Patents by Inventor Masayuki Toyokawa
Masayuki Toyokawa 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: 11420535Abstract: The disclosure is a battery temperature raising device for hybrid vehicle that raises the temperature of a battery. In an engine travelling mode, when an engine water temperature is higher than a specified cooling water temperature, a first battery circuit is connected to a main circuit and the temperature of the battery is raised by cooling water in the main circuit (first temperature raising control). In a motor travelling mode, when a motor generator temperature is higher than a battery temperature, the first battery circuit and a heat exchanger flow path are connected to the main circuit, and thereby a closed circuit through which cooling water circulates without passing through an engine is formed, and the temperature of the battery is raised by the cooling water that is raised in temperature by heat exchange with a refrigerant in a heat exchanger (second temperature raising control).Type: GrantFiled: February 7, 2020Date of Patent: August 23, 2022Assignee: Honda Motor Co., Ltd.Inventors: Masanobu Takazawa, Naoaki Takeda, Masayuki Toyokawa, Hajime Uto
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Patent number: 11319855Abstract: A heat accumulation and dissipation device (1) for an internal combustion engine (2) includes, in a cooling circuit (3) for circulating cooling water used to cool the internal combustion engine (2), a heat accumulator (7) for accumulating the cooling water, and an exhaust heat recovery device (9) for recovering the heat of exhaust gas through the cooling water, wherein when the internal combustion engine (2) is started, heat is dissipated by sending the cooling water of the heat accumulator (7) to the internal combustion engine (2). The cooling circuit (3) includes a heat accumulation and dissipation circuit (8) configured to perform heat accumulation and dissipation while circulating the cooling water between the internal combustion engine (2) and the heat accumulator (7), and the heat accumulator (9) is arranged upstream of the heat accumulator (7) of the heat accumulation and dissipation circuit (8).Type: GrantFiled: January 10, 2020Date of Patent: May 3, 2022Assignee: Honda Motor Co., Ltd.Inventors: Masayuki Toyokawa, Hajime Uto, Masanobu Takazawa, Naoaki Takeda, Takahiro Okada
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Publication number: 20220063394Abstract: Provided is a cooling apparatus for a hybrid vehicle, the cooling apparatus enabling effective heat exchange between coolant of an engine cooling circuit and refrigerant of an electric-system cooling circuit, and enabling an internal combustion engine and an electric-system device to be cooled and raised in temperature appropriately and speedily.Type: ApplicationFiled: January 21, 2019Publication date: March 3, 2022Inventors: Hajime UTO, Masanobu TAKAZAWA, Masayuki TOYOKAWA, Naoaki TAKEDA
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Publication number: 20220041047Abstract: A heat distribution device for hybrid vehicle is provided, including: an engine cooling circuit through which cooling water for cooling an internal combustion engine circulates; a MG cooling circuit through which a refrigerant for cooling a motor generator circulates; and a heat exchanger which performs heat exchange between the cooling water and the refrigerant. When it is determined based on a charging rate SOC of a battery that the battery can be charged, charging control is performed to charge the battery with electric power generated in a regenerative operation; when it is determined that the battery cannot be charged, heat dissipation control is performed to dissipate the heat generated by the regenerative operation to the engine cooling circuit side by the heat exchange between the refrigerant and the cooling water in the heat exchanger.Type: ApplicationFiled: October 20, 2021Publication date: February 10, 2022Applicant: Honda Motor Co., Ltd.Inventors: Masanobu TAKAZAWA, Hajime UTO, Masayuki TOYOKAWA, Naoaki TAKEDA
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Patent number: 11186165Abstract: A heat distribution device for hybrid vehicle is provided, including: an engine cooling circuit through which cooling water for cooling an internal combustion engine circulates; a MG cooling circuit through which a refrigerant for cooling a motor generator circulates; and a heat exchanger which performs heat exchange between the cooling water and the refrigerant. When it is determined based on a charging rate SOC of a battery that the battery can be charged, charging control is performed to charge the battery with electric power generated in a regenerative operation; when it is determined that the battery cannot be charged, heat dissipation control is performed to dissipate the heat generated by the regenerative operation to the engine cooling circuit side by the heat exchange between the refrigerant and the cooling water in the heat exchanger.Type: GrantFiled: January 19, 2020Date of Patent: November 30, 2021Assignee: Honda Motor Co., Ltd.Inventors: Masanobu Takazawa, Hajime Uto, Masayuki Toyokawa, Naoaki Takeda
