JPS63123712U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a schematic front view of a V-type internal combustion engine with main parts cut away, Figure 2 is a schematic plan view showing the lubricating oil supply structure to the left camshaft, and Figure 3 is a cross section taken along the line shown in Figure 2. FIG. 4 is a longitudinal sectional view of the left camshaft supporting portion, and FIG. 5 is a longitudinal sectional view of the right camshaft supporting portion. In addition, in the drawing, 10 is a cylinder block, 11 is a cylinder head, 16 is a bearing surface, 17 is an oil passage,
21, 31 are valves, 41 is a camshaft, 42 is a cam, 4
3 is a journal part, 51 is a cam holder, 52 is a bearing surface, 53, 54 are oil passages, 55 is an oil filler port, 56
is an oil groove, 61 is a connecting beam, 62 is an oil passage, 63
is the fuel filler port, and V is the V bank.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A camshaft is rotatably supported between a cam holder screwed onto the cylinder head of an internal combustion engine and the cylinder head, and the cam shaft is pressed against the bearing surface of the cam holder by the lift action of a valve. In a camshaft lubrication structure for a valve train in which an oil supply port is formed on the surface of the camshaft at a position where the camshaft is pressed against the bearing surface by the lift action and opens at a position before it comes into sliding contact, lubricating oil from the cylinder head enters the cam holder. An oil passage to be guided and an oil passage communicating with the oil filler port are both opened on the upper surface thereof and formed on one side and the other side of the bearing surface, respectively, and a connecting beam that interconnects each cam holder is provided on the cam holder. A camshaft lubrication structure for a valve train, characterized in that the camshaft lubrication structure is screwed onto the upper surface of the connecting beam, and an oil groove is formed in the mating surface of the lower surface of the connecting beam and the upper surface of the cam holder to communicate the oil passages. (2) In claim 1 of the utility model registration claim, both the oil passages and the oil groove are installed in a V-type internal combustion engine.
A camshaft lubrication structure for a valve train characterized by providing only the valve train on one side of the bank. (3) A cam for a valve train according to claim 1 of the utility model registration claim, characterized in that the connecting beam has an oil passage and an oil supply port is provided at a portion corresponding to each cam of the camshaft. Shaft lubrication structure.