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.

公开(公告)号：US20220403795A1

公开(公告)日：2022-12-22

申请号：US17893603

申请日：2022-08-23

Applicant: DENSO CORPORATION

Inventor： Keisuke YANOTO ,  Takayuki MAKIHARA ,  Hatsumi TAKEUCHI ,  Tomoya TAKEUCHI ,  Haruki SUZUKI

IPC: F02D41/24 ,  F02D41/20

Abstract: A fuel injection control device is applied to an internal combustion engine including a fuel injection valve and causes a valve body to be in a valve open state accompanying an energization of the fuel injection valve to inject fuel. The fuel injection control device acquires a dynamic parameter. The fuel injection control device acquires an injection amount parameter. The fuel injection control device calculates, based on the dynamic parameter, a dynamic correction value. The fuel injection control device calculates, based on the injection amount parameter, an injection amount correction value. The fuel injection control device corrects a fuel injection using the dynamic correction value and the injection amount correction value.

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.