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公开(公告)号：US20090020006A1
公开(公告)日：2009-01-22
申请号：US12172506
申请日：2008-07-14
申请人： Masao ISHIDA
发明人： Masao ISHIDA
摘要： A piston 1 contains multiple ring grooves 2, 3 on the outer circumference of the piston 1, and piston rings 4, 10 are mounted in the ring grooves 2, 3. The piston 1 contains oil path grooves 7, 9 extending respectively to the outer circumference of the piston 1 on the upper and lower surfaces of the lowermost ring groove 2, and an oil path groove 12 extending to the outer circumference of the piston 1 on the lower surface of the ring groove 3 just above the lowermost ring groove 2. The weight of the lowermost piston ring 4 is equal to or smaller than the weight of the piston ring 10 just above the lowermost piston ring 4; and expanders 5, 11 are installed on the rear side of the piston rings 4, 10 respectively.
摘要翻译： 活塞1在活塞1的外周上包含多个环槽2,3，活塞环4,10安装在环槽2,3中。活塞1包含分别延伸到外部的油路槽7,9 活塞1在最下环槽2的上表面和下表面上的周长以及在最下环形槽2正上方的环槽3的下表面上延伸到活塞1外周的油路槽12。 最下面的活塞环4的重量等于或小于刚好在最下面的活塞环4上方的活塞环10的重量; 而膨胀机5,11分别安装在活塞环4,10的后侧。
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公开(公告)号：US20100162987A1
公开(公告)日：2010-07-01
申请号：US12641706
申请日：2009-12-18
申请人： Masao ISHIDA
发明人： Masao ISHIDA
摘要： A piston device for internal combustion engines includes a first compression ring and a second compression ring in an outer circumference of a piston, wherein the second compression ring includes a notch extending from the inner circumference to the outer circumference on a lower surface of at least one of a pair of ends of the ring, and a gap between the ring ends at the notch on the second compression ring is larger than a gap between the ring ends of the first compression ring, and a gap between the ring ends at the section other than the notch on the second compression ring is the same or smaller than the gap between the ring ends of the first compression ring, and the second compression ring contains an outer circumferential surface comprised of a tapered surface decreasing the ring radial thickness towards the upper side, and an axial parallel surface formed below the tapered surface. Instead of the axial parallel surface, the second compression ring may utilize a tapered surface with a taper angle smaller than the taper angle of the above tapered surface; or may utilize a tapered surface decreasing the ring radial thickness towards the lower side.
摘要翻译： 内燃机的活塞装置在活塞的外周具有第一压缩环和第二压缩环，其特征在于，所述第二压缩环包括从所述内周向所述外周延伸的缺口，所述凹口位于至少一个的下表面 并且所述第二压缩环上的所述凹口处的所述环端之间的间隙大于所述第一压缩环的所述环端之间的间隙，并且在所述第二压缩环的所述截面之间的所述环端之间的间隙 比第二压缩环上的槽口等于或小于第一压缩环的环形端部之间的间隙，并且第二压缩环包含由锥形表面组成的外周表面，以减小环向上侧的环径向厚度 以及在锥形表面下方形成的轴向平行表面。 代替轴向平行表面，第二压缩环可以利用具有小于上述锥形表面的锥角的锥角的锥形表面; 或者可以利用朝向下侧减小环径向厚度的锥形表面。
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