公开(公告)号：US20220275765A1

公开(公告)日：2022-09-01

申请号：US17676938

申请日：2022-02-22

Applicant: DENSO CORPORATION

Inventor： Masashi INABA ,  Tomoki FUJINO

IPC: F02D41/20 ,  F02D41/28 ,  F02D41/40 ,  F02D41/22

Abstract: An energization control unit is configured to perform a constant current control by repeatedly switching between an on-state and an off-state of at least one upstream switch provided in an energization path of a coil of a fuel injection valve to control opening of the fuel injection valve in a drive period in which the coil is energized to drive the fuel injection valve. A current detection unit is configured to detect a coil current flowing through the coil. A valve-opening detection unit is configured to detect valve-opening timing of the fuel injection valve based on a change in at least one frequency spectrum of the coil current in a constant current control period in which the constant current control is performed. A valve-opening correction unit is configured to correct valve opening of the fuel injection valve based on a detection result of the valve-opening detection unit.

公开(公告)号：US20160010610A1

公开(公告)日：2016-01-14

申请号：US14792971

申请日：2015-07-07

Applicant: DENSO CORPORATION ,  KYUSHU UNIVERSITY, NATIONAL UNIVERSITY CORPORATION

Inventor： Tomoki FUJINO ,  Shinichiro KAWAKITA ,  Wakichi KONDOH ,  Yoshiaki NISHIJIMA ,  Hiroshi TAJIMA

IPC: F02M61/10 ,  F02M61/16 ,  F02B9/02 ,  F02M63/00

CPC classification number: F02M61/168 ,  F02D19/0694 ,  F02D19/10 ,  F02M43/04 ,  F02M51/0653 ,  F02M61/182 ,  F02M2200/46 ,  Y02T10/36

Abstract: A fuel injection device injects natural gas from a first injection hole of a first housing and injects light oil form a second injection hole of a second housing. A weld part as a fixation part fixes positions of the first injection hole and the second injection hole such that a spray of natural gas injected from the first injection hole and a spray of light oil injected from the second injection hole contact each other. Thus the spray of light oil self-ignites by compression of air in a cylinder of an internal combustion engine and the spray of natural gas burns by ignition from a flame of the self-ignited light oil.

Abstract translation: 燃料喷射装置从第一壳体的第一喷射孔注入天然气，并从第二壳体的第二喷射孔喷射轻质油。 作为固定部的焊接部固定第一喷射孔和第二喷射孔的位置，使得从第一喷射孔喷射的天然气喷雾和从第二喷射孔喷射的轻油喷射彼此接触。 因此，轻油喷雾通过内燃机的气缸中的空气的压缩而自燃，并且天然气的喷雾通过点燃从自燃轻油的火焰燃烧。

公开(公告)号：US20210108603A1

公开(公告)日：2021-04-15

申请号：US16665579

申请日：2019-10-28

Applicant: DENSO CORPORATION

Inventor： Niro TAKAKI ,  Fumiaki ARIKAWA ,  Tomoki FUJINO

IPC: F02M61/10 ,  F02M51/06

Abstract: A fuel injection valve includes a fixed core and a movable core. The fixed core includes a fixed-side high rigidity portion having high rigidity and a fixed-side low rigidity portion having rigidity lower than that of the fixed-side high rigidity portion. The movable core includes a movable-side high rigidity portion having high rigidity and a movable-side low rigidity portion having rigidity lower than that of the movable-side high rigidity portion. Current fed to a coil generates a magnetic attractive force to cause the movable core to move toward the fixed core together with a needle and to cause the movable-side high rigidity portion to abut on the fixed-side high rigidity portion.

公开(公告)号：US20180038330A1

公开(公告)日：2018-02-08

申请号：US15709046

申请日：2017-09-19

Applicant: DENSO CORPORATION

Inventor： Tomoki FUJINO ,  Takashi FURUKAWA ,  Yusuke HONGO

IPC: F02M51/06 ,  F02M61/08 ,  F02M61/16 ,  F02M21/02 ,  F02M61/18

CPC classification number: F02M51/0625 ,  F02M21/0212 ,  F02M21/0254 ,  F02M21/0266 ,  F02M21/0269 ,  F02M51/0664 ,  F02M51/0682 ,  F02M51/0685 ,  F02M61/08 ,  F02M61/166 ,  F02M61/1893 ,  F02M2200/9015 ,  Y02T10/32 ,  Y10T29/49002

Abstract: A fuel injector 100 includes a nozzle member 60 having a fuel passage 60a leading to an injection port 60b; a valve main body 51 adapted to reciprocate for opening and closing the fuel passage 60a; an elastic portion 56 elastically deformable in closing the fuel passage 60a by movement of the valve main body 51 in a closing direction, the elastic member being attached to one of the nozzle member 60 and the valve main body 51 and adapted to be abutted against the other of the nozzle member 60 and the valve main body 51 to close the fuel passage 60a by moving the valve main body 51 in the closing direction; and a stopper 70 adapted to restrict movement of the valve main body 51 in the closing direction by being abutted against the valve main body 51, the stopper 70 being formed of material different from the nozzle member 60.

公开(公告)号：US20170016417A1

公开(公告)日：2017-01-19

申请号：US15119455

申请日：2015-02-24

Applicant: DENSO CORPORATION

Inventor： Tomoki FUJINO

IPC: F02M51/06 ,  F16K31/06

CPC classification number: F02M51/0685 ,  F02M21/026 ,  F02M61/184 ,  F02M61/20 ,  F16K31/0655 ,  Y02T10/32

Abstract: A fuel injection device includes a coil, a stator provided on an inner side of the coil, a housing including an injection hole at an end opposite to a stator side in an axial direction, a movable element including a movable element main body that generates a first gap with the stator and a stopper portion provided to an injection hole side of the movable element main body, and provided inside the housing in a reciprocable manner, a main valve including a lock portion that generates a second gap smaller than the first gap together with an end face of the stopper portion on the stator side, and provided to open and close the injection hole, a first pushing portion constantly pushing the movable element to the injection hole side, and a second pushing portion constantly pushing the main valve to the stator side.

Abstract translation: 一种燃料喷射装置，包括线圈，设置在线圈内侧的定子，在轴向与定子侧相对的端部具有喷射孔的壳体，包括可动元件主体的可动元件， 与定子的第一间隙和设置在可移动元件主体的喷射孔侧的止动部分，并且以可往复的方式设置在壳体内部;主阀，包括锁定部分，该锁定部分产生小于第一间隙的第二间隙 定子侧的止动部的端面设置成打开和关闭喷射孔，第一推动部分将可动元件恒定地推向喷射孔侧，第二推动部分将主阀持续推向 定子侧。