Cylinder head cover breathing system

Abstract

The present utility model discloses a cylinder head cover breathing system, comprising: a cylinder cover body, a breathing plate and an oil return plate, wherein the cylinder cover body and the breathing plate are fixed to form a precipitating cavity; the breathing plate and the oil return plate are fixed to form an oil return cavity and an air inlet passage; the air inlet passage is communicated with the precipitating cavity; the precipitating cavity is communicated with the oil return cavity; an oil return hole is formed in the oil return cavity; and the precipitating cavity is communicated with the atmosphere. The cylinder head cover breathing system provided by the present utility model can be freely turned over without a phenomenon of lubricating oil burning ejection.

What is claimed is: 
     
         1 . A cylinder head cover breathing system, comprising: a cylinder cover body, a breathing plate and an oil return plate, wherein the cylinder cover body and the breathing plate are fixed to form a precipitating cavity; the breathing plate and the oil return plate are fixed to form an oil return cavity and an air inlet passage; the air inlet passage is communicated with the precipitating cavity; the precipitating cavity is communicated with the oil return cavity; an oil return hole is formed in the oil return cavity; and the precipitating cavity is communicated with the atmosphere. 
     
     
         2 . The cylinder head cover breathing system of  claim 1 , wherein an air outlet hole communicated with the atmosphere is formed in the cylinder cover body. 
     
     
         3 . The cylinder head cover breathing system of  claim 1 , wherein an oil dripping hole and an oil dripping column are arranged on the breathing plate; and the oil dripping column is provided with a penetrating hole. 
     
     
         4 . The cylinder head cover breathing system of  claim 1 , wherein an oil return groove and an oil return hole communicated with the oil return groove are formed in the oil return plate. 
     
     
         5 . The cylinder head cover breathing system of  claim 1 , wherein a buffer mechanism is arranged in the precipitating cavity to buffer a flow speed of oil gas. 
     
     
         6 . The cylinder head cover breathing system of  claim 5 , wherein the buffer mechanism is a rubber pad. 
     
     
         7 . The cylinder head cover breathing system of  claim 5 , wherein the buffer mechanism is in a form of a labyrinth.