Patents by Inventor Takahiro Shiina
Takahiro Shiina 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: 20230349377Abstract: A pump device, that supplies a liquid reserved in a reservoir to a first liquid supply destination and a second liquid supply destination, includes: a first pump whose suction port and discharge port are not switched between at forward rotation and at reverse rotation; a second pump whose suction port and discharge port are switched each other between at forward rotation and at reverse rotation; a power source that optionally switches a rotation direction of the power source; a shaft member that is rotated by a driving force from the power source; and a control device that controls at least a rotation direction of the power source. Further, the first pump and the second pump are provided on the shaft member, the first pump is connected to the first liquid supply destination, and the second pump is connected to the second liquid supply destination.Type: ApplicationFiled: April 13, 2023Publication date: November 2, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoto ONODA, Takahiro SHIINA, Hideaki KOMADA
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Patent number: 11279218Abstract: A transaxle includes a planetary gear reducer and a differential device. The planetary gear reducer includes a stepped pinion, a first needle bearing, a second needle bearing, and a carrier. The stepped pinion includes a pinion shaft with which a large diameter pinion and a small diameter pinion are integrated. The first needle bearing is fitted to a part of the pinion shaft outside the large diameter pinion. The second needle bearing is fitted to a part of the pinion shaft outside the small diameter pinion. The carrier is configured to support the stepped pinion via the first needle bearing and the second needle bearing such that the stepped pinion is rotatable with respect to the carrier, and to couple the stepped pinion and the differential device.Type: GrantFiled: January 6, 2021Date of Patent: March 22, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akira Hibino, Takahiro Shiina
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Publication number: 20210213819Abstract: A transaxle includes a planetary gear reducer and a differential device. The planetary gear reducer includes a stepped pinion, a first needle bearing, a second needle bearing, and a carrier. The stepped pinion includes a pinion shaft with which a large diameter pinion and a small diameter pinion are integrated. The first needle bearing is fitted to a part of the pinion shaft outside the large diameter pinion. The second needle bearing is fitted to a part of the pinion shaft outside the small diameter pinion. The carrier is configured to support the stepped pinion via the first needle bearing and the second needle bearing such that the stepped pinion is rotatable with respect to the carrier, and to couple the stepped pinion and the differential device.Type: ApplicationFiled: January 6, 2021Publication date: July 15, 2021Applicant: Toyota Jidosha Kabushiki KaishaInventors: Akira Hibino, Takahiro Shiina
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Patent number: 10641555Abstract: A heat exchanger for a vehicle is mounted in a vehicle having a power train through which an engine coolant, an engine oil and a transmission oil flow and in which a flow rate of the engine oil and a flow rate of the transmission oil are different from each other. A first flow passage for causing the engine coolant to flow, a second flow passage for causing the engine oil to flow, and a third flow passage for causing the transmission oil to flow are formed through lamination of a plurality of plates. The heat exchanger includes a region where the first flow passage is adjacent only to that one of the second flow passage and the third flow passage through which a fluid flows at lower flow rate.Type: GrantFiled: August 25, 2017Date of Patent: May 5, 2020Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, MAHLE Filter Systems Japan CorporationInventors: Daisuke Tokozakura, Takahiro Shiina, Satoshi Tominaga, Naoki Ooi, Katsuhiro Isoda
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Patent number: 10519856Abstract: A power train includes: an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.Type: GrantFiled: February 12, 2018Date of Patent: December 31, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi Tominaga, Daisuke Tokozakura, Takahiro Shiina
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Patent number: 10483897Abstract: A switched reluctance motor system includes a switched reluctance motor, a rotor including a plurality of salient poles, a stator including a plurality of salient poles, coils of three phases wound around the salient poles of the stator, and an electronic control unit. The electronic control unit is configured to drive the switched reluctance motor in a pole configuration pattern of NSNSNS in which the salient poles of the stator that have different polarities are alternately arranged. The electronic control unit is configured to perform current waveform control when an excitation sound frequency of a given order coincides with a resonance frequency of the switched reluctance motor.Type: GrantFiled: April 19, 2018Date of Patent: November 19, 2019Assignees: TOYOTA JIDOSHA KABUSHII KAISHA, Tokyo University of Science FoundationInventors: Junichi Deguchi, Takahiro Shiina, Kensuke Yoshizue, Nobukazu Hoshi, Yusuke Kobayashi, Yosuke Murakami, Tomoya Abe
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Patent number: 10458489Abstract: The selectable one-way clutch includes a pocket plate, a notch plate, a cover plate, and plate-like struts. A one end portion of each strut is provided with an engagement surface and a projecting portion. Each strut comes into an erect state in which the engagement surface of the strut erects from the other surface of the cover plate toward the notch plate side. The selectable one-way clutch moves the notch plate in the axial direction to change a distance in the axial direction between the pocket plate and the notch plate, thereby carrying out switching between an out-of-engagement state in which the erecting struts cannot contact with the notches and a one-way clutch state in which the erecting struts can contact with the notches.Type: GrantFiled: March 6, 2018Date of Patent: October 29, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Shibata, Hiroyuki Shioiri, Mitsuaki Tomita, Shotaro Kato, Yuki Kurosaki, Takahiro Shiina
