公开(公告)号：US10288033B2

公开(公告)日：2019-05-14

申请号：US15302543

申请日：2015-04-10

Applicant: DENSO CORPORATION

Inventor： Makoto Toriyama ,  Satoru Nakayama

IPC: F02P11/00 ,  F02P3/00 ,  F02P3/04 ,  F02P3/045 ,  F02P9/00 ,  F02P3/08 ,  F02P15/10

Abstract: When an abnormality judgement section judges that there is a failure of an energy inputting circuit, an energy inputting line, through which electrical energy is inputted from the energy inputting circuit to a primary winding, is changed over to a disconnected state by output halt switching means. As a result, since inputting of electrical energy to the primary winding is thereby halted, problems arising due to continuation of inputting electrical energy to the energy inputting circuit can be prevented, even in the event of a failure of the energy inputting circuit, so that reliability can be enhanced.

公开(公告)号：US09771918B2

公开(公告)日：2017-09-26

申请号：US14783898

申请日：2014-04-11

Applicant: DENSO CORPORATION

Inventor： Satoru Nakayama ,  Makoto Toriyama ,  Akimitsu Sugiura ,  Masahiro Ishitani ,  Yuuki Kondou ,  Kanechiyo Terada

IPC: F02P9/00 ,  F02P3/08 ,  F02P3/09 ,  F02P3/045 ,  F02P3/05 ,  F02P5/15 ,  F02P3/00 ,  F02P15/10 ,  F02P3/04

CPC classification number: F02P9/002 ,  F02P3/005 ,  F02P3/0407 ,  F02P3/0453 ,  F02P3/05 ,  F02P3/0876 ,  F02P3/09 ,  F02P5/1502 ,  F02P15/10 ,  Y02T10/46

Abstract: It is possible to adjust electromagnetic energy introduced from a low-voltage side of a primary winding 20 of an ignition coil 2 after start discharging to a spark plug 1 from the ignition coil 2 in the correct proportion by threshold-determining either one or both of a primary voltage V1 applied to a primary side of the ignition coil 2 and a secondary current I2 flowing in a secondary side of the ignition coil 2, and by opening and closing a discharging switch 32 disposed between an auxiliary power supply 3 including an energy storage coil 330 and a low-voltage side terminal 201 of the ignition coil 2.

公开(公告)号：US10041463B2

公开(公告)日：2018-08-07

申请号：US15302552

申请日：2015-04-09

Applicant: DENSO CORPORATION

Inventor： Makoto Toriyama ,  Shunichi Takeda ,  Kanechiyo Terada ,  Satoru Nakayama ,  Takashi Oono

IPC: F02P15/10 ,  F02P3/08 ,  F02P9/00 ,  F02P3/04 ,  F02P5/15

Abstract: According to an ignition device, a first switching unit applies a voltage between electrodes of by spark plug by turning on/off energization from an on-vehicle battery to a primary coil. Further, a second switching unit applies a voltage having the same direction as a spark discharge generated by turning on/off the first switching unit between the electrodes of the spark plug by supplying electrical energy accumulated in a booster circuit into a primary coil. Accordingly, it is possible to greatly reduce a complexity of the on/off switching of the first and second switching units compared to a conventional technology.

公开(公告)号：US10697419B2

公开(公告)日：2020-06-30

申请号：US16079120

申请日：2017-02-13

Applicant: DENSO CORPORATION

Inventor： Daisuke Tanaka ,  Shota Kinoshita ,  Noriaki Nishio ,  Satoru Nakayama

IPC: F02P3/05 ,  F02P15/00 ,  H01T13/20 ,  F02P9/00 ,  H01T13/14 ,  F02P15/10 ,  F02P3/01 ,  F02P7/03 ,  F02P17/12 ,  F02P3/04

Abstract: An ignition control apparatus applied to an internal combustion engine including a spark plug includes an in-cylinder pressure acquisition section, a frequency signal transmitting section which transmits a frequency signal having a predetermined frequency to a switching element, and a weak discharge generating section which causes the frequency signal to be transmitted during an intake stroke and controls the frequency signal such that a weak discharge is generated at the spark plug a plurality of times. The weak discharge generating section controls the frequency signal so as to cause a duty ratio of the switching element to be changed in accordance with the in-cylinder pressure, such that the frequency of generating weak discharges during a time period in which the frequency signal is transmitted becomes higher than a predetermined frequency.

