Patents by Inventor Hiromitsu Seo
Hiromitsu Seo 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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Publication number: 20240172465Abstract: A light-emitting device with high emission efficiency, reliability, and color purity is to be provided. The light-emitting device includes a first electrode, a second electrode, and an organic compound layer. The organic compound layer is between the first electrode and the second electrode and includes a light-emitting layer. The light-emitting layer includes a first substance and a second substance. The second substance causes light emission from a doublet excited state. The doublet excited level of the second substance is lower than the singlet excited level of the first substance and is higher than the triplet excited level of the first substance. The second substance emits light.Type: ApplicationFiled: October 20, 2023Publication date: May 23, 2024Inventors: Nobuharu OHSAWA, Hiromitsu KIDO, Satoshi SEO, Hideko YOSHIZUMI
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Publication number: 20240172460Abstract: A light-emitting device with favorable carrier balance is provided. The light-emitting device includes a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes at least a first substance and a light-emitting substance, the first substance includes an organic compound having one or more of a carbazole ring, an aromatic amine skeleton, and a ?-electron deficient heteroaromatic ring, a luminescence lifetime of delayed fluorescence caused by photoexcitation of the light-emitting substance is shorter at a first temperature than at a second temperature, the first temperature is lower than the second temperature, and the first temperature and the second temperature are each higher than or equal to 10 K and lower than or equal to 300 K.Type: ApplicationFiled: October 27, 2023Publication date: May 23, 2024Inventors: Harue OSAKA, Satoshi SEO, Nobuharu OHSAWA, Kazuki KAJIYAMA, Hiromitsu KIDO
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Publication number: 20240172461Abstract: A highly efficient light-emitting device is provided. The light-emitting device includes a light-emitting layer between a first electrode and a second electrode. The light-emitting layer includes at least a light-emitting substance and a first substance, the half width of an emission spectrum of the light-emitting substance is 0.35 eV or less, the luminescence lifetime of delayed fluorescence caused by photoexcitation of the first substance is shorter at a first temperature than at a second temperature, the first temperature is lower than the second temperature, and the first temperature and the second temperature are each higher than or equal to 10 K and lower than or equal to 300 K.Type: ApplicationFiled: October 27, 2023Publication date: May 23, 2024Inventors: Harue OSAKA, Satoshi SEO, Nobuharu OHSAWA, Kazuki KAJIYAMA, Hiromitsu KIDO
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Patent number: 11313314Abstract: A control apparatus of an internal combustion engine is provided. The internal combustion engine includes a port injection valve that injects fuel into an intake-air port, and a cylinder injection valve that injects fuel into a cylinder. The control apparatus includes an electronic control unit that controls the port injection valve and the cylinder injection valve such that when returning from a fuel cut, a value of a port increase amount correction, which is a fuel increase amount correction in which a fuel amount is decreased with a lapse of time during a port injection, differs from a value of a cylinder increase amount correction, which is a fuel increase amount correction in which a fuel amount is decreased with a lapse of time during a cylinder injection.Type: GrantFiled: June 28, 2021Date of Patent: April 26, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromitsu Seo, Masatomo Yoshihara, Masanao Idogawa, Takahiro Uchida, Motohiro Sugimoto
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Publication number: 20210404409Abstract: A control apparatus of an internal combustion engine is provided. The internal combustion engine includes a port injection valve that injects fuel into an intake-air port, and a cylinder injection valve that injects fuel into a cylinder. The control apparatus includes an electronic control unit that controls the port injection valve and the cylinder injection valve such that when returning from a fuel cut, a value of a port increase amount correction, which is a fuel increase amount correction in which a fuel amount is decreased with a lapse of time during a port injection, differs from a value of a cylinder increase amount correction, which is a fuel increase amount correction in which a fuel amount is decreased with a lapse of time during a cylinder injection.Type: ApplicationFiled: June 28, 2021Publication date: December 30, 2021Inventors: Hiromitsu SEO, Masatomo YOSHIHARA, Masanao IDOGAWA, Takahiro UCHIDA, Motohiro SUGIMOTO
