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公开(公告)号：EP4056834A1
公开(公告)日：2022-09-14
申请号：EP19951589.1
申请日：2019-11-06
发明人： OHIRA, Masayuki , UMEDA, Naoki , TAMAKI, Seiji , SATO, Takashi , OIZUMI, Takashi
IPC分类号： F02F1/00
摘要： The present invention addresses the problem of providing a cylinder liner or a cylinder bore, which can reduce not only friction on a sliding surface but also oil consumption. In a piston sliding direction of the cylinder bore, grooves of a second sliding region positioned on the side of crankcase have a higher groove area ratio at a depth of 0.3 µm than grooves of a first sliding region positioned on the side of combustion chamber, and the groove area ratio is in a specific range, whereby friction and oil consumption can be reduced.
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公开(公告)号：EP3957415A1
公开(公告)日：2022-02-23
申请号：EP20873383.2
申请日：2020-06-24
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 S t % of top portions of protrusions × molten metal infiltration volume V mm 3 / surface area A mm 2 of cylinder liner base / average surface-to-surface distance P av between top portions of protrusions mm-
公开(公告)号：EP3901477A1
公开(公告)日：2021-10-27
申请号：EP19900474.8
申请日：2019-12-13
申请人： TPR CO., LTD.
摘要： Provided is a thrust washer, which enables achievement of a reduction in sliding load. A thrust washer (20) includes: oil grooves (25) formed in at least one of the front surface or the back surface, which are recessed with respect to a sliding surface (26) and are configured to receive lubricating oil flowing thereinto; opening portions (27) formed on an inner peripheral end side of an ring-shaped portion (21) for the oil grooves (25), which are recessed with respect to sliding surface (26) and are configured to allow the lubricating oil to be flowed into the oil grooves (25) from an insertion hole (22) side; and an oil stop wall (28) formed at an end portion of at least one of the oil grooves (25) on an outer periphery side of the ring-shaped portion (21), which is configured to separate the oil groove (25) and an outside of the ring-shaped portion (21) from each other and suppress flow of the lubricating oil flowed into the oil groove (25) to an outer periphery side of the ring-shaped portion (21), the oil stop wall (28) being formed at the same position as a position of the sliding surface (26) in a thickness direction of the oil stop wall (28). A sliding area ratio of each of the sliding surfaces (26) to a projection plane in plan view of the ring-shaped portion is set to fall within a range of from 60% to 85%.
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公开(公告)号：EP3805545A1
公开(公告)日：2021-04-14
申请号：EP18910238.7
申请日：2018-12-12
发明人： SATO, Akira , SATO, Takashi , ABE, Mako
摘要： To provide a cast iron cylindrical member capable of improving the bonding strength when metal on the outer peripheral side and the cast iron cylindrical member are integrated. For this objective, in a cast iron cylindrical member including a plurality of projections including constricted projections on the outer peripheral surface, the anchor portion index (I) represented by {(A av 2 - B av 2 ) × π/4 × Pn x Pr/100} × 0.35H/2 is set in a specific range.
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公开(公告)号：EP3327321A1
公开(公告)日：2018-05-30
申请号：EP16871798.1
申请日：2016-10-21
申请人： TPR Co., Ltd.
发明人： YAMAGUCHI, Hitoshi , OGA, Teppei
IPC分类号： F16J15/26
摘要： Provided is a seal ring causing less friction and having a low oil leakage property even under a state in which a shaft rotation frequency or a housing rotation frequency is high, and being capable of reducing a shaft rotation torque. A level difference portion that forms a second width (a21 and a211) smaller than a first width (a1) is formed on a longitudinal sectional shape of the seal ring as viewed in a circumferential direction from a seal ring outer peripheral surface (13) side toward a seal ring inner peripheral surface (12) side. The level difference portion is formed so that a center line (M2) of the secondwidth in the circumferential direction of the seal ring in which a sealed fluid flows draws a trajectory of extending along the circumferential direction and shifting from an abutment joint end surface on an inner periphery side of a seal ring abutment joint portion at one end toward an abutment joint end surface on the inner periphery side of the seal ring abutment joint portion at another end so as to be closer to the seal ring contact surface (14).
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公开(公告)号：EP2577015B8
公开(公告)日：2014-09-10
申请号：EP11732511.8
申请日：2011-06-06
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公开(公告)号：EP2365233B1
公开(公告)日：2014-04-30
申请号：EP11156601.4
申请日：2011-03-02
申请人： TPR Co., Ltd.
IPC分类号： F16J9/06
CPC分类号： F16J9/068
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公开(公告)号：EP4450795A1
公开(公告)日：2024-10-23
申请号：EP22928887.3
申请日：2022-11-16
申请人： TPR CO., LTD.
发明人： ABE, Yushi , UMEDA, Naoki , OHIRA, Masayuki , HIKONE, Akira
摘要： An outer circumferential surface of a piston ring has a cut surface forming a notched portion between an outer circumferential end surface and a lower surface, the cut surface including a first surface between the outer circumferential end surface and a bottom portion, and a second surface between the bottom portion and the lower surface. The second surface is inclined away from a central axis of the piston ring as it extends toward a crank chamber side, an angle of inclination of the second surface with respect to the bottom portion being greater than or equal to 50° and less than or equal to 85°. When an axial width of the piston ring is h1 and a distance in an axial direction between a connecting portion between the cut surface and the outer circumferential end surface and a connecting portion between the cut surface and the lower surface is H, H/h1 is greater than or equal to 0.2 and less than or equal to 0.4.
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公开(公告)号：EP4414469A1
公开(公告)日：2024-08-14
申请号：EP22940514.7
申请日：2022-12-09
申请人： TPR Co., Ltd.
发明人： MAEDA, Koki , UCHIDA, Fukutoshi
摘要： The present invention solves a novel problem of corrosive wear that occurs in the use of a valve seat in an internal combustion engine using a hydrogen gas fuel. The problem is solved by an iron-based sintered alloy valve seat used in an internal combustion engine using a hydrogen gas fuel, in which the Cr content is 6% by mass to 23% by mass, the Mo content is 5% by mass to 20% by mass, the Cu content is 10% by mass to 23% by mass, the Co content is 3% by mass or more, and a total content of Cr, Mo, and Co is 14% by mass to 47% by mass.
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公开(公告)号：EP4206498A1
公开(公告)日：2023-07-05
申请号：EP21951933.7
申请日：2021-07-30
申请人： TPR CO., LTD.
IPC分类号： F16J9/12
摘要： A combination of piston rings assembled to a piston includes a first compression ring, a second compression ring, a third compression ring and an oil ring. When an axial width of the first compression ring is h1(1), an axial width of the second compression ring is hl(2), an axial width of the third compression ring is hl(3) and an axial width of the oil ring is h1(4), h1(1) ≥ h1(2) and h1(1) ≥ h1(3), and when hl(TOTAL) = h1(1) + h1(2) + h1(3) + h1(4), h1(TOTAL) ≥ 3.1 mm.
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