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公开(公告)号：US20230272853A1
公开(公告)日：2023-08-31
申请号：US18043596
申请日：2021-07-29
发明人： RICHARD MITTLER , FABIAN RUCH
IPC分类号： F16J9/10
CPC分类号： F16J9/10
摘要： A piston ring system for an internal combustion engine includes a first compression piston ring (2), a second compression piston ring (4), and an oil scraper piston ring (6). The first compression piston ring (2) has a first ring body (8) with a first upper ring flank (10), a first lower ring flank (12), a first ring inner side (14), a first ring outer side (16), as well as two first abutting surfaces. A first contact region (18) of the first ring body (8) is arranged with a cylinder running surface (20) above a first piston ring center (22). At least one first oil pocket (24) is arranged below the first contact region (18) in the circumferential direction. The second compression piston ring (4) having a second ring body (26) a second upper ring flank (28), a second lower ring flank (30), a second ring inner side (32), a second ring outer side (34), as well as two second abutting surfaces. A second contact region (36) of the second ring body (26) is arranged with the cylinder running surface (20) above or below a second piston ring center (38). At least one second oil pocket (40) is arranged below the second contact region (36) in the circumferential direction. The oil scraper piston ring (6) is formed in one piece, two pieces, or three pieces.
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公开(公告)号：US11713811B2
公开(公告)日：2023-08-01
申请号：US17260794
申请日：2019-05-28
IPC分类号： F16J9/06
摘要： A multi-piece piston ring includes an upper scraper ring 10 comprising two flank surfaces, an outer scraping surface/edge, and an inner spring contact surface. A lower support ring 4 includes two flank surfaces, an outer spring contact surface, and a support ring inner surface. An expander spring/spiral spring 8, which, on an upper and lower side, is operational to abut against a respective lower flank surface of the upper scraper ring 10 and against the upper flank surface of the support ring 4. Scraper ring contact projections protruding upwards on an inner spring side, and support ring contact projections protruding downwards on an outer spring side, wherein the scraper ring contact projections are to each abut against the inner spring contact surface of the scraper ring 10, and support ring contact projections protruding downwards are to abut against the outer spring contact surface.
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公开(公告)号：US11493129B2
公开(公告)日：2022-11-08
申请号：US17274494
申请日：2019-09-02
发明人： Richard Mittler , Fabian Ruch
摘要： A piston ring has a running surface, an inner surface, a lower ring flank, and an upper ring flank. A recess, extending across the perimeter in the shape of an internal angle, is located at the transition between the inner surface and the upper ring flank. The recess defines a conical first surface and a conical second surface at the piston ring. The first surface lies farther outward, when viewed in the radial direction, and farther above, when viewed in the axial direction, than the second surface. In an axial cross section, a first angle between the axial direction and the first surface lies in the range between 10° and 50°, and a second angle between the radial direction and the second surface lies in the range between 5° and 30°. A piston having a piston ring groove includes a projection on the groove bottom. A combination made from an above-mentioned piston ring and an above-mentioned piston are adapted to one another, so that the projection projects into the recess.
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公开(公告)号：US11187322B2
公开(公告)日：2021-11-30
申请号：US16474631
申请日：2018-01-04
发明人： Jurgen Gillen , Fabian Ruch , Jorn Propper
摘要： A stepped piston ring (2) includes a ring outer side (5), an upper ring flank (6), and a lower ring flank (8). The ring outer side (5) on the upper edge has a notch (10, so that only a lower portion of the ring outer side (5) forms a contact surface (4).
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公开(公告)号：US11092238B2
公开(公告)日：2021-08-17
申请号：US16082607
申请日：2016-11-28
发明人： Stephan Machliner , Fabian Ruch
摘要： A three-piece piston oil control ring 2 has an upper, disc-shaped scraping ring 4, a lower, disc-shaped stabilising ring 6, and a circular expander 8 which has projections 10 protruding in the axial direction on an inner face. The circular expander 8 is arranged between the upper scraping ring 4 and the lower stabilising ring 6, wherein the projections 10 each bear inwardly against an inner face 14 of the scraping ring 4 or against an inner face 16 of the stabilising ring 6. An outer radius 18 of the scraping ring 4 is greater than an outer radius 20 of the lower stabilising ring 6, so that there is a radius difference δ between the scraping ring 4 and the stabilising ring 6.
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公开(公告)号：US20210180695A1
公开(公告)日：2021-06-17
申请号：US17268211
申请日：2019-07-18
发明人： DIRK BÄRENREUTER , JÜRGEN GILLEN
摘要： A three-part oil scraper ring includes an expander spring and two scraper rings, comprising a ring body (4) having an upper flank (6), a lower flank (8), a ring inner surface (10) and a ring outer surface (12) which has a ring outer contour (14) in cross-section in axial direction (A). The ring body (4) has a height H which corresponds to the greatest distance of the upper flank (6) to the lower flank (8). The ring outer contour (14) forms a running surface (16) which has a radius of curvature R which is smaller than the height H of the scraper ring (2) by a factor between 1.5 to 6, preferably between 3 to 5 and further preferably between 3.5 to 4.5.
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公开(公告)号：US20200378498A1
公开(公告)日：2020-12-03
申请号：US16497083
申请日：2017-11-09
发明人： NIGEL GRAY
摘要： A play-free oil scraper ring has a cross section with a running surface leg having at least one scraper web that is situated on a running surface, an upper piston ring flank leg that is connected to the running surface leg, and the upper surface of which forms an upper piston ring flank. A lower piston ring flank leg is likewise connected to the running surface leg, the lower surface of which forms a lower piston ring flank. The upper and/or the lower piston ring flank leg are/is elastic, taper(s) inwardly in the radial direction, and their/its piston ring flank(s) essentially form(s) a conical surface in an uninstalled state. The uninstalled piston ring has an axial height that exceeds a width of a piston ring groove for which the piston ring is intended.
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公开(公告)号：US10428944B2
公开(公告)日：2019-10-01
申请号：US15742356
申请日：2016-06-22
发明人： Thomas Schulte-Sasse
摘要： The running face of a compression piston ring also having an inner circumferential surface, and upper and lower flank surfaces interposed between the running face and the inner circumferential surface is provided, in a region thereof adjacent the lower flank, with a first taper of less than 30′, having an axial height of 10 to 30%, based on the total running face height (H), the first taper transitioning into a second taper extending in the direction toward the upper flank surface, which is between 90′ and 200′, and the running face is also provided with a thin wear-resistant layer having a thickness from 0.1 to less than 20 μm, and in particular 4 to 6 μm.
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公开(公告)号：US20190100836A1
公开(公告)日：2019-04-04
申请号：US16095048
申请日：2017-03-01
发明人： PETER-KLAUS ESSER
IPC分类号： C23C14/06 , C23C14/58 , C23C14/04 , C23C28/04 , C23C28/00 , C23C14/34 , C23C14/32 , F16J9/26
摘要： A piston ring is provided with is furnished with a diamond-like carbon (DLC) layer as a functional/wear protection layer, wherein the DLC layer is covered with a protective layer, the material of which differs from that of the DLC layer, and the material of which has higher thermal resistance that the material of the DLC layer. In addition, a method is provided for producing a piston ring with a DLC wear protection layer, in whose surface the protective layer is present in the form of deposits in depressions created by the surface roughness.
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公开(公告)号：US20190011047A1
公开(公告)日：2019-01-10
申请号：US15737867
申请日：2016-04-19
发明人： RICHARD MITTLER , FRANK NATHEM
摘要： A piston ring (2) has at least one ring flank seal (14) arranged on a lower ring flank (8) of the piston ring.
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