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Patent number: 10443703Abstract: A lubrication control device for a transmission includes an oil pump, a heat exchanger, an oil quantity control valve, a first bypass oil passage, and an electronic control unit. The heat exchanger is connected between the oil pump and a lubricated portion of the transmission. The oil quantity control valve includes an inflow port, a supply port, and a discharge port. The supply port is connected to the heat exchanger. The oil quantity control valve is configured to control a supply oil quantity as a flow rate of the oil flowing from the inflow port to the supply port and discharge a residue of the oil from the discharge port. The first bypass oil passage is connected to the discharge port. The electronic control unit is configured to adjust the oil quantity control valve such that the supply oil quantity increases as a temperature of the oil increases.Type: GrantFiled: August 20, 2015Date of Patent: October 15, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina, Satoshi Tominaga
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Patent number: 10442285Abstract: A cooling apparatus for a hybrid vehicle is provided with an oil circulating circuit supplying oil discharged from an electric oil pump to a first motor, a second motor, an inverter, and a lubrication-required part, and the oil circulating circuit includes: a first circuit supplying the oil that is discharged from the electric oil pump, and is cooled by an HV radiator to the inverter, the first motor, and the second motor; and a second circuit supplying the oil that is discharged from the electric oil pump without being cooled by the HV radiator to the lubrication-required part.Type: GrantFiled: November 21, 2016Date of Patent: October 15, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
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Patent number: 10399428Abstract: A vehicle includes an engine, a generator, and a motor. The engine burns a gaseous mixture in a cylinder to output a drive force. The generator generates electricity by being rotated by the drive force outputted from the engine. The motor drives by utilizing electric power generated by the generator or electric power that has accumulated in a battery charged with electric power generated by the generator, and the motor thereby outputs a vehicle-running drive force. A case covering the motor is of larger diameter than a case covering a differential. The motor has an output shaft outputting the vehicle-running drive force, and has the output shaft disposed parallel to a vehicle width direction. The generator is disposed such that part of the generator overlaps an upper section of the case covering the differential.Type: GrantFiled: February 7, 2018Date of Patent: September 3, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tadashi Fujiyoshi, Nobuki Kawamoto, Yukio Koseki, Takahiro Shiina, Hideaki Komada
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Patent number: 10287964Abstract: An cooling system including an oil circulation circuit includes a first circuit including an electric oil pump that discharges oil as a coolant to be supplied to an inverter and respective motors, and an HV radiator that cools the oil to be supplied to the inverter and the respective motors, and a second circuit including a mechanical oil pump that discharges the oil to be supplied to a lubrication-required part without passing through the HV radiator.Type: GrantFiled: December 21, 2016Date of Patent: May 14, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
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Patent number: 10234016Abstract: A heat exchanging device includes: a heat exchanger configured to perform heat exchange between first operating oil used in an engine and second operating oil used in a fluid transmitting device and an automatic transmission; and a heat exchanging amount decreasing unit configured to, when a temperature of the second operating oil is lower than a predetermined temperature at which it is allowed to engage a lock-up mechanism, decrease a flow amount of at least one of the first and second operating oil flowing in the heat exchanger as compared to a case in which the temperature of the second operating oil is not lower than the predetermined temperature.Type: GrantFiled: June 29, 2016Date of Patent: March 19, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takahiro Shiina, Daisuke Tokozakura, Kazuya Arakawa
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Patent number: 10184733Abstract: A heat exchanger includes: a first flow passage where first liquid flows; a second flow passage where second liquid flows; and a heat exchanger main body configured to exchange heat between the first liquid and the second liquid. The heat exchanger main body includes a cross-sectional area adjuster configured to change a flow passage cross-sectional area of at least one of the first flow passage and the second flow passage by thermal deformation. The cross-sectional area adjuster adjusts a value of the flow passage cross-sectional area in a low temperature range to be larger than a value of the flow passage cross-sectional area in a high temperature range.Type: GrantFiled: December 27, 2015Date of Patent: January 22, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi Tominaga, Daisuke Tokozakura, Takahiro Shiina, Kazuya Arakawa, Hitoshi Takayama, Keisuke Ichige, Masanori Iritani
