Patents by Inventor Takanobu NASU

Takanobu NASU 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).

  • Publication number: 20220371582
    Abstract: A moving object that travels from a current position toward a target position includes a first section candidate searching unit configured to search for a plurality of first section candidates in which the moving object is capable of traveling from the current position, a second section candidate searching unit configured to, for each ending point of the first section candidates, search for a plurality of second section candidates in which the moving object is capable of traveling from the ending points of the first section candidates, an obstacle position recognition unit configured to detect a position of an obstacle around the moving object, and a route decision unit configured to decide a first section and a second section used as a traveling route of the moving object from the plurality of first section candidates and the plurality of second section candidates.
    Type: Application
    Filed: May 11, 2022
    Publication date: November 24, 2022
    Inventors: Daisuke Sato, Takanobu Nasu, Toshihiro Wakita
  • Patent number: 11214308
    Abstract: A drive force control system to increase a yaw rate greater than the yaw rate achieved by rotating a steering wheel to a maximum angle. A target yaw rate is calculated based on a steering angle of the steering wheel. A first predetermined torque and a second predetermined torque are calculated based on a difference between the target yaw rate and an actual yaw rate. When the steering angle of the steering wheel exceeds a first predetermined angle, a first correction torque to correct the first predetermined torque and a second correction torque to correct the second predetermined torque are calculated n accordance with the steering torque.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: January 4, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono, Hidekazu Sasaki
  • Patent number: 10933878
    Abstract: A drive force control system to improve efficiency of a vehicle by controlling motors connected to drive wheels. A controller is configured to: calculate a total required torque of the drive unit; obtain combinations of a first interim torque of a first motor and a second interim torque of a second motor to achieve the total required torque; select a combination of the first interim torque and the second interim torque to minimize an output of a power source; and output the first interim torque of the first motor and the second interim torque of the second motor based on the selected combination.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: March 2, 2021
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono
  • Patent number: 10787167
    Abstract: A drive force control system configured to achieve a yaw rate required by a driver. A first target yaw rate is calculated based on a steering angle, and a second target yaw rate is calculated based on a steering torque. A first target torque of a right wheel and a second target torque of a left wheel are calculated based on a first difference between the first target yaw rate and an actual yaw rate. the first target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a third target torque, and the second target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a fourth target torque. A controller transmit signals to the drive unit to achieve the third target torque and to achieve the fourth target torque.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: September 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono, Hidekazu Sasaki
  • Publication number: 20200283066
    Abstract: A drive force control system to increase a yaw rate greater than the yaw rate achieved by rotating a steering wheel to a maximum angle. A target yaw rate is calculated based on a steering angle of the steering wheel. A first predetermined torque and a second predetermined torque are calculated based on a difference between the target yaw rate and an actual yaw rate. When the steering angle of the steering wheel exceeds a first predetermined angle, a first correction torque to correct the first predetermined torque and a second correction torque to correct the second predetermined torque are calculated n accordance with the steering torque.
    Type: Application
    Filed: May 22, 2020
    Publication date: September 10, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu NASU, Hiroshi ISONO, Hidekazu SASAKI
  • Patent number: 10696325
    Abstract: A drive force control system to increase a yaw rate greater than the yaw rate achieved by rotating a steering wheel to a maximum angle. A target yaw rate is calculated based on a steering angle of the steering wheel. A first predetermined torque and a second predetermined torque are calculated based on a difference between the target yaw rate and an actual yaw rate. When the steering angle of the steering wheel exceeds a first predetermined angle, a first correction torque to correct the first predetermined torque and a second correction torque to correct the second predetermined torque are calculated in accordance with the steering torque.
    Type: Grant
    Filed: February 22, 2018
    Date of Patent: June 30, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono, Hidekazu Sasaki
  • Patent number: 10654483
    Abstract: A drive force control system appropriately controls motors each connected to a corresponding one of drive wheels, so that a vehicle can be propelled with high efficiency. First motor and second motors are controlled in such a manner that a sum of torques transmitted to a right front wheel and a left rear wheel equals to a total value of required torques of the right front wheel and the left rear wheel. A target torque of the first motor and a target torque of the second motor achieving a smallest amount of power output from an electrical power source, for the output torques from the first motor and the second motor are calculated. A torque is generated by the first motor based on the target torque of the first motor calculated, and a torque is generated by the second motor based on the target torque of the second motor calculated.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: May 19, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono
  • Patent number: 10611260
    Abstract: A drive force control system that ensures a running stability and a driving performance of a vehicle even in the event of failure of one of motors. The drive force control system determines that one of the right motor and the left motor cannot generate a required torque due to failure. In the event of failure of any one of the motors, the drive force control system generates a torque by the other motor working properly, and controls the torque transmitting capacity of the clutch in such a manner as to deliver the output torque of the motor working properly to the wheel coupled to the faulty motor.
