公开(公告)号：US20170114766A1

公开(公告)日：2017-04-27

申请号：US15301577

申请日：2015-04-03

申请人： DENSO CORPORATION

发明人： Hidekazu FUJIMOTO ,  Satoru NAKAYAMA

IPC分类号： F02P3/05 ,  H01F38/12 ,  F02P5/145

CPC分类号： F02P3/05 ,  F02P3/00 ,  F02P3/0442 ,  F02P3/0892 ,  F02P5/145 ,  F02P5/1502 ,  F02P9/007 ,  F02P15/10 ,  H01F38/12

摘要： A discharge control unit causes a high voltage to be generated in a secondary coil by controlling an igniter unit so as to block a flow of current from a primary coil towards a ground side, and controls a spark plug so that electric discharge is formed between electrodes of the spark plug. An energy input control unit controls an energy input unit to input electrical energy to an ignition coil after start of control of the spark plug by the discharge control unit. A normal ignition control unit controls ignition of an air-fuel mixture in a combustion chamber only through control of the spark plug by the discharge control unit. A specific ignition control unit controls the ignition of the air-fuel mixture in the combustion chamber through control of the spark plug by the discharge control unit and through control of the energy input unit by the energy input control unit. A control unit performs ignition control by the specific ignition control unit until a first predetermined period elapses after a start-up condition of an engine is established, and switches to ignition control by the normal ignition control unit after the elapse of the first predetermined period.

公开(公告)号：US20170279248A1

公开(公告)日：2017-09-28

申请号：US15464716

申请日：2017-03-21

申请人： DENSO CORPORATION

发明人： Ryohei AKIYOSHI ,  Hidekazu FUJIMOTO

IPC分类号： H01T13/32

CPC分类号： H01T13/32

摘要： A spark plug for an internal combustion engine provided with a cylindrical housing, a ceramic insulator, a center electrode and a ground electrode. The ground electrode has a body base disposed from a front end surface of the cylindrical housing to a front end-side thereof. The ground electrode has a spark discharge gap formed therebetween itself and the center electrode. The body base is provided with pair of side-connecting surfaces which connect the inner surface and the outer surface. Each of the side-connecting surfaces having a side flat surface which is a flat surface parallel to an aligning direction of the center electrode and the body base. A distance between the pair of the side flat surfaces is a maximum width of the body base. A minimum distance between the inner surface and the side flat surface satisfies a relationship of 0.1 mm≦L≦0.5 mm, in the aligning direction.

公开(公告)号：US20170159634A1

公开(公告)日：2017-06-08

申请号：US15302072

申请日：2015-04-09

申请人： DENSO CORPORATION

发明人： Hidekazu FUJIMOTO ,  Makoto TORIYAMA ,  Satoru NAKAYAMA ,  Yasuomi IMANAKA ,  Kanechiyo TERADA ,  Shunichi TAKEDA ,  Kaori DOI ,  Junichi WADA ,  Hisaharu MORITA ,  Naohisa NAKAMURA

IPC分类号： F02P11/06 ,  F02D41/30 ,  F02D37/02 ,  F02D41/22 ,  F02P9/00 ,  F02D9/08

CPC分类号： F02P11/06 ,  F02D9/08 ,  F02D37/02 ,  F02D41/0002 ,  F02D41/20 ,  F02D41/22 ,  F02D41/221 ,  F02D41/3005 ,  F02D2041/2058 ,  F02D2041/227 ,  F02P3/053 ,  F02P5/1502 ,  F02P9/002 ,  F02P9/007 ,  F02P15/10 ,  F02P17/00 ,  Y02T10/42

摘要： In a control apparatus, a discharge control unit controls an igniter unit so that a flow of current from a primary coil towards a ground side is blocked, thereby generating a high voltage in a secondary coil, and controls a spark plug so that the spark plug generates electric discharge. An energy input control unit controls an energy input unit so as to input electrical energy to an ignition coil after the start of control of the spark plug by the discharge control unit. A control unit and an abnormality detecting unit detects an abnormality in the igniter unit or the ignition coil based on a first threshold and a first current value that is a value corresponding to a current detected by a current detection circuit at this time, when a first predetermined period elapses after the start of control of the spark plug by the discharge control unit.