Patents by Inventor Munemitsu WATANABE
Munemitsu WATANABE 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: 11565603Abstract: A sub-battery (33) having an internal resistance lower than that of a main battery (32) is connected to a power supply circuit (31) connected to the main battery (32). In this case, the sub-battery (33) is connected to the power supply circuit (31) after the voltage ECKT of the power supply circuit (31) is adjusted to the voltage ESub of the sub-battery (33) by controlling the power generation voltage EALT of an alternator (24) connected to the power supply circuit (31).Type: GrantFiled: September 15, 2021Date of Patent: January 31, 2023Assignee: Nissan Motor Co., Ltd.Inventors: Akifumi Koishi, Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya
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Patent number: 11309578Abstract: A power supply system that is mountable on a vehicle includes a lithium-ion storage battery connected to an electrical load via two paths being a first path and a second path, a power generator capable of charging the lithium-ion storage battery, a first switch provided on the first path, an electrical resistance element provided on the second path, and a controller configured to control on/off of the power generator and perform on/off control of the first switch. According to a voltage increase request from the electrical load, the controller is configured to turn of the first switch such that a power supply to the lithium-ion storage battery through the first path from the power generator is cut.Type: GrantFiled: March 13, 2017Date of Patent: April 19, 2022Assignee: Nissan Motor Co., Ltd.Inventors: Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Masahiko Tahara, Terumasa Tsuchiya, Atsushi Tezuka
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Publication number: 20220001768Abstract: A sub-battery (33) having an internal resistance lower than that of a main battery (32) is connected to a power supply circuit (31) connected to the main battery (32). In this case, the sub-battery (33) is connected to the power supply circuit (31) after the voltage ECKT of the power supply circuit (31) is adjusted to the voltage ESub of the sub-battery (33) by controlling the power generation voltage EALT of an alternator (24) connected to the power supply circuit (31).Type: ApplicationFiled: September 15, 2021Publication date: January 6, 2022Applicant: Nissan Motor Co., Ltd.Inventors: Akifumi Koishi, Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya
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Patent number: 10804733Abstract: A power supply system that is mountable on a vehicle has a lead-acid storage battery connected to an electrical load, a lithium-ion storage battery having different charge and discharge characteristics form the lead-acid storage battery, and connected in parallel with the lead-acid storage battery with respect to the electrical load, a power generator configured to charge the lead-acid storage battery and the lithium-ion storage battery, and a controller configured to drive the power generator based on a relationship between a discharge current of the lead-acid storage battery and a discharge current of the lithium-ion storage battery.Type: GrantFiled: January 10, 2017Date of Patent: October 13, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Tomoyuki Koike, Akifumi Koishi, Masahiko Tahara, Munemitsu Watanabe, Atsushi Tezuka, Terumasa Tsuchiya
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Patent number: 10784697Abstract: A vehicle power supply control method includes switching, when a constant voltage is required of a power supply circuit in generating electric power by a power generator, the power supply circuit being connected to a primary storage battery and configured to be connected to a secondary storage battery that has a lower internal resistance than that of the primary storage battery, between connection of the secondary storage battery to the power supply circuit and disconnection of the secondary storage battery from the power supply circuit depending on the required constant voltage, current output to the power supply circuit by the power generator, and a state of charge of the secondary storage battery.Type: GrantFiled: September 25, 2015Date of Patent: September 22, 2020Assignee: Nissan Motor Co., Ltd.Inventors: Akifumi Koishi, Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya
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Patent number: 10364759Abstract: A vehicle traveling control method includes detecting a remaining fuel amount in a fuel tank including a fuel chamber in which a suction port of a fuel pump is disposed for sucking fuel to be supplied to an engine, the fuel tank being configured to generate negative pressure for sucking fuel to the fuel chamber by ejecting a part of fuel sucked by the fuel pump into the fuel chamber via a fuel line, permitting, when a predetermined condition is satisfied, inertial traveling during which a vehicle travels, with the engine kept stopped, operating, when the detected remaining fuel amount is less than a first threshold, the fuel pump despite the engine stopped owing to the inertial traveling, and prohibiting stop of the engine when the detected remaining fuel amount is less than a second threshold smaller than the first threshold.Type: GrantFiled: August 20, 2015Date of Patent: July 30, 2019Assignee: Nissan Motor Co., Ltd.Inventors: Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Terumasa Tsuchiya, Masahiko Tahara, Atsushi Tezuka
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Publication number: 20190103629Abstract: A power supply system that is mountable on a vehicle includes a lithium-ion storage battery connected to an electrical load via two paths being a first path and a second path, a power generator capable of charging the lithium-ion storage battery, a first switch provided on the first path, an electrical resistance element provided on the second path, and a controller configured to control on/off of the power generator and perform on/off control of the first switch. According to a voltage increase request from the electrical load, the controller is configured to turn of the first switch such that a power supply to the lithium-ion storage battery through the first path from the power generator is cut.Type: ApplicationFiled: March 13, 2017Publication date: April 4, 2019Applicant: NISSAN MOTOR CO., LTD.Inventors: Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Masahiko Tahara, Terumasa Tsuchiya, Atsushi Tezuka
