Patents by Inventor Yusuke Naruse
Yusuke Naruse 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: 11417459Abstract: Provided is an ignition system including: a main primary coil; a main IC configured to switch a main primary coil mode between an energization mode and a de-energization mode; a sub primary coil; a sub IC configured to switch a sub primary coil mode between an energization mode and a de-energization mode; a secondary coil; a detection unit configured to detect a state of the main primary coil; and a control unit configured to determine whether a state of a sub primary current path is normal or abnormal based on the state of the main primary coil detected by the detection unit, the sub primary current path being a current path of a sub primary current flowing through the sub primary coil.Type: GrantFiled: December 14, 2018Date of Patent: August 16, 2022Assignee: Mitsubishi Electric CorporationInventor: Yusuke Naruse
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Patent number: 11393622Abstract: There is provided an ignition apparatus that makes it possible that after a spark discharge starts, a secondary current is reduced so that a plug is suppressed from being consumed. The ignition apparatus is provided with an ignition coil including a primary coil, a secondary coil, and a tertiary coil, a first switching circuit for performing on/off-switching of energization of the primary coil from a power source, a second switching circuit for performing on/off-switching of energization of the tertiary coil, and a controller that performs on/off-control of the first switching circuit so as to generate a secondary current in the secondary coil, thereby causing a spark discharge in an ignition plug, and then turns on the second switching circuit so as to reduce the secondary current through a change in flux in the tertiary coil.Type: GrantFiled: June 29, 2020Date of Patent: July 19, 2022Assignee: Mitsubishi Electric CorporationInventors: Yuichi Muramoto, Kimihiko Tanaya, Naoki Kataoka, Yusuke Naruse
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Publication number: 20220028605Abstract: Provided is an ignition system including: a main primary coil; a main IC configured to switch a main primary coil mode between an energization mode and a de-energization mode; a sub primary coil; a sub IC configured to switch a sub primary coil mode between an energization mode and a de-energization mode; a secondary coil; a detection unit configured to detect a state of the main primary coil; and a control unit configured to determine whether a state of a sub primary current path is normal or abnormal based on the state of the main primary coil detected by the detection unit, the sub primary current path being a current path of a sub primary current flowing through the sub primary coil.Type: ApplicationFiled: December 14, 2018Publication date: January 27, 2022Applicant: Mitsubishi Electric CorporationInventor: Yusuke NARUSE
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Patent number: 10992113Abstract: To provide an ignition apparatus which can turn on and off the sub primary coil according to extension degree of the discharge path of the spark discharge. An ignition apparatus is provided with an ignition coil that is provided with a main primary coil, a sub primary coil which generates energization magnetic flux of a direction opposite to the energization magnetic flux of the main primary coil, and a secondary coil which is magnetically coupled with the main primary coil and the sub primary coil and supplies spark discharge energy to a spark plug; and after turning off energization to the main primary coil, based on a detection value of terminal voltage of the main primary coil, turns on and off the sub switch circuit to turn on and off energization to the sub primary coil and additionally supply spark discharge energy to the secondary coil.Type: GrantFiled: February 27, 2020Date of Patent: April 27, 2021Assignee: Mitsubishi Electric CorporationInventors: Yuichi Muramoto, Yusuke Naruse, Naoki Kataoka
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Publication number: 20210082618Abstract: There is provided an ignition apparatus that makes it possible that after a spark discharge starts, a secondary current is reduced so that a plug is suppressed from being consumed. The ignition apparatus is provided with an ignition coil including a primary coil, a secondary coil, and a tertiary coil, a first switching circuit for performing on/off-switching of energization of the primary coil from a power source, a second switching circuit for performing on/off-switching of energization of the tertiary coil, and a controller that performs on/off-control of the first switching circuit so as to generate a secondary current in the secondary coil, thereby causing a spark discharge in an ignition plug, and then turns on the second switching circuit so as to reduce the secondary current through a change in flux in the tertiary coil.Type: ApplicationFiled: June 29, 2020Publication date: March 18, 2021Applicant: Mitsubishi Electric CorporationInventors: Yuichi MURAMOTO, Kimihiko TANAYA, Naoki KATAOKA, Yusuke NARUSE
