公开(公告)号：US06494183B2

公开(公告)日：2002-12-17

申请号：US09767466

申请日：2001-01-23

Applicant: Masayoshi Usui ,  Kikuo Asada

Inventor： Masayoshi Usui ,  Kikuo Asada

IPC: F02M4100

CPC classification number: F02M55/005 ,  F02M55/025

Abstract: A common rail includes a main pipe rail having a circulating passage extending in its inside in the axial direction thereof, branch holes formed in an axial peripheral wall portion of the main pipe rail, and branch connectors connected to the respective branch holes integrally or via separate connecting members. A Ni-diffused fatigue strength reinforcing layer is formed by heating a Ni layer plated in advance on at least a portion of an inner circumferential surface of the common rail. The increased strength and the action of the fatigue strength reinforcing layer lowers the degree of fatigue concentration to increase fatigue strength against inner pressure.

Abstract translation: 共轨包括：主管道，其具有沿其轴向在其内部延伸的循环通道，形成在主管轨的轴向周壁部分中的分支孔和分支连接器，其一体地或经由分离器连接到各个分支孔 连接成员。 通过预先在共轨的内周面的至少一部分上加热镀Ni层来形成Ni扩散疲劳强度增强层。 疲劳强度增强层的强度提高和作用降低了疲劳强度，提高了内压的疲劳强度。

公开(公告)号：US06463909B2

公开(公告)日：2002-10-15

申请号：US09747084

申请日：2000-12-21

Applicant: Kikuo Asada ,  Shoichiro Usui

Inventor： Kikuo Asada ,  Shoichiro Usui

IPC: F02M4100

CPC classification number: F02M55/025 ,  F02M55/005 ,  F02M2200/28 ,  F02M2200/315

Abstract: A common rail has a main pipe rail with a peripheral wall. A boss is provided on the peripheral wall, and a branch hole extends through the boss and into the main pipe rail. The branch hole has a pressure receiving seat face. A branch pipe has a pressing seat face that is urged into the pressure receiving seat face by a fastening nut. An orifice pipe is mounted in the branch hole and abuts against an end of the branch pipe without effecting sealing performance between the pressing seat face and the pressure receiving seat face.

Abstract translation: 共轨具有带有周壁的主管轨。 在周壁上设置有凸台，并且分支孔延伸穿过凸台并进入主管轨。 分支孔具有受压座面。 分支管具有按压座面，其被紧固螺母推入压力座表面。 孔口管安装在分支孔中，并且抵靠支管的一端而不影响按压座面与受压座面之间的密封性能。

公开(公告)号：US06408826B1

公开(公告)日：2002-06-25

申请号：US09033541

申请日：1998-03-20

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

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

IPC: F02M5502

Abstract: There is provided a common rail which can effectively restrict a generation of a stress in a lower end inner peripheral edge portion of a branch hole and can improve an internal pressure fatigue strength in a branch pipe connecting portion, so that a secure and stable function can be obtained by having an excellent durability and preventing a fluid leakage due to a generation of the crack generation and a method of manufacturing a common rail in which a pressure application process by the press is only added to a normal manufacturing process, no complex equipment is required, a common rail having a high quality can be manufactured by a low cost without generating problems that an equipment cost is increased by an increase of the process and a productivity is reduced. In the method of the invention, there is provided a method of manufacturing a common rail comprising at least one branch hole provided in an axial peripheral wall portion of a main pipe rail having a communication passage inside an axial core, a pressure receiving seat surface communicating with a branch pipe having a communication passage communicating with the communication passage in a peripheral surface portion of the branch hole and open to an outer portion, thereby bringing a pressing seat surface portion constituted by a connection head portion disposed in an end portion of the branch pipe into contact and engaging therewith, and a joint metal fitting surrounding an outer peripheral portion of the main pipe rail and a nut previously assembled in the branch pipe end which are meshed with each other so as to be pressed under a neck portion of the connection head portion, thereby being fastened and connected, wherein a pressing force is applied to the main pipe rail near the branch hole from an outer portion to a diametrical direction by a press method, thereby generating a compression residual stress at a portion near the open end portion of the communication passage of the main pipe rail in the branch hole.

公开(公告)号：US06317975B1

公开(公告)日：2001-11-20

申请号：US09499838

申请日：2000-02-07

Applicant: Kikuo Asada ,  Ryuichi Kusanagi

Inventor： Kikuo Asada ,  Ryuichi Kusanagi

IPC: B23P1500

CPC classification number: F02M55/025 ,  B21C37/29 ,  B21K3/00 ,  Y10T29/49231 ,  Y10T29/49412 ,  Y10T29/49416

Abstract: A method is provided for manufacturing common rails, such as a high-pressure fluid manifold or a block rail that may be use in an accumulator fluid injection system. The method includes providing a main tubular rail with a flow passage extending in an axial direction. A bottomed lower hole is formed generally transverse to the axial flow passage. A pressing force is applied to the bottomed lower hole to generate a residual compressive stress in a circumferential part of the end portion of the bottom hole. The bottom lower hole then is made to communicate with the flow passage in the main rail. Defects that may have been caused by the application of the pressing force then are cut off. The removal of the defects improves an internal pressure fatigue strength, achieves high durability and ensures freedom from leakage.

Abstract translation: 提供了一种用于制造公共轨道的方法，例如可用于蓄液器喷射系统中的高压流体歧管或块轨道。 该方法包括提供主管状轨道，其具有在轴向方向上延伸的流动通道。 大致横向于轴向流动通道形成有底的下孔。 向底部的下孔施加按压力，在底孔的端部的周向部分产生残留的压缩应力。 然后使底部下孔与主轨道中的流动通道连通。 可能由施加按压力引起的缺陷被切断。 去除缺陷会提高内部压力疲劳强度，实现高耐久性，并确保无泄漏。

公开(公告)号：US6126208A

公开(公告)日：2000-10-03

申请号：US33344

申请日：1998-03-02

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

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

IPC: B21C37/29 ,  F02M55/00 ,  F02M55/02 ,  A16L41/08

CPC classification number: F02M55/025 ,  B21C37/29 ,  F02M55/005 ,  Y10T29/49442

Abstract: A common rail includes a generally cylindrical peripheral wall having a communication passage extending axially therethrough. At least one branch hole extends through the peripheral wall and is aligned perpendicular to the axis of the common rail. The intersection of the branch hole with the outer surface of the main pipe rail defines an outwardly flared pressure receiving seat for receiving the connection head portion of a branch pipe. A sleeve nipple is welded or brazed to the outer surface of the main pipe rail and surrounds the branch hole. Inner surface regions of the peripheral wall surrounding the branch hole have a compression residual stress imparted thereto. The creation of the compression residual stress may cause a portion of the inner surface of the main pipe rail surrounding the branch hole to assume a non-cylindrical configuration.

Abstract translation: 共轨包括具有沿轴向延伸穿过的连通通道的大致圆柱形周壁。 至少一个分支孔延伸穿过周壁并且垂直于共轨的轴线对齐。 分支孔与主管道的外表面的交叉部分形成一个向外扩张的压力接收座，用于接收支管的连接头部。 套管接头焊接或钎焊到主管轨的外表面并围绕分支孔。 围绕分支孔的周壁的内表面区域具有赋予的压缩残余应力。 压缩残余应力的产生可能导致围绕分支孔的主管轨道的内表面的一部分呈现非圆柱形构型。