公开(公告)号：US07275521B2

公开(公告)日：2007-10-02

申请号：US11153166

申请日：2005-06-15

Applicant: Masayoshi Usui ,  Kikuo Asada ,  Yasuaki Hashimoto ,  Hiroyuki Nishizawa ,  Iichiro Seino

Inventor： Masayoshi Usui ,  Kikuo Asada ,  Yasuaki Hashimoto ,  Hiroyuki Nishizawa ,  Iichiro Seino

IPC: F02M55/02 ,  F02M55/00

CPC classification number: F02M55/005 ,  F02M55/02 ,  F02M55/025 ,  F16L41/14

Abstract: A joint structure connects a diverging branch pipe to a fuel rail for an internal combustion engine. The fuel rail is stainless steel or steel with rust prevention processing on at least the inner face. The diverging branch pipe is a double pipe with inner and outer pipes. The inner pipe has excellent rust preventing ability with respect to fuel on its inner face in comparison with the outer face of the outer pipe. The inner and outer pipes are connected by a nut for fastening through a joint fitting. A connecting seal portion of the diverging branch pipe and the joint fitting has rust preventing ability equal to that of the inner circumferential face of the diverging branch pipe. An entire liquid contact portion, including a seal face of the diverging branch pipe with respect to the fuel is covered with the inner pipe.

Abstract translation: 连接结构将发散支管连接到用于内燃机的燃料轨。 燃油轨至少在内表面上是不锈钢或防锈处理的钢。 分支管是具有内管和外管的双管。 内管与外管的外表面相比，内管上的燃料具有优异的防锈能力。 内管和外管通过螺母连接，用于通过接头配件紧固。 发散支管和接头配件的连接密封部分具有与发散分支管的内周面相同的防锈能力。 包括发散支管相对于燃料的密封面的整个液体接触部分被内管覆盖。

公开(公告)号：US06918378B2

公开(公告)日：2005-07-19

申请号：US10616841

申请日：2003-07-10

Applicant: Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

Inventor： Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

IPC: F02M55/02

CPC classification number: F02M55/02 ,  F02M2200/8046 ,  F02M2200/8053 ,  F02M2200/9053 ,  F02M2200/9061 ,  Y10T29/49432

Abstract: In a high pressure fuel injection pipe, pipe extension and heat treatment are repeated by using a header manufactured by transformation induced plastic type strength steel. A process for depositing residual austenite is then performed, after which a final pipe extension process is performed, and the joint portion is molded and bending processing is performed without performing perfect annealing at the size of a product.

Abstract translation: 在高压燃油喷射管中，通过使用由转化诱导塑料型强度钢制成的集管重复管延伸和热处理。 然后进行用于沉积残余奥氏体的方法，然后进行最终的延伸过程，并且对接头部分进行成型，并且在不进行产品尺寸的完全退火的情况下执行弯曲加工。

公开(公告)号：US06213095B1

公开(公告)日：2001-04-10

申请号：US09033816

申请日：1998-03-03

Applicant: Kikuo Asada ,  Masayoshi Usui ,  Eiji Watanabe ,  Kazunori Takikawa

Inventor： Kikuo Asada ,  Masayoshi Usui ,  Eiji Watanabe ,  Kazunori Takikawa

IPC: F02M4100

CPC classification number: B21C37/29 ,  F02M55/025

Abstract: A common rail is provided for promoting inner pressure fatigue strength at location in proximity to a branch pipe. The common rail includes a main pipe rail with a main flow path. At least one boss in provided on the peripheral wall and includes a branch hole communicating the main flow path. The branch pipe is provided with a connecting head that has a pressing face at and end of the branch pipe. The pressing face of the branch pipe is urged into a pressure receiving seat of the boss. A compressive residual stress is provided at location in the peripheral wall where the main flow path of the main pipe rail communicates with the branch hole. The compressive residual stress increases the pressure fatigue strength by substantially canceling tensile stress.

