-
公开(公告)号：US20170299056A1
公开(公告)日：2017-10-19
申请号：US15131641
申请日：2016-04-18
发明人： MIGUEL AZEVEDO , MATTHEW BELFORD , GREG SALENBIEN
摘要： A piston ring includes a body portion presenting a running surface, and a spring member disposed between the body portion and a ring groove of a piston. A running surface of the piston ring presents an upper rail, a lower rail, and a fulcrum disposed between the rails and each extending radially outwardly. An outermost tip of the fulcrum is disposed radially outwardly relative to an outermost surface of the rails, and the running surface presents a convex shape along the fulcrum. The fulcrum contacts an oil film applied to a cylinder wall as the piston reciprocates along the cylinder wall. The spring member presses the body portion of the piston ring toward the cylinder wall and causes the body portion to pivot about the fulcrum to provide for improved control of the oil film, less friction, and reduced oil consumption.
-
公开(公告)号：US20160138714A1
公开(公告)日：2016-05-19
申请号：US15002753
申请日：2016-01-21
CPC分类号： F16J9/02 , B23P15/06 , B23P15/065 , F16J9/14 , Y10T29/49284
摘要： The invention provides a low tension piston ring having a finished outer diameter and negligible tangential tension. The method includes the steps of machining a stock bar to an initial outer diameter slightly greater than the finished outer diameter of the piston ring, finishing the initial outer diameter of the stock bar to a rounded profile having a nominal diameter equal to the finished outer diameter, and machining the stock bar to the preferred cross-section. Dykes-type piston rings can have keystone or semi-keystone shaped cross-sections. The method continues by detaching the piston ring from the stock bar using a parting tool in response to completing all tension inducing operations including the steps recited above. The method continues with the steps of lapping the piston ring to a final longitudinal thickness and cutting the piston ring longitudinally to form a final gap.
摘要翻译： 本发明提供了具有最终外径和可忽略的切向张力的低拉力活塞环。 该方法包括以下步骤：将坯料坯加工到初始外径略大于活塞环的最终外径，将坯条的初始外径完成为具有等于最终外径的公称直径的圆形轮廓 ，并将坯料加工到优选的横截面。 Dykes型活塞环可以具有梯形或半梯形截面。 响应于完成包括上述步骤的所有张力诱导操作，使用分型工具将活塞环从坯料棒分离出来。 该方法继续以将活塞环研磨至最终纵向厚度并纵向切割活塞环以形成最终间隙的步骤。
-
公开(公告)号：US20170145952A1
公开(公告)日：2017-05-25
申请号：US15354001
申请日：2016-11-17
CPC分类号： F02F3/14 , C23C4/02 , C23C4/06 , C23C4/073 , C23C4/10 , C23C4/11 , C23C4/12 , C23C4/126 , C23C4/18 , C23C28/321 , C23C28/3215 , C23C28/3455 , C23C28/36 , F02F3/0084 , F02F3/26
摘要： A piston for a diesel engine is provided. The piston includes a thermal barrier coating applied to a crown formed of steel. A layer of a metal bond material is first applied to a combustion surface of the crown, followed by a gradient structure including a mixture of the metal bond material and a ceramic material, followed by a layer of the ceramic material. The ceramic material includes at least one of ceria, ceria stabilized zirconia, yttria stabilized zirconia, calcia stabilized zirconia, magnesia stabilized zirconia, and zirconia stabilized by another oxide. The thermal barrier coating is applied by a thermal spray process or HVOF. The thermal barrier coating has a porosity of 2% by vol. to 25% vol., based on the total volume of the thermal barrier coating, a thickness of less than 1 mm, and a thermal conductivity of less than 1.00 W/m·K.
-
4.发明申请REDUCED COMPRESSION HEIGHT PISTON AND PISTON ASSEMBLY THEREWITH AND METHODS OF CONSTRUCTION THEREOF 审中-公开降低压缩高度活塞和活塞组件及其构造方法公开(公告)号：US20150336223A1
公开(公告)日：2015-11-26
申请号：US14817385
申请日：2015-08-04
发明人： MIGUEL AZEVEDO , MICHAEL WEINENGER
CPC分类号： B23P15/08 , F02F3/00 , F02F3/0069 , F02F3/16 , F02F2200/00 , F16J1/005 , F16J1/09 , F16J1/16 , F16J7/00 , Y10T29/49249 , Y10T29/49268
摘要： A piston assembly and method of construction thereof for an internal combustion engine are provided. The assembly includes a piston head having an upper combustion wall with an undercrown surface and a ring belt region. The piston head has a floor with an upper surface and a bottom surface. The floor is spaced beneath the upper combustion wall in radial alignment with the ring belt region. A substantially enclosed, annular cooling gallery is bounded by the undercrown surface and the floor. A pair of pin bores depends directly from the floor of the cooling gallery. The assembly further includes a pin having ends configured for oscillating receipt in the pin bores. A pin bearing surface extends within the pin bores and between the pin bores in the lower surface of the floor. The assembly includes a connecting rod with an end fixed to the pin for conjoint oscillation therewith.
摘要翻译： 提供一种用于内燃机的活塞组件及其构造方法。 该组件包括具有具有下凸表面和环带区域的上燃烧壁的活塞头。 活塞头具有具有上表面和底表面的底板。 地板在上燃烧壁下方与环带区域径向对准。 一个基本封闭的环形冷却廊由底下的表面和地板界定。 一对销孔直接从冷却库的地板上取下。 组件还包括具有构造成用于在销孔中摆动收据的端部的销。 销轴承表面在销孔内部延伸并且在底板的下表面中的销孔之间延伸。 该组件包括连接杆，其端部固定到销上以与其一起振动。
-
公开(公告)号：US20180209375A1
公开(公告)日：2018-07-26
申请号：US15414954
申请日：2017-01-25
摘要： A steel piston with anti-coking design features is provided. The piston includes an upper crown portion and a lower crown portion forming an outer cooling gallery therebetween. The outer cooling gallery is substantially closed except for an oil inlet, oil outlet, and optional oil passage(s) to a central cooling gallery. According to one embodiment, at least one anti-coking insert is disposed in the outer cooling gallery and sized to prevent escaping through the oil inlet or the oil outlet. For example, the insert(s) can comprise a helical coil, a plurality of steel balls, coil springs, or chips formed of polymer with abrasive filler. Alternatively, an outer gallery floor to the outer cooling gallery includes a plurality of anti-coking openings disposed sequentially in decreasing spaced relation from one another, or anti-coking openings with varying lengths.
-
公开(公告)号：US20170145914A1
公开(公告)日：2017-05-25
申请号：US15354080
申请日：2016-11-17
摘要： A component for exposure to a combustion chamber of a diesel engine and/or exhaust gas, such as a cylinder liner or valve face, is provided. The component includes a thermal barrier coating applied to a body portion formed of steel. A layer of a metal bond material is first applied, followed by a gradient structure including a mixture of the metal bond material and a ceramic material, followed by a layer of the ceramic material. The ceramic material includes at least one of ceria, ceria stabilized zirconia, yttria stabilized zirconia, calcia stabilized zirconia, magnesia stabilized zirconia, and zirconia stabilized by another oxide. The thermal barrier coating is applied by thermal spray or HVOF. The thermal barrier coating has a porosity of 2% by vol. to 25% vol., a thickness of less than 1 mm, and a thermal conductivity of less than 1.00 W/m·K.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.012 秒)
