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公开(公告)号：US11286877B2
公开(公告)日：2022-03-29
申请号：US16279394
申请日：2019-02-19
发明人： David J. Boye , Bryan Quinn , Joseph Stojkov , Joshua Cota , Scott D. Bailey
摘要： Methods for forging a piston blank are disclosed such that the forged piston blank is in a near-net shape and size of a final piston. Bending a flange to form a cooling channel can be done with reduced or no preliminary machining away of core material relative prior to bending the flange.
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公开(公告)号：US20210071617A1
公开(公告)日：2021-03-11
申请号：US17012758
申请日：2020-09-04
摘要： A proposed Adiabatic Diesel Engine (ADE), implements no cooling of the cylinders. The mechanism to achieve adiabatic cylinders is based on the separation of the crankcase mechanism from the cylinder mechanism. In an example implementation, the crankcase has a cross head mechanism driven by a connecting rod. The cross head mechanism drives the piston driveshaft(s) through a sliding bearing. The piston driveshaft moves between the crankcase and the cylinders. The cylinder has both a top where compression and combustion occur and a bottom with the piston driveshaft attached. The bottom has an opening for the piston driveshaft to move through. The bottom of the cylinder would normally be used to pump air for charging the combustion chamber. The crankcase mechanism contains lubricating oil and typically is cooled naturally through its casing.
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公开(公告)号：US20200340424A1
公开(公告)日：2020-10-29
申请号：US16962346
申请日：2018-11-28
申请人： Cummins Inc.
摘要： The present disclosure provides a piston, comprising: a skirt having an upper body portion; and a crown formed on the upper body portion by an additive manufacturing process, the crown including at least one air gap formed and positioned to reduce heat transfer from combustion to at least one cooling gallery formed in the piston.
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公开(公告)号：US10654029B2
公开(公告)日：2020-05-19
申请号：US16217623
申请日：2018-12-12
IPC分类号： B01J23/44 , C07F7/00 , B01J31/38 , C08F10/00 , C07C43/205 , C07C43/225 , C07C43/23 , B21K3/00 , B23P15/10 , F02F3/00 , F02F3/16 , F02F3/26 , B01J31/22 , F02F3/22
摘要： Disclosed are novel bridged bi-aromatic phenol ligands and transition metal catalyst compounds derived therefrom. Also disclosed are methods of making the ligands and transition metal compounds, and polymerization processes utilizing the transition metal compounds for the production of olefin polymers.
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公开(公告)号：US20190107076A1
公开(公告)日：2019-04-11
申请号：US15824504
申请日：2017-11-28
申请人： Lombardini S.R.L.
摘要： A piston and process for manufacturing a piston includes an upper part providing an upper combustion surface including a top land, a land ring and a combustion bowl. An undercrown surface is formed under the combustion bowl. A lower part including pin bosses and a piston skirt are formed under the undercrown surface. At least one of the upper part and the lower part are formed with metal injection molding.
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公开(公告)号：US10247132B2
公开(公告)日：2019-04-02
申请号：US15011852
申请日：2016-02-01
发明人： Gregory Salenbien , Miguel Azevedo
摘要： A piston for an internal combustion engine and method of construction thereof is provided. The piston has a piston body including an upper part and a lower part. The upper part has an upper combustion surface configured for direct exposure to combustion gases within a cylinder bore with an undercrown surface beneath the upper combustion surface. The body has a ring belt region configured for receipt of at least one piston ring adjacent the upper combustion surface with an annular cooling gallery configured radially inwardly from the ring belt region. The cooling gallery has a floor, wherein the floor has at least one through opening. A coolant medium is disposed in the cooling gallery, and a sealing member is disposed in the at least one through opening to seal off the coolant medium in the coolant gallery.
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公开(公告)号：US10221807B2
公开(公告)日：2019-03-05
申请号：US14411401
申请日：2013-06-24
摘要： The arrangement relates to a method for producing a cooling duct piston for an internal combustion engine, having the steps of producing a top piston part by introducing a combustion bowl, a cooling space of a part of a cooling duct and overflow ducts, producing a bottom piston part by introducing a part of a cooling duct, and joining the piston parts, wherein at least one transfer duct is created by bores. A cooling duct piston produced by the method is disclosed.
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公开(公告)号：US10174713B2
公开(公告)日：2019-01-08
申请号：US15276671
申请日：2016-09-26
申请人： ACHATES POWER, INC.
发明人： Eric P. Dion , Ryan G. Mackenzie
IPC分类号： F02F3/16 , F02F3/22 , F01P1/04 , F16J1/00 , F02F3/18 , F02B75/28 , F01P3/10 , F01P3/06 , F02F3/00
摘要： An opposed-piston engine includes pistons, each piston having an annular cavity in the piston's sidewall and positioned between its crown and ring grooves to block transfer of heat from the crown to the piston body.
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公开(公告)号：US10018148B2
公开(公告)日：2018-07-10
申请号：US14975451
申请日：2015-12-18
发明人： Michael Weinenger
CPC分类号： F02F3/22 , B23P15/10 , F02F3/00 , F02F3/0015 , F02F3/16 , F02F3/28 , F02F2003/0007 , F02F2003/0061 , F02F2200/04
摘要： A piston and method of construction thereof are provided. The piston includes an upper crown having an upper combustion surface and a lower crown depending therefrom. The lower crown includes a pair of laterally spaced, axially aligned pin bores configured for receipt of a wrist pin. A substantially closed, annular outer cooling gallery is formed between the upper and lower crowns, wherein a bottom surface of the cooling gallery is formed by a floor of the lower crown. An oil inlet and an oil outlet extend through the floor. The oil inlet includes an upstanding toroid-shaped protrusion that extends upwardly from the floor into the cooling gallery, wherein the protrusion is formed as a monolithic extrusion from the material of the lower crown floor.
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10.发明申请公开(公告)号：US20170320129A1
公开(公告)日：2017-11-09
申请号：US15528278
申请日：2015-11-20
发明人： Ulrich Bischofberger
CPC分类号： B22C9/105 , B22D15/02 , B22D21/007 , F02F3/16 , F02F3/22 , F02F3/28 , F02F2200/08
摘要： A method for producing a cooling channel piston may include producing a salt core blank by pressing and sintering a pure salt material having a surface roughness Rz of at most 60 μm. The method may also include one of immersing the salt core blank into a saturated solution of the salt material, or spraying the salt core blank with a saturated solution of the salt material. The method may also include drying the salt core blank to form a salt core having a surface roughness Rz of at least 200 μm. The method may further include placing the salt core in a casting mold, and casting the cooling channel piston from a metallic casting material.
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