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公开(公告)号：US5195478A
公开(公告)日：1993-03-23
申请号：US766379
申请日：1991-09-27
CPC分类号： F02F3/10 , F05C2201/021 , Y10T29/49263
摘要： Disclosed is a piston for an internal combustion engine, which includes a land portion, and a skirt portion including a non-coated portion which is formed in an arbitrary shape on a sliding portion thereof and a coated portion which is formed on a sliding portion thereof other than the sliding portion on which the non-coated portion is formed. When the piston is descending, an oil which has adhered on a cylinder bore is introduced into the non-coated portion and accordingly an oil film is established in the non-coated portion. Since the advantageous effects of the coated portion and the oil film are combined in the piston, the sliding resistance can be reduced remarkably. Hence, the coated portion can be inhibited from wearing out, and its function of the sliding resistance reduction can be maintained for a long period of time. In addition, since the non-coated portion does not work as a sliding surface, there arises a reduced sliding surface area which also results in the reduction of the sliding resistance. The non-coated portion and the coated portion can be formed with a resin by printing. If such is the case, they can be formed with ease and at a less production cost.
摘要翻译： 公开了一种用于内燃机的活塞，其包括陆部，以及裙部，其包括在其滑动部分上形成任意形状的未涂覆部分和形成在其滑动部分上的涂覆部分 除了形成有未涂覆部分的滑动部分之外。 当活塞下降时，附着在缸孔上的油被引入未涂覆部分，因此在未涂覆部分中建立油膜。 由于涂覆部分和油膜的有益效果组合在活塞中，因此可以显着降低滑动阻力。 因此，可以抑制涂布部分的磨损，并且可以长时间保持其滑动阻力降低的功能。 此外，由于未涂布部分不起滑动面的作用，因此滑动面积减小，滑动阻力降低。 未涂覆部分和涂覆部分可以通过印刷用树脂形成。 如果是这种情况，则可以容易地形成，并且以较少的生产成本。
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公开(公告)号：US5054375A
公开(公告)日：1991-10-08
申请号：US540638
申请日：1990-06-19
CPC分类号： F16J1/02 , F02F3/022 , F05C2201/021
摘要： A piston comprises a crown part, a piston under part, a first shoulder at a thrust side formed between the crown part and the piston under part, a second shoulder at an anti-thrust side formed between the crown part and the piston under part, a first in-low part at the thrust side formed in the piston under part, and a second in-low part at the anti-thrust side formed in the piston under part, wherein a thickness of the first shoulder is formed thinner than a thickness of the second shoulder, and a height of the first in-low part is formed smaller than a height of the second in-low part.
摘要翻译： 活塞包括冠部，活塞下部，在冠部和活塞下部之间的止推侧的第一肩部，形成在冠部和活塞下部之间的防推力侧的第二肩部， 形成在活塞下部的推力侧的第一低低部分和形成在活塞下部的防止侧的第二下部，其中形成第一肩部的厚度比厚度薄 并且所述第一低低部分的高度形成为小于所述第二低低部分的高度。
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3.发明授权
公开(公告)号：US5052281A
公开(公告)日：1991-10-01
申请号：US499893
申请日：1990-03-27
CPC分类号： F02F3/26 , F05C2201/021 , F05C2201/0448
摘要： A piston installed into a cylinder of an engine includes annular projections formed in axially spaced relation on a top land facing a cylinder inner wall and having a saw-toothed cross-section in which the external diameter of the projections are such that, when cold, that adjacent the lower end of the top land is greater than that adjacent the upper end thereof. Thereby the effective clearance between the top land face and the cylinder inner wall is reduced. This causes a reduction in the hydrocarbon content of the incompletely consumed combustion gas, and prevents the temperature from rising in the top ring groove and thus prevents the wearing of the groove.
