Patents by Inventor Hisaharu Morita
Hisaharu Morita 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).
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Patent number: 10704522Abstract: 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.Type: GrantFiled: April 17, 2019Date of Patent: July 7, 2020Assignee: DENSO CORPORATIONInventors: Shunichi Takeda, Mitsunobu Niwa, Hisaharu Morita
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Publication number: 20190242353Abstract: 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.Type: ApplicationFiled: April 17, 2019Publication date: August 8, 2019Inventors: Shunichi TAKEDA, Mitsunobu NIWA, Hisaharu MORITA
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Patent number: 10309365Abstract: 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.Type: GrantFiled: April 9, 2015Date of Patent: June 4, 2019Assignee: DENSO CORPORATIONInventors: Shunichi Takeda, Mitsunobu Niwa, Hisaharu Morita
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Patent number: 10302062Abstract: 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: GrantFiled: August 18, 2017Date of Patent: May 28, 2019Assignee: DENSO CORPORATIONInventors: Masahiro Ishitani, Akimitsu Sugiura, Makoto Toriyama, Satoru Nakayama, Yuuki Kondou, Hisaharu Morita, Naoto Hayashi, Yuuto Tamei, Takashi Oono, Shunichi Takeda
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Patent number: 10082125Abstract: 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.Type: GrantFiled: April 9, 2015Date of Patent: September 25, 2018Assignee: DENSO CORPORATIONInventors: Hidekazu Fujimoto, Makoto Toriyama, Satoru Nakayama, Yasuomi Imanaka, Kanechiyo Terada, Shunichi Takeda, Kaori Doi, Junichi Wada, Hisaharu Morita, Naohisa Nakamura
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Patent number: 9932954Abstract: 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.Type: GrantFiled: April 3, 2015Date of Patent: April 3, 2018Assignee: DENSO CORPORATIONInventors: Naohisa Nakamura, Hisaharu Morita, Kouji Andoh, Shunichi Takeda
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Publication number: 20170342955Abstract: 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: ApplicationFiled: August 18, 2017Publication date: November 30, 2017Inventors: Masahiro ISHITANI, Akimitsu SUGIURA, Makoto TORIYAMA, Satoru NAKAYAMA, Yuuki KONDOU, Hisaharu MORITA, Naoto HAYASHI, Yuuto TAMEI, Takashi OONO, Shunichi TAKEDA
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Patent number: 9765748Abstract: 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: GrantFiled: April 11, 2014Date of Patent: September 19, 2017Assignee: DENSO CORPORATIONInventors: Masahiro Ishitani, Akimitsu Sugiura, Makoto Toriyama, Satoru Nakayama, Yuuki Kondou, Hisaharu Morita, Naoto Hayashi, Yuuto Tamei, Takashi Oono, Shunichi Takeda
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Publication number: 20170159634Abstract: 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.Type: ApplicationFiled: April 9, 2015Publication date: June 8, 2017Applicant: DENSO CORPORATIONInventors: Hidekazu FUJIMOTO, Makoto TORIYAMA, Satoru NAKAYAMA, Yasuomi IMANAKA, Kanechiyo TERADA, Shunichi TAKEDA, Kaori DOI, Junichi WADA, Hisaharu MORITA, Naohisa NAKAMURA
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Publication number: 20170030318Abstract: 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.Type: ApplicationFiled: April 3, 2015Publication date: February 2, 2017Inventors: Naohisa NAKAMURA, Hisaharu MORITA, Kouji ANDOH, Shunichi TAKEDA
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Publication number: 20170022960Abstract: 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.Type: ApplicationFiled: April 9, 2015Publication date: January 26, 2017Inventors: Shunichi TAKEDA, Mitsunobu NIWA, Hisaharu MORITA
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Publication number: 20160061177Abstract: 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: ApplicationFiled: April 11, 2014Publication date: March 3, 2016Inventors: Masahiro ISHITANI, Akimitsu SUGIURA, Makoto TORIYAMA, Satoru NAKAYAMA, Yuuki KONDOU, Hisaharu MORITA, Naoto HAYASHI, Yuuto TAMEI, Takashi OONO, Shunichi TAKEDA
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Publication number: 20090179026Abstract: The present invention provides, as one aspect, an apparatus for detecting deterioration of a heater. The apparatus includes a power source, a first voltage outputting unit that converts a current flowing into the heater to a voltage and outputs a first voltage value, a second voltage outputting unit that is connected to the power source and outputs a second voltage value corresponding to a voltage of the power source, and a comparison unit that compares the first voltage value with the second voltage value to determine whether the heater is deteriorated or not.Type: ApplicationFiled: January 14, 2009Publication date: July 16, 2009Applicant: DENSO CORPORATIONInventors: Hisaharu Morita, Hironao Yamaguchi
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Publication number: 20080047268Abstract: A controller controls an electrically assisted turbocharger including a turbocharger body and an assist electric motor for assisting the turbocharger body in driving. The controller controls the operation of the assist electric motor. The controller compares a target power value of the assist electric motor with an actual power value actually supplied to the assist electric motor, and computes the differential between them. The controller compensates a torque error of the assist electric motor due to the differential (updating a correction coefficient) based on the differential.Type: ApplicationFiled: August 14, 2007Publication date: February 28, 2008Applicant: DENSO CORPORATIONInventors: Nobumasa Isogai, Yuuji Ishiwatari, Hisaharu Morita
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Patent number: 7084600Abstract: A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the inverter, a converter boosting a voltage supplied to the inverter, a converter voltage controlling section controlling an output voltage of the converter, and a control signal generating section that controls the inverter voltage controlling section in a low-rotational speed region and controls the converter voltage controlling section in a high-rotational speed region.Type: GrantFiled: July 21, 2004Date of Patent: August 1, 2006Assignee: Denso CorporationInventors: Tamaki Suzuki, Masami Fujitsuna, Hisaharu Morita
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Publication number: 20050017672Abstract: A power control apparatus includes an inverter giving a rectangular waveform drive signal to an induction motor, an inverter voltage controlling section controlling an output voltage of the inverter, a converter boosting a voltage supplied to the inverter, a converter voltage controlling section controlling an output voltage of the converter, and a control signal generating section that controls the inverter voltage controlling section in a low-rotational speed region and controls the converter voltage controlling section in a high-rotational speed region.Type: ApplicationFiled: July 21, 2004Publication date: January 27, 2005Applicant: DENSO CORPORATIONInventors: Tamaki Suzuki, Masami Fujitsuna, Hisaharu Morita