Patents by Inventor Taiga Hagimoto
Taiga Hagimoto 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: 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: 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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Patent number: 11325581Abstract: A control system for a hybrid vehicle configured to start an engine promptly during propulsion in an electric vehicle mode. Electric power generation resulting from cranking the engine by a first motor is greater in the first electric vehicle mode compared to a second electric vehicle mode. A controller that is configured to determines whether an acceptable input power to an electric storage unit is smaller than a threshold value. If the acceptable input power to the electric storage unit is smaller than the threshold value, selection of the first electric vehicle mode is inhibited.Type: GrantFiled: September 3, 2019Date of Patent: May 10, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Ebuchi, Tatsuya Imamura, Soichiro Shimura, Yoichiro Isami, Takuya Hirata, Shogo Sakatani, Taiga Hagimoto
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Patent number: 11279339Abstract: A hybrid vehicle includes a generator, a driving motor, and a battery. The control system includes the hybrid vehicle, and a controller for controlling the generator and the driving motor. The controller calculates a battery output request value and a power-generating output request value based on traveling conditions of the vehicle, and controls the driving motor and the power generator based on these values. At this time, when a state of the battery is a state in which the power-generating output request value is not satisfied, the controller executes an adjustment process for adjusting the battery output request value and the power-generating output request value. In the adjustment process, the smaller the remaining capacity of the battery, the smaller the battery output request value is and the larger the power-generating output request value is.Type: GrantFiled: October 3, 2019Date of Patent: March 22, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga Hagimoto, Tetsuhiro Maki
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Publication number: 20220080949Abstract: A hybrid vehicle includes: a power generation device including an engine, a first rotating electric machine, and a first inverter; a drive device including a second rotating electric machine that outputs driving force, and a second inverter; an electric storage device that exchanges electric power with the power generation device and the drive device; a switching device that switches electrical connection of the electric storage device and the power generation device between parallel connection and series connection; and a control device that at least controls the switching device. Further, the control device controls the switching device in such a manner as to switch the electric storage device and the power generation device from the parallel connection to the series connection in a case where a combination of a vehicle speed and driving force satisfies a predetermined condition while the hybrid vehicle is traveling.Type: ApplicationFiled: September 13, 2021Publication date: March 17, 2022Inventors: Taiga Hagimoto, Takashi Iwata
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Patent number: 11108093Abstract: A power-supply control device includes: a distribution adjustment unit adjusting electric energy; and a loss comparison unit comparing losses in power running and regeneration and determining, with respect to power running and regeneration, whether a loss in a current state is smaller. Further, the distribution adjustment unit adjusts the electric energy by performing the distribution in accordance with the remaining capacity ratio in the current state in a case where it is determined that the loss in power running is smaller when the current state is a power running state or in a case where it is determined that the loss in regeneration is smaller when the current state is a regeneration state.Type: GrantFiled: April 5, 2019Date of Patent: August 31, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga Hagimoto, Yasuhiro Oshiumi, Satoru Ito, Tatsuya Yoshida
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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: 20200156620Abstract: A hybrid vehicle includes a generator, a driving motor, and a battery. The control system includes the hybrid vehicle, and a controller for controlling the generator and the driving motor. The controller calculates a battery output request value and a power-generating output request value based on traveling conditions of the vehicle, and controls the driving motor and the power generator based on these values. At this time, when a state of the battery is a state in which the power-generating output request value is not satisfied, the controller executes an adjustment process for adjusting the battery output request value and the power-generating output request value. In the adjustment process, the smaller the remaining capacity of the battery, the smaller the battery output request value is and the larger the power-generating output request value is.Type: ApplicationFiled: October 3, 2019Publication date: May 21, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga Hagimoto, Tetsuhiro Maki
