Patents by Inventor Yasuhiro Osada
Yasuhiro Osada 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: 11956386Abstract: An emergency report can be made to a plurality of emergency services. Provided is a communication control device 2 housing a subscriber terminal 1, and the communication control device 2 includes: a call control unit 21 that connects an emergency call made from the subscriber terminal 1 to an emergency-call reception switchboard 5; and an outgoing/incoming call inhibition unit 22 that inhibits outgoing/incoming calls from/to the subscriber terminal 1 in a prescribed period, when the emergency call is disconnected by the subscriber terminal 1. The outgoing/incoming call inhibition unit 22: when a call is made from the subscriber terminal 1 in the prescribed period, determines whether the call is an emergency call or a general call; in a case of an emergency call, cancels inhibition for outgoing/incoming calls from/to the subscriber terminal 1 and connects the call by using the call control unit 21; and in a case of a general call, does not connect the call.Type: GrantFiled: November 1, 2019Date of Patent: April 9, 2024Assignee: Nippon Telegraph and Telephone CorporationInventors: Daiki Nakajima, Taichi Osada, Mikio Isawa, Yasuhiro Seki, Hiroaki Matsumura, Shinya Narita
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Patent number: 11923572Abstract: A fuel cell module includes a container and a plurality of cell members radially arranged inside the container. Inside the container, a first fluid flow path through which a first fluid that exchanges heat with an inner portion of the plurality of cell members flows is formed, and a second fluid flow path through which a second fluid that exchanges heat with an outer portion of the plurality of cell members flows is formed. A first heat exchange portion that forms the first fluid flow path and exchanges heat with the cell member has a smaller heat transfer area with the cell member than a second heat exchange portion that forms the second fluid flow path and exchanges heat with the cell member. The first fluid having a larger temperature difference with the cell member than the second fluid flows in the first fluid flow path.Type: GrantFiled: April 20, 2022Date of Patent: March 5, 2024Assignee: DENSO CORPORATIONInventors: Atsushi Hayasaka, Yuuki Mukoubara, Takashi Ojiro, Yasuhiro Osada
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Publication number: 20230238549Abstract: A fuel cell module includes: a cell stack in which fuel cells are stacked; and a stack temperature controller through which the oxidant gas before being supplied to the cell stack flows. The fuel cell module includes a warm-up burner that produces combustion gas for warming the cell stack. The warm-up burner is arranged outside a housing space in which the cell stack is housed. The stack temperature controller is arranged to face the cell stack with a predetermined gap therebetween so as to exchange heat with the cell stack. The stack temperature controller is located adjacent to a combustion gas passage through which the combustion gas generated by the warm-up burner flows so as to allow heat exchange between the oxidant gas flowing through the stack temperature controller and the combustion gas generated by the warm-up burner.Type: ApplicationFiled: March 29, 2023Publication date: July 27, 2023Inventors: Yasuhiro OSADA, Takashi OJIRO, Atsushi HAYASAKA, Reona INAGAKI
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Publication number: 20220246954Abstract: A fuel cell module includes a container and a plurality of cell members radially arranged inside the container. Inside the container, a first fluid flow path through which a first fluid that exchanges heat with an inner portion of the plurality of cell members flows is formed, and a second fluid flow path through which a second fluid that exchanges heat with an outer portion of the plurality of cell members flows is formed. A first heat exchange portion that forms the first fluid flow path and exchanges heat with the cell member has a smaller heat transfer area with the cell member than a second heat exchange portion that forms the second fluid flow path and exchanges heat with the cell member. The first fluid having a larger temperature difference with the cell member than the second fluid flows in the first fluid flow path.Type: ApplicationFiled: April 20, 2022Publication date: August 4, 2022Inventors: Atsushi HAYASAKA, Yuuki MUKOUBARA, Takashi OJIRO, Yasuhiro OSADA
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Patent number: 11211624Abstract: A fuel cell system includes a fuel cell, a fuel gas supply line, an oxidizing agent gas supply line, a fuel gas discharge line, and a reformer provided in the fuel gas supply line. A first circulating line circulates the fuel gas from the fuel gas discharge line to an upstream side of the reformer in the fuel gas supply line as a first circulating gas. The circulation device is provided in the fuel gas supply line, and suctions the first circulating gas by using the flow of the fuel gas flowing through the fuel gas supply line as a driving flow. A second circulating line circulates the fuel gas from a downstream side of the circulation device in the fuel gas supply line or the fuel gas discharge line to the upstream side of the circulation device in the fuel gas supply line as a second circulating gas.Type: GrantFiled: September 17, 2019Date of Patent: December 28, 2021Assignee: DENSO CORPORATIONInventors: Yuki Mukobara, Takayuki Sugiura, Yasuhiro Osada, Yasutoshi Doi, Atsushi Hayasaka, Takahiro Tamura
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Publication number: 20200014047Abstract: A fuel cell system includes a fuel cell, a fuel gas supply line, an oxidizing agent gas supply line, a fuel gas discharge line, and a reformer provided in the fuel gas supply line. A first circulating line circulates the fuel gas from the fuel gas discharge line to an upstream side of the reformer in the fuel gas supply line as a first circulating gas. The circulation device is provided in the fuel gas supply line, and suctions the first circulating gas by using the flow of the fuel gas flowing through the fuel gas supply line as a driving flow. A second circulating line circulates the fuel gas from a downstream side of the circulation device in the fuel gas supply line or the fuel gas discharge line to the upstream side of the circulation device in the fuel gas supply line as a second circulating gas.Type: ApplicationFiled: September 17, 2019Publication date: January 9, 2020Inventors: Yuki MUKOBARA, Takayuki SUGIURA, Yasuhiro OSADA, Yasutoshi DOI, Atsushi HAYASAKA, Takahiro TAMURA