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Publication number: 20200358263Abstract: To provide an ignition apparatus which can turn on and off the sub primary coil according to extension degree of the discharge path of the spark discharge. An ignition apparatus is provided with an ignition coil that is provided with a main primary coil, a sub primary coil which generates energization magnetic flux of a direction opposite to the energization magnetic flux of the main primary coil, and a secondary coil which is magnetically coupled with the main primary coil and the sub primary coil and supplies spark discharge energy to a spark plug; and after turning off energization to the main primary coil, based on a detection value of terminal voltage of the main primary coil, turns on and off the sub switch circuit to turn on and off energization to the sub primary coil and additionally supply spark discharge energy to the secondary coil.Type: ApplicationFiled: February 27, 2020Publication date: November 12, 2020Applicant: Mitsubishi Electric CorporationInventors: Yuichi MURAMOTO, Yusuke NARUSE, Naoki KATAOKA
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Patent number: 10630205Abstract: A resonant inverter includes: an input capacitor; an inverter; a snubber circuit; a transformer having a primary winding connected to an AC end of the inverter; a resonant coil, a resonant capacitor, and a current sensor on the secondary winding side of the transformer; and a control unit, wherein, on the basis of current detected by the current sensor, the control unit controls switching elements so as to perform zero voltage switching at the time of turning-on, at a frequency at which a load including the resonant coil and the resonant capacitor becomes capacitive, and performs power regeneration of energy stored in a snubber capacitor to a DC voltage source.Type: GrantFiled: February 28, 2017Date of Patent: April 21, 2020Assignee: Mitsubishi Electric CorporationInventors: Satoshi Murakami, Ryosuke Kobayashi, Akira Nakagawa, Kimihiko Tanaya, Yusuke Naruse, Yuichi Muramoto
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Publication number: 20190199241Abstract: A resonant inverter includes: an input capacitor; an inverter; a snubber circuit; a transformer having a primary winding connected to an AC end of the inverter; a resonant coil, a resonant capacitor, and a current sensor on the secondary winding side of the transformer; and a control unit, wherein, on the basis of current detected by the current sensor, the control unit controls switching elements so as to perform zero voltage switching at the time of turning-on, at a frequency at which a load including the resonant coil and the resonant capacitor becomes capacitive, and performs power regeneration of energy stored in a snubber capacitor to a DC voltage source.Type: ApplicationFiled: February 28, 2017Publication date: June 27, 2019Applicant: Mitsubishi Electric CorporationInventors: Satoshi MURAKAMI, Ryosuke KOBAYASHI, Akira NAKAGAWA, Kimihiko TANAYA, Yusuke NARUSE, Yuichi MURAMOTO
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Patent number: 10193312Abstract: In order to transmit high frequency energy to a coupling circuit, if the high frequency energy is transmitted via a harness provided with a high-voltage cable, the loop in which the high frequency energy is conducted is long, and thus, noise occurring from the loop is increased. Thus, shielding is needed to be provided to the entire apparatus. The present invention has a structure in which: a high frequency energy supply circuit and a coupling circuit are connected by a connection member; and a housing having therein the high frequency energy supply circuit is integrated with a housing having therein the coupling circuit. Accordingly, the entire apparatus can be downsized and noise occurring from the loop can be reduced.Type: GrantFiled: August 25, 2016Date of Patent: January 29, 2019Assignee: Mitsubishi Electric CorporationInventors: Yasuyuki Shimizu, Takaaki Tanaka, Yusuke Naruse
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Publication number: 20170294764Abstract: In order to transmit high frequency energy to a coupling circuit, if the high frequency energy is transmitted via a harness provided with a high-voltage cable, the loop in which the high frequency energy is conducted is long, and thus, noise occurring from the loop is increased. Thus, shielding is needed to be provided to the entire apparatus. The present invention has a structure in which: a high frequency energy supply circuit and a coupling circuit are connected by a connection member; and a housing having therein the high frequency energy supply circuit is integrated with a housing having therein the coupling circuit. Accordingly, the entire apparatus can be downsized and noise occurring from the loop can be reduced.Type: ApplicationFiled: August 25, 2016Publication date: October 12, 2017Applicant: Mitsubishi Electric CorporationInventors: Yasuyuki SHIMIZU, Takaaki TANAKA, Yusuke NARUSE
