Patents by Inventor Kenji Miyasaka
Kenji Miyasaka 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: 11694492Abstract: A cause for a malfunction in a vehicle is identified using a preset malfunction cause identifying model indicating a relation between the cause for the malfunction identified based on a detection value of an experimental vehicle sensor such as an oil pressure sensor, which is a detection value allowing the cause for the malfunction to be identified more easily than a detection value of an in-vehicle sensor group that is the same as an in-vehicle sensor group equipped in the vehicle, and the detection value of the in-vehicle sensor group, and the detection value of the in-vehicle sensor group when the malfunction has occurred in the vehicle. Therefore, in the case where the vehicle is not equipped with the experimental vehicle sensor, it is possible to improve the accuracy of the identification of the cause for the malfunction in the vehicle.Type: GrantFiled: October 9, 2020Date of Patent: July 4, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji Miyasaka, Atsushi Tabata, Takeshi Kitahata, Koichi Okuda
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Patent number: 11565687Abstract: A control device of a hybrid vehicle includes a pressing torque applying portion configured to control the first rotating machine to output a pressing torque acting in a predetermined backlash elimination direction in backlash elimination in which one of tooth surfaces of meshing gears is pressed against the other at a meshing portion during motor running, so that the pressing torque is applied on the electric transmission mechanism. When an electrical angle of the first rotating machine is within a predetermined electrical angle range in which a cogging torque of the first rotating machine generated in accordance with rotation of the first rotating machine is equal to or greater than a predetermined torque required for the backlash elimination in the predetermined backlash elimination direction, the pressing torque applying portion makes the pressing torque smaller as compared to when the electrical angle is outside the predetermined electrical angle range.Type: GrantFiled: May 4, 2020Date of Patent: January 31, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Kitahata, Hiroki Kuwamoto, Kenji Miyasaka
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Patent number: 11433912Abstract: A vehicle failure-factor specifying apparatus includes (a) a peculiarity-presence determining portion configured to determine, based on a pre-failure driving state in a stage prior to occurrence of a certain failure in a vehicle, whether a peculiarity was present or absent in the pre-failure driving state, and (b) a failure-causing-driving state specifying portion configured, when the peculiarity was present in the pre-failure driving state, to determine whether the peculiarity present in the pre-failure driving state of the vehicle is substantially identical with a peculiarity in the pre-failure driving state of other vehicles.Type: GrantFiled: September 17, 2020Date of Patent: September 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Kitahata, Atsushi Tabata, Kenji Miyasaka, Koichi Okuda
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Patent number: 11378031Abstract: A control apparatus for a vehicle includes: a characteristic storage portion configured to store therein torque-characteristic information representing an output torque characteristic as a characteristic of an output torque of an engine of the vehicle, which has appeared in a certain control operation, such that the stored torque-characteristic information is divided into a plurality of groups corresponding to respective refueling points that provide the fuel; and a factor determination portion configured, when the output torque characteristic represented by the torque-characteristic information belonging to one of the plurality of groups and the output torque characteristic represented by the torque-characteristic information belonging to another one of the plurality of groups are different from each other and a characteristic difference therebetween is not smaller than a threshold value, to determine that the characteristic difference is caused by a difference in a property of the fuel.Type: GrantFiled: October 15, 2020Date of Patent: July 5, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Kitahata, Atsushi Tabata, Kenji Miyasaka, Kodo Nakawatari, Koichi Okuda
