公开(公告)号：US20230216279A1

公开(公告)日：2023-07-06

申请号：US18175172

申请日：2023-02-27

Applicant: DENSO CORPORATION

Inventor： Akimitsu SUGIURA

IPC: H01T13/54

CPC classification number: H01T13/54

Abstract: In a spark plug, at least one injection hole serves as a ground-directed injection hole arranged to face a facing side of a ground electrode. An extension line of the center axis of the at least one ground-directed injection hole intersects with the facing side of the ground electrode at an intersection point. The facing side of the ground electrode has a closer region closer to the projection-end edge of the ground electrode than the intersection point is. The closer region of the facing side intersects with the extension line of the center axis of the ground-directed injection hole at a predetermined angle as viewed in the axial direction of the spark plug. The predetermined angle being an obtuse angle.

公开(公告)号：US20230193870A1

公开(公告)日：2023-06-22

申请号：US18110539

申请日：2023-02-16

Applicant: DENSO CORPORATION

Inventor： Akimitsu SUGIURA

IPC: F02P13/00 ,  F02B19/12 ,  F02P15/10

CPC classification number: F02P13/00 ,  F02B19/12 ,  F02P15/10

Abstract: Disclosed is an ignition apparatus for an internal combustion engine. The ignition apparatus includes a spark plug, an ignition coil and a controller. The spark plug has an auxiliary combustion chamber in which a discharge gap is arranged. The ignition coil is configured to apply a voltage to the spark plug. The controller is configured to perform a multiple-discharge mode in which discharge is generated at least twice, with a discharge pause period intervening therebetween, across the discharge gap within a period from a compression stroke to an expansion stroke of the internal combustion engine.

公开(公告)号：US20200112144A1

公开(公告)日：2020-04-09

申请号：US16590653

申请日：2019-10-02

Applicant: DENSO CORPORATION

Inventor： Yuuki KAWATA ,  Fumiaki AOKI ,  Daisuke TANAKA ,  Ryota WAKASUGI ,  Akimitsu SUGIURA ,  Kanechiyo TERADA ,  Tetsuya MIWA

IPC: H01T13/32 ,  H01T13/34

Abstract: A spark plug for an internal combustion engine includes a housing, an insulator, and a center electrode. The center electrode includes an inside electrode portion and an outside electrode portion. The housing includes a ground electrode projecting from a distal end portion of the housing toward the distal end side of the plug at a part in a plug circumferential direction. The outside electrode portion projects along a surface of the insulator tip in a direction away from a boundary with the inside electrode portion and includes a projection, which is capable of causing an electrical discharge between the ground electrode and the outside electrode portion. The projection is formed in a region in the plug circumferential direction. The projection and the ground electrode are located at positions different from each other in the plug circumferential direction.

公开(公告)号：US20200036165A1

公开(公告)日：2020-01-30

申请号：US16520392

申请日：2019-07-24

Applicant: DENSO CORPORATION

Inventor： Ryota WAKASUGI ,  Fumiaki AOKI ,  Daisuke TANAKA ,  Akimitsu SUGIURA ,  Tetsuya MIWA ,  Kanechiyo TERADA

IPC: H01T13/20

Abstract: In a spark plug for an internal combustion engine, a cylindrical insulator is arranged radially inside a cylindrical ground electrode, and includes an insulator protruding portion protruding further toward a distal end side in an axial direction than a distal end of the ground electrode. A center electrode is held radially inside the insulator, and includes an exposed portion exposed from a distal end of the insulator protruding portion. The spark plug generates a discharge from the exposed portion to the ground electrode, in a discharge gap formed along a surface of the insulator protruding portion. At least one of the exposed portion and the insulator protruding portion includes a flow inlet that is open on an outer circumferential surface thereof, a flow outlet that is open toward the discharge gap, and a communication passage communicating between the flow inlet and the flow outlet.

