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公开(公告)号：US20220356834A1
公开(公告)日：2022-11-10
申请号：US17661778
申请日：2022-05-03
申请人： Cummins Inc.
发明人： Adam C. Cecil
摘要： Pistons and piston assemblies for an internal combustion engine is provided. The piston assembly includes a piston coupled to a connecting rod with a piston pin. The piston pin includes a non-circular outer cross-sectional shape.
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公开(公告)号：US11067033B2
公开(公告)日：2021-07-20
申请号：US15980595
申请日：2018-05-15
申请人： FEDERAL-MOGUL LLC
摘要： A piston capable of operating at a high temperature and consequently contributing to a high in-cylinder temperature, as well as reducing engine oil temperature, when used in an internal combustion engine, is provided. The piston includes an upper portion and a lower portion welded together to present a cooling gallery therebetween. The cooling gallery extends circumferentially around a center axis of the piston and is spaced the center axis. A partition is located in the cooing gallery and extends from one inner surface to another inner surface of the cooling gallery. The partition extends circumferentially around the center axis, and divides the cooling gallery into at least a first gallery portion and a second gallery portion. The partition can be formed as one piece with the upper portion or the lower portion. Alternatively, the partition can be formed as a separate piece from the upper portion and the lower portion.
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公开(公告)号：US11022065B2
公开(公告)日：2021-06-01
申请号：US15364616
申请日：2016-11-30
摘要： A heavy duty piston for an internal combustion engine comprises a thermally conductive composition filling 10 to 90 vol. % of a sealed cooling gallery. The thermally conductive composition includes bismuth and/or tin. For example, the thermally conductive composition can be a single-phase binary mixture of bismuth and tin. The thermally conductive composition has improved thermal properties, for example a melting point around 139° C., a thermal conductivity around 22 W/m·K, and a thermal diffusivity around 1.43E-5 m2/s. The thermally conductive composition is not reactive and does not include toxic or cost-prohibitive metals. During high temperature operation, as the piston reciprocates in the cylinder bore, the thermally conductive composition flows throughout the cooling gallery to dissipate heat away from the upper crown and thus improve efficiency of the engine.
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公开(公告)号：US10927788B2
公开(公告)日：2021-02-23
申请号：US15611461
申请日：2017-06-01
摘要： A piston of an internal combustion engine may include a piston shaft and a piston head. The piston head may be provided with a closed cooling channel with a cooling medium arranged therein. The piston shaft may have a spherically round cross-sectional shape, wherein a deviation from the roundness with respect to a piston diameter may be less than 0.5 per thousand.
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5.发明申请公开(公告)号：US20170335792A1
公开(公告)日：2017-11-23
申请号：US15598564
申请日：2017-05-18
申请人： Federal-Mogul LLC
CPC分类号： F02F3/10 , C23C30/00 , F02F3/0069 , F02F3/18 , F02F2200/00 , F05C2251/048
摘要： A vehicle internal combustion piston and method of construction thereof are provided. The piston includes piston body extending along a central longitudinal axis, having an upper combustion wall forming an upper combustion surface and an undercrown surface opposite the upper combustion surface. An annular ring belt region depends from the upper combustion surface, a pair of skirt panels depend from the ring belt region, and a pair of pin bosses depend from the undercrown surface to provide laterally spaced pin bores aligned along a pin bore axis for receipt of a wrist pin. The undercrown surface forms a central undercrown surface, and a portion of either an open outer cooling gallery, a sealed outer cooling gallery, or an outer galleryless region, wherein an insulating coating is applied to at least one of the portions of the undercrown surface.
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公开(公告)号：US20170232501A1
公开(公告)日：2017-08-17
申请号：US15426724
申请日：2017-02-07
发明人： Rajiv SHIVPURI
CPC分类号： B21K1/185 , B23P15/10 , F02F3/18 , F02F3/22 , F02F2200/04
摘要： A piston, particularly a piston for use in a diesel engine, particularly a heavy duty diesel engine, is formed from a billet of metal, such that the finished piston has a mass that is at least 50%, and, more preferably, up to about 62%, of the mass of the billet. Other than finishing steps, the piston is formed with a closed gallery, without loss of mass through machining processes.
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公开(公告)号：US20170159604A1
公开(公告)日：2017-06-08
申请号：US15364616
申请日：2016-11-30
摘要： A heavy duty piston for an internal combustion engine comprises a thermally conductive composition filling 10 to 90 vol. % of a sealed cooling gallery. The thermally conductive composition includes bismuth and/or tin. For example, the thermally conductive composition can be a single-phase binary mixture of bismuth and tin. The thermally conductive composition has improved thermal properties, for example a melting point around 139° C., a thermal conductivity around 22 W/m·K, and a thermal diffusivity around 1.43 E-5 m2/s. The thermally conductive composition is not reactive and does not include toxic or cost-prohibitive metals. During high temperature operation, as the piston reciprocates in the cylinder bore, the thermally conductive composition flows throughout the cooling gallery to dissipate heat away from the upper crown and thus improve efficiency of the engine.