Abstract translation: 提供了一种用于在分支管附近的位置处提高内部压力疲劳强度的共轨。 共轨包括具有主流路的主管道。 至少一个凸台设置在周壁上并且包括连通主流路的分支孔。 分支管设置有连接头，该连接头在分支管的端部和末端具有按压面。 分支管的按压面被推入凸台的受压座。 在主管道的主流路与分支孔连通的周壁的位置设有压缩残余应力。 通过基本上消除拉伸应力，压缩残余应力增加了压力疲劳强度。

公开(公告)号：US5957507A

公开(公告)日：1999-09-28

申请号：US972883

申请日：1997-11-18

Applicant: Kikuo Asada

Inventor： Kikuo Asada

IPC: F02M37/00 ,  F02M55/00 ,  F02M55/02 ,  F16L19/02 ,  F16L41/08 ,  F16L41/00

CPC classification number: F02M55/025 ,  F02M55/005 ,  F16L41/084 ,  F16L41/14 ,  Y10S285/906

Abstract: A joint structure for a branch connector in a common rail, comprising: a main pipe rail having a conduit therein on its axis and a plurality of through holes formed in its circumferential wall at an axial spacing, each of the through holes having a pressure receiving seat formed on the circumferential face thereof and opened to the outside; a branch connector having a conduit to communicate with the conduit of the main pipe rail and including a joint head formed at the end thereof and forming a pressure seat so that the branch connector is engaged with the main pipe rail by bringing the pressure seat thereof into abutment against the pressure receiving seat of the main pipe rail; a joint fitting mounted on the main pipe rail; and a nut assembled in advance in the branch connector and fastened into the joint fitting against the pressure of the joint head thereby to joint the branch connector to the main pipe. The joint fitting is made of a cylindrical sleeve nipple having a threaded face so that the branch connector is jointed to the main pipe rail by jointing the base end of the sleeve nipple to the outer circumference of the main pipe rail in the vicinity of the pressure receiving face.

Abstract translation: 一种用于共轨中的分支连接器的接头结构，包括：主管道，其主轴在其轴线上具有导管，多个通孔以轴向间隔形成在其周壁上，每个通孔具有压力接收 在其圆周面上形成并且向外部开口的座; 分支连接器，其具有与主管轨道的导管连通的导管，并且包括形成在其端部的接头，并形成压力座，使得分支连接器通过将其压力座进入主管轨道 抵靠主导轨的受压座; 安装在主管道上的接头配件; 以及螺母预先组装在分支连接器中并克服接头头部的压力紧固到接头配件中，从而将分支连接器接合到主管。 接头配件由具有螺纹面的圆柱形套筒接头制成，使得分支连接器通过将套筒接头的基端部接合到主管道的外周而在主管道上接合 接受面。

公开(公告)号：US20090078341A1

公开(公告)日：2009-03-26

申请号：US12244641

申请日：2008-10-02

Applicant: KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

Inventor： KIKUO ASADA ,  Osamu Endo ,  Katsunori Nagao ,  Keisuke Hitoshio

IPC: C22C38/00

CPC classification number: C22C38/02 ,  C21D8/10 ,  C21D9/08 ,  C21D9/14 ,  C21D2211/004 ,  C22C38/04 ,  F02M55/02 ,  F02M61/166 ,  F02M2200/03 ,  F02M2200/9053 ,  Y10S148/909

Abstract: To provide a steel pipe as a fuel injection pipe with high material strength, high internal pressure limit free from fatigue failure, prolonged fatigue life, and high reliability. A steel pipe as a fuel injection pipe of 500 N/mm2 or higher tensile strength comprising, by mass, C: 0.12 to 0.27%, Si: 0.05 to 0.40%, and Mn: 0.8 to 2.0%, and the balance being Fe and impurities, the contents of Ca, P, and S in the impurities being Ca: 0.001% or less, P: 0.02% or less, and S: 0.01% or less, respectively, characterized in that the maximum diameter of nonmetallic inclusions present in at least in a region extending from the inner surface of the steel pipe to a depth of 20 μm is 20 μm or less. Further, this steel pipe may contain, in place of a portion of Fe, at least one selected from among Cr: 1% or less, Mo: 1% or less, Ti: 0.04% or less, Nb: 0.04% or less, and V: 0.1% or less.

Abstract translation: 提供具有高材料强度的钢管作为燃料喷射管，没有疲劳破坏的高内压极限，延长的疲劳寿命和高可靠性。 作为500N / mm 2以上的拉伸强度的燃料喷射管的钢管，以质量计C：0.12〜0.27％，Si：0.05〜0.40％，Mn：0.8〜2.0％，余量为Fe， 杂质中Ca，P，S的含量分别为Ca：0.001％以下，P：0.02％以下，S：0.01％以下，其特征在于，非金属夹杂物的最大直径存在于 至少在从钢管的内表面延伸到20μm的深度的区域中，为20μm以下。 此外，该钢管可以含有选自Cr：1％以下，Mo：1％以下，Ti：0.04％以下，Nb：0.04％以下的至少一种，代替Fe的一部分， V：0.1％以下。

