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公开(公告)号：US11719187B2
公开(公告)日：2023-08-08
申请号：US17832028
申请日：2022-06-03
发明人： Walter T. Bonin
CPC分类号： F02F11/007 , F01C1/07 , F01C19/08 , F02B23/00 , F02B53/06 , F02B55/02 , F02F5/00 , F15B15/125
摘要： An engine includes a housing and a combustion assembly. The combustion assembly includes an annular bore and a combustion piston assembly disposed within the annular bore. The combustion piston assembly includes a set of pistons, a first sealing ring connected to each piston and a second sealing ring connected to each piston. The second sealing ring is configured to provide selective access between the annular bore and at least one fluid conduit carried by the engine. The engine includes at least one valve configured to move between a first position within the annular bore to allow the combustion piston assembly to travel within the annular bore from a first location proximate to the at least one valve to a second location distal to the at least one valve and a second position within the annular bore to define a combustion chamber.
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公开(公告)号：US20220290629A1
公开(公告)日：2022-09-15
申请号：US17832028
申请日：2022-06-03
发明人： Walter T. Bonin
摘要： An engine includes a housing and a combustion assembly. The combustion assembly includes an annular bore and a combustion piston assembly disposed within the annular bore. The combustion piston assembly includes a set of pistons, a first sealing ring connected to each piston and a second sealing ring connected to each piston. The second sealing ring is configured to provide selective access between the annular bore and at least one fluid conduit carried by the engine. The engine includes at least one valve configured to move between a first position within the annular bore to allow the combustion piston assembly to travel within the annular bore from a first location proximate to the at least one valve to a second location distal to the at least one valve and a second position within the annular bore to define a combustion chamber.
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公开(公告)号：US11313466B2
公开(公告)日：2022-04-26
申请号：US16555573
申请日：2019-08-29
发明人： Balakrishna Chinta , John B Fisher , Zheng Ma
摘要： A piston assembly for an internal combustion engine of a motor includes a piston head having an outer diameter surface spaced a first distance from the longitudinal axis and an annular surface spaced a second distance from the longitudinal axis, with the second distance being less than the first distance. Upper and lower walls extend between the annular surface and the outer diameter surface so as to define an annular groove in the outer diameter surface. A piston ring is received within the annular groove and includes an inner diameter surface facing the annular surface of the piston head. The inner diameter surface of the piston ring and the annular surface of the piston head cooperate with one another to define a plurality of pockets angularly spaced from one another about the longitudinal axis and configured to receive oil.
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公开(公告)号：US11242929B2
公开(公告)日：2022-02-08
申请号：US17254546
申请日：2019-06-13
申请人： TPR Co., Ltd.
摘要： The present invention addresses the problem of providing a piston ring covered with a DLC coating that has excellent wear resistance and shows a low attacking property on a cylinder bore sliding surface. The problem is solved by a piston ring which is used in the presence of an engine lubricating oil and includes a DLC coating on an outer peripheral sliding surface. The DLC coating has an sp2 component ratio of 0.5 to 0.85 as determined from a TEM-EELS spectrum obtained by a combination of a transmission electron microscope (TEM) and electron energy loss spectroscopy (EELS), as well as a coating hardness of 12 GPa to 26 GPa and a Young's modulus of 250 GPa or less as measured by a nanoindentation method.
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公开(公告)号：US20210140542A1
公开(公告)日：2021-05-13
申请号：US17155674
申请日：2021-01-22
发明人： Matt Svrcek
摘要： A ringset is configured to be arranged on a piston for sealing a gas in a high-pressure region of a cylinder in the absence of oil or other liquid lubricant. The ringset includes one or more rings made from a high-strength material as a sealing element. The ringset also includes a solid lubricant applicator configured to provide lubrication between the one or more rings and a bore of the cylinder. For example, the ring can support pressure loads from high-pressure gas without breaking, while the applicator need not act as a seal. As the piston reciprocates in the bore, the applicator slides against the bore and applies solid lubricant material to the bore, resulting in a solid lubricant film on the bore against which the sealing element may slide. The applicator includes a material such as a graphite, a polymer, or other suitable solid lubricant.
