Patents by Inventor Tadaaki Watanabe

Tadaaki Watanabe 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: 12012003
    Abstract: An apparatus including a transmission mechanism in a power transfer path between a drive source and wheels; an oil pressure control device supplying lubricating oil to the transmission mechanism; and a control part outputting an electrical instruction to increase a flow rate of the supplied lubricating. When the control part outputs an electrical instruction to the oil pressure control device to increase a flow rate of lubricating oil supplied to the transmission mechanism, and determines that the flow rate of lubricating oil supplied to the transmission mechanism from the oil pressure control device does not increase as indicated by the electrical instruction (time t1), the control part considers that the oil pressure control device is in an abnormal state, and can impose a limitation that an absolute value of torque of the transmission mechanism transferred between the wheels and the drive source be reduced (time t1-t5).
    Type: Grant
    Filed: January 30, 2020
    Date of Patent: June 18, 2024
    Assignee: AISIN CORPORATION
    Inventors: Takahiro Suzuki, Tadaaki Watanabe
  • Publication number: 20220089013
    Abstract: An apparatus including a transmission mechanism in a power transfer path between a drive source and wheels; an oil pressure control device supplying lubricating oil to the transmission mechanism; and a control part outputting an electrical instruction to increase a flow rate of the supplied lubricating. When the control part outputs an electrical instruction to the oil pressure control device to increase a flow rate of lubricating oil supplied to the transmission mechanism, and determines that the flow rate of lubricating oil supplied to the transmission mechanism from the oil pressure control device does not increase as indicated by the electrical instruction (time t1), the control part considers that the oil pressure control device is in an abnormal state, and can impose a limitation that an absolute value of torque of the transmission mechanism transferred between the wheels and the drive source be reduced (time t1-t5).
    Type: Application
    Filed: January 30, 2020
    Publication date: March 24, 2022
    Applicant: AISIN CORPORATION
    Inventors: Takahiro SUZUKI, Tadaaki WATANABE
  • Publication number: 20220063588
    Abstract: There are included a transmission mechanism that includes an input member driven by an engine and an output member drive-coupled to wheels and that can change a gear ratio between the input member and the output member; a clutch SSC that is interposed between an output shaft of the engine and the input member and can connect and disconnect power transmission between the output shaft of the engine and the input member of the transmission mechanism; and a control part that controls engagement and disengagement of the clutch SSC by electrical instructions. When the control part determines that a drag state of the clutch SSC has occurred (t2) when the control part outputs an electrical instruction to bring the clutch SSC into a disengaged state, the control part outputs an electrical instruction to bring the clutch SSC into a completely engaged state (t3 to t4).
    Type: Application
    Filed: January 23, 2020
    Publication date: March 3, 2022
    Applicant: AISIN CORPORATION
    Inventors: Takahiro SUZUKI, Tadaaki WATANABE
  • Patent number: 10815925
    Abstract: A vehicle includes two accelerator position sensors and an electronic control unit. The two accelerator position sensors are configured to detect accelerator operation amounts. The electronic control unit is configured to perform drive control based on the accelerator operation amounts from the two accelerator position sensors. The electronic control unit is configured to, when failure occurs in one accelerator position sensor out of the two accelerator position sensors, perform the drive control based on the accelerator operation amount from the other accelerator position sensor out of the two accelerator position sensors, the accelerator operation amount being restricted by an accelerator operation amount upper limit that has a tendency of becoming larger as the vehicle speed is larger.
    Type: Grant
    Filed: April 6, 2018
    Date of Patent: October 27, 2020
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kenji Uchida, Tadaaki Watanabe
  • Patent number: 10479365
    Abstract: An electronic control unit controls a motor so that a torque applied to an input shaft does not exceed an upper limit torque. The electronic control unit sets so as to restrict the upper limit torque from a first torque to a second torque smaller than the first torque, and then return the upper limit torque to the first torque more gradually when a first condition that a driver is assumed to have felt a decrease in driving force output to driving wheels is met before the upper limit torque is returned than when the first condition is not met.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: November 19, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Yukimasa Nishimura, Yoshizo Akita, Tadaaki Watanabe
  • Patent number: 10449952
    Abstract: A hybrid vehicle is equipped with a drive unit, and an automatic transmission. The automatic transmission includes engagement elements that can transmit power between the drive unit and driving wheels. The drive unit includes an engine, a first motor generator, a second motor generator, and a planetary gear mechanism. The hybrid vehicle is further equipped with a mechanical oil pump and an electrical oil pump, and a controller. The controller continues operating the electrical oil pump while the internal combustion engine is not in operation after the internal combustion engine is stopped as a result of a system stop operation by a user while the vehicle is running at a vehicle speed equal to or higher than a predetermined value.