摘要翻译： 安装在发动机气缸中的活塞包括在面向气缸内壁的顶部区域上以轴向隔开的关系形成的环形突起，并且具有锯齿形横截面，其中突出部的外径在冷时， 与顶部区域的下端相邻的位置大于邻近其上端的位置。 由此，能够减小顶面和气缸内壁之间的有效间隙。 这导致不完全消耗的燃烧气体的烃含量的降低，并且防止温度在顶环槽中上升，从而防止槽的磨损。
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公开(公告)号：US4870733A
公开(公告)日：1989-10-03
申请号：US165799
申请日：1988-03-09
申请人： Yasuhiro Kawabata , Soichi Hara
发明人： Yasuhiro Kawabata , Soichi Hara
CPC分类号： B22D19/0027 , F02F3/22 , F05C2251/042 , F05C2253/16 , Y10T29/49259 , Y10T29/4981 , Y10T29/49984
摘要： A manufacturing method of a piston in used for an internal combustion engine. The method comprises a step of reinforcing a circumference of a top ring groove by an inorganic fiber assembly, a step of forming an oil cooking gallery by a soluble core, a step of fixing the soluble core by projections formed in a strut preventing a thermal expansion of the piston, a step of setting the soluble core in a position supported by a punch mold, and step of setting the inorganic fiber assembly in an annular groove of a lower mold.
摘要翻译： 一种用于内燃机的活塞的制造方法。 该方法包括通过无机纤维组合件加强顶环槽的周长的步骤，通过可溶性芯形成油烹饪槽的步骤，通过形成在防止热膨胀的支柱中的突起固定可溶性芯的步骤 的步骤，将可溶性芯设置在由冲模模具支撑的位置的步骤，以及将无机纤维组件设置在下模的环形槽中的步骤。
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公开(公告)号：US5737838A
公开(公告)日：1998-04-14
申请号：US758858
申请日：1996-12-02
申请人： Hiromi Niimi , Yasuhiro Kawabata , Soichi Hara , Tomohiro Sawada
发明人： Hiromi Niimi , Yasuhiro Kawabata , Soichi Hara , Tomohiro Sawada
CPC分类号： B22D19/0027 , F02F3/003 , F02F2003/0061 , F05C2201/021 , F05C2201/0448 , Y10T29/49261
摘要： The method of making a piston unit for an internal combustion engine incorporates the steps of pinching a melting core in a mold cavity of a piston mold wherein the melting core includes an inner ring that forms a ring shaped passage within a piston body, an outer ring and a plurality of coupling portions connected with between the inner ring and the outer ring. The method further includes pouring molten metallic alloy into the cavity and solidifying therein, removing the outer ring of the melting core, filling the space left by removal of the outer ring with reinforced material, and then melting the inner ring and the coupling portions of the melting core.
摘要翻译： 制造用于内燃机的活塞单元的方法包括将熔化芯夹在活塞模具的模腔中的步骤，其中熔化芯包括在活塞体内形成环形通道的内环，外环 以及与内圈和外圈之间连接的多个联接部。 该方法还包括将熔融的金属合金浇注到空腔中并在其中固化，去除熔化芯的外环，通过用增强材料去除外环来填充剩余的空间，然后熔化内环和 熔芯。
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公开(公告)号：US4776075A
公开(公告)日：1988-10-11
申请号：US66714
申请日：1987-06-26
CPC分类号： B22D19/0027 , B22C21/14 , B22C9/105 , B22C9/108 , F02F3/22 , F02F2003/0061 , F05C2201/021 , F05C2201/0448 , Y10T29/49261 , Y10T29/49799
摘要： A method for manufacturing a piston of an internal combustion engine, especially for forming a piston gallery portion provided in the piston head for cooling the engine. A gallery member made of a metal pipe having a high thermal conductivity or a salt-core having a shape corresponding to the piston gallery is fixed to a fixing member having a peripheral rim and a plurality of fixing legs extended from the rim. The gallery member or the salt-core fixed to the fixing member is cast in the piston, body, and then, the fixing member is cut off from the piston body. The salt-core is melted away by pouring water. By this method, a piston of light weight and having high cooling efficiency can be manufactured.
