-
公开(公告)号：US20180180014A1
公开(公告)日：2018-06-28
申请号：US15900841
申请日：2018-02-21
Applicant: DENSO CORPORATION
Inventor： Naoto HAYASHI , Makoto TORIYAMA , Kaori DOI , Kenechiyo TERADA , Kenta KYOUDA , Satoru NAKAYAMA
CPC classification number: F02P3/045 , F02P3/0876 , F02P5/15 , F02P9/00 , F02P9/002 , F02P9/007 , F02P15/08 , F02P15/10
Abstract: An ignition apparatus inputs energy during a predetermined energy input period after the interruption of a primary electric current by an ignition switch and a discharge of an ignition plug caused by a secondary electric current. Moreover, the ignition apparatus includes a blow-off detection unit that detects, during the energy input period IGW after the start of the discharge by the ignition plug, occurrence of blow-off of the discharge. When the secondary electric current I2 drops below a blow-off detection electric current threshold value Ibo at a time instant tbo in a “second region” where it is impossible to perform a re-discharge after blow-off, the blow-off detection unit determines that blow-off has occurred and the ignition apparatus stops the energy input from an energy input unit to an ignition coil. By preventing unnecessary energy input, it is possible to suppress unnecessary electric power consumption and wear of electrodes of the ignition plug.
-
公开(公告)号：US20170117078A1
公开(公告)日：2017-04-27
申请号：US15301789
申请日：2015-04-07
Applicant: DENSO CORPORATION
Inventor： Kenta KYOUDA , Satoru NAKAYAMA
CPC classification number: F02P15/10 , F02D2200/101 , F02P3/0442 , F02P3/0846 , F02P3/0876 , F02P3/09 , F02P5/15 , F02P9/007 , F02P17/12 , H01F7/064 , H01F38/12 , Y02T10/46
Abstract: An ignition apparatus includes a blow-off determining unit. The blow-off determining unit determines, when a secondary electric current drops below a predetermined threshold value Ia during a determination period, that blow-off has occurred; the determination period is a predetermined time period ΔT from the start of a spark discharge by a main ignition circuit. Further, when it is determined that blow-off has occurred during a main ignition (full-transistor ignition), it is controlled to perform a continuing spark discharge after the main ignition in a next cycle. Moreover, a secondary electric current command value I2a in performing the continuing spark discharge is set to an electric current value that is obtained by adding a predetermined electric current value α to the predetermined threshold value Ia used in the blow-off determination. Consequently, in the next cycle, it is possible to reliably prevent blow-off, thereby reliably preventing a misfire.
-
公开(公告)号：US20170022957A1
公开(公告)日：2017-01-26
申请号：US15302540
申请日：2015-04-07
Applicant: DENSO CORPORATION
Inventor： Naoto HAYASHI , Makoto TORIYAMA , Kaori DOI , Kenechiyo TERADA , Kenta KYOUDA , Satoru NAKAYAMA
CPC classification number: F02P3/045 , F02P3/0876 , F02P5/15 , F02P9/00 , F02P9/002 , F02P9/007 , F02P15/08 , F02P15/10
Abstract: An ignition apparatus inputs energy during a predetermined energy input period after the interruption of a primary electric current by an ignition switch and a discharge of an ignition plug caused by a secondary electric current. Moreover, the ignition apparatus includes a blow-off detection unit that detects, during the energy input period IGW after the start of the discharge by the ignition plug, occurrence of blow-off of the discharge. When the secondary electric current I2 drops below a blow-off detection electric current threshold value Ibo at a time instant tbo in a “second region” where it is impossible to perform a re-discharge after blow-off, the blow-off detection unit determines that blow-off has occurred and the ignition apparatus stops the energy input from an energy input unit to an ignition coil. By preventing unnecessary energy input, it is possible to suppress unnecessary electric power consumption and wear of electrodes of the ignition plug.
Abstract translation: 点火装置在通过点火开关中断初级电流之后的预定能量输入期间和由二次电流引起的火花塞的放电时输入能量。 此外，点火装置包括吹出检测单元，其在通过火花塞开始放电之后的能量输入期间IGW期间检测放电的发生。 当二次电流I2在不能在吹出后进行再放电的“第二区域”中的时刻tbo的时间点下降到低于泄漏检测电流阈值Ibo时，吹出检测单元 确定已经发生吹出，并且点火装置停止从能量输入单元到点火线圈的能量输入。 通过防止不必要的能量输入，可以抑制火花塞的电极的不必要的电力消耗和磨损。
-
-
Search Results
3
records
(took 0.011 seconds)
