公开(公告)号：US20220106935A1

公开(公告)日：2022-04-07

申请号：US17554622

申请日：2021-12-17

Applicant: DENSO CORPORATION

Inventor： Hiroki KANETA ,  Hajime KATAOKA ,  Masayuki NIWA ,  Noritsugu KATOU ,  Yousuke NAKAGAWA ,  Masahiro OOKUMA ,  Sao YOSHIDOME ,  Gen TAKAI

IPC: F02M61/18

Abstract: At least one of nozzle holes is provided as a non-circular nozzle hole where the ratio of the longest diameter to the shortest diameter of an outlet opening portion is greater than 1. A virtual non-circular cone and a virtual circular cone are defined for each of the non-circular nozzle hole and a circular nozzle hole where the ratio of the longest diameter to the shortest diameter of the outlet opening portion is 1. At least two adjacent nozzle holes are formed such that the virtual non-circular cone does not interfere with the virtual circular cone or the virtual non-circular cone.

公开(公告)号：US20210123403A1

公开(公告)日：2021-04-29

申请号：US17142631

申请日：2021-01-06

Applicant: DENSO CORPORATION

Inventor： Masayuki NIWA ,  Yosuke NAKAGAWA ,  Masahiro OKUMA ,  Noritsugu KATO ,  Hiroki KANETA

IPC: F02M61/10

Abstract: A nozzle body has an injection hole configured to inject fuel and a fuel passage connecting to the injection hole. A needle is configured to open and close the fuel passage to switch between fuel injection from the injection hole and stop of the fuel injection. An injection hole axis is an imaginary line extending along a center of the injection hole. An injection hole perpendicular cross section is a cross section of the injection hole perpendicular to the injection hole axis. The injection hole perpendicular cross section has a flat shape. The injection hole perpendicular cross section has an area that gradually expands from an inlet of the injection hole to an outlet of the injection hole while maintaining a similar shape.

公开(公告)号：US20200157980A1

公开(公告)日：2020-05-21

申请号：US16751870

申请日：2020-01-24

Applicant: DENSO CORPORATION

Inventor： Masayuki NIWA ,  Makoto SAIZEN ,  Makoto TANAKA

IPC: F01L9/04 ,  F02P5/145 ,  F16K31/06

Abstract: A fuel injection control device includes an additional energization unit. Concerning an undershoot state caused by a first energization for fuel injection, a return period is an estimated period required for a movable core to return to an initial position from a first energization. An injection interval ranges from the first energization to a second energization that is for a next fuel injection. An allowable period is obtained by subtracting a rise period estimated for the second energization from the return period. The additional energization unit adds an additional energization between the first energization and the second energization when the injection interval is longer than or equal to the allowable period and is shorter than or equal to the return period.

公开(公告)号：US20190093617A1

公开(公告)日：2019-03-28

申请号：US16071181

申请日：2017-01-13

Applicant: DENSO CORPORATION

Inventor： Masayuki NIWA ,  Noritsugu KATO

IPC: F02M61/18 ,  F02M51/06 ,  F02M61/10

Abstract: An injection hole has an injection hole passage communicating an inner opening with an outer opening. The inner opening is smaller than the outer opening in cross-sectional area. The needle moves in a valve closing direction to abut against a valve seat to restrict a flow of fuel through the injection hole. A first inner wall of the injection hole is located on a valve closing direction side relative to an injection hole axis. A second inner wall of the injection hole is located on an opposite side of the injection hole axis from the valve closing direction side. The injection hole passage is defined by the first inner wall and the second inner wall.

公开(公告)号：US20180010546A1

公开(公告)日：2018-01-11

申请号：US15543741

申请日：2015-12-22

Applicant: DENSO CORPORATION

Inventor： Masayuki NIWA ,  Noritsugu KATO ,  Makoto TANAKA

IPC: F02D41/40 ,  F02M51/06

CPC classification number: F02D41/40 ,  F02D41/20 ,  F02D2041/2003 ,  F02D2041/2034 ,  F02M45/00 ,  F02M51/00 ,  F02M51/06 ,  F02M51/061 ,  Y02T10/44

Abstract: A fuel injection valve control device controlling a fuel injection valve that injects a fuel into a combustion chamber includes an operation-condition calculation portion that calculates a fuel injection condition of the fuel injection valve based on a crank angle detected by a crank angle sensor that detects the crank angle of an engine, a current-waveform setting portion that sets a current waveform of a current supplied to the fuel injection valve on the basis of the fuel injection condition calculated by the operation-condition calculation portion, and so on. The current-waveform setting portion sets the current waveform so as to set a temporal change of a pickup current of a needle provided in the fuel injection valve to be equal to or less than a predetermined reference value when a fuel injection start timing is equal to or more than 180 degrees BTDC. The current-waveform setting portion sets the current waveform so as to set a temporal change of the pickup current of the needle to be more than the predetermined reference value when the fuel injection start timing is smaller than 180 degrees BTDC.