摘要翻译： 一种用于制造内燃机的活塞的方法，特别是用于形成设置在活塞头中用于冷却发动机的活塞库部分。 由具有高导热性的金属管制成的画廊构件或具有与活塞筒相对应的形状的盐芯被固定到具有周缘的固定构件和从边缘延伸的多个固定腿。 固定在固定构件上的画廊构件或盐芯被铸造在活塞体内，然后将固定构件与活塞体切断。 盐芯通过倒水而熔化掉。 通过该方法，可以制造重量轻，冷却效率高的活塞。
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7.发明授权Piston assembly having a fusible core to form a cooling channel and a method for the manufacture thereof 失效具有可熔芯以形成冷却通道的活塞组件及其制造方法
公开(公告)号：US5014658A
公开(公告)日：1991-05-14
申请号：US482655
申请日：1990-02-21
申请人： Soichi Hara , Hiroshi Kageyama
发明人： Soichi Hara , Hiroshi Kageyama
CPC分类号： F02F3/22 , B22C9/108 , B22D15/02 , F01M2001/086 , F02F2003/0061 , F02F2200/06 , F05C2201/021
摘要： A piston is formed with a cooling channel in its crown by dissolving a fusible core cast into the crown. The fusible core is supported prior to casting by a strut which is itself supported on a plurality of cores which help to find the piston cavity. The plurality of cores are configured so as to be removable from the strut, after casting, in a downward direction. The fusible core is dissolved by introducing a dissolving liquid to the fusible core via inlet or outlet passages cut between the cavity and the fusible core.
摘要翻译： 活塞通过将可熔芯铸造溶解在表冠中而在其顶部形成有冷却通道。 在通过支撑件支撑熔丝芯之前，支柱本身被支撑在有助于找到活塞腔的多个芯上。 多个芯被构造成在铸造之后沿着向下的方向从支柱移除。 通过在空腔和可熔芯之间切割的入口或出口通道将溶解液引入可熔芯来溶解熔丝。
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公开(公告)号：US5996471A
公开(公告)日：1999-12-07
申请号：US106894
申请日：1998-06-30
申请人： Tomohiro Aikawa , Akinari Ishikawa , Soichi Hara
发明人： Tomohiro Aikawa , Akinari Ishikawa , Soichi Hara
CPC分类号： C22C21/04 , B22D15/02 , B22D21/007 , C22F1/043 , F05C2201/021 , F05C2251/042
摘要： An aluminum alloy for internal-combustion engine pistons has good high-temperature strength and good abrasion resistance. It comprises from 2 to 5% by weight of copper, from 13 to 16% by weight of silicon, from 0.2 to 1.3% by weight of magnesium, from 1.0 to 2.5% by weight of nickel from 0.05 to 0.2% by weight of vanadium and from 0.004 to 0.02% by weight of phosphorus, with the balance of aluminum. To produce the piston, a melt of the aluminum alloy having the defined composition is cast and then aged under heat at 220 to 260.degree. C. for 3 to 5 hours (T5 treatment) or, after having been cast, heated at 480 to 510.degree. C. for 3 to 10 hours for solution treatment and then aged under heat at 240 to 260.degree. C. for 3 to 5 hours (T6 or T7 treatment).
摘要翻译： 用于内燃机活塞的铝合金具有良好的高温强度和良好的耐磨性能。 它包含2至5重量％的铜，13至16重量％的硅，0.2至1.3重量％的镁，1.0至2.5重量％的镍，0.05至0.2重量％的钒 和0.004至0.02重量％的磷，余量为铝。 为了生产活塞，将具有规定组成的铝合金熔体浇铸，然后在220-260℃加热老化3至5小时（T5处理），或者在铸造之后，加热至480至510℃ ℃处理3〜10小时进行固溶处理，然后在240〜260℃下加热熟化3〜5小时（T6或T7处理）。
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