Patents by Inventor Takahisa Kurosawa

Takahisa Kurosawa 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).

  • Patent number: 11932138
    Abstract: An electric vehicle control method for braking of an electric vehicle applies a front braking torque to a front drive motor that drives a front wheel and applies a rear braking torque to a rear drive motor that drives a rear wheel. The method includes: during the braking, executing a torque limiting process (process B, process C, front braking torque control) that reduces the front braking torque and the rear braking torque when a slip of the front wheel is detected; and executing a distribution torque changing process that increases the front braking torque while maintaining a sum of the front braking torque and the rear braking torque when a slip of the rear wheel is detected.
    Type: Grant
    Filed: October 28, 2020
    Date of Patent: March 19, 2024
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takahisa Kurosawa, Yohei Nakamura, Masahito Taira
  • Publication number: 20230347748
    Abstract: An electric vehicle control method for braking of an electric vehicle applies a front braking torque to a front drive motor that drives a front wheel and applies a rear braking torque to a rear drive motor that drives a rear wheel. The method includes: during the braking, executing a torque limiting process (process B, process C, front braking torque control) that reduces the front braking torque and the rear braking torque when a slip of the front wheel is detected; and executing a distribution torque changing process that increases the front braking torque while maintaining a sum of the front braking torque and the rear braking torque when a slip of the rear wheel is detected.
    Type: Application
    Filed: October 28, 2020
    Publication date: November 2, 2023
    Inventors: Takahisa Kurosawa, Yohei Nakamura, Masahito Taira
  • Patent number: 11465604
    Abstract: In a vehicle control method, when drive force which a second electric motor is requested to output increases in a state where an internal combustion engine is stopped, drive force which the second electric motor outputs by using electric power supplied by a battery is limited to a lower level than maximum drive force determined from electric power which can be supplied by the battery to drive an electric-powered vehicle. Then, the drive force which the second electric motor outputs by using the electric power supplied by the battery is increased over time in a period from when the second electric motor outputs the drive force limited to the lower level to when the internal combustion engine is fired up and a first electric motor starts power generation.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: October 11, 2022
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Takahisa Kurosawa, Satomi Eto
  • Publication number: 20200339097
    Abstract: In a vehicle control method, when drive force which a second electric motor is requested to output increases in a state where an internal combustion engine is stopped, drive force which the second electric motor outputs by using electric power supplied by a battery is limited to a lower level than maximum drive force determined from electric power which can be supplied by the battery to drive an electric-powered vehicle. Then, the drive force which the second electric motor outputs by using the electric power supplied by the battery is increased over time in a period from when the second electric motor outputs the drive force limited to the lower level to when the internal combustion engine is fired up and a first electric motor starts power generation.
    Type: Application
    Filed: December 15, 2017
    Publication date: October 29, 2020
    Inventors: Takahisa KUROSAWA, Satomi ETO
  • Patent number: 10486546
    Abstract: A torque control method for controlling torque of a motor, comprises detecting request of speed control requested from a driver by using a sensor, calculating a request torque based on the request, performing, controlling torque generated at the motor based on the request torque, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero.
    Type: Grant
    Filed: July 15, 2016
    Date of Patent: November 26, 2019
    Assignee: NISSAN MOTOR CO., LTD.
    Inventors: Takahisa Kurosawa, Yohei Nakamura
  • Publication number: 20190241075
    Abstract: A torque control method for controlling torque of a motor, comprises detecting request of speed control requested from a driver by using a sensor, calculating a request torque based on the request, performing, controlling torque generated at the motor based on the request torque, when the request torque is smaller than a predetermined torque threshold value, a coast traveling control for setting the request torque to zero and controlling the motor based on the request torque which is set to zero.
    Type: Application
    Filed: July 15, 2016
    Publication date: August 8, 2019
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Takahisa KUROSAWA, Yohei NAKAMURA