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公开(公告)号：US20170342955A1
公开(公告)日：2017-11-30
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
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 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.
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公开(公告)号：US20170159634A1
公开(公告)日：2017-06-08
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
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
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.
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公开(公告)号：US20170114767A1
公开(公告)日：2017-04-27
申请号：US15301795
申请日：2015-04-10
Applicant: DENSO CORPORATION
Inventor： Takashi OONO , Shunichi TAKEDA , Kanechiyo TERADA , Yuuto TAMEI
CPC classification number: F02P3/0807 , F02P3/04 , F02P3/0876 , F02P3/0892 , F02P9/007 , F02P11/00 , F02P15/10
Abstract: A maximum value of a discharge current from a capacitor 13, detected by a primary-side current detection means 24 disposed at a grounded end of the capacitor 13, is controlled such as not to exceed a predetermined first control value Y1. The first control value Y1 is derived based on magnetic saturation of a primary winding 3, with the control being performed by controlling the on-off state of an energy injection switching means 20. As a result, magnetic saturation of the primary winding 3 can be prevented, and the reliability of an ignition apparatus which incorporates an energy injection circuit 6 can be increased.
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公开(公告)号：US20180266381A1
公开(公告)日：2018-09-20
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
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.
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公开(公告)号：US20180013266A1
公开(公告)日：2018-01-11
申请号：US15645155
申请日：2017-07-10
Applicant: DENSO CORPORATION
Inventor： Fujiyuki IWAMOTO , Shunichi TAKEDA
Abstract: An ignition device capable of more reliably protecting a primary winding of an ignition coil from high temperature is provided. The ignition device includes an ignition coil, a switching element, a temperature sensor, and a thermal cutout circuit. A primary winding of the ignition coil is connected to a DC power supply and the switching element. The temperature sensor is provided to measure the temperature of the switching element. The thermal cutout circuit forcibly turns off the switching element when the temperature of the switching element becomes higher than a predetermined forcible turn-off temperature Toff. The thermal cutout circuit is configured to lower the forcible turn-off temperature Toff when the power supply voltage Vb of the DC power supply decreases.
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Patent Agency Ranking
公开(公告)号：US20170284356A1
公开(公告)日：2017-10-05
申请号：US15508222
申请日：2015-08-26
Applicant: DENSO CORPORATION
Inventor： Shunichi TAKEDA , Satoru NAKAYAMA , Kanechiyo TERADA
CPC classification number: F02P3/05 , F02P3/0442 , F02P3/0838 , F02P3/0846 , F02P3/096 , F02P5/1502 , F02P9/002 , F02P9/007 , F02P15/00 , F02P15/10 , F02P17/00 , H01F38/12 , H01F2038/122 , Y02T10/46
Abstract: An ignition apparatus for an internal combustion engine includes: a spark plug; a first ignition coil and a second ignition coil; a battery; a booster circuit that boosts a voltage supplied from the battery; a power transistor that conducts and interrupts a primary current flowing to a primary coil included in the first ignition coil; a MOSFET that applies and interrupts the voltage boosted by the booster circuit to a primary coil included in the second ignition coil; and an ECU that starts electric discharge by the spark plug by controlling the power transistor, and repeatedly applies and interrupts the voltage boosted by the booster circuit by the MOSFET so that the electric discharge that is started is maintained.
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公开(公告)号：US20180358782A1
公开(公告)日：2018-12-13
申请号：US15997993
申请日：2018-06-05
Applicant: DENSO CORPORATION
Inventor： Keiko MIYAKE , Takashi OHNO , Shunichi TAKEDA , Kanechiyo TERADA
CPC classification number: H01T13/04 , F02P3/01 , F02P3/0442 , F02P3/053 , F02P7/077 , F02P9/007 , F02P15/10 , F02P2017/121
Abstract: An ignition device for generating a spark discharge at a spark plug based on a first voltage from a first supply and a second voltage from a second supply. The second voltage is higher than the first voltage. In the ignition device, a primary coil includes a center tap, a first terminal on a ground side of the center tap, and a second terminal on a first-supply side of the center tap, and a secondary coil is electromagnetically coupled to the primary coil and electrically connected to the spark plug. A first switch is configured to make or break an electrical connection between the first terminal and ground, a second switch is configured to make or break an electrical connection between the second supply and the center tap, and a third switch is configured to pass or interrupt a current from the second terminal to the first supply. A controller is configured to control an on/off state of each of the first to third switches.
