Patents by Inventor Yoshimitsu Takahashi

Yoshimitsu Takahashi 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: 10011260
    Abstract: A hybrid vehicle includes an engine, a motor, a battery and an electronic control unit. The electronic control unit is configured to set a running torque based on a required torque of a drive shaft according to an accelerator opening degree. The electronic control unit is configured to control the engine and the motor such that the running torque is output to the drive shaft. The electronic control unit is configured to limit the power of the engine by use of the running torque or a drive-shaft torque output to the drive shaft as a torque for determination until the torque for determination reaches a torque threshold smaller than the required torque, as compared with the power of the engine after the torque for determination has reached the torque threshold, when a predetermined acceleration request is made by a user.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: July 3, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9873209
    Abstract: A mixer vehicle provided with a mixer drum mounted on a vehicle, the mixer drum being adapted to load uncured concrete includes a driving device for rotating the mixer drum and a loaded state detector for detecting whether the uncured concrete is loaded on the mixer drum or not. Rotation of the mixer drum by the driving device is stopped if the vehicle is in the stop state and the loaded state detector detects that the uncured concrete is not loaded on the mixer drum.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: January 23, 2018
    Assignee: KYB Corporation
    Inventor: Yoshimitsu Takahashi
  • Publication number: 20180001787
    Abstract: In a motor vehicle, an accelerator operation amount is changed among a first region, a second region, and a third region. The motor vehicle is configured to perform a first control that applies a braking force to the vehicle when the accelerator operation amount is at least in the first region or in the second region or to perform a second control that applies a smaller braking force to the vehicle than the braking force applied by the first control when the accelerator operation amount is in the first region or in the second region. The motor vehicle is also configured to continue execution of the first control without changing over control to the second control, when an execution request for the second control is given during execution of the first control in the second region of the accelerator operation amount.
    Type: Application
    Filed: June 19, 2017
    Publication date: January 4, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshimitsu TAKAHASHI, Yoshikazu MOTOZONO, Tomoya YAMAGUCHI
  • Patent number: 9827874
    Abstract: A vehicle includes a front-wheel/rear-wheel motor, a battery and an ECU. The ECU is configured to (i) control the front-wheel/rear-wheel motors, and (ii) control the front-wheel/rear-wheel motors such that a braking torque of a resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is smaller than the braking torque of the resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, and such that the braking torque of a non-resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is larger than the braking torque of the non-resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, during deceleration caused by a braking torque from the front-wheel/rear-wheel motors.
    Type: Grant
    Filed: November 2, 2015
    Date of Patent: November 28, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9758148
    Abstract: When a basic creep torque Tctmp is a positive value and a braking torque demand Trb* is a negative value, the control procedure sets a basic reflection rate Rctmp based on the braking torque demand Trb* (S240). In a state of non-activation of vehicle distance control (S250), the control procedure sets a target reflection rate Rc* using the basic reflection rate Rctmp directly (S230). In a state of activation of vehicle distance control (S250), the control procedure sets the target reflection rate Rc* using a guarded reflection rate Rcgd obtained by guarding the lower limit of the basic reflection rate Rctmp with a previous value of the target reflection rate (previous Rc*) in a previous cycle (S270 and S280).
    Type: Grant
    Filed: March 19, 2015
    Date of Patent: September 12, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9726276
    Abstract: A mixer drum driving apparatus includes an auxiliary fluid pressure pump that is provided independently of a fluid pressure pump and is capable of supplying a working fluid to a fluid pressure motor so as to cause a mixer drum to perform agitation rotation, a plurality of motors configured to drive the auxiliary fluid pressure pump to rotate, and a control unit that controls rotation of the mixer drum. When an engine is stopped during the agitation rotation of the mixer drum, the control unit drives the auxiliary fluid pressure pump to rotate by operating the plurality of motors selectively in accordance with a load of the mixer drum.
