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公开(公告)号：US11668263B2
公开(公告)日：2023-06-06
申请号：US16605521
申请日：2018-04-18
CPC分类号： F02F3/0076 , B23P15/10 , F02F3/22 , F16J1/02 , F16J1/04 , F02F2200/04
摘要： Piston (1) of an internal combustion engine, which piston is designed in structured construction, comprising two oppositely arranged load-bearing skirt wall portions (2), wherein a connecting wall (3) respectively extends, starting from a pin boss (4), in the direction of the side edge of the load-bearing skirt wall portions (2), characterized in that in an interior of the piston (1) is (are) disposed at least one rib (5, 6, 7), preferably three ribs (5, 6, 7), and the material of the regions around the at least one rib (5, 6, 7) is reduced.
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公开(公告)号：US11498126B2
公开(公告)日：2022-11-15
申请号：US16282636
申请日：2019-02-22
申请人： MAN Truck & Bus AG
发明人： Matthias Korn , Peter Scharf
IPC分类号： B22F5/00 , B23K26/352 , F02F3/00 , F02F3/12 , B23K26/342 , B23K10/02 , B23K15/00 , B23K9/04 , B23P15/10 , F02F3/14 , B33Y10/00 , B33Y80/00 , B23K101/00 , B22F7/08 , B22F7/06 , C22C1/04 , B22F10/20
摘要： The disclosure relates to a method for producing a component, in particular a vehicle component or an engine component, such as a piston of an internal combustion engine. The method comprises forming a first body region, in particular by means of casting or forging. The method includes forming a second body region, which is connected to the first body region, from an aluminium alloy or an iron-based alloy or a copper-based alloy by means of an additive manufacturing method. The second body region is alloyed in such a manner that it has higher thermal stability, higher mechanical strength or higher wear resistance upon tribological stressing than the first body region.
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公开(公告)号：US20220126406A1
公开(公告)日：2022-04-28
申请号：US17434021
申请日：2020-01-15
申请人： HITACHI ASTEMO, LTD.
IPC分类号： B23P15/10
摘要： A production method for a cylinder device includes a first liquid injection step of injecting a first predetermined amount of working fluid L into the inner cylinder, a first piston rod insertion step of inserting an assembly between the piston rod and the piston into the inner cylinder to dispose the piston at a predetermined position inside the inner cylinder, a second liquid injection step of injecting a second predetermined amount of the working fluid into an upper side of the piston inside the inner cylinder, and a closing step of closing the opening of the outer cylinder with the closing member.
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公开(公告)号：US11236826B2
公开(公告)日：2022-02-01
申请号：US16300181
申请日：2017-04-27
发明人： Tobias Schmidt , Matthias Würz , Norbert Leidecker , Martin Klacik , Matthias Müller , Uwe Zeibig , Ulrich Lorenz , Rico Bauersfield
IPC分类号： F16J1/00 , B23P15/10 , F16D125/06 , F16D65/18
摘要： A pot-shaped, cold-formed steel brake piston as a pot which is open on one side includes a base and a wall including inner and outer walls, a radially inwardly configured groove is open in a radially outward direction and forms, radially at the inside, a groove bead projection. The open side of the pot ends as a bearing for a friction pad backplate. Interfaces integrated at the inside on the end side serve a) for the fixing between friction pad and steel brake piston and b) as support bearing for spring mounting the friction pad. An aspect is a further improved steel brake piston of the new generation. The minimum inner diameter dimin is axially set back in the direction of the base by a multiple of the length of a wall thickness s, and the minimum piston inner diameter dimin is formed by the groove bead projection.
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公开(公告)号：US11193511B2
公开(公告)日：2021-12-07
申请号：US16311382
申请日：2017-06-21
发明人： Christoph Guhl , Bernhard Müller
摘要： The invention relates to a method for producing a piston rod unit, or a shaft, in lightweight construction, with a rod which is hollowly-drilled by means of a deep bore into the rod shank, and the resulting rod opening is closed subsequently by means of a forging process.
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公开(公告)号：US11112009B2
公开(公告)日：2021-09-07
申请号：US16839626
申请日：2020-04-03
申请人： CUMMINS INC.
发明人： David M. Barnes
摘要： A piston for an internal combustion engine includes a skirt and a crown coupled to the skirt. The crown is produced in isolation from the skirt using an additive manufacturing process. The piston includes a first air gap between the crown and the skirt. According to an example embodiment, the crown includes a plurality of sections produced in isolation from the skirt. The crown may include a second air gap disposed between two of the plurality of sections.
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公开(公告)号：US10968862B2
公开(公告)日：2021-04-06
申请号：US16110874
申请日：2018-08-23
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless piston for an internal combustion engine is provided. The piston has a monolithic piston body including an upper wall forming an upper combustion surface with first and second portions. The first portion extends annularly along an outer periphery of the upper wall and the second portion includes a combustion bowl. The first portion can also include valve pockets formed therein to reduce weight. The upper wall has an undercrown surface directly opposite the second portion of the upper combustion surface. To enhance cooling, a center portion of the undercrown surface is concave, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston. The concave center portion is axially offset from the surrounding area of the undercrown surface.
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公开(公告)号：US10724466B2
公开(公告)日：2020-07-28
申请号：US15817405
申请日：2017-11-20
发明人： Jun-Kui Yang , Kwan-Ho Ryu , Jeong-Keun Lee , Ju-Hyun Sun , Sang-Bean Park , Jung-Hun Ji
IPC分类号： F02F3/00 , B23P15/10 , B23K1/00 , B23K1/008 , B23K101/00
摘要： There is provided a method for manufacturing a piston, including: a piston assembling step of forming a piston assembly by assembling a first piston part, a bonding member and a second piston part, wherein the first piston part has two or more bonding surfaces separate from each other and extending in a circumferential direction, and the second piston part has two or more bonding surfaces separate from each other and extending in the circumferential direction; a piston diffusion brazing step of diffusion brazing the first piston part, the bonding member and the second piston part under an open atmosphere by heating the formed piston assembly; and a piston cooling step of cooling a piston unit formed by diffusion brazing the first piston part, the bonding member and the second piston part. The piston diffusion brazing step is performed in a piston manufacturing device which includes a partially opened heating zone, a heater for providing heat into the heating zone, and a moving unit moved in one direction in the heating zone. In the piston diffusion brazing step, the piston assembly is heated while being moved at a predetermined speed through the heating zone in one direction by the moving unit.
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公开(公告)号：US10569325B2
公开(公告)日：2020-02-25
申请号：US15754601
申请日：2016-08-29
发明人： Eberhard Weiss
摘要： The invention discloses a method for producing an internal combustion engine piston having at least one cavity which is filled with an alkali metal cooling medium and is subsequently closed. The at least one cavity longitudinally extends from a central point into the piston body toward the piston circumference. The invention further discloses a piston produced according to the method.
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公开(公告)号：US10202937B2
公开(公告)日：2019-02-12
申请号：US15657018
申请日：2017-07-21
申请人： Federal-Mogul LLC
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless piston for an internal combustion engine and method of construction thereof are provided. The piston has a monolithic piston body extending along a central longitudinal axis. The piston body has an upper wall forming an upper combustion surface with first and second portions, with the first portion extending annularly along an outer periphery of the upper wall and the second portion forming a combustion bowl. The upper wall has an undercrown surface on an underside of the combustion bowl directly opposite the second portion of the upper combustion surface. The undercrown surface has an openly exposed surface area, as viewed looking along the central longitudinal axis, thereby providing an expansive area against which oil being splashed or sprayed can freely contact to cool the piston.
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