Oil flow passage structure of cylinder block

Abstract

Disclosed is oil flow passage formation in a cylinder block 11 from an oil pump 12 to an oil cooler 13 , having a side surface of the cylinder block 11 on which the oil pump 12 is formed, and an oil flow passage 14 formed in and along the side surface of the cylinder block 11 on which the oil pump 12 is formed. This makes it unnecessary to change the flow direction of the engine oil and suppresses increase in resistance of the engine oil to cause the engine oil to flow smoothly.

1 . Oil flow passage formation in a cylinder block from an oil pump to an oil cooler, comprising an side surface of the cylinder block on which the oil pump is formed, and an oil flow passage formed in and along the side surface of the cylinder block on which the oil pump is formed. 
   
   
       2 . Oil flow passage formation in a cylinder block as claimed in  claim 1 , wherein the oil cooler is arranged at an upper portion of the cylinder block. 
   
   
       3 . Oil flow passage formation in a cylinder block as claimed in  claim 1 , wherein a discharge port from the oil pump to the oil flow passage is oriented to a discharge direction by drive means of the oil pump. 
   
   
       4 . Oil flow passage formation in a cylinder block as claimed in  claim 2 , wherein a discharge port from the oil pump to the oil flow passage is oriented to a discharge direction by drive means of the oil pump.