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公开(公告)号：US11454192B2
公开(公告)日：2022-09-27
申请号：US16898561
申请日：2020-06-11
申请人： Cummins Inc.
发明人： Chao Cheng , Neal R. Phelps , Andrew Laughlin , Scott Daniel Saum
摘要： Unique apparatuses and methods for scraping deposits from a piston as the piston moves in an upstroke direction and a downstroke direction. An engine assembly includes a cylinder having a cylinder bore, a piston having a crown end, wherein the piston is disposed in the cylinder bore and configured to move in an upstroke direction and a downstroke direction relative to the cylinder bore. The piston includes a first land positioned adjacent the crown end. An antipolishing ring is disposed within the cylinder bore. The antipolishing ring has an outer annular surface and an inner annular surface, the inner annular surface has one or more protrusions configured to scrape the first land when the piston moves in the upstroke direction and the downstroke direction. The protrusions are also configured to scrape the first land when the piston has secondary or lateral motion.
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72.发明申请公开(公告)号：US20220099184A1
公开(公告)日：2022-03-31
申请号：US17039899
申请日：2020-09-30
申请人： Caterpillar Inc.
摘要： An insert for an engine block and systems, assemblies, components, and methods thereof can comprise a ring-shaped body having an inner surface and an outer surface opposite the inner surface. The inner surface can having one or more sealing grooves adapted to receive and retain respective sealing rings. A maximum outer diameter of the ring-shaped body can be defined by the outer surface and can be greater than a height of the ring-shaped body in a longitudinal direction of the ring-shaped body.
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公开(公告)号：US11274626B2
公开(公告)日：2022-03-15
申请号：US16583114
申请日：2019-09-25
发明人： Khizer Tufail , Arup Kumar Gangopadhyay , David Skipp , Thomas Reddyhoff , Sorin-Cristian Vladescu , Roland Paul Stark
摘要： Methods and systems are provided for a bore. In one example, a system includes a bore portion for receiving a reciprocating piston, the bore portion having first and second ends between which the piston travels in an axial direction. The bore portion comprises a plurality of recesses, axially spaced apart, and formed in a piston facing surface of the bore portion at a plurality of axial positions, with at least one recess being provided at each axial position. Widths of the plurality of recesses decrease in the axial direction away from a mid-stroke position toward the first and second ends, and depths of the plurality of recesses increase in the axial direction away from the mid-stroke position toward the first and second ends.
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公开(公告)号：US11141783B1
公开(公告)日：2021-10-12
申请号：US17246799
申请日：2021-05-03
摘要： An object of the present invention is to provide a cylinder liner for insert casting that can improve the joining strength between a cylinder liner and a cylinder block by reducing voids generated between the cylinder liner and the cylinder block.
The above-described problem can be solved when the molten metal running index YI defined by the following Formula (1) is from 2.2 to 14.5. Molten metal running index YI=[area ratio St (%) of top portions of protrusions×molten metal infiltration volume V (mm3)/surface area A (mm2) of cylinder liner base]/average surface-to-surface distance Pav between top portions of protrusions (mm) (1).-
公开(公告)号：US20200300091A1
公开(公告)日：2020-09-24
申请号：US16613484
申请日：2018-05-14
摘要： A sliding contact assembly includes a first surface and a second surface. The second surface of the sliding contact assembly is configured to slide over the first surface, and at least a portion of the second surface contacts the first surface to form at an interface between the first surface and the second surface. The sliding contact assembly also includes a plurality of textures on the portion of the second surface that contacts the first surface. A density of the plurality of textures is not uniform over the portion of the second surface that contacts the first surface. The sliding contact assembly can include apex seal to housing interfaces in rotary engines, roller to roller interfaces, roller to housing interfaces, bearing to surface interfaces, etc.
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公开(公告)号：US10697393B2
公开(公告)日：2020-06-30
申请号：US15737446
申请日：2016-06-30
摘要： A cylinder liner for an internal combustion engine, with a collar, whereby the cylinder liner, on its lateral surface, is provided with a protruding flow-guiding device axially spaced from the collar, having at least one axial opening.
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77.发明授权公开(公告)号：US10605194B2
公开(公告)日：2020-03-31
申请号：US15718975
申请日：2017-09-28
发明人： Rainer Lach , Franz Weber , Guenter Hans Grosch
摘要： The invention relates to a cylinder bore and a method. The cylinder bore is configured to receive a piston for reciprocating movement therein and has a pressure side and a counter-pressure side. The cylinder bore includes a bore surface having a first roughness value in a first longitudinal region on the pressure side and a second roughness value different from the first roughness value in the first longitudinal region on the counter-pressure side.
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公开(公告)号：US20200095951A1
公开(公告)日：2020-03-26
申请号：US16583114
申请日：2019-09-25
发明人： Khizer Tufail , Arup Kumar Gangopadhyay , David Skipp , Thomas Reddyhoff , Sorin-Cristian Vladescu , Roland Paul Stark
摘要： Methods and systems are provided for a bore. In one example, a system includes a bore portion for receiving a reciprocating piston, the bore portion having first and second ends between which the piston travels in an axial direction. The bore portion comprises a plurality of recesses, axially spaced apart, and formed in a piston facing surface of the bore portion at a plurality of axial positions, with at least one recess being provided at each axial position. Widths of the plurality of recesses decrease in the axial direction away from a mid-stroke position toward the first and second ends, and depths of the plurality of recesses increase in the axial direction away from the mid-stroke position toward the first and second ends.
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公开(公告)号：US10596624B2
公开(公告)日：2020-03-24
申请号：US16090123
申请日：2017-11-17
发明人： Akira Sayama , Koichi Hatakeyama , Akira Sato , Kazuki Seino , Katsuya Okuda , Tomoki Takiguchi
摘要： Provided is a cast-iron cylindrical member having projections (P) formed integrally with a casted surface (an outer peripheral surface), and a composite structure including the cast-iron cylindrical member and an outer periphery-side member. The cast-iron cylindrical member satisfies: (A) 0.50 mm>a height (H) of the projections (P)≥0.20 mm; (B) 180≥a total number (N) of the projections (P) per cm2 of the outer peripheral surface≥61; (C) the projections (P) include a projection (Pn) having a constricted shape; (D) a ratio (NP) of the projections (Pn) to the projections (P)≥50%; (E) a bonding strength index (S) expressed by: S=H2×N×NP is equal to or larger than 310; and (F1) a bonding strength F(Al) obtained when the outer peripheral surface of the cast-iron cylindrical member is cast-in inserted with an aluminum alloy exceeds a boundary bonding strength (Fb) expressed by: Fb=1.325×H2×N−0.75.
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公开(公告)号：US10584758B2
公开(公告)日：2020-03-10
申请号：US15573703
申请日：2016-05-11
申请人： NIFCO INC.
发明人： Shigemitsu Tomita
摘要： A damper includes a piston provided with a rod, and a cylinder storing the piston, and generates a braking force by a movement or relative movement of the piston. The cylinder is provided with width-side wall portions and thickness-side wall portions, and a shape in a cross section of the cylinder in a direction orthogonal to a moving direction of the piston is flat. The cylinder has a connection portion on an open side thereof, and the connection portion bridges the width-side wall portions.
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