Patents by Inventor Hideto WAKABAYASHI
Hideto WAKABAYASHI 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: 20230398976Abstract: A driving force control system for a hybrid vehicle configured to prevent an increase in emission while achieving a required driving force in a condition where an accumulation of particulate matter on a particulate filter is small. A controller is configured to set a threshold level of an SOC level of a battery to shift from a motor mode to a hybrid mode to a higher level and set an upper limit power of an engine in the hybrid mode to a lower power, in a situation where the amount of particulate matter accumulated in a GPF is equal to or smaller than a predetermined amount.Type: ApplicationFiled: April 26, 2023Publication date: December 14, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideto WAKABAYASHI, Masahiro SATO, Seitaro MISAWA
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Patent number: 11673542Abstract: A controller is installed in a vehicle. The vehicle includes an engine, rotary electric machine for power generation, rotary electric machine for propulsion, power storage device, inverter for power generation, and inverter for propulsion. The controller includes a drive control changing unit that changes drive control of at least one of the rotary electric machine for power generation and the rotary electric machine for propulsion, for reduction of a total value of a power-generation-side ripple current generated according to an operating state of the rotary electric machine for power generation, and a drive-side ripple current generated according to the operating state of the rotary electric machine for propulsion, when the total value is equal to or larger than a preset threshold value.Type: GrantFiled: September 30, 2020Date of Patent: June 13, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga Hagimoto, Hirotaka Saito, Hideto Wakabayashi
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Patent number: 11573092Abstract: A control system for a hybrid vehicle includes: an electric heater configured to heat a catalyst of an internal combustion engine; a position determination unit configured to determine whether the hybrid vehicle is located in an exit area of a low emission zone where operation of the internal combustion engine is supposed to be restricted, the exit area being an area adjacent to a boundary of the low emission zone; and a heater control unit configured to turn on the electric heater when the position determination unit determines that the hybrid vehicle is located in the exit area.Type: GrantFiled: June 23, 2021Date of Patent: February 7, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiyuki Kageura, Daiki Yokoyama, Kosuke Yamamoto, Hideto Wakabayashi, Yoshifumi Hayashi
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Patent number: 11536211Abstract: A powertrain system includes a port injection internal combustion engine. A first start process is a process in which fuel is enclosed in a compression stroke cylinder when the engine is stopped, and based on a stored crank stop position, ignition is performed in a first cycle of the compression stroke cylinder upon engine start. A second start process is a process in which, based on the stored crank stop position, fuel injection is performed for an intake stroke cylinder while the engine is stopped, and based on the stored crank stop position, ignition is performed in the first cycle of the intake stroke cylinder upon engine start. When a catalyst temperature at the time engine start is requested is equal to or higher than a first threshold, a control device starts the internal combustion engine by at least one of the first start process and the second start process.Type: GrantFiled: July 1, 2020Date of Patent: December 27, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shintaro Hotta, Takashi Kawai, Shunsuke Fushiki, Hideto Wakabayashi, Hirokazu Ito
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Patent number: 11459968Abstract: An engine misfire detection device is mounted on a hybrid electric vehicle that includes an internal combustion engine and a generator. The internal combustion engine has a plurality of cylinders and a crankshaft and is dedicated to power generation. The generator is connected to the crankshaft via a torsional damper. The engine misfire detection device includes a generator rotation angle sensor and a processor. The generator rotation angle sensor detects the rotation angle of the generator rotating shaft. The processor is configured to execute a misfire detection process. The misfire detection process includes a first misfire detection process of determining that the internal combustion engine has misfired when an amplitude correlation value that correlates with the magnitude of amplitude of rotation speed of the generator rotating shaft and is detected by the generator rotation angle sensor is greater than a determination threshold value.Type: GrantFiled: November 9, 2021Date of Patent: October 4, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shintaro Hotta, Yuya Takahashi, Hiroki Iguma, Hideto Wakabayashi
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Patent number: 11453295Abstract: A control system for a vehicle to prevent a reduction in a drive force due to increase in an internal resistance of a battery. A controller calculates a command value of an output power of the battery to be transmitted to a motor in future, and predicts an internal resistance of the battery at the point to discharge the electric power from the battery in the amount of the command value. If it is expected that the battery will not be possible to discharge the electric power in the amount of the command value, the controller reduces a load on the battery by increasing an amount of the electric power supplied to the motor from the generator before the battery can no longer discharge the electric power in the amount of the command value.Type: GrantFiled: August 26, 2020Date of Patent: September 27, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Iwata, Taiga Hagimoto, Hideto Wakabayashi
