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公开(公告)号：US20240271586A1
公开(公告)日：2024-08-15
申请号：US18535887
申请日：2023-12-11
申请人： Cummins Inc.
发明人： Raghuvaran Arumugam
摘要： Systems and apparatuses include a lubrication system having an engine piston defining a gudgeon pin aperture, a piston pooling cavity extending radially outward from the gudgeon pin aperture, a piston cooling gallery, and a piston lubrication passage. The piston lubrication passage is in fluid communication with the piston cooling gallery and the piston pooling cavity. The piston further includes a pin journal received in the gudgeon pin aperture of the engine piston and defining a journal aperture in fluid communication with the piston pooling cavity and a journal pooling cavity in fluid communication with the journal aperture. A gudgeon pin is received within the gudgeon pin aperture adjacent the pin journal, which provides fluid communication between the journal pooling cavity and the gudgeon pin.
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公开(公告)号：US11905912B2
公开(公告)日：2024-02-20
申请号：US16500813
申请日：2018-03-26
发明人： Frank-Peter Jung , Philipp Licht , Rainer Scharp
CPC分类号： F02F3/22 , F16J1/09 , F02F2003/0061 , F05C2201/0448
摘要： A piston of an internal combustion engine is disclosed. The piston includes a piston head with a piston bowl, a ring part and an annular cooling channel arranged between the ring part and the piston bowl. A closure element is provided to close the cooling channel in a direction away from the piston bowl. At least one guiding element is arranged in the cooling channel. The at least one guiding element provides a lug facing in a direction of an inner cooling channel wall and disposed at least partially circumferentially. The lug of the at least one guiding element is structured and arranged to direct cooling oil present in the cooling channel towards an upper region of the inner cooling channel wall relative to the closure element to facilitate cooling the upper region.
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公开(公告)号：US11846351B2
公开(公告)日：2023-12-19
申请号：US17983363
申请日：2022-11-08
发明人： Shaobo Zeng , Jianjun Zhu
摘要： A piston with an oil return channel may include a piston head, a piston skirt, and an oil return hole. The piston head may include a ring groove. The piston skirt may be connected to the piston head. The piston skirt may have a surface including a concave face window. A connection between the face window and the ring groove may form a residual ring bank. The oil return hole may be formed by milling on the residual ring bank. The oil return hole may connect the ring groove close to the piston skirt with the face window. A depth of the oil return hole may be greater than a depth of the ring groove.
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公开(公告)号：US11746725B2
公开(公告)日：2023-09-05
申请号：US17630733
申请日：2020-01-17
申请人： Tenneco Inc.
CPC分类号： F02F3/14 , F02F3/22 , F02F3/26 , F02F2003/0061
摘要： A piston for an internal combustion engine which is coated for enhanced oxidation protection and/or erosion protection is provided. The piston includes a body formed of an iron-based material. The iron-based material is coated with a superalloy and manganese phosphate. The superalloy is preferably NiCrAlY, NiCrAl, NiCr, CoCrAly, and/or CoNiCrAlY. The manganese phosphate can be disposed on the superalloy, but not between the superalloy and the iron-based material. The superalloy preferably has a thickness of 0.1 to 2.0 mm, a porosity of 1% to less than 5%, and a surface roughness of less than 5 microns Ra. Another component for an internal combustion engine which is coated with the superalloy and the manganese phosphate is also provided.
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公开(公告)号：US11732672B2
公开(公告)日：2023-08-22
申请号：US17373173
申请日：2021-07-12
摘要： A reciprocating engine includes a crankshaft and a connecting rod rotatably coupled to the crankshaft. The connecting rod defines a fluid passage extending along a length thereof. The reciprocating engine also includes a piston dome coupled to the connecting rod, the piston dome defining an inlet in fluid communication with the fluid passage of the connecting rod for receiving a fluid from the fluid passage of the connecting rod, a cooling passage in fluid communication with the inlet for circulating the fluid through the piston dome, and an exit in fluid communication with the cooling passage.
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公开(公告)号：US11713729B2
公开(公告)日：2023-08-01
申请号：US17486809
申请日：2021-09-27
发明人： Junzhuo Liu , Zhenfei Ma , Defeng Song , Siyan Wang
IPC分类号： F02F3/22
CPC分类号： F02F3/22
摘要： A piston may include a splitting internal cooling runner, an end portion recessed inward to form a combustion chamber, and an annular internal cooling runner at least partially surrounding the combustion chamber. A wall of the annular internal cooling runner may partially protrude in a direction away from the end portion to form an annular splitting portion which divides the annular internal cooling runner into an outer half cavity and an inner half cavity.
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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：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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