| 摘要 |
PURPOSE:To prevent a rotational portion from being immersed in oil by, in a dry sump lubrication mechanism, having the lower part of a crankcase communicate with the upper part of a reserve-tank and connection lubricant-pump- suction-openings with both and changing the connections with the suction- openings depending on the condition of stagnation. CONSTITUTION:In an oil tank 5 fixed to a crankcase 2, baffle plates 6, 7 are provided in such a manner that they go around so as to miss the rotational locus of a crankshaft 4 and a space between the two becomes almost paralleled. A reverse-tank 8 and a crank chamber 9 are formed by both baffle plates 6, 7, and the upper part of the reserve-tank 8 and the lower part of the crank chamber 9 communicate with each other through the cutout of the upper end of the baffle plate 7. Negative pressure is led into the reserve-tank 8 through a negative pressure switching valve 20 which is opened/closed by a liquid-surface sensor 17. Suction pipes 12, 13 are respectively provided at the reserve-tank 8 and the crank chamber 9, and the connections with an oil pump 15 are changed by a liquid-surface sensor 16 and a changeover valve 14. |