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Patent number: 9212645Abstract: There is provided an internal combustion engine ignition device which comprises a switching element for causing or interrupting flow of a current through a primary coil of an ignition coil; a secondary current detection circuit connected to a secondary coil for detecting a secondary current flowing at the time of ignition; an ion current detection circuit for detecting an ion current generated after the ignition; and an energy consumption circuit which is activated based on an output signal from the secondary current detection circuit that is output when the secondary current exceeds a predetermined threshold value, to constitute a circuit for discharging energy stored in the ignition coil.Type: GrantFiled: March 4, 2014Date of Patent: December 15, 2015Assignee: Mitsubishi Electric CorporationInventors: Yusuke Naruse, Kimihiko Tanaya, Takeshi Shimizu
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Publication number: 20150116890Abstract: There is provided an internal combustion engine ignition device which comprises a switching element for causing or interrupting flow of a current through a primary coil of an ignition coil; a secondary current detection circuit connected to a secondary coil for detecting a secondary current flowing at the time of ignition; an ion current detection circuit for detecting an ion current generated after the ignition; and an energy consumption circuit which is activated based on an output signal from the secondary current detection circuit that is output when the secondary current exceeds a predetermined threshold value, to constitute a circuit for discharging energy stored in the ignition coil.Type: ApplicationFiled: March 4, 2014Publication date: April 30, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yusuke NARUSE, Kimihiko TANAYA, Takeshi SHIMIZU
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Patent number: 8387580Abstract: A plasma ignition device comprising: an ignition plug; an ignition circuit applying a high voltage to the plug to start discharge; a power supply circuit including a battery section for supplying an electric energy to a discharge space of the plug having impedance reduced by discharge start, and a charging section charging the battery section with a boosted voltage by a booster circuit, wherein the power supply circuit including: a first means 610 for stopping a boosting operation of the booster circuit when the charging section voltage is equal or higher than a first reference for high-voltage abnormality; a second means 630 for detecting the charging section abnormal voltage by comparison with a second reference for low-voltage abnormality for detecting ground to conduct a given control on the power supply circuit; a third means 600 for invalidating the control of the second means until the charging section is sufficiently charged.Type: GrantFiled: April 14, 2010Date of Patent: March 5, 2013Assignee: Mitsubishi Electric CorporationInventors: Futoshi Aida, Yusuke Naruse, Hiroshi Okuda
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Patent number: 8096276Abstract: A plasma power supply circuit includes a DC/DC converter connected to a DC power supply and outputting a DC voltage, a voltage limit circuit limiting an output voltage from the DC/DC converter to a predetermined value, a PJ capacitor connected to an output end of the DC/DC converter and charged with electric energy used to generate a plasma in a discharge space of the spark plug, and a high-voltage switch connected between the PJ capacitor and the DC/DC converter and controlled to switch ON and OFF so that a charge period of the PJ capacitor is controlled according to running conditions of the internal combustion engine. Hence, the plasma ignition device can prevent damage on an electronic component incorporated therein even at the occurrence of a short and lessen damage on the internal combustion engine caused by an erroneous plasma jet ejection, wearing of the spark plug, and power consumption.Type: GrantFiled: August 10, 2010Date of Patent: January 17, 2012Assignee: Mitsubishi Electronic CorporationInventors: Futoshi Aida, Hiroshi Okuda, Yuichi Muramoto, Yusuke Naruse
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Publication number: 20110253115Abstract: To provide a plasma ignition system that can prevent damage on an internal combustion engine due to erroneous ejection of a plasma jet, and further, even when the required voltage of an ignition plug becomes lower, can prevent erroneous ignition by the charged voltage of a PJ capacitor. A plasma power supply circuit of the plasma ignition system includes a voltage-limiting circuit having a first set voltage having an absolute value lower relative to the discharge voltage of the ignition coil, and a second set voltage having an absolute value higher relative to the discharge voltage of the ignition coil, and the first set voltage and the second set voltage are selectively switched according to an operation condition of the internal combustion engine.Type: ApplicationFiled: August 13, 2010Publication date: October 20, 2011Applicant: Mitsubishi Electric CorporationInventors: Futoshi AIDA, Hiroshi OKUDA, Yusuke NARUSE