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Patent number: 11208091Abstract: A vehicle control device for a vehicle provides a predetermined control based on the rotational characteristic, the vehicle including a rotation lock mechanism preventing rotation of a coupling portion of the rotating member coupled to the engine on the engine side of the rotating member in at least one direction, the vehicle control device comprising: a characteristic detecting portion detecting the rotational characteristic by applying a torque to the rotating member from the electric motor to measure a twist angle of the rotating member while the rotation of the coupling portion is prevented by the rotation lock mechanism; and a characteristic correspondence control portion setting a control value related to an engine rotation speed based on the rotational characteristic detected by the characteristic detecting portion to provide the predetermined control by using the control value.Type: GrantFiled: January 9, 2019Date of Patent: December 28, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takayuki Nishida, Kenji Gotoda, Hiroki Kuwamoto, Tomoya Takeuchi, Taku Harada, Akira Nakata, Kenji Miyasaka
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Publication number: 20210131370Abstract: A control apparatus for a vehicle includes: a characteristic storage portion configured to store therein torque-characteristic information representing an output torque characteristic as a characteristic of an output torque of an engine of the vehicle, which has appeared in a certain control operation, such that the stored torque-characteristic information is divided into a plurality of groups corresponding to respective refueling points that provide the fuel; and a factor determination portion configured, when the output torque characteristic represented by the torque-characteristic information belonging to one of the plurality of groups and the output torque characteristic represented by the torque-characteristic information belonging to another one of the plurality of groups are different from each other and a characteristic difference therebetween is not smaller than a threshold value, to determine that the characteristic difference is caused by a difference in a property of the fuel.Type: ApplicationFiled: October 15, 2020Publication date: May 6, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi Kitahata, Atsushi Tabata, Kenji Miyasaka, Kodo Nakawatari, Koichi Okuda
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Publication number: 20210118250Abstract: A cause for a malfunction in a vehicle is identified using a preset malfunction cause identifying model indicating a relation between the cause for the malfunction identified based on a detection value of an experimental vehicle sensor such as an oil pressure sensor, which is a detection value allowing the cause for the malfunction to be identified more easily than a detection value of an in-vehicle sensor group that is the same as an in-vehicle sensor group equipped in the vehicle, and the detection value of the in-vehicle sensor group, and the detection value of the in-vehicle sensor group when the malfunction has occurred in the vehicle. Therefore, in the case where the vehicle is not equipped with the experimental vehicle sensor, it is possible to improve the accuracy of the identification of the cause for the malfunction in the vehicle.Type: ApplicationFiled: October 9, 2020Publication date: April 22, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji MIYASAKA, Atsushi TABATA, Takeshi KITAHATA, Koichi OKUDA
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Publication number: 20210107497Abstract: A vehicle failure-factor specifying apparatus includes (a) a peculiarity-presence determining portion configured to determine, based on a pre-failure driving state in a stage prior to occurrence of a certain failure in a vehicle, whether a peculiarity was present or absent in the pre-failure driving state, and (b) a failure-causing-driving state specifying portion configured, when the peculiarity was present in the pre-failure driving state, to determine whether the peculiarity present in the pre-failure driving state of the vehicle is substantially identical with a peculiarity in the pre-failure driving state of other vehicles.Type: ApplicationFiled: September 17, 2020Publication date: April 15, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi KITAHATA, Atsushi TABATA, Kenji MIYASAKA, Koichi OKUDA
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Publication number: 20200361442Abstract: A control device of a hybrid vehicle includes a pressing torque applying portion configured to control the first rotating machine to output a pressing torque acting in a predetermined backlash elimination direction in backlash elimination in which one of tooth surfaces of meshing gears is pressed against the other at a meshing portion during motor running, so that the pressing torque is applied on the electric transmission mechanism. When an electrical angle of the first rotating machine is within a predetermined electrical angle range in which a cogging torque of the first rotating machine generated in accordance with rotation of the first rotating machine is equal to or greater than a predetermined torque required for the backlash elimination in the predetermined backlash elimination direction, the pressing torque applying portion makes the pressing torque smaller as compared to when the electrical angle is outside the predetermined electrical angle range.Type: ApplicationFiled: May 4, 2020Publication date: November 19, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeshi KITAHATA, Hiroki KUWAMOTO, Kenji MIYASAKA