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Publication number: 20190044367Abstract: A power supply system that is mountable on a vehicle has a lead-acid storage battery connected to an electrical load, a lithium-ion storage battery having different charge and discharge characteristics form the lead-acid storage battery, and connected in parallel with the lead-acid storage battery with respect to the electrical load, a power generator configured to charge the lead-acid storage battery and the lithium-ion storage battery, and a controller configured to drive the power generator based on a relationship between a discharge current of the lead-acid storage battery and a discharge current of the lithium-ion storage battery.Type: ApplicationFiled: January 10, 2017Publication date: February 7, 2019Applicant: NISSAN MOTOR CO., LTD.Inventors: Tomoyuki KOIKE, Akifumi KOISHI, Masahiko TAHARA, Munemitsu WATANABE, Atsushi TEZUKA, Terumasa TSUCHIYA
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Patent number: 10144373Abstract: A power supply system control device for controlling a power supply system including an electric generator, a first electricity storage configured to be charged with and to discharge electric power generated by the electric generator, a second electricity storage configured to be charged with and to discharge the generated electric power, two paths connecting between the first electricity storage and the second electricity storage, a switching unit including a first switch configured to switch between a conductive state and a non-conductive state of one of the paths, and a second switch configured to switch between a conductive state and a non-conductive state of the other of the paths, and an electric load of a vehicle that is connected to the first electricity storage side of the switching unit.Type: GrantFiled: May 22, 2015Date of Patent: December 4, 2018Assignee: NISSAN MOTOR CO., LTD.Inventors: Masahiko Tahara, Terumasa Tsuchiya, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi
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Patent number: 10119513Abstract: A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine has a power generator, a first storage unit that can be charged with and can discharge generated power generated by the power generator, a second storage unit that can be charged with and can discharge the generated power, two paths connecting the first storage unit and the second storage unit, a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition, and an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart.Type: GrantFiled: May 12, 2015Date of Patent: November 6, 2018Assignee: NISSAN MOTOR CO., LTD.Inventors: Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Terumasa Tsuchiya
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Publication number: 20180290557Abstract: A vehicle power supply control device includes a main battery connected to a power supply circuit, a sub-battery having an internal resistance lower than an internal resistance of the main battery, an electric generator which is connected to the power supply circuit and has a controllable power generation voltage, and a connection controller configured to connect the sub-battery to the power supply circuit after adjusting a voltage on a side of the power supply circuit close to a voltage of the sub-battery by controlling the power generation voltage of the electric generator. The main battery is configured to be disconnectable from the power supply circuit. The connection controller is configured to disconnect the main battery from the power supply circuit first, then control the power generation voltage of the electric generator to adjust the power generation voltage close to the voltage of the sub-battery.Type: ApplicationFiled: October 2, 2015Publication date: October 11, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Akifumi Koishi, Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya
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Publication number: 20180265021Abstract: A vehicle power supply control method includes switching, when a constant voltage is required of a power supply circuit in generating electric power by a power generator, the power supply circuit being connected to a primary storage battery and configured to be connected to a secondary storage battery that has a lower internal resistance than that of the primary storage battery, between connection of the secondary storage battery to the power supply circuit and disconnection of the secondary storage battery from the power supply circuit depending on the required constant voltage, current output to the power supply circuit by the power generator, and a state of charge of the secondary storage battery.Type: ApplicationFiled: September 25, 2015Publication date: September 20, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Akifumi Koishi, Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya
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Publication number: 20180245525Abstract: A vehicle traveling control method includes detecting a remaining fuel amount in a fuel tank including a fuel chamber in which a suction port of a fuel pump is disposed for sucking fuel to be supplied to an engine, the fuel tank being configured to generate negative pressure for sucking fuel to the fuel chamber by ejecting a part of fuel sucked by the fuel pump into the fuel chamber via a fuel line, permitting, when a predetermined condition is satisfied, inertial traveling during which a vehicle travels, with the engine kept stopped, operating, when the detected remaining fuel amount is less than a first threshold, the fuel pump despite the engine stopped owing to the inertial traveling, and prohibiting stop of the engine when the detected remaining fuel amount is less than a second threshold smaller than the first threshold.Type: ApplicationFiled: August 20, 2015Publication date: August 30, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Terumasa Tsuchiya, Masahiko Tahara, Atsushi Tezuka
