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    • 6. 发明申请
    • LUBRICATION APPARATUS FOR FOUR-STROKE ENGINE
    • 四冲程发动机润滑装置
    • US20120199097A1
    • 2012-08-09
    • US13502799
    • 2010-06-23
    • Masaki SugiyamaToshihiro TomitaMasaki KurimotoHiroshi KubotaTetsuya Hasegawa
    • Masaki SugiyamaToshihiro TomitaMasaki KurimotoHiroshi KubotaTetsuya Hasegawa
    • F01M1/04
    • F16N7/32F01M1/04F01M3/04F01M11/02
    • A lubrication apparatus for a four-stroke engine (1) is provided that prevents lubrication failure from occurring around the crankshaft and reliably prevents oil from remaining in a valve operating chamber (30). The lubrication apparatus for the four-stroke engine (1) includes: an intake part (55) positioned below the level of an oil A in an oil reservoir (7) even if the oil reservoir (7) is tilted and the level of the oil A changes; an oil feeding passageway (54) that sucks up the oil A from the intake part (55) and supplies the oil A to the crank chamber (5a); and an direct passageway (47) that allows communication between a valve operating chamber (30) and a crank chamber (5a) when a negative pressure is created in the crank chamber (5a). Open end parts (47a, 54a) of the oil feeding passageway (54) and the direct passageway (47) which are open in the crank chamber (5a) are provided to open as the piston (13) moves from a position near the top dead center to the top dead center. It is possible to control the flow rate of oil supplied to the crank chamber (5a) via the oil supply passageway (54) by means of a flow rate control passageway (67) that allows communication between a supply passageway (51) to supply oil mist from the oil reservoir (7) to the valve operating chamber (30) and the oil feeding passageway (54).
    • 提供一种用于四冲程发动机(1)的润滑装置,其防止在曲轴周围发生润滑故障,并且可靠地防止油残留在阀操作室(30)中。 用于四冲程发动机(1)的润滑装置包括:即使储油器(7)倾斜并且油位(7)的水平位于油藏(7)中的位于油A的高度之下的进气部分(55) 油A变化; 供油通路(54),其从所述进气部(55)吸入油A,并将油A供给到所述曲柄室(5a); 以及当在曲柄室(5a)中产生负压时允许阀操作室(30)和曲柄室(5a)之间的连通的直接通道(47)。 供油通道(54)的开口端部(47a,54a)和在曲柄室(5a)中敞开的直接通道(47)设置成随着活塞(13)从靠近顶部 死中心到上死点。 可以通过流量控制通道(67)来控制经由供油通道(54)供应到曲柄室(5a)的油的流量,流量控制通道(67)允许供给通道(51) 从油箱(7)到阀操作室(30)和供油通道(54)的雾。