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公开(公告)号：US20190242353A1
公开(公告)日：2019-08-08
申请号：US16386352
申请日：2019-04-17
Applicant: DENSO CORPORATION
Inventor： Shunichi TAKEDA , Mitsunobu NIWA , Hisaharu MORITA
CPC classification number: F02P3/05 , F02P3/0442 , F02P3/0846 , F02P3/0876 , F02P5/15 , F02P9/007 , F02P17/12 , Y02T10/46
Abstract: An ignition control device includes a main ignition circuit to generate a spark discharge to a spark plug by controlling energization of a primary coil of an ignition coil for an internal combustion engine, an energy supply circuit that supplies energy based on a discharge continuation signal by controlling the energization of the primary coil during the spark discharge started by the operation of the main ignition circuit to supply a secondary current in the same direction as a main ignition continuously in a secondary coil of the ignition coil, a secondary current command circuit for outputting a command value of the secondary current based on the secondary current command signal, and an ignition control unit for setting signal values of the secondary current command signal and the discharge continuation signal.
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公开(公告)号：US20190120198A1
公开(公告)日：2019-04-25
申请号：US16166542
申请日：2018-10-22
Applicant: DENSO CORPORATION
Inventor： Keiko MIYAKE , Shunichi TAKEDA , Kanechiyo TERADA , Tetsuya MIWA
Abstract: In an ignition apparatus, a controller outputs a discharge start signal instructing a start of a discharge in the spark plug, and a discharge control signal instructing control of a discharge current in the spark plug after the start of the discharge. A signal line connects between the controller and a control circuit. The discharge start signal and the discharge control signal are transferred from the controller to the control circuit via the signal line. The controller modulates, based on the plural command values, the discharge control signal such that the modulated discharge control signal includes information representing the plural command values and change timings for the respective command values. The control circuit controls, based on the discharge start signal and the modified discharge control signal, the energization circuit to thereby adjust the discharge current to each of the command values at a corresponding one of the change timings.
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公开(公告)号：US20180245562A1
公开(公告)日：2018-08-30
申请号：US15753227
申请日：2016-07-26
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Shohei ISHIDA , Shunichi TAKEDA
Abstract: In an ignition device, a second circuit energizes a primary coil from its negative side in a first direction to thereby maintain energization of a second coil in a second direction during spark discharge started by a first circuit. The maintained energization continuously supplies energy to a spark plug, thus performing a continuation of the spark discharge. The first direction is opposite to a direction of energization of the primary coil carried out by the first circuit, and the second direction is the same as a direction of energization of the second coil that has been started based on the first circuit. A humidity detection unit detects humidity of intake air into an engine. The control section controls the first circuit to advance start timing of the spark discharge generated by the first circuit in accordance with an increase in the humidity of the intake air.
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公开(公告)号：US20180223790A1
公开(公告)日：2018-08-09
申请号：US15749555
申请日：2016-07-15
Applicant: DENSO CORPORATION
Inventor： Shunichi TAKEDA
Abstract: The return circuit of the ignition device returns to the battery the current supplied to the primary coil by the operation of the second circuit, and the voltage detection unit detects the voltage VB. The operation stopping unit monitors the voltage VB and when it is determined that the voltage VB is excessive, that is, when the voltage VB exceeds the threshold voltage VBc, it stops the supply of energy by the second circuit. As a result, when a load dump state occurs, the supply of energy by the second circuit can be stopped. Thus, when a load dump state occurs by the operation of the second circuit, other devices can be protected from overvoltage.
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公开(公告)号：US20170022961A1
公开(公告)日：2017-01-26
申请号：US15302552
申请日：2015-04-09
Applicant: DENSO CORPORATION
Inventor： Makoto TORIYAMA , Shunichi TAKEDA , Kanechiyo TERADA , Satoru NAKAYAMA , Takashi OONO
CPC classification number: F02P3/08 , F02P3/0442 , F02P3/0892 , F02P5/15 , F02P9/00 , F02P9/007 , F02P15/10
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.
Abstract translation: 根据点火装置，第一开关单元通过从车载电池接通/断开通电至初级线圈，通过火花塞的电极之间施加电压。 此外，第二开关单元通过将升压电路中蓄积的电能提供给初级线圈，施加与火花塞的电极之间接通/断开第一开关单元产生的火花放电相同的方向的电压。 因此，与传统技术相比，可以大大降低第一和第二开关单元的接通/断开切换的复杂性。
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Patent Agency Ranking
公开(公告)号：US20190078528A1
公开(公告)日：2019-03-14
申请号：US16080436
申请日：2017-02-13
Applicant: DENSO CORPORATION
Inventor： Michiyasu MORITSUGU , Shunichi TAKEDA
Abstract: A failure diagnosis device for an ignition circuit, comprising: an ignition plug; an ignition coil; a capacitor series connection including a high side capacitor and a low side capacitor; a switching-element series connection including a high side switching element and a low side switching element; an inter-terminal voltage detection unit for detecting an inter-terminal voltage of the capacitor series connection; an intermediate voltage detection unit for detecting an intermediate voltage at the connection point of the high side capacitor and the low side capacitor; and a determination unit for determining a failure location of the ignition circuit based on at least one of the inter-terminal voltage and the intermediate voltage.
