公开(公告)号：US20190057808A1

公开(公告)日：2019-02-21

申请号：US16077526

申请日：2016-12-20

Applicant: DENSO CORPORATION

Inventor： Shota KINOSHITA ,  Kazuki FUKATSU ,  Fumiaki AOKI ,  Akimitsu SUGIURA

IPC: H01F27/36 ,  F02P3/01 ,  H01F27/28 ,  H01F27/24 ,  H01F27/02 ,  H01F38/12

CPC classification number: H01F27/365 ,  F02P3/01 ,  F02P15/00 ,  H01F3/14 ,  H01F27/02 ,  H01F27/24 ,  H01F27/28 ,  H01F38/12

Abstract: A step-up transformer, an oscillator, and an ignition plug are comprised. The step-up transformer has a primary winding, a secondary winding, and a core. The ignition plug is connected to a first end of the secondary winding. A gap is formed in the core. The step up transformed is provided with a shielding part which is made of a conductive material and shields the magnetic flux leaking from the gap. A second end of the secondary winding is electrically connected to the shielding part.