| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent oil from being consumed in a short period of time by lubricating the oil amount suitable for a crank chamber having a crankshaft and a valve operating mechanism, respectively. <P>SOLUTION: The lubrication structure of a four-cycle engine is provided for lubricating the driving parts by supplying the oil stored in an oil using pressure fluctuation in the crank chamber. The lubrication structure includes a first circulating passage for supplying oil from the oil tank to the crank chamber and for returning the oil misted in the crank chamber to the oil tank, and a second circulating passage for supplying misted oil from the oil tank to the valve operating mechanism chamber and for returning the same to the oil tank. The crank chamber and the oil tank are partitioned by the partition 11, the center 20 of the partition 11 is arranged vertically above the oil level of the oil stored in the oil tank even though the engine body is inclined, and the opening A1 of the side for supplying the misted oil of the second circulating passage is arranged in the center 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