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Patent number: 10393053Abstract: A fuel injector for an internal combustion engine includes a fuel injection valve, a heater, and a controller. The fuel injection valve is configured to supply fuel to the internal combustion engine. The heater is configured to heat the fuel in the fuel injection valve. The controller is configured to: control the fuel injection valve to stop supplying the fuel to the internal combustion engine, control the heater to execute or stop heating the fuel in the fuel injection valve, and control the fuel injection valve to prohibit the stop of supplying the fuel during execution of the heating by the heater.Type: GrantFiled: May 21, 2014Date of Patent: August 27, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki Uchiyama, Hiromitsu Seo, Tomohiko Satomi, Takuya Takei, Masaya Murata
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Patent number: 9951732Abstract: An EFI-ECU determines an initial value of a correction value ekthwst for correcting an injection correction amount with reference to a non-heating initial value map if a heater is in operation, and determines the initial value of the correction value ekthwst for correcting the injection correction amount with reference to a heating initial value map if the heater is out of operation. It should be noted herein that the initial value of the correction value ekthwst is set lower under the same condition in the heating initial value map than in the non-heating initial value map.Type: GrantFiled: April 7, 2014Date of Patent: April 24, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromitsu Seo, Tomoyuki Uchiyama, Takuya Takei, Tomohiko Satomi
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Publication number: 20160115894Abstract: A fuel injector for an internal combustion engine includes a fuel injection valve, a heater, and a controller. The fuel injection valve is configured to supply fuel to the internal combustion engine. The heater is configured to heat the fuel in the fuel injection valve. The controller is configured to: control the fuel injection valve to stop supplying the fuel to the internal combustion engine, control the heater to execute or stop heating the fuel in the fuel injection valve, and control the fuel injection valve to prohibit the stop of supplying the fuel during execution of the heating by the heater.Type: ApplicationFiled: May 21, 2014Publication date: April 28, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki UCHIYAMA, Hiromitsu SEO, Tomohiko SATOMI, Takuya TAKEI, Masaya MURATA
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Publication number: 20160017851Abstract: An EFI-ECU determines an initial value of a correction value ekthwst for correcting an injection correction amount with reference to a non-heating initial value map if a heater is in operation, and determines the initial value of the correction value ekthwst for correcting the injection correction amount with reference to a heating initial value map if the heater is out of operation. It should be noted herein that the initial value of the correction value ekthwst is set lower under the same condition in the heating initial value map than in the non-heating initial value map.Type: ApplicationFiled: April 7, 2014Publication date: January 21, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromitsu SEO, Tomoyuki UCHIYAMA, Takuya TAKEI, Tomohiko SATOMI
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Patent number: 8515649Abstract: The present invention is directed to fuel injection devices for internal combustion engines. An object of the present invention is to provide a fuel injection device for an internal combustion engine capable of identifying a non-contributing fuel quantity when port injection and cylinder injection are simultaneously performed. If an explosion count and a coolant temperature for any cycle can be acquired, they can be applied to a first map and a second map to thereby find non-contributing fuel for 100% port injection and non-contributing fuel for 100% cylinder injection, respectively. Each of these found values of the non-contributing fuel is multiplied by a corresponding injection share ratio during injection of the non-contributing fuel to thereby find non-contributing fuel that takes into account the injection share ratio. Finally, these values are added up to arrive at a non-contributing fuel requirement value.Type: GrantFiled: May 25, 2010Date of Patent: August 20, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Noboru Takagi, Hiromitsu Seo, Eiichiro Kido, Takamitsu Mizutani, Hirokazu Ando
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Publication number: 20130096804Abstract: The present invention is directed to fuel injection devices for internal combustion engines. An object of the present invention is to provide a fuel injection device for an internal combustion engine capable of identifying a non-contributing fuel quantity when port injection and cylinder injection are simultaneously performed. If an explosion count and a coolant temperature for any cycle can be acquired, they can be applied to a first map and a second map to thereby find non-contributing fuel for 100% port injection and non-contributing fuel for 100% cylinder injection, respectively. Each of these found values of the non-contributing fuel is multiplied by a corresponding injection share ratio during injection of the non-contributing fuel to thereby find non-contributing fuel that takes into account the injection share ratio. Finally, these values are added up to arrive at a non-contributing fuel requirement value.Type: ApplicationFiled: May 25, 2010Publication date: April 18, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Noboru Takagi, Hiromitsu Seo, Eiichiro Kido, Takamitsu Mizutani, Hirokazu Ando