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Publication number: 20190210587Abstract: A vehicle control device for a vehicle provides a predetermined control based on the rotational characteristic, the vehicle including a rotation lock mechanism preventing rotation of a coupling portion of the rotating member coupled to the engine on the engine side of the rotating member in at least one direction, the vehicle control device comprising: a characteristic detecting portion detecting the rotational characteristic by applying a torque to the rotating member from the electric motor to measure a twist angle of the rotating member while the rotation of the coupling portion is prevented by the rotation lock mechanism; and a characteristic correspondence control portion setting a control value related to an engine rotation speed based on the rotational characteristic detected by the characteristic detecting portion to provide the predetermined control by using the control value.Type: ApplicationFiled: January 9, 2019Publication date: July 11, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takayuki NISHIDA, Kenji GOTODA, Hiroki KUWAMOTO, Tomoya TAKEUCHI, Taku HARADA, Akira NAKATA, Kenji MIYASAKA
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Patent number: 10277235Abstract: A fine-adjustment synthesizer includes a fractional phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a mixer, a baud-pass filter, and a feedback path programmable fractional frequency divider. A coarse-adjustment synthesizer includes an integer-type phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a band-pass filter, and a feedback path programmable integer frequency divider. An output of a reference signal source is input in parallel to both the fine-adjustment synthesizer and the coarse-adjustment synthesizer. An output of the frequency variable oscillator in the fine-adjustment synthesizer and an output of the frequency variable oscillator in the coarse-adjustment synthesizer are guided to the mixer and an output signal of the fine-adjustment synthesizer is guided to an output end.Type: GrantFiled: April 13, 2016Date of Patent: April 30, 2019Assignee: Mitsubishi Electric CorporationInventors: Kazuhisa Yamauchi, Nobuhiro Tokumori, Kenji Miyasaka, Takashi Fujiwara, Masaki Kawamura
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Publication number: 20180048323Abstract: A fine-adjustment synthesizer includes a fractional phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a mixer, a hand-pass filter, and a feedback path programmable fractional frequency divider. A coarse-adjustment synthesizer includes an integer-type phase-locked loop having a reference integer frequency divider, a phase comparator, a loop filter, a frequency variable oscillator, a band-pass filter, and a feedback path programmable integer frequency divider. An output of a reference signal source is input in parallel to both the fine-adjustment synthesizer and the coarse-adjustment synthesizer. An output of the frequency variable oscillator in the fine-adjustment synthesizer and an output of the frequency variable oscillator in the coarse-adjustment synthesizer are guided to the mixer and an output signal of the fine-adjustment synthesizer is guided to an output end.Type: ApplicationFiled: April 13, 2016Publication date: February 15, 2018Applicant: Mitsubishi Electric CorporationInventors: Kazuhisa YAMAUCHI, Nobuhiro TOKUMORI, Kenji MIYASAKA, Takashi FUJIWARA, Masaki KAWAMURA
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Patent number: 9694661Abstract: A hybrid vehicle includes an engine, a first motor generator, a dynamic damper, and a power split mechanism. The dynamic damper includes an output-side rotating member, a spring element, and a second motor generator connected to the output-side rotating member so as to transmit the power. The dynamic damper is configured by connecting the output-side rotating member and the second motor generator via the spring element. The power split mechanism splits a power from the engine to the first motor generator and to the output-side rotating member. The control device includes an electronic control unit. The electronic control unit configured to change execution modes of rattling noise suppression control based on a spring characteristic of the dynamic damper. The rattling noise suppression control is a control to suppress rattling noise resulting from rotational fluctuations of the engine.Type: GrantFiled: September 4, 2014Date of Patent: July 4, 2017Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenji Miyasaka, Hiroatsu Endo, Hiromichi Chuujou
