Oil mist separator

Abstract

An oil mist separator that is provided at a portion further up than a cylinder head in an internal combustion engine body, includes: an oil mist separating unit that separates oil mist contained in a blow-by gas that is generated from the internal combustion engine body, wherein the oil mist separating unit includes a first member that is arranged in a lower portion and has a partitioning wall shape, and a second member that is arranged above the first member, and includes a first blow-by gas inlet port which is provided at a position further up than the first member and through which the blow-by gas flows into the oil mist separating unit.

What is claimed is: 
     
         1 . An oil mist separator that is provided at a portion further up than a cylinder head in an internal combustion engine body, the separator comprising:
 an oil mist separating unit that separates oil mist contained in a blow-by gas that is generated from the internal combustion engine body,   wherein the oil mist separating unit includes a first member that is arranged in a lower portion and has a partitioning wall shape, and a second member that is arranged above the first member, and includes a first blow-by gas inlet port which is provided at a position further up than the first member and through which the blow-by gas flows into the oil mist separating unit.   
     
     
         2 . The oil mist separator according to  claim 1 ,
 wherein the first blow-by gas inlet ports are provided at multiple locations.   
     
     
         3 . The oil mist separator according to  claim 1 ,
 wherein the first blow-by gas inlet port is provided in a lower portion of a side portion of the second member.   
     
     
         4 . The oil mist separator according to  claim 1 ,
 wherein the second member includes a plurality of cyclone units, and a second blow-by gas inlet port through which the blow-by gas which has flowed through the first blow-by gas inlet port, flows into the plurality of cyclone units.   
     
     
         5 . The oil mist separator according to  claim 1 ,
 wherein the second member includes a cylinder head cover, and   wherein the first member includes a baffle plate that is arranged to separate the cylinder head cover from the cylinder head.   
     
     
         6 . The oil mist separator according to  claim 1 ,
 wherein the first blow-by gas inlet ports are provided over the whole circumference of an outer side surface of the second member.   
     
     
         7 . The oil mist separator according to  claim 4 ,
 wherein the second blow-by gas inlet port is arranged at a portion further up than the first blow-by gas inlet port, and the second member includes a gas passage that extends upward from the first blow-by gas inlet port to be connected to the second blow-by gas inlet port.   
     
     
         8 . The oil mist separator according to  claim 4 ,
 wherein the second member includes second blow-by gas inlet ports, the number of which is smaller than the number of the multiple locations where the first blow-by gas inlet ports are provided.   
     
     
         9 . The oil mist separator according to  claim 4 ,
 wherein the second member includes the cyclone unit; a separation structure including the first blow-by gas inlet port and the second blow-by gas inlet port; and a cover member that covers the separation structure and includes a discharge passage of the blow-by gas, and a space portion that is different from the discharge passage is provided between a side surface of the separation structure and the cover member.