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公开(公告)号：US11499498B2
公开(公告)日：2022-11-15
申请号：US17296877
申请日：2019-07-23
发明人： Yuki Kuromasa , Koichi Hatakeyama , Takashi Ozawa
摘要： A cylinder liner of the present invention is a cylinder liner mounted on a cylinder block and formed of flaky graphite cast iron, at least a nitrided layer is provided on an inner periphery of the cylinder liner, and a cross hatching section is formed on the inner periphery, a roughness curve of the inner periphery has a plateau honing shape, a ten-point average roughness Rz of the inner periphery pursuant to JIS B0601:1982 is 4.0 μm or less, and an average value of an area ratio of pits generated in the inner periphery is 8% or less.
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公开(公告)号：US20200063684A1
公开(公告)日：2020-02-27
申请号：US16546437
申请日：2019-08-21
发明人： Akira Sato , Koichi Hatakeyama
摘要： A cylinder liner that is casted in a block and defines a cylinder bore for one cylinder includes: a cylindrical liner body; a projection part including a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part inclined at a predetermined angle to an axial direction of the body and extending in the inclination direction, at a predetermined part between an upper side end and a lower side end of the body, of the outer peripheral surface of the body, which faces another cylinder bore to be adjacent when casted in the block. The outer peripheral surface of the bore adjacent part is positioned more on an inner side of the body than the outer peripheral surface above and below, and is formed such that the projections are absent on at least a part of the outer peripheral surface.
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公开(公告)号：US10428407B2
公开(公告)日：2019-10-01
申请号：US15521554
申请日：2016-09-05
发明人： Koichi Hatakeyama , Akira Sayama , Akira Sato
摘要： Provided is a cylindrical member made of flake graphite cast iron that has practical processability as well as excellent mechanical strength and further is excellent in abrasion resistance and seizing resistance. Specifically, provided is a cylindrical member made of flake graphite cast iron, the flake graphite cast iron including a composition containing, in terms of mass %, 2.85% or more and 3.35% or less of C, 1.95% or more and 2.55% or less of Si, 0.45% or more and 0.8% or less of Mn, 0.03% or more and 0.25% or less of P, 0.15% or less of S, 0.15% or more and 0.55% or less of Cr, 0.15% or more and 0.65% or less of Mo, 0.15% or more and 0.65% or less of Ni, and the balance of Fe and inevitable impurities.
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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：US20200063685A1
公开(公告)日：2020-02-27
申请号：US16546449
申请日：2019-08-21
发明人： Akira Sato , Koichi Hatakeyama
摘要： A cylinder liner that is casted in a block and defines a cylinder bore corresponding to one cylinder includes: a cylindrical liner body; a projection part provided so as to include a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part formed such that the outer peripheral surface at an upper side end of the liner body is positioned more on an inner side of the liner body than the outer peripheral surface below the upper side end, and the projections are absent on at least a part of the outer peripheral surface at the upper side end, in a predetermined range of the outer peripheral surface of the liner body, which faces another cylinder bore to be adjacent when casted in the block.
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公开(公告)号：US11168642B2
公开(公告)日：2021-11-09
申请号：US16979229
申请日：2018-12-12
摘要： The present invention addresses the problem of providing a cylinder liner for insert casting, with which the bonding strength between a cylinder liner and a cylinder block can be improved by reducing voids generated on the cylinder block. The problem is solved by a cylinder liner for insert casting which includes plural projections on its outer peripheral surface and satisfies the following (i) and (ii): (i) the number of the projections is 5 to 50 per 1 cm2 on the outer peripheral surface, and (ii) when two 15.2 mm×0.03 mm lines are set in parallel with a gap of 3.8 mm therebetween at an arbitrary position on the outer peripheral surface of the cylinder liner, the total number of projections that are in contact with the two lines is 8 or less.
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公开(公告)号：US11047333B2
公开(公告)日：2021-06-29
申请号：US16546437
申请日：2019-08-21
发明人： Akira Sato , Koichi Hatakeyama
摘要： A cylinder liner that is casted in a block and defines a cylinder bore for one cylinder includes: a cylindrical liner body; a projection part including a plurality of projections on an outer peripheral surface of a part of the liner body; and a bore adjacent part inclined at a predetermined angle to an axial direction of the body and extending in the inclination direction, at a predetermined part between an upper side end and a lower side end of the body, of the outer peripheral surface of the body, which faces another cylinder bore to be adjacent when casted in the block. The outer peripheral surface of the bore adjacent part is positioned more on an inner side of the body than the outer peripheral surface above and below, and is formed such that the projections are absent on at least a part of the outer peripheral surface.
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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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