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Patent number: 11181036Abstract: The cooling water control apparatus of the disclosure includes: a cooling water circuit; a heat accumulator which is arranged in the cooling water circuit and stores high-temperature cooling water flowing out from an internal combustion engine; an on-off valve for opening/closing the cooling water circuit; a heater passage which is connected in parallel to the cooling water circuit; and a flow rate control valve which controls a flow rate of the cooling water inside the heater passage. The cooling water inside the heat accumulator is supplied to the internal combustion engine by closing the flow rate control valve and opening the on-off valve in order to promote warm-up at the start of the internal combustion engine, and thereafter, the on-off valve is closed, and an opening degree of the flow rate control valve is controlled to make the temperature of the internal combustion engine reach a specified target temperature.Type: GrantFiled: January 17, 2020Date of Patent: November 23, 2021Assignee: Honda Motor Co., Ltd.Inventors: Masanobu Takazawa, Hajime Uto, Masayuki Toyokawa, Naoaki Takeda
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Patent number: 11088408Abstract: A battery temperature raising device is provided which raises, in a vehicle having an internal combustion engine and a motor using a chargeable battery as a power source, the temperature of the battery during charging in a state that the internal combustion engine is stopped. The battery temperature raising device includes a main circuit where cooling water circulates through the internal combustion engine; a first battery circuit connected in parallel to the main circuit; and a second flow rate control valve arranged in the first battery circuit. A first temperature raising control for raising the temperature of the battery is executed, when a battery temperature is equal to or below a predetermined temperature and an engine water temperature is higher than the battery temperature during charging the battery, by opening the second flow rate control valve and introducing the cooling water inside the main circuit into the first battery circuit.Type: GrantFiled: February 10, 2020Date of Patent: August 10, 2021Assignee: Honda Motor Co., Ltd.Inventors: Masanobu Takazawa, Hajime Uto, Naoaki Takeda, Masayuki Toyokawa
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Patent number: 10995875Abstract: The thermal management system includes a cooling circuit in which cooling water circulates, a heat exchange circuit in which cooling water performing heat exchange with a battery flows, a flow rate control valve which adjusts a flow rate of cooling water flowing from the cooling circuit to the heat exchange circuit, a shutter which adjusts an introduction amount of outside air into an engine room, and an ECU which controls an opening degree of the flow rate control valve and an opening degree of the shutter. The ECU controls the shutter and the flow rate control valve to be in a fully closed state when a cooling water temperature is less than a valve opening temperature of a thermostat valve and controls the shutter and the flow rate control valve to be in an open state when the cooling water temperature is greater than the valve opening temperature.Type: GrantFiled: July 1, 2019Date of Patent: May 4, 2021Assignee: Honda Motor Co., Ltd.Inventors: Hajime Uto, Masanobu Takazawa, Masayuki Toyokawa, Naoaki Takeda
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Publication number: 20200274209Abstract: A battery temperature raising device is provided which raises, in a vehicle having an internal combustion engine and a motor using a chargeable battery as a power source, the temperature of the battery during charging in a state that the internal combustion engine is stopped. The battery temperature raising device includes a main circuit where cooling water circulates through the internal combustion engine; a first battery circuit connected in parallel to the main circuit; and a second flow rate control valve arranged in the first battery circuit. A first temperature raising control for raising the temperature of the battery is executed, when a battery temperature is equal to or below a predetermined temperature and an engine water temperature is higher than the battery temperature during charging the battery, by opening the second flow rate control valve and introducing the cooling water inside the main circuit into the first battery circuit.Type: ApplicationFiled: February 10, 2020Publication date: August 27, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masanobu TAKAZAWA, Hajime UTO, Naoaki TAKEDA, Masayuki TOYOKAWA
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Publication number: 20200269724Abstract: The disclosure is a battery temperature raising device for hybrid vehicle that raises the temperature of a battery. In an engine travelling mode, when an engine water temperature is higher than a specified cooling water temperature, a first battery circuit is connected to a main circuit and the temperature of the battery is raised by cooling water in the main circuit (first temperature raising control). In a motor travelling mode, when a motor generator temperature is higher than a battery temperature, the first battery circuit and a heat exchanger flow path are connected to the main circuit, and thereby a closed circuit through which cooling water circulates without passing through an engine is formed, and the temperature of the battery is raised by the cooling water that is raised in temperature by heat exchange with a refrigerant in a heat exchanger (second temperature raising control).Type: ApplicationFiled: February 7, 2020Publication date: August 27, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masanobu TAKAZAWA, Naoaki TAKEDA, Masayuki TOYOKAWA, Hajime UTO
