Patents by Inventor Takahito ISHINO
Takahito ISHINO 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: 11964665Abstract: A vehicle speed calculating device includes a vehicle speed calculating unit configured to calculate a control vehicle speed that is acquired by estimating a vehicle body speed that is a speed at which a vehicle is actually traveling, as a state variable used to control an onboard device configured to operate to realize various functions provided in the vehicle. The vehicle speed calculating unit is configured to include an extraction function of extracting at least one wheel speed acquired from at least one wheel that is assumed to be rotating in a state in which an influence causing a difference from the vehicle body speed is likely to be small, out of wheel speeds of a plurality of wheels, and a calculation function of calculating the control vehicle speed based on the at least one wheel speed extracted by the extraction function.Type: GrantFiled: March 1, 2022Date of Patent: April 23, 2024Assignees: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi Kodera, Toru Takashima, Koichi Nishimura, Takahito Ishino
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Publication number: 20230339537Abstract: A steering control device is configured to control a steering device that changes a transmission ratio between an operation angle of an operation member and a steering angle of a steerable wheel. The steering control device includes: communication lines for transmitting vehicle speed information; and calculators communicably connected to each other and individually connected to the communication lines. Each calculator calculates the transmission ratio based on the vehicle speed information received via a corresponding one of the communication lines and determines whether the received vehicle speed information is valid.Type: ApplicationFiled: April 21, 2023Publication date: October 26, 2023Applicants: Toyota Jidosha Kabushiki Kaisha, JTEKT CORPORATIONInventors: Yosuke YAMASHITA, Masaharu YAMASHITA, Kenji SHIBATA, Koichi NISHIMURA, Takahito ISHINO, Toru TAKASHIMA, Shintaro TAKAYAMA, Yuji FUJITA, Koji ANRAKU, Kenichi ABE
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Publication number: 20230219618Abstract: A steer-by-wire steering system including a steering device including a steering motor and a controller configured to supply a steering current to the steering motor based on a steering request. The controller includes a plurality of microcomputers, a plurality of drive circuits, and a plurality of temperature sensors. When a detection temperature difference that is a difference between detection temperatures of any two of the plurality of temperature sensors is greater than a predetermined threshold, each of the plurality of microcomputers executes an independent calculation control to independently calculate and set a current limit value, which is an upper limit value of the steering current, based on a detection temperature of one of the plurality of temperature sensors corresponding to itself, irrespective of detection temperatures of one or more of the plurality of temperature sensors other than the one of the plurality of temperature sensors corresponding to itself.Type: ApplicationFiled: December 16, 2022Publication date: July 13, 2023Applicants: Toyota Jidosha Kabushiki Kaisha, JTEKT CORPORATION, DENSO CORPORATIONInventors: Takahito ISHINO, Masaharu YAMASHITA, Kenji SHIBATA, Yosuke YAMASHITA, Shintaro TAKAYAMA, Kazuaki IIDA, Ryo YAMAZAKI, Yuuta KAJISAWA, Kenichi ABE, Toyohiro HAYASHI, Nobuyori NAKAJIMA, Hiroyasu OTAKE, Kurumi TAZUKE, Hiroki TOMIZAWA
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Publication number: 20230063519Abstract: A steer-by-wire steering system for a vehicle, comprising: an operation member operable by a vehicle driver; an urging device configured to generate an urging force to urge the operation member; a steering device configured to steer a wheel; and a controller configured to control the urging device and the steering device. In a normal operation, the controller enables the wheel to be steered in accordance with an operation of the operation member and causes the urging force to function as an operation reaction force against the operation of the operation member. In an automatic steering operation in which the wheel is steered without depending on the operation of the operation member, the controller enables the operation member to be moved in accordance with steering of the wheel by the urging force and causes at least part of the urging force generated in the normal operation not to be generated.Type: ApplicationFiled: August 23, 2022Publication date: March 2, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CorporationInventors: Kosuke AKATSUKA, Yoshio Kudo, Takahito Ishino, Kenji Yoshida, Koji Anraku
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Publication number: 20220289205Abstract: A vehicle speed calculating device includes a vehicle speed calculating unit configured to calculate a control vehicle speed that is acquired by estimating a vehicle body speed that is a speed at which a vehicle is actually traveling, as a state variable used to control an onboard device configured to operate to realize various functions provided in the vehicle. The vehicle speed calculating unit is configured to include an extraction function of extracting at least one wheel speed acquired from at least one wheel that is assumed to be rotating in a state in which an influence causing a difference from the vehicle body speed is likely to be small, out of wheel speeds of a plurality of wheels, and a calculation function of calculating the control vehicle speed based on the at least one wheel speed extracted by the extraction function.Type: ApplicationFiled: March 1, 2022Publication date: September 15, 2022Applicants: JTEKT CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takashi KODERA, Toru TAKASHIMA, Koichi NISHIMURA, Takahito ISHINO