公开(公告)号：US09957944B2

公开(公告)日：2018-05-01

申请号：US15302550

申请日：2015-04-07

Applicant: DENSO CORPORATION

Inventor： Satoru Nakayama

IPC: F02P3/05 ,  F02P17/12

CPC classification number: F02P3/05 ,  F02P3/0442 ,  F02P3/053 ,  F02P3/0892 ,  F02P9/007 ,  F02P15/10 ,  F02P17/12

Abstract: An ignition apparatus includes a blow-off determining unit 5b. The blow-off determining unit 5b determines, when the value ΔI2 of the time derivative of a secondary electric current exceeds a predetermined threshold value Z 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 3. 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 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 secondary electric current value I2x immediately before the occurrence of blow-off. Consequently, in the next cycle, it is possible to reliably prevent blow-off, thereby reliably preventing misfire.

公开(公告)号：US09897062B2

公开(公告)日：2018-02-20

申请号：US15039857

申请日：2014-11-28

Applicant: DENSO CORPORATION

Inventor： Satoru Nakayama ,  Makoto Toriyama ,  Akimitsu Sugiura ,  Masahiro Ishitani ,  Atsuya Mizutani ,  Kouji Andoh ,  Naoto Hayashi ,  Kaori Doi

IPC: F02P15/10 ,  F02P17/12 ,  F02P5/145 ,  F02P3/05 ,  F02P3/04 ,  F02P5/15 ,  F02P9/00

CPC classification number: F02P15/10 ,  F02P3/0407 ,  F02P3/0442 ,  F02P3/05 ,  F02P3/051 ,  F02P3/0892 ,  F02P5/145 ,  F02P5/15 ,  F02P9/002 ,  F02P9/007 ,  F02P17/12 ,  Y02T10/46

Abstract: An ignition device at least equipped with a DC power source, an ignition coil unit, a spark plug, an ignition switch, and an auxiliary power source, wherein the auxiliary power source is at least equipped with a discharge energy accumulating means, a discharge switch, and a discharge driver. The ignition device is further equipped with a secondary-current feedback controlling means comprising a secondary current detecting means for detecting a secondary current flowing during the ignition coil unit discharge period, and a secondary current feedback control circuit-for determining an upper limit and a lower limit for the secondary current from binary threshold values, and driving so as to open and close the discharge switch on the basis of the determination results. Furthermore, energy is introduced from the auxiliary power source without switching the polarity of the secondary current.

公开(公告)号：US20170037826A1

公开(公告)日：2017-02-09

申请号：US15302550

申请日：2015-04-07

Applicant: DENSO CORPORATION

Inventor： Satoru Nakayama

IPC: F02P3/05 ,  F02P17/12

CPC classification number: F02P3/05 ,  F02P3/0442 ,  F02P3/053 ,  F02P3/0892 ,  F02P9/007 ,  F02P15/10 ,  F02P17/12

Abstract: An ignition apparatus includes a blow-off determining unit 5b. The blow-off determining unit 5b determines, when the value ΔI2 of the time derivative of a secondary electric current exceeds a predetermined threshold value Z 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 3. 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 in performing the continuing spark discharge is set-to an electric current value that is obtained by adding a predetermined electric current value a to the secondary electric current value I2x immediately before the occurrence of blow-off. Consequently, in the next cycle, it is possible to reliably prevent blow-off, thereby reliably preventing misfire.

