Patents by Inventor Yuuto TAMEI

Yuuto TAMEI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10619616
    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.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: April 14, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Oono, Shunichi Takeda, Kanechiyo Terada, Yuuto Tamei
  • Patent number: 10302062
    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.
    Type: Grant
    Filed: August 18, 2017
    Date of Patent: May 28, 2019
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Ishitani, Akimitsu Sugiura, Makoto Toriyama, Satoru Nakayama, Yuuki Kondou, Hisaharu Morita, Naoto Hayashi, Yuuto Tamei, Takashi Oono, Shunichi Takeda
  • Publication number: 20170342955
    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.
    Type: Application
    Filed: August 18, 2017
    Publication date: November 30, 2017
    Inventors: Masahiro ISHITANI, Akimitsu SUGIURA, Makoto TORIYAMA, Satoru NAKAYAMA, Yuuki KONDOU, Hisaharu MORITA, Naoto HAYASHI, Yuuto TAMEI, Takashi OONO, Shunichi TAKEDA
  • Patent number: 9765748
    Abstract: An ignition control device comprises: a first switching element having a power source side terminal connected to an other end side of a primary coil and a first ground side terminal connected to a ground side; a second switching element having a second ground side terminal connected to the other end side of the primary coil; a third switching element having a third power source side terminal connected to the second power source side terminal in the second switching element, and a third ground side terminal connected to the ground side; and an energy storage coil. The energy storage coil is an inductor interposed in an electric power line connecting a non-ground side output terminal in a DC power source and the third power source side terminal in the third switching element, and stores energy from the turning on of the third switching element.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: September 19, 2017
    Assignee: DENSO CORPORATION
    Inventors: Masahiro Ishitani, Akimitsu Sugiura, Makoto Toriyama, Satoru Nakayama, Yuuki Kondou, Hisaharu Morita, Naoto Hayashi, Yuuto Tamei, Takashi Oono, Shunichi Takeda
  • Patent number: 9660424
    Abstract: A spark plug 1 has a center electrode 4 and a ground electrode 5 opposed to each other and causes a spark discharge to occur through application of a voltage between the center electrode 4 and the ground electrode 5 . Moreover, the center electrode 4 has a columnar main chip 10 provided at a distal end thereof by welding via a fusion portion 12 and an annular auxiliary chip 11 surrounding the fusion portion 12. Consequently, when a spark discharge occurring from the center electrode 4 is blown to the downstream side by the influence of a gas flow in a cylinder of an internal combustion engine, it is possible to suppress a cathode point from being formed in the fusion portion 12 since the fusion portion 12 is surrounded and thus protected by the auxiliary chip 11. As a result, it is possible to suppress wear of the center electrode 4, thereby extending the service life of the spark plug 1.
    Type: Grant
    Filed: April 1, 2015
    Date of Patent: May 23, 2017
    Assignee: DENSO CORPORATION
    Inventors: Kaori Doi, Masamichi Shibata, Yuuto Tamei
  • Publication number: 20170114767
    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.
    Type: Application
    Filed: April 10, 2015
    Publication date: April 27, 2017
    Inventors: Takashi OONO, Shunichi TAKEDA, Kanechiyo TERADA, Yuuto TAMEI
  • Publication number: 20170025821
    Abstract: A spark plug 1 has a center electrode 4 and a ground electrode 5 opposed to each other and causes a spark discharge to occur through application of a voltage between the center electrode 4 and the ground electrode 5. Moreover, the center electrode 4 has a columnar main chip 10 provided at a distal end thereof by welding via a fusion portion 12 and an annular auxiliary chip 11 surrounding the fusion portion 12. Consequently, when a spark discharge occurring from the center electrode 4 is blown to the downstream side by the influence of a gas flow in a cylinder of an internal combustion engine, it is possible to suppress a cathode point from being formed in the fusion portion 12 since the fusion portion 12 is surrounded and thus protected by the auxiliary chip 11. As a result, it is possible to suppress wear of the center electrode 4, thereby extending the service life of the spark plug 1.
    Type: Application
    Filed: April 1, 2015
    Publication date: January 26, 2017
    Inventors: Kaori DOI, Masamichi SHIBATA, Yuuto TAMEI
  • Publication number: 20160061177
    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.
    Type: Application
    Filed: April 11, 2014
    Publication date: March 3, 2016
    Inventors: Masahiro ISHITANI, Akimitsu SUGIURA, Makoto TORIYAMA, Satoru NAKAYAMA, Yuuki KONDOU, Hisaharu MORITA, Naoto HAYASHI, Yuuto TAMEI, Takashi OONO, Shunichi TAKEDA