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Patent number: 11136061Abstract: A vehicle of a steer-by-wire type includes a steering wheel and a turning device configured to turn a wheel. A control device for the vehicle is configured to: calculate a target turn angle being represented as a function of a steering angle of the steering wheel, and control the turning device such that a turn angle of the wheel becomes the target turn angle; receive driver-specified information indicating a specified maximum steering angle that is a maximum value of the steering angle specified by a driver of the vehicle; and flexibly set the function such that the target turn angle calculated according to the specified maximum steering angle is equal to a predetermined maximum turn angle.Type: GrantFiled: October 9, 2019Date of Patent: October 5, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidetsugu Toyama, Osamu Yasuike, Miwanori Oikawa, Takahito Ishino
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Patent number: 11124178Abstract: An automatic tilting vehicle includes a pair of wheels that are non-steering driving wheels, a braking/driving device, a vehicle tilting device, and a control device, and the control unit calculates a target tilt angle of the vehicle for tilting the vehicle turning inward and controls the vehicle tilting device so that a tilt angle of the vehicle becomes the target tilt angle. The control unit calculates target braking/driving forces of the pair of wheels based on a braking/driving operation of a driver, corrects the target braking/driving forces so that a difference between vertical forces acting on the wheels caused by the braking/driving forces of the pair of wheels is reduced, and controls the braking/driving device such that braking/driving forces of the pair of wheels becomes the corrected target braking/driving forces.Type: GrantFiled: April 22, 2019Date of Patent: September 21, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Takahito Ishino
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Publication number: 20200180681Abstract: A vehicle of a steer-by-wire type includes a steering wheel and a turning device configured to turn a wheel. A control device for the vehicle is configured to: calculate a target turn angle being represented as a function of a steering angle of the steering wheel, and control the turning device such that a turn angle of the wheel becomes the target turn angle; receive driver-specified information indicating a specified maximum steering angle that is a maximum value of the steering angle specified by a driver of the vehicle; and flexibly set the function such that the target turn angle calculated according to the specified maximum steering angle is equal to a predetermined maximum turn angle.Type: ApplicationFiled: October 9, 2019Publication date: June 11, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hidetsugu TOYAMA, Osamu YASUIKE, Miwanori OIKAWA, Takahito ISHINO
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Patent number: 10654332Abstract: An automatic tilting vehicle comprises left and right front wheels and a rear wheel. A control unit controls a vehicle tilting device so that the tilt angle of the vehicle becomes the target tilt angle. The control device is configured to swingingly vibrates the vehicle in the lateral direction by tilting the vehicle by the vehicle tilting device, to estimate a height of the center of gravity of the vehicle based on a resonance period of swinging vibration of the vehicle, and to correct the target tilt angle such that a perpendicular passing through the estimated center of gravity passes within a range of a triangle formed by connecting grounding points of the left and right front wheels and a grounding point of the rear wheel.Type: GrantFiled: November 22, 2017Date of Patent: May 19, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshikazu Kameda, Takahito Ishino, Hirotaka Kamano, Osamu Yasuike
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Patent number: 10511244Abstract: To improve identification precision of a motor constant that controls a motor by vector control. A parameter identifier sets an offset voltage of a DC component as a first d-axis target voltage, and detects a d-axis current that flows accordingly as an offset current. The parameter identifier also sets a voltage obtained by superimposing an identification signal of a predetermined AC component on the first d-axis target voltage as a second d-axis target voltage, and detects the d-axis current that flow accordingly. The parameter identifier then identifies the motor constant using a voltage obtained by subtracting the first d-axis target voltage from the second d-axis target voltage and a current obtained by subtracting the offset current from the d-axis current as inputs.Type: GrantFiled: August 3, 2018Date of Patent: December 17, 2019Assignee: Renesas Electronics CorporationInventor: Takahito Ishino
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Publication number: 20190322271Abstract: An automatic tilting vehicle includes a pair of wheels that are non-steering driving wheels, a braking/driving device, a vehicle tilting device, and a control device, and the control unit calculates a target tilt angle of the vehicle for tilting the vehicle turning inward and controls the vehicle tilting device so that a tilt angle of the vehicle becomes the target tilt angle. The control unit calculates target braking/driving forces of the pair of wheels based on a braking/driving operation of a driver, corrects the target braking/driving forces so that a difference between vertical forces acting on the wheels caused by the braking/driving forces of the pair of wheels is reduced, and controls the braking/driving device such that braking/driving forces of the pair of wheels becomes the corrected target braking/driving forces.Type: ApplicationFiled: April 22, 2019Publication date: October 24, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Takahito ISHINO