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Publication number: 20200240318Abstract: The cooling water control apparatus of the disclosure includes: a cooling water circuit; a heat accumulator which is arranged in the cooling water circuit and stores high-temperature cooling water flowing out from an internal combustion engine; an on-off valve for opening/closing the cooling water circuit; a heater passage which is connected in parallel to the cooling water circuit; and a flow rate control valve which controls a flow rate of the cooling water inside the heater passage. The cooling water inside the heat accumulator is supplied to the internal combustion engine by closing the flow rate control valve and opening the on-off valve in order to promote warm-up at the start of the internal combustion engine, and thereafter, the on-off valve is closed, and an opening degree of the flow rate control valve is controlled to make the temperature of the internal combustion engine reach a specified target temperature.Type: ApplicationFiled: January 17, 2020Publication date: July 30, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masanobu TAKAZAWA, Hajime UTO, Masayuki TOYOKAWA, Naoaki TAKEDA
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Publication number: 20200238818Abstract: A heat distribution device for hybrid vehicle is provided, including: an engine cooling circuit through which cooling water for cooling an internal combustion engine circulates; a MG cooling circuit through which a refrigerant for cooling a motor generator circulates; and a heat exchanger which performs heat exchange between the cooling water and the refrigerant. When it is determined based on a charging rate SOC of a battery that the battery can be charged, charging control is performed to charge the battery with electric power generated in a regenerative operation; when it is determined that the battery cannot be charged, heat dissipation control is performed to dissipate the heat generated by the regenerative operation to the engine cooling circuit side by the heat exchange between the refrigerant and the cooling water in the heat exchanger.Type: ApplicationFiled: January 19, 2020Publication date: July 30, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masanobu TAKAZAWA, Hajime UTO, Masayuki TOYOKAWA, Naoaki TAKEDA
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Publication number: 20200224574Abstract: A heat accumulation and dissipation device (1) for an internal combustion engine (2) includes, in a cooling circuit (3) for circulating cooling water used to cool the internal combustion engine (2), a heat accumulator (7) for accumulating the cooling water, and an exhaust heat recovery device (9) for recovering the heat of exhaust gas through the cooling water, wherein when the internal combustion engine (2) is started, heat is dissipated by sending the cooling water of the heat accumulator (7) to the internal combustion engine (2). The cooling circuit (3) includes a heat accumulation and dissipation circuit (8) configured to perform heat accumulation and dissipation while circulating the cooling water between the internal combustion engine (2) and the heat accumulator (7), and the heat accumulator (9) is arranged upstream of the heat accumulator (7) of the heat accumulation and dissipation circuit (8).Type: ApplicationFiled: January 10, 2020Publication date: July 16, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Masayuki TOYOKAWA, Hajime UTO, Masanobu TAKAZAWA, Naoaki TAKEDA, Takahiro OKADA
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Patent number: 10697352Abstract: A thermal management system of a vehicle includes: a cooling circuit in which cooling water circulates; a heat accumulator storing the cooling water; a flow control valve adjusting a flow rate of the cooling water flowing to the heat accumulator; a radiator; a thermostatic valve adjusting the flow rate of the cooling water flowing to the radiator; a grille shutter adjusting amount of outside air introduced from a front grille into an engine room; a cooling water temperature sensor; a heat radiation control unit supplying the cooling water to the cooling circuit to warm up an engine when the engine is cold; and a heat storage control unit, by controlling opening degrees of the flow control valve and the grille shutter according to a cooling water temperature, supplying from the cooling circuit to the heat accumulator the cooling water whose temperature is raised by heat of the engine.Type: GrantFiled: May 29, 2019Date of Patent: June 30, 2020Assignee: Honda Motor Co., Ltd.Inventors: Hajime Uto, Masanobu Takazawa, Masayuki Toyokawa, Naoaki Takeda
