Patents by Inventor Hiroyuki Yumiya
Hiroyuki Yumiya 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: 9048500Abstract: A fuel cell system includes an IG switch disposed between a 14V battery and a controller. The fuel cell system also includes a start switch disposed independently of the IG switch. Upon detection of the ON state of the start switch, the controller outputs an FC start instruction to an FC auxiliary device. Moreover, an FC inverter switch is disposed between the 14V battery and the FC auxiliary device. Through the function of the controller, power supply from the 14V battery to the FC auxiliary device is suspended for a period from when a wait time, which is predeterminedly set from the moment when the IG switch is turned ON, has elapsed to the moment when the start switch is turned ON, during a wait period between the moment when the IG switch is turned ON and the moment when the start switch is turned ON.Type: GrantFiled: December 14, 2007Date of Patent: June 2, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Yumiya, Katsuki Ishigaki
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Patent number: 8927169Abstract: An object of the present invention is to provide a fuel cell system and a mobile body capable of restraining freeze in an air cleaner. The fuel cell system includes an air cleaner for cleaning the air to be supplied to a fuel cell and a heater for heating the air cleaner. The air cleaner can be alternatively heated by supplying a refrigerant in a refrigerant piping system to the air cleaner instead of using the heater.Type: GrantFiled: March 18, 2008Date of Patent: January 6, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventor: Hiroyuki Yumiya
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Patent number: 8916306Abstract: It is prevented that when a system is left unused, carried carbon ion a cathode-side catalyst to lower a power generation performance. The molar quantities of hydrogen and oxygen in a fuel gas supply/discharge system and an oxidizing gas supply/discharge system with respect to a fuel cell are calculated, and control is performed so that the molar ratio of hydrogen and oxygen which can chemically be reacted in a fuel gas and an oxidizing gas during the stop of the fuel cell is 2 or more. Hydrogen is preferably supplied in accordance with the magnitude of a cell voltage in the fuel cell so as to maintain the molar ratio. Moreover, a gas passage in the oxidizing gas supply/discharge system is preferably provided with an inlet valve and an outlet valve for sealing the oxidizing gas in the gas passage.Type: GrantFiled: March 23, 2007Date of Patent: December 23, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Nobuyuki Orihashi, Masahiro Takeshita, Hiroyuki Yumiya, Takashi Yamamoto
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Patent number: 8227143Abstract: A fuel cell system has shutoff valves installed between an air flow channel in a fuel cell and the atmosphere. The shutoff valves have valve seats and also have valve discs for sealing in air by coming into contact with the valve seats. The valve discs are adapted to be sucked toward the valve seats by negative pressure in the air flow channel in the fuel cell. The fuel cell system further has an atmosphere release valve installed between the air flow channel in the fuel cell and the shutoff valve and releasing negative pressure in the air flow channel in the fuel cell to the atmosphere. When the fuel cell is started, the shutoff valves are opened after the negative pressure in the air flow channel of the fuel cell is released. Consequently, sealing ability of the shutoff valves when the fuel cell is stopped is improved, and easiness of opening of the shutoff valves when the fuel cell is started is also improved.Type: GrantFiled: March 27, 2008Date of Patent: July 24, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Masahiro Takeshita, Hiroyuki Yumiya, Katsuki Ishigaki
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Patent number: 8187756Abstract: An ion exchange resin member 20 that serves as an impurity remover for removing impurities from fluid F discharged from a fuel cell 100 is placed in a discharge passage for the fluid F to flow through, and a dispersion means for dispersing the fluid F over, and making the fluid F flow to, an entry-side surface 21 of the ion exchange resin member 20 is placed upstream from the ion exchange resin member 20. Also, a gas discharge part and a liquid discharge part are placed downstream from a fluid outlet of the ion exchange resin member 20, and a liquid-movement-preventing means for preventing a liquid in the fluid discharged from the fluid outlet from moving toward the gas discharge part is placed between the ion exchange resin member 20 and at least either the gas discharge part or the liquid discharge part.Type: GrantFiled: September 6, 2005Date of Patent: May 29, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Nobuo Fujita, Hiroyuki Yumiya, Taisuke Miyamoto, Hiroyuki Sekine, Mituhiro Satou, Sadatoshi Takahashi