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Patent number: 10427746Abstract: An automatic tilting vehicle includes left and right wheels rotatably supported by carriers, a vehicle tilting device, and a control unit. The vehicle tilting device includes a swing member swinging about a swing axis, an actuator that swings the swing member, a pair of tie rods pivotally connected to the swing member and the carriers. The control unit controls the actuator so that the tilt angle of the vehicle conforms to a target tilt angle and determines that the vehicle tilting device is abnormal when a relationship between the swing angular velocity of the swing member and the tilt angular velocity of the vehicle deviates from an allowable range.Type: GrantFiled: November 13, 2017Date of Patent: October 1, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hayato Yoshino, Takahito Ishino, Koichi Nishimura, Yoshikazu Kameda, Mitsuyuki Ohuchi, Osamu Yasuike, Hirotaka Kamano
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Patent number: 10340825Abstract: An initial position determination process and a rotation driving process are both attained. A motor includes a rotor having a permanent magnet with a plurality of magnetic poles and a stator having coils with a plurality of phases. A voltage signal generation part generates a voltage signal corresponding to an electric current flowing through each of the coils with the phases of the stator. A filter part includes a first filter and a second filter. The voltage signal is inputted to a comparator through the filter part. A control part controls such that the first filter whose filter constant is larger is selected when performing the initial position determination process of the rotor and the second filter whose filter constant is smaller is selected when performing the rotation driving process.Type: GrantFiled: February 21, 2018Date of Patent: July 2, 2019Assignee: RENESAS ELECTRONICS CORPORATIONInventors: Takayuki Aoki, Takahito Ishino
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Publication number: 20190115859Abstract: To improve identification precision of a motor constant that controls a motor by vector control. A parameter identifier sets an offset voltage of a DC component as a first d-axis target voltage, and detects a d-axis current that flows accordingly as an offset current. The parameter identifier also sets a voltage obtained by superimposing an identification signal of a predetermined AC component on the first d-axis target voltage as a second d-axis target voltage, and detects the d-axis current that flow accordingly. The parameter identifier then identifies the motor constant using a voltage obtained by subtracting the first d-axis target voltage from the second d-axis target voltage and a current obtained by subtracting the offset current from the d-axis current as inputs.Type: ApplicationFiled: August 3, 2018Publication date: April 18, 2019Inventor: Takahito ISHINO
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Publication number: 20180287525Abstract: An initial position determination process and a rotation driving process are both attained. A motor includes a rotor having a permanent magnet with a plurality of magnetic poles and a stator having coils with a plurality of phases. A voltage signal generation part generates a voltage signal corresponding to an electric current flowing through each of the coils with the phases of the stator. A filter part includes a first filter and a second filter. The voltage signal is inputted to a comparator through the filter part. A control part controls such that the first filter whose filter constant is larger is selected when performing the initial position determination process of the rotor and the second filter whose filter constant is smaller is selected when performing the rotation driving process.Type: ApplicationFiled: February 21, 2018Publication date: October 4, 2018Applicant: Renesas Electronics CorporationInventors: Takayuki AOKI, Takahito ISHINO
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Publication number: 20180147908Abstract: An automatic tilting vehicle comprises left and right front wheels and a rear wheel. A control unit controls a vehicle tilting device so that the tilt angle of the vehicle becomes the target tilt angle. The control device is configured to swingingly vibrates the vehicle in the lateral direction by tilting the vehicle by the vehicle tilting device, to estimate a height of the center of gravity of the vehicle based on a resonance period of swinging vibration of the vehicle, and to correct the target tilt angle such that a perpendicular passing through the estimated center of gravity passes within a range of a triangle formed by connecting grounding points of the left and right front wheels and a grounding point of the rear wheel.Type: ApplicationFiled: November 22, 2017Publication date: May 31, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshikazu KAMEDA, Takahito ISHINO, Hirotaka KAMANO, Osamu YASUIKE
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Publication number: 20180134336Abstract: An automatic tilting vehicle includes left and right wheels rotatably supported by carriers, a vehicle tilting device, and a control unit. The vehicle tilting device includes a swing member swinging about a swing axis, an actuator that swings the swing member, a pair of tie rods pivotally connected to the swing member and the carriers. The control unit controls the actuator so that the tilt angle of the vehicle conforms to a target tilt angle and determines that the vehicle tilting device is abnormal when a relationship between the swing angular velocity of the swing member and the tilt angular velocity of the vehicle deviates from an allowable range.Type: ApplicationFiled: November 13, 2017Publication date: May 17, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hayato YOSHINO, Takahito ISHINO, Koichi NISHIMURA, Yoshikazu KAMEDA, Mitsuyuki OHUCHI, Osamu YASUIKE, Hirotaka KAMANO