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Patent number: 9096118Abstract: A drive device of a hybrid vehicle includes an engine and an electric motor acting as power sources, and further includes: a first rotating member coupled to the electric motor; a second rotating member to which power from the engine is transmitted; and a gear pair made up of helical gears formed on the first rotating member and the second rotating member to couple the first rotating member and the second rotating member in a power transmittable manner, within a case, an inner wall extending from an outer wall of the case toward an inside of the case is in the case, and an elastic member pressing the first rotating member toward the inner wall is provided in a preloaded state between the first rotating member and the inner wall.Type: GrantFiled: February 28, 2012Date of Patent: August 4, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tetsuo Hori, Hiroatsu Endo, Kenji Miyasaka
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Publication number: 20150073640Abstract: A hybrid vehicle includes an engine, a first motor generator, a dynamic damper, and a power split mechanism. The dynamic damper includes an output-side rotating member, a spring element, and a second motor generator connected to the output-side rotating member so as to transmit the power. The dynamic damper is configured by connecting the output-side rotating member and the second motor generator via the spring element. The power split mechanism splits a power from the engine to the first motor generator and to the output-side rotating member. The control device includes an electronic control unit. The electronic control unit configured to change execution modes of rattling noise suppression control based on a spring characteristic of the dynamic damper. The rattling noise suppression control is a control to suppress rattling noise resulting from rotational fluctuations of the engine.Type: ApplicationFiled: September 4, 2014Publication date: March 12, 2015Inventors: Kenji Miyasaka, Hiroatsu Endo, Hiromichi Chuujou
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Publication number: 20150024902Abstract: A drive device of a hybrid vehicle includes an engine and an electric motor acting as power sources, and further includes: a first rotating member coupled to the electric motor; a second rotating member to which power from the engine is transmitted; and a gear pair made up of helical gears formed on the first rotating member and the second rotating member to couple the first rotating member and the second rotating member in a power transmittable manner, within a case, an inner wall extending from an outer wall of the case toward an inside of the case is in the case, and an elastic member pressing the first rotating member toward the inner wall is provided in a preloaded state between the first rotating member and the inner wall.Type: ApplicationFiled: February 28, 2012Publication date: January 22, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tetsuo Hori, Hiroatsu Endo, Kenji Miyasaka
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Patent number: 8909403Abstract: A powertrain includes: an engine provided with a plurality of cylinders; a first motor generator coupled to an output shaft of the engine; and an ECU for controlling them. When misfire in the engine is detected, the output shaft of the engine is rotated by driving the first motor generator with ignition and supply of fuel to the engine being suspended.Type: GrantFiled: October 7, 2010Date of Patent: December 9, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshimitsu Yokouchi, Kenji Miyasaka, Tetsuo Hori, Hideto Watanabe
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Publication number: 20130190962Abstract: A powertrain includes: an engine provided with a plurality of cylinders; a first motor generator coupled to an output shaft of the engine; and an ECU for controlling them. When misfire in the engine is detected, the output shaft of the engine is rotated by driving the first motor generator with ignition and supply of fuel to the engine being suspended.Type: ApplicationFiled: October 7, 2010Publication date: July 25, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshimitsu Yokouchi, Kenji Miyasaka, Tetsuo Hori, Hideto Watanabe
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Patent number: 7743679Abstract: A power transmission device that can have deformation in processing suppressed. A spiral gear as a rotation member includes a disk section extending radially outwards from a boss section. The disk section includes a through hole in slit form through laser processing.Type: GrantFiled: February 22, 2006Date of Patent: June 29, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shigetsugu Iwata, Kenji Miyasaka, Katsuyuki Hojo, Yuichi Nishida, Hiroshi Mizoguchi, Naoki Kato, Hiroki Goshima
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Publication number: 20090042655Abstract: A power transmission device that can have deformation in processing suppressed. A spiral gear as a rotation member includes a disk section extending radially outwards from a boss section. The disk section includes a through hole in slit form through laser processing.Type: ApplicationFiled: February 22, 2006Publication date: February 12, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shigetsugu Iwata, Kenji Miyasaka, Katsuyuki Hojo, Yuichi Nishida, Hiroshi Mizoguchi, Naoki Kato, Hiroki Goshima