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Patent number: 8765312Abstract: A load variation detecting section determines whether or not the actual load variation falls below a load variation threshold stored in a memory. If a load variation detecting section determines that a specific time period (for example, one minute) has elapsed since the actual load variation fell below a load variation threshold, a power supply section applies same power to reactors for the respective phases. On the other hand, a heat dissipation property calculating section measures temperature-rise rates of the elements for the respective phases, ranks the rates in order from the one having a higher heat dissipation property, and notifies the priority drive phase determining section of the result. A priority drive phase determining section chooses a phase having the highest heat dissipation property as a priority drive phase.Type: GrantFiled: June 3, 2009Date of Patent: July 1, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Osada, Takahiko Hasegawa
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Patent number: 8642194Abstract: A fuel cell system has an inlet shutoff valve provided in a main route forming an oxidized gas supply flow path, a humidifier bypass valve provided in a humidifier bypass route which is a route bypassing the main route, a fuel cell bypass valve provided in a fuel cell bypass route bypassing a fuel cell stack, and fuel cell bypass valve controlling unit. Under abnormal conditions in which one of the inlet shutoff valve and the humidifier bypass valve does not function even if the pressure in a valve opening pressure chamber of the one of the valves is at a first pressure value, the fuel cell bypass valve controlling unit restrict the opening of the fuel cell bypass valve to increase the pressure in the valve opening pressure chamber.Type: GrantFiled: March 7, 2008Date of Patent: February 4, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Osada, Tetsuya Bono
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Patent number: 8343680Abstract: A shutoff value provided on the entrance side and exit side of a fuel cell system has a diaphragm. A valve closing-side pressure chamber is provided on the upper face side of the diaphragm, and a valve opening-side pressure chamber is provided on the lower face side of the diaphragm. With the valve closing-side pressure chamber of the shutoff valve pressurized, the pressure in the chamber is maintained by ViS, Vic, and ViO in an electrically non-conducted state. Also, the pressure in the valve opening-side pressure chamber of the shutoff valve is maintained released. By this, force acting in the direction of closing a valving element acts on it through the diaphragm, maintaining the shutoff valve closed.Type: GrantFiled: November 7, 2007Date of Patent: January 1, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Osada, Tetsuya Bono, Masahiro Takeshita
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Patent number: 8252472Abstract: Fluid control valves, such as a humidifying module bypass valve, an inlet shutoff valve, an outlet shutoff valve are opened and closed by the pressure of air flowing in a fluid flow path. The pressure of air flowing in the fluid flow path is regulated, based on a drive demand pressure emitted to drive the flow control valves, by the flow rate of air discharged from an air compressor, the degree of opening of a fuel cell bypass valve, the degree of opening of an air pressure regulation valve, etc. The drive demand pressure for driving a shutoff valve is set such that, for example, the greater the absolute value of the negative pressure inside the fuel cell stack, the higher the drive demand pressure, and the air pressure is controlled to be the drive demand pressure.Type: GrantFiled: November 21, 2007Date of Patent: August 28, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yasuhiro Osada, Tetsuya Bono
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Publication number: 20120086417Abstract: A load variation detecting section 10a determines whether or not the actual load variation falls below a load variation threshold stored in a memory. If a load variation detecting section determines that a specific time period (for example, one minute) has elapsed since the actual load variation fell below a load variation threshold, a power supply section applies same power to reactors for the respective phases. On the other hand, a heat dissipation property calculating section measures temperature-rise rates of the elements for the respective phases, ranks the rates in order from the one having a higher heat dissipation property, and notifies the priority drive phase determining section of the result. A priority drive phase determining section chooses a phase having the highest heat dissipation property as a priority drive phase.Type: ApplicationFiled: June 3, 2009Publication date: April 12, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro Osada, Takahiko Hasegawa
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Publication number: 20120088172Abstract: The power generation efficiency of a fuel cell system is improved. A fuel cell and an FC converter are integrally assembled so as to allow heat transfer therebetween, and are contained in the same casing. A control unit shifts a switching mode of a boost switch included in the FC converter from a soft switching mode to a hard switching mode when a temperature of the fuel cell is lower than a lower limit value of an allowable temperature range in accordance with an output of the fuel cell.Type: ApplicationFiled: June 18, 2009Publication date: April 12, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiko Kaneko, Hiroyuki Imanishi, Yasuhiro Osada