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Publication number: 20200086847Abstract: A control system for a hybrid vehicle configured to start an engine promptly during propulsion in an electric vehicle mode. Electric power generation resulting from cranking the engine by a first motor is greater in the first electric vehicle mode compared to a second electric vehicle mode. A controller that is configured to determines whether an acceptable input power to an electric storage unit is smaller than a threshold value. If the acceptable input power to the electric storage unit is smaller than the threshold value, selection of the first electric vehicle mode is inhibited.Type: ApplicationFiled: September 3, 2019Publication date: March 19, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki EBUCHI, Tatsuya IMAMURA, Soichiro SHIMURA, Yoichiro ISAMI, Takuya HIRATA, Shogo SAKATANI, Taiga HAGIMOTO
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Publication number: 20190319315Abstract: A power-supply control device includes: a distribution adjustment unit adjusting electric energy; and a loss comparison unit comparing losses in power running and regeneration and determining, with respect to power running and regeneration, whether a loss in a current state is smaller. Further, the distribution adjustment unit adjusts the electric energy by performing the distribution in accordance with the remaining capacity ratio in the current state in a case where it is determined that the loss in power running is smaller when the current state is a power running state or in a case where it is determined that the loss in regeneration is smaller when the current state is a regeneration state.Type: ApplicationFiled: April 5, 2019Publication date: October 17, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Taiga HAGIMOTO, Yasuhiro OSHIUMI, Satoru ITO, Tatsuya YOSHIDA
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Patent number: 10385752Abstract: An amount of reducing agent adsorbed on a NOx catalyst when a reducing agent supply device is normal and a corresponding detected value may be estimated. The corresponding detected value may be detected by a NOx sensor, and the detected value may correspond to an amount of reducing agent adsorbed on the NOx catalyst. When the estimated amount of adsorption is larger than or equal to a first amount and is smaller than or equal to a second amount, a diagnosis of the NOx catalyst based on the detected value of the NOx sensor may be prevented. The first amount may be an amount of adsorbed reducing agent corresponding to a minimum value of the corresponding detected value. The second amount may be an amount of adsorbed reducing agent corresponding to the corresponding detected value when the amount of adsorbed reducing agent is zero and larger than the first amount.Type: GrantFiled: June 10, 2016Date of Patent: August 20, 2019Assignee: Toyota Jidosha Kabushiki KaishaInventors: Arifumi Matsumoto, Taiga Hagimoto, Kenji Furui, Makoto Ogiso, Toru Kidokoro
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Patent number: 10221746Abstract: The invention provides a technique for more accurately executing failure diagnosis for an exhaust gas control apparatus having both a selective reduction function and a filter function. To this end, a failure diagnosis apparatus according to the invention for the exhaust gas control apparatus having both the selective reduction function and the filter function computes a NOx purification rate pertaining to a case where the exhaust gas control apparatus is normal based on an estimated value of the amount of particulate matter (PM) collected or accumulated in the exhaust gas control apparatus and an estimated value of the NO2 ratio of exhaust gas flowing into the exhaust gas control apparatus, and determines that the exhaust gas control apparatus fails when the difference between the result of the calculation and an actual NOx purification rate exceeds a threshold.Type: GrantFiled: December 12, 2013Date of Patent: March 5, 2019Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toru Kidokoro, Arifumi Matsumoto, Kazuya Takaoka, Hirokazu Nishijima, Taiga Hagimoto, Yuki Terui, Akifumi Uozumi
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Patent number: 10138786Abstract: An additive amount of a reducing agent to a selective reduction-type NOx catalyst is optimized. An ammonia adsorption amount of the selective reduction-type NOx catalyst is estimated based on one or a plurality of prescribed parameters related to the ammonia adsorption amount and a specific ammonia adsorption amount that is an estimated value of the ammonia adsorption amount specified by at least one of a maximum value and a minimum value of an estimated value of the ammonia adsorption amount is estimated based on an error in the prescribed parameter, and when the specific ammonia adsorption amount is outside a target range of the ammonia adsorption amount, addition of an ammonia precursor or ammonia using an adding valve is controlled such that the specific ammonia adsorption amount returns to the target range.Type: GrantFiled: August 4, 2015Date of Patent: November 27, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventors: Arifumi Matsumoto, Toru Kidokoro, Taiga Hagimoto, Kenji Furui, Akifumi Uozumi
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Patent number: 10125654Abstract: An exhaust control system for an internal combustion engine comprises: a trapping capability acquisition part that obtains information regarding a PM trapping capability, based on a detection value of an exhaust sensor provided to detect a predetermined parameter relating to an exhaust gas flowing out of an SCRF; and a NOx reduction capability acquisition part obtains information regarding a NOx reduction capability, based on an amount of NOx in the exhaust gas flowing out of the SCRF. The exhaust control system determines and distinguishes between a trapping abnormal state in which a PM trapping function by the SCRF is failed and a sensor abnormal state in which a detection function of the predetermined parameter by the exhaust sensor is failed, based on the NOx reduction capability obtained by the NOx reduction capability acquisition part, when the trapping capability obtained by the trapping capability acquisition part is in a predetermined low trapping capability state.Type: GrantFiled: December 19, 2014Date of Patent: November 13, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventors: Taiga Hagimoto, Tomoyuki Kogo, Arifumi Matsumoto, Kenji Furui, Akifumi Uozumi
