 . An oil filter apparatus according to  claim 1 , wherein a hydraulic cross section of the oil inlet is larger by at least the factor 1.5 than a hydraulic cross section of the oil outlet. 
     
     
         17 . An oil pan with an oil filter apparatus according to  claim 1 .