公开(公告)号：US07125051B2

公开(公告)日：2006-10-24

申请号：US10616571

申请日：2003-07-10

Applicant: Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

Inventor： Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

IPC: F16L5/00

CPC classification number: F02M55/025 ,  F02M55/004

Abstract: A common-rail injection system is provided for a diesel engine and has excellent internal pressure fatigue resisting characteristics, vibrational fatigue resisting characteristics and cavitation resisting property and sheet face flawing resisting property, and can be made thin and light in weight. A main pipe rail is manufactured by transformation induced plastic type strength steel. After the main pipe rail is processed, residual austenite is generated by heat treatment, and the reduction processing of stress concentration of a branch hole and a main pipe rail side flow passage crossing portion is performed. Further, it is preferable that an induced plastic transformation is generated on the inner surface of the main pipe rail by autofrettage processing, and compression residual stress is left.

Abstract translation: 本发明提供一种用于柴油发动机的共轨喷射系统，具有优异的内压疲劳抗力特性，抗振性，耐气孔性，耐断层性等优点，能够轻量化。 主导轨由转变诱导塑料型强度钢制成。 在处理主管轨之后，通过热处理产生残余奥氏体，并且执行分支孔和主管轨侧流动通道交叉部分的应力集中的还原处理。 此外，优选通过自动补焊处理在主管轨的内表面上产生诱导塑性变形，并且留下压缩残余应力。

公开(公告)号：US20050127665A1

公开(公告)日：2005-06-16

申请号：US11012713

申请日：2004-12-15

Applicant: Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

Inventor： Masayoshi Usui ,  Kikuo Asada ,  Teruhisa Takahashi

IPC: F02M55/02 ,  F02M61/16 ,  F16L9/02 ,  F16L45/00

CPC classification number: F02M55/025

Abstract: There is provided a high-pressure fuel pipe for diesel engines, which is excellent in inner-pressure fatigue resistant property, vibrational fatigue resistant property, cavitation-resistant property, seat surface crack resistant property, and bending shape stability, and capable of thinning and lightening. A high-pressure fuel pipe for diesel engines, composed of a low alloy transformation inducing plastic type strength steel containing residual austenite of 5 to 40 wt %, and wherein an inner surface of a flow passage has a crack depth of 20 μm or less, and plastic working is applied to an inner surface of a flow passage.

Abstract translation: 本发明提供一种耐压耐疲劳性，抗振性，耐气孔性，座面抗裂性，弯曲形状稳定性优异的柴油发动机用高压燃料管，能够减薄， 减轻 一种用于柴油发动机的高压燃料管，由含有5〜40重量％的残余奥氏体的低合金变形诱导塑料型强度钢组成，其中，流路的内表面的裂纹深度为20μm以下， 并且将塑性加工施加到流路的内表面。

公开(公告)号：US06397881B1

公开(公告)日：2002-06-04

申请号：US09033681

申请日：1998-03-03

Applicant: Kikuo Asada ,  Masayoshi Usui ,  Eiji Watanabe ,  Kazunori Takikawa ,  Ryuichi Kusanagi

Inventor： Kikuo Asada ,  Masayoshi Usui ,  Eiji Watanabe ,  Kazunori Takikawa ,  Ryuichi Kusanagi

IPC: F16K4300

CPC classification number: B21C37/29 ,  F02M55/005 ,  F02M55/025 ,  Y10T137/6123

Abstract: A member for a high pressure fluid or a member for a high pressure fluid with a built-in slider having higher quality which can be provided at a low price, and by which the generation of tensile stress in the lower end inner peripheral edge part of a branch hole can be canceled by compressive residual stress to be effectively restrained, the internal pressure fatigue strength in the branch hole part can be improved to be excellent in durability, prevent a fluid leakage due to the occurrence of cracks and then exhibit a sure and stable function, further only the addition of the pressing force applying process to the ordinary manufacturing process will be sufficient, and complicated equipment is not required to hardly cause the problems of an increase in the equipment cost due to an increase in the number of processes and lowering of productivity. The method of forming a branch hole communicating with a hollow part in a member for a high pressure fluid having the hollow part, which is characterized in that before or after, or simultaneously with a process of pressing inward the member for a high pressure fluid from the outside to form a part where compressive stress remains on the hollow part side inner peripheral surface, a process of boring a branch hole opened to the hollow part is executed to make the compressive residual stress exist in the peripheral edge of the branch hole, and a branch hole part of a member for a high pressure fluid formed by the described method.

