OIL RING MECHANISM OF A PISTON

专利名称：OIL RING MECHANISM OF A PISTON发明人：Hiroyuki Nishiura,Naoya Okada,Kenji

Hayama,Youhei Hashimoto,HideshiHitosugi,Ryosuke Naka

申请号：US13321737申请日：20100330

公开号：US20120061920A1公开日：20120315

专利附图：

摘要：An oil ring mechanism of a piston includes a circumferential ring groove formedin an outer peripheral surface of the piston, and a two-piece oil ring having a ring-shaped

ring main body that is arranged in the ring groove and urged in the outer peripheraldirection inside the ring groove by a coil expander arranged on the inner peripheral sideof the oil ring main body. On lower side surface on a crankcase side of a side wall surfaceof the ring groove that is on the opposite side of the ring groove from an enginecombustion chamber, first and second recessed portions that reduce the abutment areawhere a lower surface of the ring main body abuts against the lower side surface formedin a lower side abutment surface that serves as a surface for abutting against the lowersurface of the ring main body.

申请人：Hiroyuki Nishiura,Naoya Okada,Kenji Hayama,Youhei Hashimoto,HideshiHitosugi,Ryosuke Naka

地址：Toyota-shi JP,Kasugai-shi JP,Toyota-shi JP,Toyota-shi JP,Saitama-City JP,Hasuda-shi JP

国籍：JP,JP,JP,JP,JP,JP

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