公开(公告)号：US20200224608A1

公开(公告)日：2020-07-16

申请号：US16828051

申请日：2020-03-24

Applicant: DENSO CORPORATION

Inventor： Keita KURIGAMI ,  Shinichiro KOSHIMOTO ,  Yoshihito SUZUKI ,  Hiroshi INOUE ,  Tatsumi OGURI ,  Keigo OHATA ,  Takayuki MAKIHARA ,  Taiki KUKITA

IPC: F02M21/02 ,  F02M37/00

Abstract: A high-pressure pump includes a pressurizing chamber forming portion, a suction passage forming portion, a seat member, a valve member, a cylindrical member, a needle, a movable core, a biasing member, a fixed core, and a coil including a winding portion. The coil generates an attractive force between the fixed core and the movable core when the winding portion is energized. The coil includes an outer cylindrical surface and multiple inner cylindrical surfaces that have different diameters. The multiple inner cylindrical surfaces are arranged in order of increasing diameter in a direction toward a pressurizing chamber. The movable core has an end surface that faces the fixed core, and the end surface of the movable core is located between a center, in an axial direction, of a smallest diameter one of the plurality of inner cylindrical surfaces and a center, in an axial direction, of the outer cylindrical surface.

公开(公告)号：US20200224625A1

公开(公告)日：2020-07-16

申请号：US16828122

申请日：2020-03-24

Applicant: DENSO CORPORATION

Inventor： Keigo OHATA ,  Shinichiro KOSHIMOTO ,  Yoshihito SUZUKI

IPC: F02M63/00 ,  F04B53/10

Abstract: A high-pressure pump includes a pressurizing chamber forming portion including a cylindrical inner peripheral wall that defines a pressurizing chamber, a plunger, a housing including a housing outer peripheral wall, a valve member, an electromagnetic driving unit, a discharge passage portion, and a fixed portion that is connected to the housing. The fixed portion has multiple bolt holes. The multiple bolt holes are arranged radially outward of the housing outer peripheral wall in a circumferential direction when viewed along a direction of an axis of the cylindrical inner peripheral wall. The high-pressure pump is virtually divided into a first region and a second region by a virtual surface on which axes of adjacent ones of the multiple bolt holes and an axis of the cylindrical inner peripheral wall extend. Both the electromagnetic driving unit and the discharge passage portion are located in the first region or the second region.

公开(公告)号：US20190170100A1

公开(公告)日：2019-06-06

申请号：US16269590

申请日：2019-02-07

Applicant: DENSO CORPORATION

Inventor： Shinichiro KOSHIMOTO ,  Yoshihito SUZUKI

IPC: F02M59/46 ,  F16K17/04 ,  F16K24/02 ,  F16K17/22

Abstract: A relief valve device includes: a valve housing that includes a communication passage, which communicates between a first pressure chamber and a second pressure chamber, and a relief chamber, which is configured to communicate with the second pressure chamber; a partition wall that is formed in an inside of the valve housing and partitions between the communication passage and the relief chamber; a first valve member that is configured to block and enable flow of fluid between the first pressure chamber and the communication passage; a first urging member that urges the first valve member; a second valve member that is configured to block and enable flow of the fluid between the second pressure chamber and the relief chamber; and a second urging member that urges the second valve member.

公开(公告)号：US20200224653A1

公开(公告)日：2020-07-16

申请号：US16828081

申请日：2020-03-24

Applicant: DENSO CORPORATION

Inventor： Shinichiro KOSHIMOTO ,  Yoshihito SUZUKI ,  Takayuki MAKIHARA

IPC: F04B53/10 ,  F04B49/24 ,  F02M63/00

Abstract: A high-pressure pump includes a pressurizing chamber forming portion, a discharge passage forming portion, a discharge seat member, an intermediate member, a relief seat member, a discharge valve, and a relief valve. The intermediate member includes a first passage that passes through the intermediate member between one surface facing a pressurizing chamber and the other surface facing away from the pressurizing chamber. The relief valve seat includes a second passage that passes through the relief seat member between the one surface facing the pressurizing chamber and the other surface facing away from the pressurizing chamber. At least one of the intermediate member and the relief seat member includes an annular recess that fluidly connects the first passage and the second passage. The annular recess is recessed from a surface of the at least one of the intermediate member and the relief seat member facing the other.