| 摘要 |
PROBLEM TO BE SOLVED: To suppress the insufficiency of heating of a PCV valve by oil for freezing suppression.SOLUTION: Between a buffle plate 5 attached to a lower side back surface of a head cover provided with a PCV valve and an oil passage forming plate 6 bonded with a lower surface of the buffle plate 5, a horizontal oil path 8 dropping and supplying a lubrication oil to a valve system of an engine is formed. The buffle plate 5 is formed with a recessed part 12 communicated with the horizontal oil path 8, and depressed upward toward the PCV valve. On the other hand, the oil passage forming plate 6 is formed with a partitioning wall 13 projected upward and inserted in the recessed part 12 to turn a flow of the oil in the horizontal oil path 8 upward and guide the oil close to the PCV valve. On a wall surface 13a positioned on an upstream side of the horizontal oil path 8 on the partitioning wall 13, at both end parts in a width direction of the partitioning wall 13, ribs 15 projecting out from the wall surface 13a are formed over the whole in a projecting direction of the partitioning wall 13.SELECTED DRAWING: Figure 6 |