    Type: Grant
    Filed: April 19, 2018
    Date of Patent: April 7, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono
  • Patent number: 10279812
    Abstract: A driving force control system for a vehicle is provided to control an output torque of a prime mover and a torque split ratio to right and left wheels to improve stability of the vehicle. A controller is calculates target torques delivered to the right wheel and the left wheel based on a required drive torque and data relating to an attitude of the vehicle, and corrects the target torques based on slip ratios of the wheels. The drive motor is control based on a first current value calculated based on a total torque of the corrected target torques to be delivered the wheels, and the differential motor is controlled based on a second current value calculated based on a difference between the corrected target torques to be delivered to the wheels.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: May 7, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroshi Isono, Takanobu Nasu
  • Patent number: 10221931
    Abstract: A driving force control system for a vehicle is provided to control a torque vectoring device is provided. A controller is configured to bring the torque vectoring device into a preparatory state in which the differential torque and the differential limit torque are equalized to each other when shifting the operating mode between the differential mode and the differential limit mode, and to shift the operating mode of the torque vectoring device by gradually reducing a difference between the differential torque and the differential limit torque.
    Type: Grant
    Filed: May 1, 2017
    Date of Patent: March 5, 2019
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Junya Oota, Hiroshi Isono
  • Publication number: 20180334053
    Abstract: A drive force control system that ensures a running stability and a driving performance of a vehicle even in the event of failure of one of motors. The drive force control system determines that one of the right motor and the left motor cannot generate a required torque due to failure. In the event of failure of any one of the motors, the drive force control system generates a torque by the other motor working properly, and controls the torque transmitting capacity of the clutch in such a manner as to deliver the output torque of the motor working properly to the wheel coupled to the faulty motor.
    Type: Application
    Filed: April 19, 2018
    Publication date: November 22, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu NASU, Hiroshi ISONO
  • Publication number: 20180237004
    Abstract: A drive force control system configured to achieve a yaw rate required by a driver. A first target yaw rate is calculated based on a steering angle, and a second target yaw rate is calculated based on a steering torque. A first target torque of a right wheel and a second target torque of a left wheel are calculated based on a first difference between the first target yaw rate and an actual yaw rate. the first target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a third target torque, and the second target torque is corrected based on the second target yaw rate and the actual yaw rate to obtain a fourth target torque. A controller transmit signals to the drive unit to achieve the third target torque and to achieve the fourth target torque.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 23, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu NASU, Hiroshi ISONO, Hidekazu SASAKI
  • Publication number: 20180237015
    Abstract: A drive force control system to improve efficiency of a vehicle by controlling motors connected to drive wheels. A controller is configured to: calculate a total required torque of the drive unit; obtain combinations of a first interim torque of a first motor and a second interim torque of a second motor to achieve the total required torque; select a combination of the first interim torque and the second interim torque to minimize an output of a power source; and output the first interim torque of the first motor and the second interim torque of the second motor based on the selected combination.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu NASU, Hiroshi ISONO
  • Publication number: 20180237064
    Abstract: A drive force control system to increase a yaw rate greater than the yaw rate achieved by rotating a steering wheel to a maximum angle. A target yaw rate is calculated based on a steering angle of the steering wheel. A first predetermined torque and a second predetermined torque are calculated based on a difference between the target yaw rate and an actual yaw rate. When the steering angle of the steering wheel exceeds a first predetermined angle, a first correction torque to correct the first predetermined torque and a second correction torque to correct the second predetermined torque are calculated in accordance with the steering torque.
    Type: Application
    Filed: February 22, 2018
    Publication date: August 23, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu Nasu, Hiroshi Isono, Hidekazu Sasaki
  • Publication number: 20180237014
    Abstract: A drive force control system appropriately controls motors each connected to a corresponding one of drive wheels, so that a vehicle can be propelled with high efficiency. First motor and second motors are controlled in such a manner that a sum of torques transmitted to a right front wheel and a left rear wheel equals to a total value of required torques of the right front wheel and the left rear wheel. A target torque of the first motor and a target torque of the second motor achieving a smallest amount of power output from an electrical power source, for the output torques from the first motor and the second motor are calculated. A torque is generated by the first motor based on the target torque of the first motor calculated, and a torque is generated by the second motor based on the target torque of the second motor calculated.
    Type: Application
    Filed: February 21, 2018
    Publication date: August 23, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takanobu NASU, Hiroshi ISONO
  • Publication number: 20170328461
    Abstract: A driving force control system for a vehicle is provided to control a torque vectoring device is provided. A controller is configured to bring the torque vectoring device into a preparatory state in which the differential torque and the differential limit torque are equalized to each other when shifting the operating mode between the differential mode and the differential limit mode, and to shift the operating mode of the torque vectoring device by gradually reducing a difference between the differential torque and the differential limit torque.
    Type: Application
    Filed: May 1, 2017
    Publication date: November 16, 2017
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Takanobu NASU, Junya Oota, Hiroshi Isono
  • Publication number: 20170183008
    Abstract: A driving force control system for a vehicle is provided to control an output torque of a prime mover and a torque split ratio to right and left wheels to improve stability of the vehicle. A controller is calculates target torques delivered to the right wheel and the left wheel based on a required drive torque and data relating to an attitude of the vehicle, and corrects the target torques based on slip ratios of the wheels. The drive motor is control based on a first current value calculated based on a total torque of the corrected target torques to be delivered the wheels, and the differential motor is controlled based on a second current value calculated based on a difference between the corrected target torques to be delivered to the wheels.
    Type: Application
    Filed: December 9, 2016
    Publication date: June 29, 2017
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hiroshi ISONO, Takanobu NASU