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Publication number: 20180147915Abstract: A vehicle air-conditioning system that performs air heating by utilizing heat of a coolant that cools an engine includes a circulation flow passage connecting a coolant inflow portion and a coolant discharge portion of the engine, a heating heater core disposed in the circulation flow passage, a radiator disposed in the circulation flow passage, a radiator fan configured to supply an air to the radiator, and a controller configured to control the radiator fan. When a water pump configured to pressure-feed the coolant is stopped during automatic stop of the engine, the controller drives to rotate the radiator fan during automatic stop of the engine so as to let convection take place in the coolant in the radiator and supply the coolant to the heating heater core.Type: ApplicationFiled: May 28, 2015Publication date: May 31, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Atsushi Tezuka, Masahiko Tahara, Tomoyuki Koike, Munemitsu Watanabe, Terumasa Tsuchiya, Akifumi Koishi
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Publication number: 20180134240Abstract: A power supply system control device for controlling a power supply system including an electric generator, a first electricity storage configured to be charged with and to discharge electric power generated by the electric generator, a second electricity storage configured to be charged with and to discharge the generated electric power, two paths connecting between the first electricity storage and the second electricity storage, a switching unit including a first switch configured to switch between a conductive state and a non-conductive state of one of the paths, and a second switch configured to switch between a conductive state and a non-conductive state of the other of the paths, and an electric load of a vehicle that is connected to the first electricity storage side of the switching unit.Type: ApplicationFiled: May 22, 2015Publication date: May 17, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Masahiko Tahara, Terumasa Tsuchiya, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi
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Publication number: 20180126856Abstract: A power supply system in a vehicle having an idling stop function for executing an automatic stop and an automatic restart on an engine has a power generator, a first storage unit that can be charged with and can discharge generated power generated by the power generator, a second storage unit that can be charged with and can discharge the generated power, two paths connecting the first storage unit and the second storage unit, a switching unit including a first switch for switching one path of the two paths between a conductive condition and a non-conductive condition, and a second switch for switching another path of the two paths between a conductive condition and a non-conductive condition, and an engine restarter connected to either the first storage unit side or the second storage unit side of the switching unit in order to start the engine during the automatic restart.Type: ApplicationFiled: May 12, 2015Publication date: May 10, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Masahiko Tahara, Atsushi Tezuka, Tomoyuki Koike, Munemitsu Watanabe, Akifumi Koishi, Terumasa Tsuchiya
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Patent number: 9664169Abstract: An engine start control system includes a manual transmission, an upper switch, a lower switch, and an engine start control unit. The upper switch detects a pedal depression start operation by detecting a resting foot state from a foot released state. The lower switch detects a pedal depression terminating operation when the clutch pedal is depressed to an end position. The engine start control unit is configured to start the engine from a stopped state when signals of the upper switch indicates the pedal depression start operation and of the lower switch indicates the pedal depression terminating operation, and the engine start control unit being configured to prohibit starting of the engine, when the signal of the upper switch indicates switching from the foot released state to the pedal depression start operation, in response to detection of the signal of the lower switch indicating the pedal depression terminating operation.Type: GrantFiled: December 6, 2013Date of Patent: May 30, 2017Assignee: Nissan Motor Co., Ltd.Inventors: Yuuichi Hosaka, Hiromoto Shimizu, Munemitsu Watanabe
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Publication number: 20160230736Abstract: An engine start control system includes a manual transmission, an upper switch, a lower switch, and an engine start control unit. The upper switch detects a pedal depression start operation by detecting a resting foot state from a foot released state. The lower switch detects a pedal depression terminating operation when the clutch pedal is depressed to an end position. The engine start control unit is configured to start the engine from a stopped state when signals of the upper switch indicates the pedal depression start operation and of the lower switch indicates the pedal depression terminating operation, and the engine start control unit being configured to prohibit starting of the engine, when the signal of the upper switch indicates switching from the foot released state to the pedal depression start operation, in response to detection of the signal of the lower switch indicating the pedal depression terminating operation.Type: ApplicationFiled: December 6, 2013Publication date: August 11, 2016Inventors: Yuuichi HOSAKA, Hiromoto SHIMIZU, Munemitsu WATANABE