| 摘要 |
PURPOSE:To enable the oil feeding suitable for the operation term by providing a reciprocating type oiling pump and a driving means thereof in an engine piston, and providing a lubricating oil feeding device to the oiling pump in the lower part of a cylinder liner. CONSTITUTION:When an engine piston 50 lowers down, the lower end of an oil pump rod 61 integral with a pump piston 68 in a reciprocating type oiling pump provided in the piston 50 abuts to the upper end of a thrust-up rod 71 to raise the pump piston 68, resisting to a coil spring 63. At the time of abutting, oil feeding hole cut-off plungers 51, 91 built-in the opposite part of the oil pump 61 and the thrust-up rod 71 are respectively backed, resisting to springs 82, 92, and respective oil feeding holes 84, 94 are communicated with oil feeding holes 86, 96 formed in the oil pump rod 61 and the thrust-up rod 71, and the lubricating oil fed to a lead pipe 40 is fed to an oil pump chamber 62. The lubricating oil in the oil pump chamber 62 is discharged from a discharge hole 65 when the pump piston 68 lowers down, attending on the rise of the piston 50. |