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公开(公告)号：US20180277302A1
公开(公告)日：2018-09-27
申请号：US15920539
申请日：2018-03-14
Applicant: SANKEN ELECTRIC CO., LTD. , DENSO CORPORATION
Inventor： Nobuaki SEKINE , Shunichi TAKEDA
CPC classification number: H01F38/12 , F02P3/01 , F02P3/05 , F02P9/007 , H01T15/00 , H02J7/0063 , H02J7/1446 , H02M1/36 , H02M3/335 , H03K3/017
Abstract: An ignition coil includes a first winding, a second winding, and a third winding. A first switch is electrically connected to the first winding. A battery is electrically connected to the first winding. A booster is electrically connected to the battery. A second switch is electrically connected to the third winding. A drive device drives the first switch and the second switch. The drive device turns the first switch from on-state to off-state to allow a secondary current to flow through the second winding, turns the second switch from off-state to on-state to supply an output of the booster to the third winding, and superimpose a second current to the second winding. When a third winding current becomes equal to or greater than a predetermined value, the booster controls such that power generated by the third winding current and an output voltage of the booster is restricted to constant power.
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公开(公告)号：US20180205204A1
公开(公告)日：2018-07-19
申请号：US15743732
申请日：2016-07-05
Applicant: DENSO CORPORATION
Inventor： Akimitsu SUGIURA , Kenji HATTORI , Shunichi TAKEDA , Kaori DOI , Ryota WAKASUGI
CPC classification number: H01T15/00 , F02P3/02 , F02P3/04 , F02P13/00 , F02P15/00 , H01F38/12 , H01T13/04 , H01T13/08 , H01T13/20 , H01T13/32 , H01T13/38 , H01T13/42
Abstract: An ignition apparatus includes a spark plug and an ignition coil. The spark plug has a plug terminal protruding proximalward from an insulator. The ignition coil includes a coil main body, which includes a primary coil and a secondary coil, and a helical spring that electrically connects the secondary coil and the plug terminal. The plug terminal is made of a material that is both electrically conductive and magnetic. The plug terminal includes a terminal main body, which has an outer diameter greater than an inner diameter of the spring, and a terminal extension portion that has an outer diameter less than the inner diameter of the spring and extends proximalward from the terminal main body. A distal end portion of the spring abuts the terminal main body. The terminal extension portion is inserted and arranged in the spring. Between an outer circumferential surface of the terminal extension portion and an inner circumferential surface of the spring, there is interposed an insulating member.
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公开(公告)号：US20170022960A1
公开(公告)日：2017-01-26
申请号：US15302544
申请日：2015-04-09
Applicant: DENSO CORPORATION
Inventor： Shunichi TAKEDA , Mitsunobu NIWA , Hisaharu MORITA
IPC: F02P3/05
CPC classification number: F02P3/05 , F02P3/0442 , F02P3/0846 , F02P3/0876 , F02P5/15 , F02P9/007 , F02P17/12 , Y02T10/46
Abstract: An ignition device includes a secondary current control circuit that receives a secondary current control signal IGa from an ECU, and a feedback circuit outputs a control signal for controlling energization of an primary coil to an energy supply circuit according to a result of comparison of a control value of the secondary current outputted from the secondary current control circuit and a detected value of the secondary current. Further, the ECU outputs a secondary current control signal IGa in accordance with engine parameters. Thereby, the secondary current substantially indicating the amount of energy that is supplied into the ignition coil from the energy supply circuit can be controlled in accordance with the operating condition of the engine. Therefore, it is possible to suppress excess or shortage of energy supplied from the energy supply circuit to an ignition coil from occurring.
Abstract translation: 点火装置包括从ECU接收二次电流控制信号IGa的二次电流控制电路，并且反馈电路根据控制的比较结果输出用于控制初级线圈向能量供给电路的通电的控制信号 从次级电流控制电路输出的次级电流的值和次级电流的检测值。 此外，ECU根据发动机参数输出次级电流控制信号IGa。 由此，可以根据发动机的运转状况来控制从能量供给回路供给到点火线圈的能量的量的二次电流。 因此，可以抑制从能量供给回路向点火线圈供给的能量的过剩或不足。
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公开(公告)号：US20160061177A1
公开(公告)日：2016-03-03
申请号：US14783901
申请日：2014-04-11
Applicant: DENSO CORPORATION
Inventor： Masahiro ISHITANI , Akimitsu SUGIURA , Makoto TORIYAMA , Satoru NAKAYAMA , Yuuki KONDOU , Hisaharu MORITA , Naoto HAYASHI , Yuuto TAMEI , Takashi OONO , Shunichi TAKEDA
CPC classification number: F02P3/0435 , F02P11/06 , F02P15/10
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 fist 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.
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