Patents by Inventor Yoshihisa UMEMURA

Yoshihisa UMEMURA 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: 20240149865
    Abstract: The hybrid vehicle includes an engine coupled to a drive shaft, a first motor that rotates the engine a second motor coupled to the drive shaft, a transmission interposed between the engine and the first motor, and the second motor, and a control device configured to execute a decrease process and an increase process. The decrease process is a process for decreasing deceleration of the hybrid vehicle by restricting fuel cut in the engine. The increase process is a process for increasing a rotational speed of the engine to a target rotational speed by power running torque of the first motor during deceleration by downshift of the transmission. The target rotational speed in the increase process is set to a lower value during execution of the decrease process than during stop of the decrease process.
    Type: Application
    Filed: September 11, 2023
    Publication date: May 9, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA
  • Publication number: 20240001906
    Abstract: A control device for a hybrid vehicle, includes a deceleration control unit configured to an engine and a motor as traveling power sources so as to control deceleration of the hybrid vehicle, a fuel cut control unit configured to restrict or permit fuel cut in the engine based on establishment or non-establishment of a predetermined condition, a turning control unit configured to execute turning control for increasing deceleration during turning higher than deceleration during straight traveling, and a deceleration limit unit configured to limit deceleration in restricting the fuel cut and in executing the turning control so as to be lower than deceleration in permitting the fuel cut and in executing the turning control.
    Type: Application
    Filed: May 31, 2023
    Publication date: January 4, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA
  • Publication number: 20240001908
    Abstract: A control device for a hybrid vehicle includes a deceleration control unit configured to an engine and a motor as traveling power sources so as to control deceleration of the hybrid vehicle, a fuel cut control unit configured to restrict or permit fuel cut in the engine based on establishment or non-establishment of a predetermined condition, a traveling mode selection unit configured to select either a first traveling mode or a second traveling mode requiring deceleration higher than deceleration of the first traveling mode, and a deceleration limit unit configured to limit deceleration in restricting the fuel cut and in selecting the second traveling mode so as to be lower than deceleration in permitting the fuel cut and in selecting the second traveling mode.
    Type: Application
    Filed: June 27, 2023
    Publication date: January 4, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA
  • Publication number: 20240001907
    Abstract: A hybrid electric vehicle includes an engine that includes a filter collecting PM from exhaust gas. A controller for the vehicle executes a driving force switching process, a motoring process, and a setting process. The driving force switching process reduces braking torque, which is generated by a drive system during deceleration of the vehicle, so that when execution of a fuel cut-off process of the engine is prohibited, the braking torque is less than when execution of the fuel cut-off process is permitted. The motoring process burns and removes PM from the filter by rotationally driving the engine using a first rotary electric machine during deceleration of the vehicle. The setting process sets a vehicle speed for permitting execution of the motoring process to be higher when execution of the fuel cut-off process is prohibited than when execution of the fuel cut-off process is permitted.
    Type: Application
    Filed: June 15, 2023
    Publication date: January 4, 2024
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA
  • Publication number: 20240001923
    Abstract: A control device for a hybrid vehicle, includes a deceleration control unit configured to an engine and a motor as traveling power sources so as to control deceleration of the hybrid vehicle, a fuel cut control unit configured to restrict or permit fuel cut in the engine based on establishment or non-establishment of a predetermined condition, a downhill control unit configured to execute downhill control for increasing deceleration during downhill traveling higher than deceleration during flat traveling, and a deceleration limit unit configured to limit deceleration in restricting the fuel cut and in executing the downhill control so as to be lower than deceleration in permitting the fuel cut and in executing the downhill control.
    Type: Application
    Filed: June 26, 2023
    Publication date: January 4, 2024
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA
  • Publication number: 20230347897
    Abstract: A controller for a vehicle is configured to control a vehicle that includes a power unit coupled to wheels. The power unit includes an engine configured to generate force by combustion of a fuel, and a regenerative braking device configured to generate electricity by force transmitted from the wheels. The controller is configured to execute a deceleration assist control that increases a braking torque generated by the power unit during a deceleration of the vehicle when the vehicle is predicted to decelerate, compared to when the vehicle is not predicted to decelerate. The control is also configured to execute a braking torque increase prohibition process that prohibits an increase in the braking torque in the deceleration assist control when a fuel cutoff process of the engine is prohibited.
    Type: Application
    Filed: April 26, 2023
    Publication date: November 2, 2023
    Inventors: Yoshihisa UMEMURA, Suguru KUMAZAWA, Yasutaka TSUCHIDA