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Publication number: 20200003320Abstract: The thermal management system includes a cooling circuit in which cooling water circulates, a heat exchange circuit in which cooling water performing heat exchange with a battery flows, a flow rate control valve which adjusts a flow rate of cooling water flowing from the cooling circuit to the heat exchange circuit, a shutter which adjusts an introduction amount of outside air into an engine room, and an ECU which controls an opening degree of the flow rate control valve and an opening degree of the shutter. The ECU controls the shutter and the flow rate control valve to be in a fully closed state when a cooling water temperature is less than a valve opening temperature of a thermostat valve and controls the shutter and the flow rate control valve to be in an open state when the cooling water temperature is greater than the valve opening temperature.Type: ApplicationFiled: July 1, 2019Publication date: January 2, 2020Applicant: Honda Motor Co.,Ltd.Inventors: Hajime UTO, Masanobu TAKAZAWA, Masayuki TOYOKAWA, Naoaki TAKEDA
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Publication number: 20190383206Abstract: A thermal management system of a vehicle includes: a cooling circuit in which cooling water circulates; a heat accumulator storing the cooling water; a flow control valve adjusting a flow rate of the cooling water flowing to the heat accumulator; a radiator; a thermostatic valve adjusting the flow rate of the cooling water flowing to the radiator; a grille shutter adjusting amount of outside air introduced from a front grille into an engine room; a cooling water temperature sensor; a heat radiation control unit supplying the cooling water to the cooling circuit to warm up an engine when the engine is cold; and a heat storage control unit, by controlling opening degrees of the flow control valve and the grille shutter according to a cooling water temperature, supplying from the cooling circuit to the heat accumulator the cooling water whose temperature is raised by heat of the engine.Type: ApplicationFiled: May 29, 2019Publication date: December 19, 2019Applicant: Honda Motor Co.,Ltd.Inventors: Hajime UTO, Masanobu TAKAZAWA, Masayuki TOYOKAWA, Naoaki TAKEDA
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Patent number: 7418933Abstract: A variable lift valve operating system for an internal combustion engine, including a variable lift mechanism capable of changing a lift amount of an engine valve in accordance with rotation of a control shaft rotatably supported in a cylinder head, and an actuator which has an electric motor and power transmission means interposed between the electric motor and the control shaft, and which is connected to the control shaft. The actuator is constructed to have an oilless structure without oil supply, thereby always stably and rotationally driving the control shaft.Type: GrantFiled: April 13, 2006Date of Patent: September 2, 2008Assignee: Honda Motor Co., Ltd.Inventors: Takahumi Mizorogi, Masayuki Toyokawa, Hidetaka Ozawa, Hiroyuki Murase
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Publication number: 20060254544Abstract: A variable lift valve operating system for an internal combustion engine, includes a variable lift mechanism capable of changing a lift amount of an engine valve in accordance with rotation of a control shaft rotatably supported in a cylinder head, and an actuator which has an electric motor and power transmission means interposed between the electric motor and the control shaft, and which is connected to the control shaft. The actuator is constructed to have an oilless structure without oil supply, thereby always stably and rotationally driving the control shaft.Type: ApplicationFiled: April 13, 2006Publication date: November 16, 2006Applicant: HONDA MOTOR CO., LTDInventors: Takahumi Mizorogi, Masayuki Toyokawa, Hidetaka Ozawa, Hiroyuki Murase
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Patent number: 6883538Abstract: A flow control valve coupling structure that does not require complicated machining and facilitates the installation of a flow control valve. The coupling structure includes a fitting portion having a male thread that is formed on a peripheral surface of the flow control valve. A coupled member has a coupling hole to receive the flow control valve. A cylindrical elastic sealing member is engaged with the coupling hole to seal the space between the flow control valve and the coupling hole. The elastic sealing member has an inner surface defining a mounting hole in which the fitting portion is fitted. A female thread is formed on the inner surface and is mated with the male thread of the fitting portion.Type: GrantFiled: November 15, 2001Date of Patent: April 26, 2005Assignees: Pacific Engineering Corp., Honda Giken Kogyo Kabushiki KaishaInventors: Masayuki Toyokawa, Hiromu Nakamura, Ryohei Adachi, Iwao Murakami, Chikashi Ono
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Publication number: 20020062869Abstract: A flow control valve coupling structure that does not require complicated machining and facilitates the installation of a flow control valve. The coupling structure includes a fitting portion having a male thread that is formed on a peripheral surface of the flow control valve. A coupled member has a coupling hole to receive the flow control valve. A cylindrical elastic sealing member is engaged with the coupling hole to seal the space between the flow control valve and the coupling hole. The elastic sealing member has an inner surface defining a mounting hole in which the fitting portion is fitted. A female thread is formed on the inner surface and is mated with the male thread of the fitting portion.Type: ApplicationFiled: November 15, 2001Publication date: May 30, 2002Inventors: Masayuki Toyokawa, Hiromu Nakamura, Ryohei Adachi, Iwao Murakami, Chikashi Ono