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Publication number: 20100316926Abstract: A fuel cell system performs feedback control with respect to a reactive gas supplying apparatus based on a proportional obtained by multiplying a deviation of an actual flow quantity from a target value of a reactive gas supplied to the fuel cell from the reactive gas supplying apparatus by a proportional gain and an integral term obtained by multiplying the deviation by an integration gain to perform time integration in such a manner that the actual flow quantity coincides with the target value, and changes an update arithmetic operation of the integral term in accordance with a value of the deviation.Type: ApplicationFiled: December 5, 2007Publication date: December 16, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Norimasa Ishikawa, Hiroyuki Yumiya, Katsuki Ishigaki
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Publication number: 20100310953Abstract: A fuel cell system includes an IG switch disposed between a 14V battery and a controller. The fuel cell system also includes a start switch disposed independently of the IG switch. Upon detection of the ON state of the start switch, the controller outputs an FC start instruction to an FC auxiliary device. Moreover, an FC inverter switch is disposed between the 14V battery and the FC auxiliary device. Through the function of the controller, power supply from the 14V battery to the FC auxiliary device is suspended for a period from when a wait time, which is predeterminedly set from the moment when the IG switch is turned ON, has elapsed to the moment when the start switch is turned ON, during a wait period between the moment when the IG switch is turned ON and the moment when the start switch is turned ON.Type: ApplicationFiled: December 14, 2007Publication date: December 9, 2010Inventors: Hiroyuki Yumiya, Katsuki Ishigaki
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Publication number: 20100119901Abstract: An object of the present invention is to provide a fuel cell system and a mobile body capable of restraining freeze in an air cleaner. The fuel cell system includes an air cleaner for cleaning the air to be supplied to a fuel cell and a heater for heating the air cleaner. The air cleaner can be alternatively heated by supplying a refrigerant in a refrigerant piping system to the air cleaner instead of using the heater.Type: ApplicationFiled: March 18, 2008Publication date: May 13, 2010Inventor: Hiroyuki Yumiya
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Publication number: 20100104909Abstract: A fuel cell system has shutoff valves installed between an air flow channel in a fuel cell and the atmosphere. The shutoff valves have valve seats and also have valve discs for sealing in air by coming into contact with the valve seats. The valve discs are adapted to be sucked toward the valve seats by negative pressure in the air flow channel in the fuel cell. The fuel cell system further has an atmosphere release valve installed between the air flow channel in the fuel cell and the shutoff valve and releasing negative pressure in the air flow channel in the fuel cell to the atmosphere. When the fuel cell is started, the shutoff valves are opened after the negative pressure in the air flow channel of the fuel cell is released. Consequently, sealing ability of the shutoff valves when the fuel cell is stopped is improved, and easiness of opening of the shutoff valves when the fuel cell is started is also improved.Type: ApplicationFiled: March 27, 2008Publication date: April 29, 2010Inventors: Masahiro Takeshita, Hiroyuki Yumiya, Katsuki Ishigaki
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Publication number: 20090092868Abstract: It is prevented that when a system is left unused, carried carbon ion a cathode-side catalyst to lower a power generation performance. The molar quantities of hydrogen and oxygen in a fuel gas supply/discharge system and an oxidizing gas supply/discharge system with respect to a fuel cell are calculated, and control is performed so that the molar ratio of hydrogen and oxygen which can chemically be reacted in a fuel gas and an oxidizing gas during the stop of the fuel cell is 2 or more. Hydrogen is preferably supplied in accordance with the magnitude of a cell voltage in the fuel cell so as to maintain the molar ratio. Moreover, a gas passage in the oxidizing gas supply/discharge system is preferably provided with an inlet valve and an outlet valve for sealing the oxidizing gas in the gas passage.Type: ApplicationFiled: March 23, 2007Publication date: April 9, 2009Inventors: Nobuyuki Orihashi, Masahiro Takeshita, Hiroyuki Yumiya, Takashi Yamamoto
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Publication number: 20070264554Abstract: An ion exchange resin member 20 that serves as an impurity remover for removing impurities from fluid F discharged from a fuel cell 100 is placed in a discharge passage for the fluid F to flow through, and a dispersion means for dispersing the fluid F over, and making the fluid F flow to, an entry-side surface 21 of the ion exchange resin member 20 is placed upstream from the ion exchange resin member 20. Also, a gas discharge part and a liquid discharge part are placed downstream from a fluid outlet of the ion exchange resin member 20, and a liquid-movement-preventing means for preventing a liquid in the fluid discharged from the fluid outlet from moving toward the gas discharge part is placed between the ion exchange resin member 20 and at least either the gas discharge part or the liquid discharge part.Type: ApplicationFiled: September 6, 2005Publication date: November 15, 2007Applicant: Toyota Jidosha Kabushiki KaishaInventors: Nobuo Fujita, Hiroyuki Yumiya, Taisuke Miyamoto, Hiroyuki Sekine, Mituhiro Satou, Sadatoshi Takahashi