    Type: Grant
    Filed: November 22, 2017
    Date of Patent: October 22, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin AW Co., Ltd.
    Inventors: Kenji Uchida, Yoshizo Akita, Tadaaki Watanabe, Mitsuru Maeda
  • Publication number: 20180298841
    Abstract: A vehicle includes two accelerator position sensors and an electronic control unit. The two accelerator position sensors are configured to detect accelerator operation amounts. The electronic control unit is configured to perform drive control based on the accelerator operation amounts from the two accelerator position sensors. The electronic control unit is configured to, when failure occurs in one accelerator position sensor out of the two accelerator position sensors, perform the drive control based on the accelerator operation amount from the other accelerator position sensor out of the two accelerator position sensors, the accelerator operation amount being restricted by an accelerator operation amount upper limit that has a tendency of becoming larger as the vehicle speed is larger.
    Type: Application
    Filed: April 6, 2018
    Publication date: October 18, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kenji UCHIDA, Tadaaki WATANABE
  • Publication number: 20180201267
    Abstract: An electronic control unit controls a motor so that a torque applied to an input shaft does not exceed an upper limit torque. The electronic control unit sets so as to restrict the upper limit torque from a first torque to a second torque smaller than the first torque, and then return the upper limit torque to the first torque more gradually when a first condition that a driver is assumed to have felt a decrease in driving force output to driving wheels is met before the upper limit torque is returned than when the first condition is not met.
    Type: Application
    Filed: January 16, 2018
    Publication date: July 19, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Yukimasa NlSHIMURA, Yoshizo AKITA, Tadaaki WATANABE
  • Publication number: 20180170361
    Abstract: A hybrid vehicle is equipped with a drive unit, and an automatic transmission. The automatic transmission includes engagement elements that can transmit power between the drive unit and driving wheels. The drive unit includes an engine, a first motor generator, a second motor generator, and a planetary gear mechanism. The hybrid vehicle is further equipped with a mechanical oil pump and an electrical oil pump, and a controller. The controller continues operating the electrical oil pump while the internal combustion engine is not in operation after the internal combustion engine is stopped as a result of a system stop operation by a user while the vehicle is running at a vehicle speed equal to or higher than a predetermined value.
    Type: Application
    Filed: November 22, 2017
    Publication date: June 21, 2018
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.
    Inventors: Kenji Uchida, Yoshizo Akita, Tadaaki Watanabe, Mitsuru Maeda
  • Patent number: 4449955
    Abstract: An operating shaft mechanism in a pushbutton tuner, etc. characterized in that there is formed an enlarged portion in a central portion of a shaft element and the enlarged portion is formed with a plurality of slits in different phases with each other. The enlarged portion thus comprises a plurality of disc portions connected to each other by connecting portions which remain at the bottoms of the slits, thus to be flexible.
    Type: Grant
    Filed: August 6, 1981
    Date of Patent: May 22, 1984
    Assignee: Clarion Co., Ltd.
    Inventors: Tadaaki Watanabe, Yoshio Tanaka
  • Patent number: 4433588
    Abstract: A bearing mechanism for clutch shaft, in which a U-shaped fork bracket is secured to the frame side face of a pushbutton-operated tuner, of the right and left arms of said U-shaped fork bracket, to the one on the frame side being formed a V-shaped bearing hole, the portion of clutch shaft on the frame side being received in said V-shaped bearing hole; a circular bearing hole being formed in the opposite arm of said fork bracket, the tapered portion formed on the other end portion of the clutch shaft being fitted in said circular bearing hole.
    Type: Grant
    Filed: July 27, 1981
    Date of Patent: February 28, 1984
    Assignee: Clarion Co., Ltd.
    Inventors: Tadaaki Watanabe, Yoshio Tanaka