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Publication number: 20220145820Abstract: An engine misfire detection device is mounted on a hybrid electric vehicle that includes an internal combustion engine and a generator. The internal combustion engine has a plurality of cylinders and a crankshaft and is dedicated to power generation. The generator is connected to the crankshaft via a torsional damper. The engine misfire detection device includes a generator rotation angle sensor and a processor. The generator rotation angle sensor detects the rotation angle of the generator rotating shaft. The processor is configured to execute a misfire detection process. The misfire detection process includes a first misfire detection process of determining that the internal combustion engine has misfired when an amplitude correlation value that correlates with the magnitude of amplitude of rotation speed of the generator rotating shaft and is detected by the generator rotation angle sensor is greater than a determination threshold value.Type: ApplicationFiled: November 9, 2021Publication date: May 12, 2022Inventors: Shintaro Hotta, Yuya Takahashi, Hiroki Iguma, Hideto Wakabayashi
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Publication number: 20210404825Abstract: A control system for a hybrid vehicle includes: an electric heater configured to heat a catalyst of an internal combustion engine; a position determination unit configured to determine whether the hybrid vehicle is located in an exit area of a low emission zone where operation of the internal combustion engine is supposed to be restricted, the exit area being an area adjacent to a boundary of the low emission zone; and a heater control unit configured to turn on the electric heater when the position determination unit determines that the hybrid vehicle is located in the exit area.Type: ApplicationFiled: June 23, 2021Publication date: December 30, 2021Inventors: Yoshiyuki KAGEURA, Daiki YOKOYAMA, Kosuke YAMAMOTO, Hideto WAKABAYASHI, Yoshifumi HAYASHI
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Publication number: 20210171010Abstract: A controller is installed in a vehicle. The vehicle includes an engine, rotary electric machine for power generation, rotary electric machine for propulsion, power storage device, inverter for power generation, and inverter for propulsion. The controller includes a drive control changing unit that changes drive control of at least one of the rotary electric machine for power generation and the rotary electric machine for propulsion, for reduction of a total value of a power-generation-side ripple current generated according to an operating state of the rotary electric machine for power generation, and a drive-side ripple current generated according to the operating state of the rotary electric machine for propulsion, when the total value is equal to or larger than a preset threshold value.Type: ApplicationFiled: September 30, 2020Publication date: June 10, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga HAGIMOTO, Hirotaka SAITO, Hideto WAKABAYASHI
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Publication number: 20210078411Abstract: A control system for a vehicle to prevent a reduction in a drive force due to increase in an internal resistance of a battery. A controller calculates a command value of an output power of the battery to be transmitted to a motor in future, and predicts an internal resistance of the battery at the point to discharge the electric power from the battery in the amount of the command value. If it is expected that the battery will not be possible to discharge the electric power in the amount of the command value, the controller reduces a load on the battery by increasing an amount of the electric power supplied to the motor from the generator before the battery can no longer discharge the electric power in the amount of the command value.Type: ApplicationFiled: August 26, 2020Publication date: March 18, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi IWATA, Taiga HAGIMOTO, Hideto WAKABAYASHI
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Publication number: 20210062742Abstract: A powertrain system includes a port injection internal combustion engine. A first start process is a process in which fuel is enclosed in a compression stroke cylinder when the engine is stopped, and based on a stored crank stop position, ignition is performed in a first cycle of the compression stroke cylinder upon engine start. A second start process is a process in which, based on the stored crank stop position, fuel injection is performed for an intake stroke cylinder while the engine is stopped, and based on the stored crank stop position, ignition is performed in the first cycle of the intake stroke cylinder upon engine start. When a catalyst temperature at the time engine start is requested is equal to or higher than a first threshold, a control device starts the internal combustion engine by at least one of the first start process and the second start process.Type: ApplicationFiled: July 1, 2020Publication date: March 4, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shintaro HOTTA, Takashi KAWAI, Shunsuke FUSHIKI, Hideto WAKABAYASHI, Hirokazu ITO
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Publication number: 20170363025Abstract: In an internal combustion engine that includes: an EGR channel that connects a portion of an exhaust channel on the upstream side of a downstream-side catalyst and a portion of an intake channel on the downstream side of both of a compressor and a throttle valve; and an EGR valve configured to open and close the EGR channel, a control apparatus is programmed, where an occurrence of a blow-through air that flows from the intake channel to the exhaust channel via the EGR channel is detected, to limit a throttle downstream pressure to reduce the overheating of the downstream-side catalyst.Type: ApplicationFiled: June 19, 2017Publication date: December 21, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masatoshi YOSHINAGA, Shinji SADAKANE, Hiroshi YOSHIMURA, Hideto WAKABAYASHI