公开(公告)号：US20200028333A1

公开(公告)日：2020-01-23

申请号：US16584998

申请日：2019-09-27

Applicant: DENSO CORPORATION

Inventor： Shintaro ITOH ,  Daisuke TANAKA ,  Akimitsu SUGIURA ,  Ryota WAKASUGI ,  Kaori DOI ,  Kanechiyo TERADA ,  Tetsuya MIWA ,  Fumiaki AOKl

IPC: H01T13/32 ,  H01T13/52

Abstract: A spark plug has a tubular ground electrode, an insulator, and a center electrode. The insulator has an insulator protruding portion protruding to a tip end side in a plug axial direction with respect to the ground electrode. The center electrode 4 has an exposed portion exposed through a tip end of the insulator protruding portion. The exposed portion of the center electrode has a first part covering the insulator protruding portion from the tip end side in the plug axial direction, and a second part extending from the first part to a base end side in the plug axial direction and covering the entire circumference of an outer peripheral surface of the insulator protruding portion from an outer peripheral side in a plug radial direction.

公开(公告)号：US20180205204A1

公开(公告)日：2018-07-19

申请号：US15743732

申请日：2016-07-05

Applicant: DENSO CORPORATION

Inventor： Akimitsu SUGIURA ,  Kenji HATTORI ,  Shunichi TAKEDA ,  Kaori DOI ,  Ryota WAKASUGI

IPC: H01T15/00 ,  F02P3/04 ,  F02P13/00 ,  H01T13/38 ,  H01T13/08 ,  H01F38/12

CPC classification number: H01T15/00 ,  F02P3/02 ,  F02P3/04 ,  F02P13/00 ,  F02P15/00 ,  H01F38/12 ,  H01T13/04 ,  H01T13/08 ,  H01T13/20 ,  H01T13/32 ,  H01T13/38 ,  H01T13/42

Abstract: An ignition apparatus includes a spark plug and an ignition coil. The spark plug has a plug terminal protruding proximalward from an insulator. The ignition coil includes a coil main body, which includes a primary coil and a secondary coil, and a helical spring that electrically connects the secondary coil and the plug terminal. The plug terminal is made of a material that is both electrically conductive and magnetic. The plug terminal includes a terminal main body, which has an outer diameter greater than an inner diameter of the spring, and a terminal extension portion that has an outer diameter less than the inner diameter of the spring and extends proximalward from the terminal main body. A distal end portion of the spring abuts the terminal main body. The terminal extension portion is inserted and arranged in the spring. Between an outer circumferential surface of the terminal extension portion and an inner circumferential surface of the spring, there is interposed an insulating member.

公开(公告)号：US20160061177A1

公开(公告)日：2016-03-03

申请号：US14783901

申请日：2014-04-11

Applicant: DENSO CORPORATION

Inventor： Masahiro ISHITANI ,  Akimitsu SUGIURA ,  Makoto TORIYAMA ,  Satoru NAKAYAMA ,  Yuuki KONDOU ,  Hisaharu MORITA ,  Naoto HAYASHI ,  Yuuto TAMEI ,  Takashi OONO ,  Shunichi TAKEDA

IPC: F02P3/04 ,  F02P15/10

CPC classification number: F02P3/0435 ,  F02P11/06 ,  F02P15/10

Abstract: An ignition control apparatus of the present embodiment controls operation of an ignition plug provided so as to ignite an air-fuel mixed gas. The ignition control apparatus is characterized in that the ignition control apparatus includes: an ignition coil provided with a primary winding which allows a current to pass as a primary current therethrough and a second winding connected to the ignition coil, an increase and a decrease in the primary current generating a secondary current passing through the secondary winding; a DC power supply provided with a non-ground side output terminal, the non-ground side output terminal being connected to one end of the primary winding so that the primary current is made to pass through the primary winding; a first switching element configured of a semiconductor switching element provided with a first control terminal, a fist power side terminal, and a first ground side terminal, the semiconductor switching element controlling on and off states of current supply between the first power side terminal and the first ground side terminal based on a first control signal inputted to the first control terminal, the first power side terminal being connected to the other end side of the primary winding, the first ground side terminal being connected to a ground side; a second switching element configured of a semiconductor switching element provided with a second control terminal, a second power side terminal, and a second ground side terminal, the semiconductor switching element controlling on and off states of current supply between the second power side terminal and the second ground side terminal based on a second control signal inputted to the second control terminal, the second ground side terminal being connected to the other end side of the primary winding; a third switching element configured of a semiconductor switching element provided with a third control terminal, a third power side terminal, and a third ground side terminal, the semiconductor switching element controlling on and off states of current supply between the third power side terminal and the third ground side terminal based on a third control signal inputted to the third control terminal, the third power side terminal being connected to the second power side terminal of the second switching element, the third ground side terminal being connected to the ground side; and an energy accumulation coil configured of an inductor, the inductor being interposed in a power line connecting the non-ground side output terminal of the DC power supply and the third power side terminal of the third switching element, the energy accumulation coil accumulating energy therein in response to turning on of the third switching element.