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Patent number: 10066533Abstract: A device is provided, which makes it possible to perform a failure diagnostics for a filter more accurately even in the case of an internal combustion engine which is constructed to be capable of using both of gaseous fuel and liquid fuel. The device of the invention comprises judging means which judges any failure of the filter by comparing the added-up amount of the particulate matter contained in the exhaust gas as detected by a PM amount detecting sensor during a predetermined period and the added-up amount of the particulate matter contained in the exhaust gas as estimated by PM amount estimating means during the predetermined period, wherein the PM amount estimating means estimates the added-up amount of the particulate matter contained in the exhaust gas on the basis of the predetermined parameter and only a fuel injection amount of the liquid fuel out of a fuel injection amount of the gaseous fuel and the fuel injection amount of the liquid fuel.Type: GrantFiled: July 8, 2015Date of Patent: September 4, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki Kogo, Makoto Ogiso, Taiga Hagimoto
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Patent number: 9759117Abstract: A diagnostic system for an internal combustion engine is disclosed. The diagnostic system may include an electronic control unit. The electronic control unit may determine whether a predetermined condition is satisfied. The predetermined condition may be a condition under which an amount of particulate matter that separates from a filter is larger than or equal to a predetermined separation amount as a urea water-originated deposit once accumulated in the filter separates in gaseous form. When the electronic control unit determines that the predetermined condition is satisfied, the electronic control unit may not execute a diagnosis of a malfunction in the filter based on a filter differential pressure until a predetermined period elapses from the point in time at which it is determined that the predetermined condition is satisfied.Type: GrantFiled: December 21, 2015Date of Patent: September 12, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Arifumi Matsumoto, Toru Kidokoro, Taiga Hagimoto, Makoto Ogiso, Kenji Furui
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Publication number: 20170226908Abstract: An additive amount of a reducing agent to a selective reduction-type NOx catalyst is optimized. An ammonia adsorption amount of the selective reduction-type NOx catalyst is estimated based on one or a plurality of prescribed parameters related to the ammonia adsorption amount and a specific ammonia adsorption amount that is an estimated value of the ammonia adsorption amount specified by at least one of a maximum value and a minimum value of an estimated value of the ammonia adsorption amount is estimated based on an error in the prescribed parameter, and when the specific ammonia adsorption amount is outside a target range of the ammonia adsorption amount, addition of an ammonia precursor or ammonia using an adding valve is controlled such that the specific ammonia adsorption amount returns to the target range.Type: ApplicationFiled: August 4, 2015Publication date: August 10, 2017Applicant: Toyota Jidosha Kabushiki KaishaInventors: Arifumi MATSUMOTO, Toru KIDOKORO, Taiga HAGIMOTO, Kenji FURUI, Akifumi UOZUMI
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Publication number: 20170184003Abstract: A device is provided, which makes it possible to perform a failure diagnostics for a filter more accurately even in the case of an internal combustion engine which is constructed to be capable of using both of gaseous fuel and liquid fuel. The device of the invention comprises judging means which judges any failure of the filter by comparing the added-up amount of the particulate matter contained in the exhaust gas as detected by a PM amount detecting sensor during a predetermined period and the added-up amount of the particulate matter contained in the exhaust gas as estimated by PM amount estimating means during the predetermined period, wherein the PM amount estimating means estimates the added-up amount of the particulate matter contained in the exhaust gas on the basis of the predetermined parameter and only a fuel injection amount of the liquid fuel out of a fuel injection amount of the gaseous fuel and the fuel injection amount of the liquid fuel.Type: ApplicationFiled: July 8, 2015Publication date: June 29, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki KOGO, Makoto OGISO, Taiga HAGIMOTO
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Patent number: 9677452Abstract: An object of the invention is to suppress a reduction in accuracy of abnormality diagnosis with an abnormality diagnosis device for an exhaust gas control apparatus that performs the abnormality diagnosis regarding the exhaust gas control apparatus by using the amount of NOx flowing into an SCR catalyst as a parameter.Type: GrantFiled: May 29, 2014Date of Patent: June 13, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomoyuki Kogo, Makoto Ogiso, Taiga Hagimoto, Arifumi Matsumoto, Kazuya Takaoka, Hirokazu Nishijima, Kenji Furui