| 摘要 |
PURPOSE:To improve the returning of oil at high speed rotary operation, by utilizing pulsating pressure generated in a crank chamber to circulate air and forcibly returning oil through this circulative air flow to the crank chamber and onto a partitioning plate. CONSTITUTION:A partitioning plate 20 is provided between a crank chamber 3 and oil pan 7 in a crank case 1 to separate both the chamber and the oil pan, then the case 1 can be closed by the plate 20 to apply back pressure of a piston 6 fully to said chamber 3. In consequence, vertically reciprocating motion of the piston 6 causes pressure in the chamber 3 to largely change resulting in the remarkable generation of positive and negative pulsating pressure. Accordingly, at operation, a check valve 22 is opened by positive pressure of pulsating air in the chamber 3 to discharge air to a rocker chamber 13 via a passage 27 simultaneously a check valve 30 in a side of the plate 20 is also opened to discharge the air to the oil pan 7. Reversely at negative pulsating pressure, another check valve 24 is opened to suck air from the chamber 13 and forcibly return a large amount of oil. |
