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公开(公告)号：US20180230937A1
公开(公告)日：2018-08-16
申请号：US15751277
申请日：2016-08-11
发明人： Matthias Laqua
CPC分类号： F02F3/20 , B21K1/18 , B21K1/185 , B23P15/10 , F02F3/22 , F02F2003/0007 , F02F2200/04 , F16J1/001
摘要： Disclosed is a monoblock or cooling channel piston and a method for producing a monoblock piston for use in an internal combustion engine. A piston blank includes a circumferential collar protruding radially in the region of the piston crown is first produced and the collar is then shaped. A contact region on a top region of the piston skirts and the collar is shaped such that the outer circumferential edge thereof points at a distance to the contact region and forms a defined gap. The gap is then sealed by a closure element in order to form a closed cooling channel.
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公开(公告)号：US09903309B2
公开(公告)日：2018-02-27
申请号：US14988509
申请日：2016-01-05
发明人： Michael T. Lapp , Alex Antoc , Luiz Perrone , Dietmar Spindler
CPC分类号： F02F3/003 , B23K20/12 , B23P15/10 , F02F3/0015 , F02F3/20 , F02F2003/0061 , F16J1/005 , Y10T29/49826
摘要： A pre-finished piston part is disclosed that may be used to form a piston assembly. A pre-finished piston may include a lower part defining a piston axis, the lower part having a skirt and forming a lower surface of a cooling gallery. The lower part may include a radially inner bowl surface defining a lower part radially inner mating surface. The pre-finished piston assembly may further include an upper part having a radially outer bowl surface meeting the radially inner bowl surface at a radially inner joint. The upper part may include a radially inner wall defining a radially inner upper part mating surface. The radially inner wall may define a radially inwardly facing surface that defines a non-parallel angle with the radially inner bowl surface where the radially inner bowl surface meets the radially innermost edge of the radially inner mating surface.
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公开(公告)号：US20170254291A1
公开(公告)日：2017-09-07
申请号：US15445317
申请日：2017-02-28
申请人： FEDERAL-MOGUL LLC
CPC分类号： F02F3/22 , B23P15/10 , F01M9/06 , F01M11/0004 , F01M2011/0033 , F01P3/08 , F01P2003/006 , F02F3/0092 , F02F3/20 , F02F2003/0007 , F02F2200/00 , F02F2200/04 , F02F2200/06
摘要： A galleryless piston including a ring belt with three ring grooves is provided. Each ring groove is formed by an uppermost wall and a lower wall spaced from one another by a back wall. A pair of pin bosses depend from the upper wall, and pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. An inner undercrown region is surrounded by the skirt panels and the struts and the pin bosses. A pair of outer pockets extend along the undercrown surface, and each outer pocket is surrounded by a portion of the ring belt and one of the pin bosses and the struts coupling the one pin boss to the skirt panels. The third ring groove includes an oil drain slot extending through the back wall to the outer pockets of the piston for conveying cooling oil.
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公开(公告)号：US20170241374A1
公开(公告)日：2017-08-24
申请号：US15437631
申请日：2017-02-21
申请人： FEDERAL-MOGUL LLC
发明人： Thomas Scherbaum , Sven Ungermann , Harald Mergler , Josef Harrer , Michael Seiffert , Georg Hopp , Arnd Baberg , Hanno Necker , Michael Weinenger , Jeffrey L. Riffe
CPC分类号： F02F3/22 , F02F3/0076 , F02F3/0084 , F02F3/20 , F02F2200/06
摘要： A galleryless piston having a reduced temperature during operation in an engine is provided. The piston includes an upper wall with an exposed undercrown surface. A ring belt and pin bosses depend from the upper wall, and a pair of skirt panels depend from the ring belt and are coupled to the pin bosses by struts. The piston includes an inner undercrown region and outer pockets extending along the undercrown surface. The inner undercrown region is surrounded by the skirt panels, the struts, and the pin bosses. Each outer pocket is surrounded by one of the pin bosses, a portion of the ring belt, and the struts adjacent the one pin boss. A plurality of holes extend through the pin bosses and/or the struts from the inner undercrown region to one of the outer pockets to convey cooling oil from the inner undercrown region to the outer pockets.
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公开(公告)号：US09726109B2
公开(公告)日：2017-08-08
申请号：US14395237
申请日：2013-04-15
发明人： Sascha-Oliver Boczek
摘要： A piston for an internal combustion engine may include an encircling ring section in a region of a piston crown. The piston may include a convection region, which has at least one cavity containing a heat transfer medium for dissipation of heat from the piston crown to an underside of the piston. The piston may include a heat insulating region, which is arranged between the ring section and the convection region and thermally insulates the ring section.
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公开(公告)号：US20170211459A1
公开(公告)日：2017-07-27
申请号：US15412457
申请日：2017-01-23
发明人： Nicolae Muscas
CPC分类号： F02F3/20 , F01P3/22 , F02F3/0076 , F02F3/02 , F02F3/22 , F02F2003/0061 , F02F2200/00
摘要： A piston with a cooling gallery containing an open cell radiator is provided. The radiator has a large thermally conductive surface area that acts as a heat-sink to remove heat from the piston. Heat from the piston is transmitted from the radiator to cooling oil that enters the cooling gallery via an oil inlet formed in a floor of the cooling gallery and exits the cooling gallery via an oil outlet. The piston comprises a piston body including an upper part presenting an upper combustion surface and an undercrown surface. A ring belt depends from the upper combustion surface, and the cooling gallery extends around the piston body beneath the undercrown surface radially inwardly of the ring belt. The radiator includes a plurality of fins extending annularly around the cooling gallery. The fins of the radiator are spaced from one another by gaps extending annularly around the cooling gallery.
