公开(公告)号：US11835020B2

公开(公告)日：2023-12-05

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

CPC classification number: 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：US12055119B2

公开(公告)日：2024-08-06

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

CPC classification number: 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：US10302054B2

公开(公告)日：2019-05-28

申请号：US15504842

申请日：2015-10-13

Applicant: DENSO CORPORATION

Inventor： Hiroki Kaneta

IPC: F02M51/06 ,  F16K31/06 ,  F02M61/18

Abstract: A needle includes a first seal portion, which is formed at an end portion of the needle located on a side where an injection hole is placed, and a second seal portion, which is formed on a side of the first seal portion where a stationary core is placed. When a boundary between a first outer wall of the first seal portion and a second outer wall of the second seal portion is lifted away from or is seated against an inner wall, the injection hole is opened or closed. Thereby, a seat diameter of the boundary and the inner wall is stabilized, and a change in a fuel injection quantity caused by aging can be reduced. Furthermore, the first outer wall of the first seal portion is shaped into a form of a spherical surface.

公开(公告)号：US09828961B2

公开(公告)日：2017-11-28

申请号：US14909265

申请日：2014-07-29

Applicant: DENSO CORPORATION

Inventor： Hiroki Kaneta

IPC: F02M61/18

CPC classification number: F02M61/1846 ,  F02M61/1826 ,  F02M61/1833

Abstract: In a fuel injection valve, a first injection hole and a second injection hole having reference inside diameters Dn1, Dn2 different from each other are formed as a plurality of injection holes. In such a configuration, an L/D value obtained by dividing the flow channel length Ln1 of the first injection hole by the reference inside diameter Dn1 of the first injection hole agrees to an L/D value obtained by dividing the flow channel length Ln2 of the second injection hole by the reference inside diameter Dn2 of the second injection hole.

公开(公告)号：US10260470B2

公开(公告)日：2019-04-16

申请号：US15792788

申请日：2017-10-25

Applicant: DENSO CORPORATION

Inventor： Hiroki Kaneta

IPC: F02M61/18

Abstract: In a fuel injector 10, a first injection hole 155a and a second injection hole 155b having reference inside diameters Dn1, Dn2 different from each other are formed as a plurality of injection holes 155. In such a configuration, an L/D value obtained by dividing the flow channel length Ln1 of the first injection hole 155a by the reference inside diameter Dn1 of the first injection hole 155a agrees to an L/D value obtained by dividing the flow channel length Ln2 of the second injection hole 155b by the reference inside diameter Dn2 of the second injection hole 155b.

公开(公告)号：US09303608B2

公开(公告)日：2016-04-05

申请号：US14534829

申请日：2014-11-06

Applicant: DENSO CORPORATION

Inventor： Hiroki Kaneta

IPC: F02M61/18

CPC classification number: F02M61/1833 ,  F02M61/1806

Abstract: A fuel injector has a valve nozzle defining a fuel-injection port downstream of a fuel passage. The fuel-injection port is inclined toward a nozzle periphery from a fuel-inlet to a fuel-outlet. A valve needle is capable of moving in a valve-opening direction to open the fuel-injection port so that a fuel flowing into the fuel-inlet from the nozzle periphery is injected into an internal combustion engine. The fuel-injection port has an upstream-portion defining the fuel-inlet, and a downstream-portion defining the fuel-outlet. The downstream-portion is smoothly connected to the upstream-portion at a position most close to a center of the valve nozzle, and the downstream-portion is offset toward the nozzle periphery relative to the upstream-portion, so that the upstream-portion and the downstream-portion forms a step surface therebetween. The step surface is eccentric to a center line of the upstream-portion.

Abstract translation: 燃料喷射器具有在燃料通道下游限定燃料喷射口的阀喷嘴。 燃料喷射口从燃料入口向燃料出口朝向喷嘴周边倾斜。 阀针能够沿阀打开方向移动以打开燃料喷射口，使得从喷嘴周边流入燃料入口的燃料被喷射到内燃机中。 燃料喷射口具有限定燃料入口的上游部分和限定燃料出口的下游部分。 下游部在最靠近阀喷嘴的中心的位置处平滑地连接到上游部分，并且下游部分相对于上游部分朝向喷嘴周边偏移，使得上游部分和 下游部分之间形成台阶表面。 台阶表面偏心于上游部分的中心线。