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Publication number: 20180309401Abstract: A switched reluctance motor system includes a switched reluctance motor, a rotor including a plurality of salient poles, a stator including a plurality of salient poles, coils of three phases wound around the salient poles of the stator, and an electronic control unit. The electronic control unit is configured to drive the switched reluctance motor in a pole configuration pattern of NSNSNS in which the salient poles of the stator that have different polarities are alternately arranged. The electronic control unit is configured to perform current waveform control when an excitation sound frequency of a given order coincides with a resonance frequency of the switched reluctance motor.Type: ApplicationFiled: April 19, 2018Publication date: October 25, 2018Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, Tokyo University of Science FoundationInventors: Junichi DEGUCHI, Takahiro SHIINA, Kensuke YOSHIZUE, Nobukazu HOSHI, Yusuke KOBAYASHI, Yosuke MURAKAMI, Tomoya ABE
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Patent number: 10107382Abstract: A vehicular drive system includes an engine having a first oil, a transmission having a second oil, and a heat exchanger 4 that exchanges heat between the first oil and the second oil. The magnitude of the amount of reduction of loss torque in the transmission per unit amount of reduction of the kinetic viscosity of the second oil is larger than the magnitude of the amount of increase of loss torque in the engine per unit amount increase of the kinetic viscosity of the first oil.Type: GrantFiled: June 23, 2015Date of Patent: October 23, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina
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Publication number: 20180259012Abstract: The selectable one-way clutch includes a pocket plate, a notch plate, a cover plate, and plate-like struts. A one end portion of each strut is provided with an engagement surface and a projecting portion. Each strut comes into an erect state in which the engagement surface of the strut erects from the other surface of the cover plate toward the notch plate side. The selectable one-way clutch moves the notch plate in the axial direction to change a distance in the axial direction between the pocket plate and the notch plate, thereby carrying out switching between an out-of-engagement state in which the erecting struts cannot contact with the notches and a one-way clutch state in which the erecting struts can contact with the notches.Type: ApplicationFiled: March 6, 2018Publication date: September 13, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki SHIBATA, Hiroyuki SHIOIRI, Mitsuaki TOMITA, Shotaro KATO, Yuki KUROSAKI, Takahiro SHIINA
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Patent number: 10056859Abstract: A control device for a switched reluctance motor includes an inverter having a switching circuit that switches a magnetic pole to provide a first winding pattern or a second winding pattern. With respect to a boundary dividing a driving range of the switched reluctance motor into two ranges, the control device performs switching to the first winding pattern when the torque and the rotational speed are located in the first range on the low load side, performs switching to the second winding pattern when the torque and the rotational speed are located in the second range, allows switching of the magnetic pole in a case where a current of the phase whose magnetic pole is to be switched among the three-phase coils is 0, and prohibits switching of the magnetic pole in a case where the current of the phase whose magnetic pole is to be switched is not 0.Type: GrantFiled: November 1, 2017Date of Patent: August 21, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junichi Deguchi, Takahiro Shiina, Kensuke Yoshizue
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Publication number: 20180230901Abstract: A power train includes an engine including an engine case; a transmission including a transmission case that is fastened to the engine case; an electric motor provided inside the transmission case; and a heat insulator provided between the engine case and the transmission case, and being lower than thermal conductivity of the engine case and thermal conductivity of the transmission case.Type: ApplicationFiled: February 12, 2018Publication date: August 16, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Satoshi TOMINAGA, Daisuke Tokozakura, Takahiro Shiina
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Publication number: 20180222307Abstract: A vehicle includes an engine, a generator, and a motor. The engine burns a gaseous mixture in a cylinder to output a drive force. The generator generates electricity by being rotated by the drive force outputted from the engine. The motor drives by utilizing electric power generated by the generator or electric power that has accumulated in a battery charged with electric power generated by the generator, and the motor thereby outputs a vehicle-running drive force. A case covering the motor is of larger diameter than a case covering a differential. The motor has an output shaft outputting the vehicle-running drive force, and has the output shaft disposed parallel to a vehicle width direction. The generator is disposed such that part of the generator overlaps an upper section of the case covering the differential.Type: ApplicationFiled: February 7, 2018Publication date: August 9, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tadashi FUJIYOSHI, Nobuki KAWAMOTO, Yukio KOSEKI, Takahiro SHIINA, Hideaki KOMADA
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Patent number: 10018102Abstract: A heat exchanger includes a plurality of plates that is stacked together to constitute first flow passages, second flow passage, third flow passage, fourth flow passage and fifth flow passage. An engine coolant flows through the first flow passages. An engine oil flows through the second flow passages and fourth flow passages. A transmission oil flows through the third flow passages and fifth flow passages. Triple-flow-passage arrangement layers in each of which each first, second, and third flow passages are disposed, and dual-flow-passage arrangement layers in each of which each fourth and fifth flow passages are disposed are alternately arranged such that flow passages of each same type are not overlaid with one another in a stacking direction of the plates.Type: GrantFiled: July 26, 2016Date of Patent: July 10, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daisuke Tokozakura, Kazuya Arakawa, Takahiro Shiina