公开(公告)号：US20130112164A1

公开(公告)日：2013-05-09

申请号：US13671306

申请日：2012-11-07

Applicant: Nippon Soken, Inc. ,  Denso Corporation

Inventor： Shingo MORISHIMA ,  Kenji KANEHARA ,  Yuya ABE ,  Akimitsu SUGIURA

IPC: F02P23/00

CPC classification number: F02P23/04

Abstract: A laser ignition apparatus includes a housing that has a male-threaded portion for fixing the housing and a hexagonal portion for tightening the male-threaded portion. Between a combustion chamber-side end of the male-threaded portion and an anti-combustion chamber-side end of the hexagonal portion, there is defined a non-optical element arrangement region in which none of an introducing optical element, an enlarging optical element and a focusing optical element of the apparatus is arranged. At one of a combustion chamber-side end and an anti-combustion chamber-side end of the non-optical element arrangement region, there is formed a reference surface that extends perpendicular to an axial direction of the housing. One of the introducing optical element, the enlarging optical element and the focusing optical element is received in the housing in such a manner as to be elastically pressed against the reference surface from outside of the non-optical element arrangement region.

Abstract translation: 激光点火装置包括具有用于固定壳体的阳螺纹部分和用于紧固阳螺纹部分的六边形部分的壳体。 在阳螺纹部分的燃烧室侧端部和六边形部分的防燃室侧端部之间，限定了非光学元件配置区域，其中不引入光学元件，放大光学元件 并且设置该装置的聚焦光学元件。 在非光学元件排列区域的燃烧室侧端部和防燃室侧端部之一形成有垂直于壳体的轴向延伸的基准面。 引入光学元件，放大光学元件和聚焦光学元件中的一个以从非光学元件布置区域的外部弹性地压靠基准面的方式被容纳在外壳中。

公开(公告)号：US20230094043A1

公开(公告)日：2023-03-30

申请号：US18074722

申请日：2022-12-05

Applicant: DENSO CORPORATION

Inventor： Akimitsu SUGIURA

IPC: H01T13/32 ,  H01T13/34 ,  H01T13/54

Abstract: A spark plug includes: a cylindrical insulator; a center electrode, held on an inner circumferential side of the insulator, protruding from the insulator toward a tip end side; a cylindrical housing holding the insulator on an inner circumferential side; a ground electrode forming a discharge gap between the ground electrode and the center electrode on the inner circumferential side of the housing; and a plug cover provided in a tip end portion of the housing to cover a pre-combustion chamber in which the discharge gap is arranged. The plug cover is provided with an injection hole that communicates the pre-combustion chamber to the outside. The ground electrode includes a discharge-side end portion that faces the discharge gap and a joining-side end portion that is joined to the housing. The discharge-side end portion is arranged further toward a base end side in an axial direction than the joining-side end portion is.

公开(公告)号：US20220251999A1

公开(公告)日：2022-08-11

申请号：US17732317

申请日：2022-04-28

Applicant: DENSO CORPORATION

Inventor： Shota KINOSHITA ,  Akimitsu SUGIURA

IPC: F02B19/12

Abstract: An ignition device of the present embodiment is an ignition device for an internal combustion and includes an ignition plug, an operating information acquisition unit and an ignition control unit. The ignition plug includes an accessory chamber and an injection hole from which flame is to be injected from the accessory chamber to a main combustion chamber. The operating information acquisition unit is configured to acquire operating information regarding an operating state of the internal combustion. The ignition control unit is configured to control an ignition energy profile that affects an ignition state of an air-fuel mixture based on the operating information acquired by the operating information acquisition unit.