公开(公告)号：US5285840A

公开(公告)日：1994-02-15

申请号：US952349

申请日：1992-09-28

Applicant: Masamichi Hayashi ,  Yasuhiro Kawabata ,  Shiro Machida ,  Takanori Kamiya

Inventor： Masamichi Hayashi ,  Yasuhiro Kawabata ,  Shiro Machida ,  Takanori Kamiya

IPC: B22C9/24 ,  B22D17/00 ,  B22D17/22 ,  B22D19/00 ,  F02F3/00 ,  B22D19/02

CPC classification number: B22D19/0027 ,  F02F3/00 ,  F05C2201/021

Abstract: A piston is formed with a rib which is formed on a base portion and is formed with through holes which is formed in such manner that the core is in contact with a projection portions of a holding die.

Abstract translation: 活塞形成有肋，该肋形成在基部上并且形成有以使得芯与保持模的突出部接触的方式形成的通孔。

公开(公告)号：US4730548A

公开(公告)日：1988-03-15

申请号：US823480

申请日：1986-01-28

Applicant: Yorishige Maeda ,  Yoshiaki Tatematsu ,  Atsuo Tanaka ,  Shiro Machida

Inventor： Yorishige Maeda ,  Yoshiaki Tatematsu ,  Atsuo Tanaka ,  Shiro Machida

IPC: C22C47/06 ,  F02B1/04 ,  F02F3/08 ,  F02F7/00

CPC classification number: C22C47/06 ,  F02F3/08 ,  F02F7/0085 ,  B22F2998/10 ,  F02B1/04 ,  F05C2201/021 ,  F05C2201/0448 ,  F05C2251/042 ,  F05C2253/16

Abstract: A light metal alloy cast piston comprises a thermal strut provided in the shoulder portion of the piston skirt. The thermal strut is composed of a fiber reinforced metal portion containing high tensile strength fibers integrally molded in the matrix metal. The piston is shaped in such a manner that the inner periphery of the thermal strut is exposed toward the inside of the piston skirt, except for the regions at the piston pin bosses, to avoid the presence of non-reinforced metal a the inside of the thermal strut. This arrangement prevents the formation of cracks along the inner periphery of the thermal strut.

Abstract translation: 轻金属合金铸造活塞包括设置在活塞裙部的肩部中的热支柱。 热支柱由在基体金属中整体模制的高抗拉强度纤维的纤维增强金属部分组成。 活塞的形状使得除了活塞销凸起部分之外，热支柱的内周面朝向活塞裙部的内部露出，以避免非增强金属的存在， 热支柱 这种布置防止沿着热支柱的内周形成裂纹。

公开(公告)号：US4669367A

公开(公告)日：1987-06-02

申请号：US843626

申请日：1986-03-25

Applicant: Atsuo Tanaka ,  Yoshiaki Kajikawa ,  Yorishige Maeda ,  Shiro Machida ,  Tadashi Dohnomoto

Inventor： Atsuo Tanaka ,  Yoshiaki Kajikawa ,  Yorishige Maeda ,  Shiro Machida ,  Tadashi Dohnomoto

IPC: F02B1/04 ,  F02F3/04 ,  F02F7/00 ,  F02F3/08 ,  F16J1/01

CPC classification number: F02F7/0085 ,  F02F3/042 ,  F02F7/0087 ,  F02B1/04 ,  F05C2201/021 ,  F05C2201/0448 ,  F05C2251/042 ,  F05C2253/16

Abstract: A light metal alloy cast piston including a thermal strut (32, 48, 52) arranged in a shoulder portion of the piston skirt. The thermal strut is composed of an annular fiber-reinforced metal portion in which high-tensile-strength reinforcing fibers are integrally molded. The reinforcing fibers include first fibers (34), such as carbon fibers, having a coefficient of linear expansion substantially smaller than that of the matrix metal alloy, and second fibers (36), such as silicon carbide fibers and alumina fibers, having a flexural or bending strength larger than that of the first fibers. The first fibers primarily serve to restrain thermal expansion of the piston skirt and the second fibers, having a larger bending strength, act to protect the first fibers from excessive bending forces. In a preferred embodiment, the first fibers are located in the inner region of the thermal strut and the second fibers are arranged in the outer region.

Abstract translation: 一种轻金属合金铸造活塞，其包括布置在活塞裙部的肩部中的热支柱（32,48,52）。 热支柱由高强度增强纤维整体模制的环形纤维增强金属部分组成。 增强纤维包括具有比基体金属合金基本上小的线膨胀系数的第一纤维（34），例如碳纤维，以及具有挠曲的第二纤维（36），例如碳化硅纤维和氧化铝纤维 或弯曲强度大于第一纤维的弯曲强度。 主要用于抑制活塞裙部的热膨胀的第一纤维和具有较大弯曲强度的第二纤维用于保护第一纤维免受过度的弯曲力。 在优选实施例中，第一纤维位于热支柱的内部区域中，第二纤维布置在外部区域中。