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Patent number: 6811101Abstract: In a fuel injection valve body for a direct injection type internal combustion engine, an entire nozzle body tip portion is formed in a conical shape protruding from a nozzle body outer peripheral surface covered with a cap. Therefore, neither a corner portion or a recessed portion is formed on a surface of the nozzle body tip portion. This prevents heat generated by combustion from concentrating at a corner portion or a surface area from enlarging by a recessed portion, which in turn prevents heat generated by combustion from increasing the temperature of the nozzle body tip portion. Moreover, since a foremost portion of a spherical shape is formed such that it does not form a corner portion or a recessed portion in a peripheral portion of a conical shape, heat generated by combustion does not increase the temperature of the nozzle body tip portion. The temperature of a nozzle hole can therefore be prevented from increasing and accumulation of deposits can be restricted.Type: GrantFiled: October 19, 2001Date of Patent: November 2, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hirohisa Kishi, Seiji Nonoyama, Kyosuke Ohashi, Takuya Ikoma, Hiromitsu Seo
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Patent number: 6745751Abstract: A fuel pump draws pumps fuel from a fuel tank to a pressurizing chamber during a suction stroke, and pressurizes and sends fuel in the pressurizing chamber to a delivery pipe. A electromagnetic valve is actuated by electricity from a battery to electively connects and disconnects the fuel tank with the pressurizing chamber. An ECU determines opening and closing timing of the electromagnetic valve based on the rotation al phase of an engine. When the rotational phase of the engine is not identified, the ECU executes a duty control to cyclically repeat supplying and stopping of current to the electromagnetic valve. The ECU extends a current supplying period in each cycle of the duty control as the voltage of the power supply is lowered. As a result, the electromagnetic valve is reliably closed particularly at each pressurizing stroke, which improves the pressure increasing efficiency of fuel supplied to a fuel injection system.Type: GrantFiled: June 6, 2003Date of Patent: June 8, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiromitsu Seo, Masanao Idogawa
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Publication number: 20040000289Abstract: A fuel pump draws pumps fuel from a fuel tank to a pressurizing chamber during a suction stroke, and pressurizes and sends fuel in the pressurizing chamber to a delivery pipe. A electromagnetic valve is actuated by electricity from a battery to electively connects and disconnects the fuel tank with the pressurizing chamber. An ECU determines opening and closing timing of the electromagnetic valve based on the rotation al phase of an engine. When the rotational phase of the engine is not identified, the ECU executes a duty control to cyclically repeat supplying and stopping of current to the electromagnetic valve. The ECU extends a current supplying period in each cycle of the duty control as the voltage of the power supply is lowered. As a result, the electromagnetic valve is reliably closed particularly at each pressurizing stroke, which improves the pressure increasing efficiency of fuel supplied to a fuel injection system.Type: ApplicationFiled: June 6, 2003Publication date: January 1, 2004Inventors: Hiromitsu Seo, Masanao Idogawa
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Publication number: 20020060256Abstract: In a fuel injection valve body for a direct injection type internal combustion engine, an entire nozzle body tip portion is formed in a conical shape protruding from a nozzle body outer peripheral surface covered with a cap. Therefore, neither a corner portion or a recessed portion is formed on a surface of the nozzle body tip portion. This prevents heat generated by combustion from concentrating at a corner portion or a surface area from enlarging by a recessed portion, which in turn prevents heat generated by combustion from increasing the temperature of the nozzle body tip portion. Moreover, since a foremost portion of a spherical shape is formed such that it does not form a corner portion or a recessed portion in a peripheral portion of a conical shape, heat generated by combustion does not increase the temperature of the nozzle body tip portion. The temperature of a nozzle hole can therefore be prevented from increasing and accumulation of deposits can be restricted.Type: ApplicationFiled: October 19, 2001Publication date: May 23, 2002Inventors: Hirohisa Kishi, Seiji Nonoyama, Kyosuke Ohashi, Takuya Ikoma, Hiromitsu Seo