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Publication number: 20110196628Abstract: A deterioration detection circuit which accurately measures the degree of deterioration of a device (particularly a transistor) in a semiconductor integrated circuit. The deterioration detection circuit includes a frequency measuring instrument for outputting data on the frequency of a ring oscillator and a judgment circuit for deciding whether the ring oscillator is acceptable or not. The judgment circuit receives frequency data, environment-dependent characteristic data indicating the relation between the operating environment and oscillation frequency of the ring oscillator, tolerance data indicating the tolerable oscillation frequency range for the ring oscillator, and environment-specific data for the ring oscillator in operation. An ideal oscillation frequency for the ring oscillator is calculated based on the environment-specific data and environment-dependent characteristic data and a decision is made as to whether or not the frequency data is within the range corresponding to the tolerance data.Type: ApplicationFiled: February 2, 2011Publication date: August 11, 2011Inventor: Yasuhiro OSADA
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Publication number: 20100068580Abstract: Fluid control valves, such as a humidifying module bypass valve, an inlet shutoff valve, an outlet shutoff valve are opened and closed by the pressure of air flowing in a fluid flow path. The pressure of air flowing in the fluid flow path is regulated, based on a drive demand pressure emitted to drive the flow control valves, by the flow rate of air discharged from an air compressor, the degree of opening of a fuel cell bypass valve, the degree of opening of an air pressure regulation valve, etc. The drive demand pressure for driving a shutoff valve is set such that, for example, the greater the absolute value of the negative pressure inside the fuel cell stack, the higher the drive demand pressure, and the air pressure is controlled to be the drive demand pressure.Type: ApplicationFiled: November 21, 2007Publication date: March 18, 2010Inventors: Yasuhiro Osada, Tetsuya Bono
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Publication number: 20100035106Abstract: A shutoff value provided on the entrance side and exit side of a fuel cell system has a diaphragm. A valve closing-side pressure chamber is provided on the upper face side of the diaphragm, and a valve opening-side pressure chamber is provided on the lower face side of the diaphragm. With the valve closing-side pressure chamber of the shutoff valve pressurized, the pressure in the chamber is maintained by ViS, Vic, and ViO in an electrically non-conducted state. Also, the pressure in the valve opening-side pressure chamber of the shutoff valve is maintained released. By this, force acting in the direction of closing a valving element acts on it through the diaphragm, maintaining the shutoff valve closed.Type: ApplicationFiled: November 7, 2007Publication date: February 11, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro Osada, Tetsuya Bono, Masahiro Takeshita
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Publication number: 20100021783Abstract: A fuel cell system has an inlet shutoff valve provided in a main route forming an oxidized gas supply flow path, a humidifier bypass valve provided in a humidifier bypass route which is a route bypassing the main route, a fuel cell bypass valve provided in a fuel cell bypass route bypassing a fuel cell stack, and fuel cell bypass valve controlling unit. Under abnormal conditions in which one of the inlet shutoff valve and the humidifier bypass valve does not function even if the pressure in a valve opening pressure chamber of the one of the valves is at a first pressure value, the fuel cell bypass valve controlling unit restrict the opening of the fuel cell bypass valve to increase the pressure in the valve opening pressure chamber.Type: ApplicationFiled: March 7, 2008Publication date: January 28, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yasuhiro Osada, Tetsuya Bono
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Publication number: 20070218328Abstract: The fuel system includes a fuel cell capable of generating electric power to be supplied to electric loads, a storage battery charged by the fuel cell and capable of supplying electric power stored therein to the electric loads, a first gas-supply path through which the oxidizing gas to be supplied to the fuel cell passes, a compressor for compressing the oxidizing gas passing through the first gas-supply path, a second gas-supply path branching from the first gas-supply path, through which the oxidizing gas discharged from the compressor passes toward the storage battery, a flow-switch valve operating to switch a flow direction of the oxidizing gas between a first direction through the first gas-supply path toward the fuel cell and a second direction through the second gas-supply path toward the storage battery, and a control unit controlling a flow direction switching operation of the flow-switch valve.Type: ApplicationFiled: March 14, 2007Publication date: September 20, 2007Applicant: DENSO CORPORATIONInventor: Yasuhiro Osada
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Publication number: 20050008547Abstract: A catalytic reaction heater includes a plurality of catalytic reacting sections for generating a high-temperature gas based on a catalytic reaction of fuel and oxygen, and a plurality of heat exchanging sections for increasing the temperature of a circulating heating medium based on heat exchange between the heating medium and the gas. The catalytic reacting sections and the heat exchanging sections are alternately and serially disposed along a flowing direction of the gas. A supply amount of the fuel and oxygen supplied into an upstream end catalytic reacting section is set to a value exceeding a maximum consumable level in this upstream end catalytic reacting section.Type: ApplicationFiled: June 29, 2004Publication date: January 13, 2005Applicant: DENSO CORPORATIONInventors: Shunjiro Kikawa, Masanori Uehara, Hirokuni Sasaki, Yasuhiro Osada