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公开(公告)号：US20180320652A1
公开(公告)日：2018-11-08
申请号：US15773284
申请日：2016-10-07
Applicant: DENSO CORPORATION
Inventor： Motoo YAMAGUCHI , Fujiyuki IWAMOTO , Shunichi TAKEDA
CPC classification number: F02P3/055 , F02P3/04 , F02P3/053 , F02P15/00 , H01L21/822 , H01L23/48 , H01L23/49548 , H01L23/49562 , H01L23/49575 , H01L23/49589 , H01L23/50 , H01L23/62 , H01L24/42 , H01L25/072 , H01L25/18 , H01L27/04 , H01L27/0629 , H01L29/866 , H01L2224/48137 , H01L2224/48195 , H01L2224/48247 , H01L2224/49111 , H01L2224/4917 , H01L2924/00014 , H01L2924/13055 , H01L2924/19105 , H01L2924/00 , H01L2224/45099
Abstract: An igniter includes a switching element, a control circuit section, and a protection element. The switching element is connected to a primary winding of an ignition coil. The control circuit section is configured to control operation of the switching element. The protection element is configured to electrically protect the control circuit section. The switching element and the protection element are formed in the same semiconductor chip, and are mounted on the same lead frame.
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公开(公告)号：US20180283344A1
公开(公告)日：2018-10-04
申请号：US15573922
申请日：2016-05-09
Applicant: DENSO CORPORATION
Inventor： Shun SUGITA , Shunichi TAKEDA
CPC classification number: F02P5/1502 , F02D41/1454 , F02D2200/0406 , F02D2200/101 , F02P3/04 , F02P3/0442 , F02P3/0892 , F02P5/045 , F02P5/1504 , F02P9/002 , F02P9/007 , F02P15/10 , Y02T10/46 , F02P3/02 , F02P3/0876
Abstract: An ignition apparatus for an internal combustion engine is provided. The ignition apparatus includes an ECU. The ECU calculates a target value E* of an energy input amount of energy inputted into a spark plug based on an in-cylinder flow velocity v, a cylinder pressure P, and an air-fuel ratio AFR. The ECU also calculates a command value I* of a secondary current based on the in-cylinder flow velocity and control an operation of a second circuit according to the target value E* and the command value I*. The calculation of the target value E* using the in-cylinder flow velocity v, the cylinder pressure P, and the air fuel ratio AFR enables the energy input amount to be controlled according to the operating state of the internal combustion engine. The calculation of the command value I* based on the in-cylinder flow velocity v enables the secondary current to be controlled so as to eliminate a risk of the blowout of sparks. The ignition apparatus is, thus, capable of variably changing the amount of energy inputted to the spark plug to improve the fuel consumption.
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公开(公告)号：US20170030318A1
公开(公告)日：2017-02-02
申请号：US15302536
申请日：2015-04-03
Applicant: DENSO CORPORATION
Inventor： Naohisa NAKAMURA , Hisaharu MORITA , Kouji ANDOH , Shunichi TAKEDA
CPC classification number: F02P3/04 , F02P3/0892 , F02P5/00 , F02P5/1502 , F02P9/002 , F02P9/007 , F02P15/10
Abstract: An ignition device for engine according to the present invention performs continuous spark discharge of an ignition plug by using a multiplex signal, an integration signal or a control signal. In the multiplex signal, discharge continuous signals IGW#1 to 4 for cylinders of the engine have been multiplexed. In the integration signal, a discharge continuous signal IGW and a secondary current instruction signal IGA have been added to an ignition signal IGT. In the control signal, the secondary current instruction signal IGA has been added into the multiplex signal or the integration signal. This structure can reduce the total number of signal lines connected between an ECU and a controller, and further reduce a signal line to transmit the secondary current instruction signal IGA.
Abstract translation: 根据本发明的用于发动机的点火装置通过使用多路复用信号，积分信号或控制信号来执行火花塞的连续火花放电。 在多路复用信号中，用于发动机气缸的放电连续信号IGW＃1〜4已被复用。 在积分信号中，放电连续信号IGW和二次电流指令信号IGA已被加到点火信号IGT。 在控制信号中，二次电流指令信号IGA已经被加到多路复用信号或积分信号中。 这种结构可以减少连接在ECU和控制器之间的信号线的总数，并进一步减少信号线以传送二次电流指令信号IGA。
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