公开(公告)号：US10415533B2

公开(公告)日：2019-09-17

申请号：US15573914

申请日：2016-05-12

Applicant: DENSO CORPORATION ,  SOKEN, INC.

Inventor： Hideaki Kosuge ,  Fumiaki Aoki ,  Shohei Ishida ,  Shunichi Takeda ,  Kazuaki Ueda

IPC: F02P3/00 ,  F02P15/10 ,  F02P17/12 ,  F02P3/05 ,  F02P9/00 ,  H01T13/58 ,  F02P3/04 ,  F02D41/14 ,  F02P3/08 ,  F02D35/02

Abstract: An ignition apparatus for internal combustion engines is provided. The ignition apparatus is equipped with an ECU. The ECU monitors a path length of a discharge of a spark for a period of time in which a second circuit delivers or inputs energy in the form of a threshold value determination. When the path length has become too short, the ECU determines that ignition is expected to be delayed and then selects a special mode to control the delay of the ignition. The ECU increase a target value of an energy input amount. This enables the delay of ignition resulting from a short extension of the path length to be minimized. The ignition apparatus equipped with the second circuit to continue the discharge of sparks is, thus, capable of reducing a variation in ignition without the need for uniformly increasing the energy input amount.

公开(公告)号：US09825431B2

公开(公告)日：2017-11-21

申请号：US14554763

申请日：2014-11-26

Applicant: DENSO CORPORATION

Inventor： Hideaki Kosuge ,  Shinichi Okabe ,  Akimitsu Sugiura

IPC: H01T13/20 ,  H01T13/32 ,  H01T13/08 ,  H01T13/52 ,  H01T13/50 ,  F02P23/04

CPC classification number: H01T13/20 ,  F02P23/045 ,  H01T13/08 ,  H01T13/32 ,  H01T13/50 ,  H01T13/52

Abstract: An ignition device includes a center electrode, a center dielectric covering the center electrode, a ground electrode disposed so as to form a discharge space with the center dielectric, and a high energy source for applying an AC voltage between the center electrode and the ground electrode to generate a streamer discharge. A distal end portion of the center electrode projects beyond a distal end of the ground electrode to an inside of the combustion chamber of an internal combustion engine to make a dielectric discharge portion. The ground electrode is formed with an airflow inlet and en airflow outlet at a lateral portion thereof for enabling an in-cylinder airflow to be introduced into the discharge space. A distal end portion of the ground electrode projects radially inward to make a ground electrode projecting portion so that a discharge space narrow portion is formed with the dielectric discharge portion.