公开(公告)号：US20230395318A1

公开(公告)日：2023-12-07

申请号：US18449742

申请日：2023-08-15

Applicant: DENSO CORPORATION

Inventor： Norihiro ADACHI ,  Kanechiyo TERADA ,  Tetsuya MIWA

IPC: H01F38/12 ,  F02P3/02 ,  F02P13/00

CPC classification number: H01F38/12 ,  F02P3/02 ,  F02P13/00 ,  H01F2038/122

Abstract: An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

公开(公告)号：US20220277894A1

公开(公告)日：2022-09-01

申请号：US17747024

申请日：2022-05-18

Applicant: DENSO CORPORATION

Inventor： Norihiro ADACHI ,  Kanechiyo TERADA ,  Tetsuya MIWA

IPC: H01F38/12 ,  F02P3/02 ,  F02P13/00

Abstract: An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

公开(公告)号：US20220013283A1

公开(公告)日：2022-01-13

申请号：US17448741

申请日：2021-09-24

Applicant: DENSO CORPORATION

Inventor： Norihiro ADACHI ,  Kanechiyo TERADA ,  Tetsuya MIWA

IPC: H01F38/12 ,  F02P13/00 ,  F02P3/02

Abstract: An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

公开(公告)号：US20230093588A1

公开(公告)日：2023-03-23

申请号：US18071957

申请日：2022-11-30

Applicant: DENSO CORPORATION

Inventor： Norihiro ADACHI ,  Kanechiyo TERADA ,  Tetsuya MIWA

IPC: H01F38/12 ,  F02P3/02 ,  F02P13/00

Abstract: An ignition coil for an internal combustion engine includes a primary bobbin including a winding cylinder part and a connection part between the winding cylinder part and a connector part, a primary coil including a primary main coil and a primary sub coil, and a secondary coil. When one of the primary main coil and the primary sub coil that includes an innermost coil part around the winding cylinder part is defined as a firstly-wound coil and the other is defined as a secondly-wound coil, firstly-wound ends, which are ends of the firstly-wound coil, and secondly-wound ends, which are ends of the secondly-wound coil, are attached to the connection part, and a shortest distance from a central axis of the winding cylinder part to each of the firstly-wound ends is smaller than a shortest distance from the central axis of the winding cylinder part to each of the secondly-wound ends.

公开(公告)号：US20210249187A1

公开(公告)日：2021-08-12

申请号：US17171345

申请日：2021-02-09

Applicant: DENSO CORPORATION

Inventor： Norihiro ADACHI ,  Junichi WADA

IPC: H01F38/12 ,  H01F27/26

Abstract: An ignition coil includes a center core, a first core member, and a second core member. The first core member includes a first core-facing portion facing a front core surface of the center core and a first core side portion extending rearward from the first core-facing portion. The second core member includes a second core-facing portion facing a rear core surface of the center core and a second core side portion extending frontward from the second core-facing portion. The first core-facing portion has an end surface contacting a portion of the second core side portion to create a first contact region. Similarly, the second core-facing portion has an end surface contacting a portion of the first core side portion to create a second contact region. The first and second contact regions are shaped to approach frontward close to the first core side portion. This structure enhances productivity of the ignition coil.