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Publication number: 20110239998Abstract: A plasma power supply circuit includes a DC/DC converter connected to a DC power supply and outputting a DC voltage, a voltage limit circuit limiting an output voltage from the DC/DC converter to a predetermined value, a PJ capacitor connected to an output end of the DC/DC converter and charged with electric energy used to generate a plasma in a discharge space of the spark plug, and a high-voltage switch connected between the PJ capacitor and the DC/DC converter and controlled to switch ON and OFF so that a charge period of the PJ capacitor is controlled according to running conditions of the internal combustion engine. Hence, the plasma ignition device can prevent damage on an electronic component incorporated therein even at the occurrence of a short and lessen damage on the internal combustion engine caused by an erroneous plasma jet ejection, wearing of the spark plug, and power consumption.Type: ApplicationFiled: August 10, 2010Publication date: October 6, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Futoshi AIDA, Hiroshi OKUDA, Yuichi MURAMOTO, Yusuke NARUSE
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Patent number: 8025040Abstract: To provide a plasma ignition system that can prevent damage on an internal combustion engine due to erroneous ejection of a plasma jet, and further, even when the required voltage of an ignition plug becomes lower, can prevent erroneous ignition by the charged voltage of a PJ capacitor. A plasma power supply circuit of the plasma ignition system includes a voltage-limiting circuit having a first set voltage having an absolute value lower relative to the discharge voltage of the ignition coil, and a second set voltage having an absolute value higher relative to the discharge voltage of the ignition coil, and the first set voltage and the second set voltage are selectively switched according to an operation condition of the internal combustion engine.Type: GrantFiled: August 13, 2010Date of Patent: September 27, 2011Assignee: Mitsubishi Electric CorporationInventors: Futoshi Aida, Hiroshi Okuda, Yusuke Naruse
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Publication number: 20110106395Abstract: A plasma ignition device comprising: an ignition plug; an ignition circuit applying a high voltage to the plug to start discharge; a power supply circuit including a battery section for supplying an electric energy to a discharge space of the plug having impedance reduced by discharge start, and a charging section charging the battery section with a boosted voltage by a booster circuit, wherein the power supply circuit including: a first means 610 for stopping a boosting operation of the booster circuit when the charging section voltage is equal or higher than a first reference for high-voltage abnormality; a second means 630 for detecting the charging section abnormal voltage by comparison with a second reference for low-voltage abnormality for detecting ground to conduct a given control on the power supply circuit; a third means 600 for invalidating the control of the second means until the charging section is sufficiently charged.Type: ApplicationFiled: April 14, 2010Publication date: May 5, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Futoshi AIDA, Yusuke NARUSE, Hiroshi OKUDA
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Publication number: 20100147274Abstract: There is obtained an ignition apparatus, for an internal combustion engine, that can make a predetermined output current flow in a stable manner so that the combustion state of the internal combustion engine can always be maintained in a good condition, even in the case where the voltage of the power source connected with the energy storing coil fluctuates.Type: ApplicationFiled: October 1, 2009Publication date: June 17, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Takayoshi NAGAI, Hirohisa Kuwano, Ikuro Suga, Yusuke Naruse
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Patent number: 7730880Abstract: There is obtained an ignition apparatus, for an internal combustion engine, that can make a predetermined output current flow in a stable manner so that the combustion state of the internal combustion engine can always be maintained in a good condition, even in the case where the voltage of the power source connected with the energy storing coil fluctuates.Type: GrantFiled: October 1, 2009Date of Patent: June 8, 2010Assignee: Mitsubishi Electric CorporationInventors: Takayoshi Nagai, Hirohisa Kuwano, Ikuro Suga, Yusuke Naruse