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公开(公告)号：US10914380B2
公开(公告)日：2021-02-09
申请号：US16498704
申请日：2018-03-27
摘要： A piston includes a piston body and a piston ring fitted into a ring groove. The piston ring has a top surface that includes: a convex portion formed between an inner edge position and a central position at which a radial direction thickness is ½, with the piston ring in a free state, and a planar portion or an inclined peripheral portion continuous with the convex portion on a radially outer side of the convex portion. In a predetermined status of the piston body and the piston ring, an angle between the top surface of the ring groove and the planar portion or the inclined peripheral portion is at least 18 arcminutes in a cross-section that is parallel to a central axis of the piston body and includes the central axis.
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公开(公告)号：US10415704B2
公开(公告)日：2019-09-17
申请号：US15546648
申请日：2016-01-12
发明人： Masaaki Fujita
摘要： A piston ring includes an annular main body 2 having a side surface 2a and a side surface 2b, and an inner peripheral surface 2c and an outer peripheral surface 2d, wherein in the main body 2, a cutout section 21 is provided in a corner section 31 formed by the side surface 2b and the outer peripheral surface 2d. The cutout section 21 has a first surface 21a and a second surface 21b. An angle θ1 formed by the first surface 21a and the side surface 2b is an obtuse angle, and a corner section 32 formed by the second surface 21b and the outer peripheral surface 2d is located between the side surface 2b and the side surface 2a in a width direction of the main body 2.
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公开(公告)号：US10352446B2
公开(公告)日：2019-07-16
申请号：US15536799
申请日：2015-12-22
发明人： Takayuki Ichikawa , Takuma Sekiya
IPC分类号： C23C8/02 , F16J9/26 , C23C8/26 , C25D5/50 , C25D7/00 , F02F5/00 , F16J9/06 , C25D5/36 , C23C28/00 , C25D7/06
摘要： A combined oil control ring comprising a pair of annular side rails each having a gap, and an axially corrugated spacer expander arranged between the side rails; the corrugated spacer expander having on the inside seating tabs for pushing inner peripheral surfaces of the side rails; the side-rail-pushing surface of each seating tab being provided with a nitrided layer; an entire surface of each spacer expander except for those provided with the nitrided layer being coated with a plating film; and the plating film having Vickers hardness HV0.01 of 300 or less.
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公开(公告)号：US10352445B2
公开(公告)日：2019-07-16
申请号：US16079556
申请日：2017-02-21
发明人： Masaaki Fujita
摘要： A piston ring includes an annular body having: an inner circumferential surface and an outer circumferential surface; one side surface and the other side surface substantially orthogonal to the inner circumferential surface; and a pair of joint ends. The outer circumferential surface includes an inclined surface and an abutment surface. In a direction connecting the one side surface and the other side surface, a maximum width W1 of the abutment surface at the joint end is 80% to 150% of a maximum width W2 of the abutment surface in a portion other than the joint end. In the body, a two-axis difference (d2−d1) between a diameter d1 in a first axis direction passing through a central position of the joint and a diameter d2 in a second axis direction orthogonal to the first axis direction is greater than −0.25 mm and less than +0.36 mm.
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公开(公告)号：US10197160B2
公开(公告)日：2019-02-05
申请号：US15534119
申请日：2015-12-01
摘要： An oil ring (1) includes an oil ring body (10) and a coil expander (20). The oil ring body (10) includes a pair of rail portions (12) each including an end portion of an outer periphery having a land (30) formed protruding radially outward from each rail portion (12). The land (30) includes an upper axial portion (31) and a lower axial portion (32) facing opposite to each other in an axial direction, a tapered portion (33) having one axial end contiguous to the upper axial portion (31) via a first curved portion (35), and a protruding portion (34) having one of axial ends contiguous to the tapered portion (33) and the other axial end contiguous to the lower axial portion (32) via a second curved portion (36). The protruding portion (34) is protruding in a direction perpendicular to the tapered portion (33).
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