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公开(公告)号：US20150315995A1
公开(公告)日：2015-11-05
申请号：US14700654
申请日：2015-04-30
发明人： Michael Weinenger
CPC分类号： F02F3/18 , B23P15/10 , F02F3/0092 , F05C2201/021 , F05C2201/0448 , Y10T29/4925 , Y10T29/49254
摘要： A steel piston for an internal combustion including a cooling gallery containing a solid coolant, such as an aluminum-based material, is provided. The solid coolant has a thermal conductivity which is greater than the thermal conductivity of the steel material and fills at least 15 volume percent (vol. %) of the cooling gallery. The solid coolant provides for exceptional cooling along a crown of the piston, reduces corrosion and erosion along the crown, and avoids the problem of oil coking.
摘要翻译： 提供了一种用于内燃的钢活塞，其包括包含固体冷却剂的冷却库，例如铝基材料。 固体冷却剂的导热率大于钢材的热导率，并填充至少15体积百分比（体积百分比）的冷却库。 固体冷却剂可以沿着活塞的顶部提供特殊的冷却，减少沿表冠的腐蚀和侵蚀，并避免油焦化问题。
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9.发明申请公开(公告)号：US20130312695A1
公开(公告)日：2013-11-28
申请号：US13995017
申请日：2011-12-15
申请人： Ulrich Bischofberger
发明人： Ulrich Bischofberger
IPC分类号： F02F3/18
摘要： The present invention relates to a piston (10) for an internal combustion engine, comprising a piston head (11) and a piston skirt (16), wherein the piston head (11) has a circumferential ring part (15) and a circumferential cooling channel (23) in the region of the ring part (15), wherein the piston skirt (16) has piston bosses (17), which are provided with boss bores (18) and which are arranged on the underside (11a) of the piston head (11) by means of boss connections (19), wherein the piston bosses (17) are connected to each other by means of running surfaces (21, 22). According to the invention, at least one axial bore (24a, 24b, 24c, 24d), which is closed to the outside and which is arranged between a running surface (21, 22) and a boss bore (18), is provided inside a piston boss (17), the at least one bore (24a, 24b, 24c, 24d) opens into the cooling channel (23), and the cooling channel (23) and the at least one bore (24a, 24b, 24c, 24d) contain a filling (27) of sodium and/or potassium.
摘要翻译： 本发明涉及一种用于内燃机的活塞（10），其包括活塞头（11）和活塞裙（16），其中活塞头（11）具有圆周环部分（15）和周向冷却 在所述环形部分（15）的区域中的所述通道（23），其中所述活塞裙部（16）具有活塞凸起（17），所述活塞凸起（17）设置有凸起孔（18） 活塞头（11）通过凸台连接件（19）连接，其中活塞凸台（17）通过运行表面（21,22）相互连接。 根据本发明，在外部设置有至少一个轴向孔（24a，24b，24c，24d），该轴向孔（24a，24b，24c，24d）设置在行进表面（21,22）和凸台孔（18）之间， 活塞凸台（17），所述至少一个孔（24a，24b，24c，24d）通向所述冷却通道（23），所述冷却通道（23）和所述至少一个孔（24a，24b，24c， 24d）含有钠和/或钾的填充物（27）。
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公开(公告)号：US07743745B2
公开(公告)日：2010-06-29
申请号：US11791777
申请日：2005-11-28
申请人： Rainer Scharp
发明人： Rainer Scharp
IPC分类号： F02F3/18
CPC分类号： F02F3/22 , F02F3/0023
摘要： Disclosed is a multipart, cooled piston for a combustion engine, comprising, in a radially outward direction, an annular cooling duct located on the bottom side that faces away from the piston head. The cooling duct is closed by a cooling duct cover which is embodied as a ring. The cooling duct cover is provided with a tongue in the radially inner zone. The tongue engages into a recess that is molded into the bottom piston part, thus preventing the cooling duct cover from rotating relative to the piston during assembly as well as during operation.
摘要翻译： 公开了一种用于内燃机的多部分冷却活塞，其包括在径向向外的方向上的位于底面上的背离活塞头的环形冷却管道。 冷却管道通过体现为环的冷却管道盖封闭。 冷却管道盖在径向内部区域中设置有舌部。 舌部接合到模制到底部活塞部分中的凹部中，从而防止冷却管道盖在组装期间以及在操作期间相对于活塞旋转。
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