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公开(公告)号：US09689343B2
公开(公告)日：2017-06-27
申请号：US14418435
申请日：2013-07-31
发明人： Michael Ullrich
摘要： A piston for an internal combustion engine may include an at least partially extending circumferential cooling duct for circulating a coolant. The coolant duct may be closed by a cooling duct cover apart from an inlet opening and an outlet opening. The inlet opening and the outlet opening may be arranged in the cooling duct cover. A guide element may be disposed in a region of the inlet opening configured to catch an incident coolant jet. The guide element may guide the coolant jet into the cooling duct and deflect the coolant jet in precisely a circumferential direction along the cooling duct.
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公开(公告)号：US20160258382A1
公开(公告)日：2016-09-08
申请号：US14638339
申请日：2015-03-04
CPC分类号： F02F3/003 , B21K1/185 , F02F3/0069 , F02F3/025 , F02F3/20 , F02F3/22 , F02F3/26 , F02F2003/0007 , F02F2003/0061
摘要： Exemplary pistons and methods of making the same are disclosed. An exemplary piston may include a crown defining a combustion bowl and a ring land extending circumferentially around the combustion bowl. Exemplary pistons may further include a skirt supporting the crown. The skirt may include a pair of pin bosses defining a pin bore configured to receive a piston pin, and two opposing skirt supports defining surfaces configured to slide along a cylinder bore surface. The skirt supports each define a different radial stiffness.
摘要翻译： 公开了示例性活塞及其制造方法。 示例性的活塞可以包括限定燃烧碗的表冠和围绕燃烧碗周向延伸的环形区域。 示例性活塞还可以包括支撑冠部的裙部。 裙部可以包括限定被构造成接收活塞销的销孔的一对销凸起，以及限定被构造成沿着缸孔表面滑动的表面的两个相对的裙部支撑件。 裙部支撑件各限定不同的径向刚度。
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公开(公告)号：US20150040846A1
公开(公告)日：2015-02-12
申请号：US14449475
申请日：2014-08-01
发明人： Yoshitsugu Gokan , Tomokazu Kobayashi , Takayuki Osako , Masatoshi Ito , Kenichi Nishimura , Keiji Yamamoto , Masaki Sabato
CPC分类号： F01P3/10 , B01D35/005 , F01M1/08 , F01P1/04 , F01P3/08 , F02B2075/025 , F02F1/22 , F02F3/20
摘要： A piston cooling apparatus includes: a main body including a communication passage communicating with an oil path formed in an internal combustion engine; a nozzle pipe portion including an oil injection port configured to inject oil having passed through the communication passage toward a piston; and a filter disposed upstream of the nozzle pipe portion on the flow passage of the oil and including a hole having a smaller diameter than the minimum diameter of the oil injection port, the oil being injected toward the piston from the oil injection port, wherein: the filter is removably mounted on the outer surface of the outer wall portion of the main body existing upstream on the oil flow passage; and the main body is mounted on the internal combustion engine in a state where at least a portion of the filter is inserted into the oil path.
摘要翻译： 活塞冷却装置包括：主体，包括与形成在内燃机中的油路连通的连通通道; 喷嘴管部，其包括注油口，所述注油口构造成将通过所述连通通道的油朝向活塞注入; 以及过滤器，其设置在所述油的流路上的所述喷嘴管部的上游，并且具有直径小于所述喷油口的最小直径的孔，所述油从所述喷油口朝向所述活塞喷射，其中： 过滤器可移除地安装在存在于油流动通道上游的主体外壁部分的外表面上; 并且在将过滤器的至少一部分插入到油路中的状态下将主体安装在内燃机上。
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公开(公告)号：US20150027400A1
公开(公告)日：2015-01-29
申请号：US14383226
申请日：2013-03-06
发明人： Jochen Adelmann , Ralf Braig , Michael Marquardt
CPC分类号： F02F3/0084 , F01P3/10 , F02F3/20 , F02F3/22 , F02F2003/0007
摘要： A cast light metal piston for an internal combustion engine may include a piston crown and a piston skirt adjoining the piston crown. The piston skirt may include two skirt walls arranged on a pressure side and a counterpressure side, respectively. The piston skirt may have two box walls connecting the skirt walls, which conically taper towards one another in a direction of the piston crown. The piston may include an annularly encircling cooling channel. A thickness of the piston crown may amount to a maximum of 4.5 mm.
摘要翻译： 用于内燃机的铸造轻金属活塞可以包括活塞冠和毗邻活塞冠的活塞裙。 活塞裙部可以包括分别设置在压力侧和反压侧的两个裙壁。 活塞裙部可以具有连接裙壁的两个盒壁，其在活塞冠的方向上相互锥形。 活塞可以包括环形环绕的冷却通道。 活塞顶部的厚度可以达到最大4.5mm。
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