Abstract translation: 点火装置包括吹出判定单元5b。 吹出判定部5b，在判断期间，当二次电流的时间导数的值ΔI2超过规定的阈值Z时，判断为发生了溢流; 确定期间是从主点火回路3开始火花放电开始的预定时间段ΔT。此外，当确定在主点火（全晶体管点火）期间已经发生溢流时，控制为 在下一个循环中，在主点火之后继续发生火花放电。 此外，进行持续火花放电的次级电流指令值被设定为通过在紧接出现吹出之前将预定电流值a与次级电流值I2x相加而获得的电流值。 因此，在下一循环中，可以可靠地防止吹出，从而可靠地防止失火。

公开(公告)号：US10302062B2

公开(公告)日：2019-05-28

申请号：US15680265

申请日：2017-08-18

Applicant: DENSO CORPORATION

Inventor： Masahiro Ishitani ,  Akimitsu Sugiura ,  Makoto Toriyama ,  Satoru Nakayama ,  Yuuki Kondou ,  Hisaharu Morita ,  Naoto Hayashi ,  Yuuto Tamei ,  Takashi Oono ,  Shunichi Takeda

IPC: F02P3/04 ,  F02P15/10 ,  F02P11/06

Abstract: An ignition control apparatus of the present embodiment controls operation of an ignition plug provided so as to ignite an air-fuel mixed gas. The ignition control apparatus is characterized in that the ignition control apparatus includes: an ignition coil provided with a primary winding which allows a current to pass as a primary current therethrough and a second winding connected to the ignition coil, an increase and a decrease in the primary current generating a secondary current passing through the secondary winding; a DC power supply provided with a non-ground side output terminal, the non-ground side output terminal being connected to one end of the primary winding so that the primary current is made to pass through the primary winding; a first switching element configured of a semiconductor switching element provided with a first control terminal, a first power side terminal, and a first ground side terminal, the semiconductor switching element controlling on and off states of current supply between the first power side terminal and the first ground side terminal based on a first control signal inputted to the first control terminal, the first power side terminal being connected to the other end side of the primary winding, the first ground side terminal being connected to a ground side; a second switching element configured of a semiconductor switching element provided with a second control terminal, a second power side terminal, and a second ground side terminal, the semiconductor switching element controlling on and off states of current supply between the second power side terminal and the second ground side terminal based on a second control signal inputted to the second control terminal, the second ground side terminal being connected to the other end side of the primary winding; a third switching element configured of a semiconductor switching element provided with a third control terminal, a third power side terminal, and a third ground side terminal, the semiconductor switching element controlling on and off states of current supply between the third power side terminal and the third ground side terminal based on a third control signal inputted to the third control terminal, the third power side terminal being connected to the second power side terminal of the second switching element, the third ground side terminal being connected to the ground side; and an energy accumulation coil configured of an inductor, the inductor being interposed in a power line connecting the non-ground side output terminal of the DC power supply and the third power side terminal of the third switching element, the energy accumulation coil accumulating energy therein in response to turning on of the third switching element.

公开(公告)号：US10161376B2

公开(公告)日：2018-12-25

申请号：US14893740

申请日：2014-05-20

Applicant: DENSO CORPORATION

Inventor： Satoru Nakayama ,  Makoto Toriyama ,  Akimitsu Sugiura ,  Masahiro Ishitani ,  Yuuki Kondou

IPC: F02P9/00 ,  F02P3/00 ,  F02P5/145 ,  F02P5/15 ,  F02P7/03 ,  F02P3/08 ,  F02P15/10

Abstract: An ignition control apparatus for engines is provided. The ignition control apparatus is designed to control a switch to release energy stored in a capacitor during spark discharge, thereby supplying a primary current to an other end side opposite a one end of a primary winding of an ignition coil connected to a dc power supply. This provides the ignition control apparatus which is capable of minimizing an increase in size or manufacturing cost and stabilizing the state of combustion of an air-fuel mixture.

公开(公告)号：US10082125B2

公开(公告)日：2018-09-25

申请号：US15302072

申请日：2015-04-09

Applicant: DENSO CORPORATION

Inventor： Hidekazu Fujimoto ,  Makoto Toriyama ,  Satoru Nakayama ,  Yasuomi Imanaka ,  Kanechiyo Terada ,  Shunichi Takeda ,  Kaori Doi ,  Junichi Wada ,  Hisaharu Morita ,  Naohisa Nakamura

IPC: F02P11/06 ,  F02P3/05 ,  F02P9/00 ,  F02D9/08 ,  F02D37/02 ,  F02D41/22 ,  F02D41/30

CPC classification number: 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 ,  Y02T10/46

Abstract: 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.