Abstract translation: 用于高压流体的构件或具有可以以低价格提供的具有较高质量的内置滑块的高压流体的构件，并且通过该构件在下端内周边缘部分中产生拉伸应力 可以通过压缩残余应力来消除分支孔，以有效地抑制，能够提高分支孔部的内部压力疲劳强度，从而具有优异的耐久性，防止由于裂纹的发生而导致的流体泄漏， 稳定的功能，只要在普通制造工序中增加按压力就足够了，而且复杂的设备不需要几乎不会由于加工次数的增加而造成设备成本上升的问题， 降低生产率。在具有中空部分的高压流体的构件中形成与中空部分连通的分支孔的方法，其是cha 其特征在于，在其前后，或者同时具有从外部向内压入高压流体的构件的过程，以形成在中空部件侧内周面上残留有压应力的部分，打开分支孔的工序 执行到中空部分以使分支孔的周边边缘存在压缩残余应力，以及通过所述方法形成的用于高压流体的部件的分支孔部分。

公开(公告)号：US20050284447A1

公开(公告)日：2005-12-29

申请号：US11153166

申请日：2005-06-15

Applicant: Masayoshi Usui ,  Kikuo Asada ,  Yasuaki Hashimoto ,  Hiroyuki Nishizawa ,  Iichiro Seino

Inventor： Masayoshi Usui ,  Kikuo Asada ,  Yasuaki Hashimoto ,  Hiroyuki Nishizawa ,  Iichiro Seino

IPC: B21D39/00 ,  B21D41/02 ,  B21D53/84 ,  F02M55/00 ,  F02M55/02 ,  F02M63/02

CPC classification number: F02M55/005 ,  F02M55/02 ,  F02M55/025 ,  F16L41/14

Abstract: A joint structure connects a diverging branch pipe to a fuel rail for an internal combustion engine. The fuel rail is stainless steel or steel with rust prevention processing on at least the inner face. The diverging branch pipe is a double pipe with inner and outer pipes. The inner pipe has excellent rust preventing ability with respect to fuel on its inner face in comparison with the outer face of the outer pipe. The inner and outer pipes are connected by a nut for fastening through a joint fitting. A connecting seal portion of the diverging branch pipe and the joint fitting has rust preventing ability equal to that of the inner circumferential face of the diverging branch pipe. An entire liquid contact portion, including a seal face of the diverging branch pipe with respect to the fuel is covered with the inner pipe.

Abstract translation: 连接结构将发散支管连接到用于内燃机的燃料轨。 燃油轨至少在内表面上是不锈钢或防锈处理的钢。 分支管是具有内管和外管的双管。 内管与外管的外表面相比，内管上的燃料具有优异的防锈能力。 内管和外管通过螺母连接，用于通过接头配件紧固。 发散支管和接头配件的连接密封部分具有与发散分支管的内周面相同的防锈能力。 包括发散支管相对于燃料的密封面的整个液体接触部分被内管覆盖。

公开(公告)号：US20050275218A1

公开(公告)日：2005-12-15

申请号：US11127896

申请日：2005-05-12

Applicant: Kikuo Asada

Inventor： Kikuo Asada

IPC: F02M55/02 ,  F02M55/00 ,  F16L41/00 ,  F16L41/02 ,  F16L41/08 ,  F16L41/14

CPC classification number: F02M55/005 ,  F02M55/025 ,  F16L41/08 ,  F16L41/14

Abstract: A joint structure of a branch connector for a common rail capable of securing axial force applied to a seal surface and a branch connector and increasing bending fatigue strength of the branch connector is provided. In the joint structure of the branch connector for the common rail which includes a screw sleeve concentric with a bearing surface of a main pipe rail and connects a branch connector to the main pipe rail via a sleeve washer which has been externally fixed to the branch connector in advance to be combined therewith as one piece, a clearance is provided between an inner surface of the sleeve washer at an external opening thereof and an outer surface of the branch connector.

Abstract translation: 提供了一种用于共轨的分支连接器的连接结构，其能够确保施加到密封表面的轴向力和分支连接器，并且提高了分支连接器的弯曲疲劳强度。 在用于共轨的分支连接器的接头结构中，其包括与主管轨的轴承表面同心的螺旋套筒，并且通过套筒垫圈将分支连接器连接到主管轨道，套筒垫圈已经被外部固定到分支连接器 预先将其组合为一体，在套筒垫圈的外部开口的内表面和分支连接器的外表面之间设置间隙。