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公开(公告)号：US20230063658A1
公开(公告)日：2023-03-02
申请号：US17891836
申请日：2022-08-19
发明人： Hirotsugu Matsuda , Kenji Uchida
摘要： A piston structure of an engine includes a piston having a crown part including a crown surface defining a combustion chamber, and an opposite back surface, an oil jet, a center-side first cavity and an outer-circumference-side second cavity formed inside the crown part and partitioned from each other, each cavity including a ceiling surface on the combustion chamber side and an opposite bottom surface, a communicating hole that is formed in a partitioning wall between the cavities, an introduction hole that is formed in the bottom surface of the first cavity and introduces into the first cavity oil injected toward the back surface from the oil jet, and a discharge hole that is formed in the bottom surface of at least one cavity and discharges the oil. The ceiling surface of the second cavity is located on the combustion chamber side of the ceiling surface of the first cavity.
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公开(公告)号：US20230061913A1
公开(公告)日：2023-03-02
申请号：US17894948
申请日：2022-08-24
发明人： Hirotsugu Matsuda , Kenji Uchida
IPC分类号： F02F3/22
摘要： A piston structure of an engine is provided, which includes a piston having a crown part including a crown surface defining a combustion chamber and an opposite back surface, an oil jet that injects oil toward the back surface, a center side first cavity and an outer-circumference side second cavity that are formed inside the crown part and partitioned from each other. Each cavity includes a ceiling surface on the combustion chamber side and an opposite bottom surface. The structure also includes a communicating hole that is formed in a partitioning wall between the cavities and communicates the first cavity with the second cavity, an introduction hole that is formed in the bottom surface of the first cavity and into which oil injected toward the back surface is introduced, and a discharge hole that is formed in the bottom surface of the second cavity and discharges the oil.
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公开(公告)号：US11519358B2
公开(公告)日：2022-12-06
申请号：US17474954
申请日：2021-09-14
发明人： Airton Martins , Michael J. Badar , John Brooks , T. Vince Barbarie , Roberto Melena , Steve Scott
摘要： A diesel engine piston has a body and a crown engaged to the body with three inertially welded struts. The body includes a base extending downward opposite the crown with pin bosses having pin bores and a skirt extending downward from the base.
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公开(公告)号：US11313316B1
公开(公告)日：2022-04-26
申请号：US17406582
申请日：2021-08-19
申请人： TENNECO INC.
发明人： Ross Gladwin , Patrick Gyetvay , José Rebello , Norbert Schneider
摘要： A piston for an internal combustion engine is provided. The piston includes an open inner cooling area in which the undercrown surface is exposed, and an annular outer cooling gallery. The piston also includes an oil outlet scoop for local cooling of the undercrown surface of the piston. The outer cooling gallery includes an oil outlet opening, and the oil outlet scoop is beneath and vertically aligned with the oil outlet opening. The oil outlet scoop includes a concave surface facing the oil outlet opening. During operation, oil exits the oil outlet opening, and the oil outlet scoop catches the exiting oil and directs the oil to the inner cooling area and the exposed undercrown surface.
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公开(公告)号：US11111878B2
公开(公告)日：2021-09-07
申请号：US16666385
申请日：2019-10-28
发明人： Philipp Licht , Rainer Scharp
摘要： A piston of an internal-combustion engine may include a piston head and a piston skirt, a cooling duct circulating in the piston head, a boss for receiving a piston pin, and a feed hopper for supplying cooling oil into the cooling duct. The feed hopper may be fastened to another component of the piston via a retaining lug by at least one of a material closure, a force closure, and a positive closure.
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公开(公告)号：US20210003092A1
公开(公告)日：2021-01-07
申请号：US16978235
申请日：2019-03-04
摘要： A piston for an internal combustion engine has box walls (18), which are each formed between skirt walls (12) and gudgeon pin bosses (10). At least one of the box walls (18) on a thrust side at least on the lower edge and at least on the inner side, starting from the gudgeon pin boss (10), in a first portion (20), runs largely straight and is inclined outwards, and then runs curved inwards, and then, in a second portion (16), runs largely straight and inclined inwards to the skirt wall (12).
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公开(公告)号：US10753311B2
公开(公告)日：2020-08-25
申请号：US16511868
申请日：2019-07-15
发明人： Myung Sub Shin
摘要： A piston for an internal combustion engine includes: a crown; a skirt extending from the crown; an oil gallery extending annularly within the crown, and having an inlet and an outlet; and a structure mounted at the outlet of the oil gallery to induce oil shaking.
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公开(公告)号：US10738731B2
公开(公告)日：2020-08-11
申请号：US14988885
申请日：2016-01-06
发明人： Jeff Riffe , Michael Weinenger
摘要： A galleryless steel 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 defines a combustion bowl. The piston further includes undercrown surface located directly opposite the combustion bowl with an exposed 2-dimensional surface area allowing for contact of cooling oil. The exposed 2-dimensional surface area ranges from 25 to 60 percent of a cross-sectional area defined by a maximum outer diameter of the piston body. To further enhance cooling, a portion of the undercrown surface is concave or convex, such that oil is channeled during reciprocation of the piston from one side to the opposite side of the piston.
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公开(公告)号：US10590830B1
公开(公告)日：2020-03-17
申请号：US16168187
申请日：2018-10-23
发明人： Giorgio Candela , Fabio Numidi
摘要： An internal combustion engine (ICE) including an engine block including a plurality of cylinders, a piston arranged in each of the plurality of cylinders, and a piston cooling jet (PCJ) mounted to direct a flow of coolant at the piston in each of the plurality of cylinders. The PCJ includes an inlet, an outlet, and a controlled flow passage allowing a substantially continuous flow of coolant to pass from the inlet to the outlet.
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公开(公告)号：US20190323450A1
公开(公告)日：2019-10-24
申请号：US16470642
申请日：2017-12-19
发明人： Gerhard LUZ , Ingo ROTH , Eberhard WEISS
摘要： A piston for an internal combustion engine includes a piston upper part and a piston lower part having a cooling channel including at least one inlet opening. A dam-type elevation is formed in the region of the at least one inlet opening through forging of the dam elevation in the cooling channel portion in the piston lower part. In one example, a funnel-shaped inlet contour is formed in the inlet opening by pre-forging. In one example, a V-shaped element is formed in the piston upper part cooling chamber portion in alignment with the inlet opening and used as a coolant jet splitter.
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