    Type: Grant
    Filed: February 26, 2013
    Date of Patent: August 8, 2017
    Assignee: KYB Corporation
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9701300
    Abstract: In an accelerator-off state, a torque command Tm1* of a first motor is set such that an engine, that is in a state in which fuel injection is stopped, is subjected to motoring by the first motor. Subsequently, torque commands Tm2* and Tm3* of a second motor and a third motor are set such that a torque of the second motor becomes equal to or less than a threshold value—Tref or equal to or more than a threshold value Tref and a hybrid vehicle runs with a required torque Td*. Then, the first motor, the second motor, and the third motor are controlled by using the torque commands Tm1*, Tm2*, and Tm3*.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: July 11, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9694683
    Abstract: A mixer drum driving apparatus having a mixer drum carried on a frame of a mixer truck to be free to rotate and a drive source configured to drive the mixer drum to rotate includes a rotary motor configured to drive the mixer drum to rotate as the drive source, a power supply configured to supply power to the rotary motor, and a power generator configured to generate power as the mixer drum rotates and charge the generated power to the power supply.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: July 4, 2017
    Assignee: KYB Corporation
    Inventors: Yoshimitsu Takahashi, Kazunori Tanaka
  • Patent number: 9669819
    Abstract: In a state of reverse driving with load operation of an engine, an upper limit torque Temax of the engine is set to cause a total torque of a torque demand Tr* and a cancellation torque for cancelling a torque applied to a driveshaft accompanied with load operation of the engine to be output from a second motor to the driveshaft. A product of the upper limit torque Temax of the engine and an upper limit rotation speed Nemax of the engine is set to an upper limit power Pemax. A target power Pe* of the engine is then set in a range of not greater than the upper limit power Pemax. The engine, a first motor and the second motor are then controlled such as to cause the target power Pe* to be output from the engine and such as to output the torque demand Tr* to the driveshaft.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: June 6, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tatsuki Saito, Yoshimitsu Takahashi, Shoichi Sasaki
  • Patent number: 9551385
    Abstract: A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. The auxiliary hydraulic pump is driven and rotated by the direct-current brush motor when the engine stops during the rotation of the mixer drum for mixing.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: January 24, 2017
    Assignee: KYB Corporation
    Inventors: Yoshimitsu Takahashi, Tetsuo Kasahara, Kazunori Tanaka
  • Patent number: 9499041
    Abstract: A hybrid vehicle provided with an engine, a first motor generator, a planetary gear mechanism, a second motor generator, a battery, a battery state sensing unit which senses the voltage and the residual capacity of the battery, a steepness sensor which senses the uphill steepness, an accelerator pedal depression amount sensor, and a controller. The minimum rotation speed of the engine is set in accordance with the uphill steepness and the accelerator pedal depression amount, when the hybrid vehicle is travelling in reverse and the battery is charged with the voltage of the battery equal to or below a first threshold or the residual capacity of the battery equal to or below a second threshold.
    Type: Grant
    Filed: February 4, 2015
    Date of Patent: November 22, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Yoshimitsu Takahashi
  • Patent number: 9481106
    Abstract: A mixer drum driving device includes a mixer drum, a hydraulic motor, a hydraulic pump, an auxiliary hydraulic pump for rotating the mixer drum for mixing by supplying pressure oil to the hydraulic motor independently of the hydraulic pump, and a direct-current brush motor for driving and rotating the auxiliary hydraulic pump. In the case of rotating the mixer drum for mixing, the mixer drum is driven and rotated by driving only the auxiliary hydraulic pump by the direct-current brush motor.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 1, 2016
    Assignee: KYB Corporation
    Inventors: Yoshimitsu Takahashi, Kazunori Tanaka
  • Publication number: 20160250774
    Abstract: A mixer vehicle provided with a mixer drum mounted on a vehicle, the mixer drum being adapted to load uncured concrete includes a driving device for rotating the mixer drum and a loaded state detector for detecting whether the uncured concrete is loaded on the mixer drum or not. Rotation of the mixer drum by the driving device is stopped if the vehicle is in the stop state and the loaded state detector detects that the uncured concrete is not loaded on the mixer drum.
    Type: Application
    Filed: March 27, 2014
    Publication date: September 1, 2016
    Inventor: Yoshimitsu TAKAHASHI
  • Publication number: 20160229390
    Abstract: A hybrid vehicle includes an engine, a motor, a battery and an electronic control unit. The electronic control unit is configured to set a running torque based on a required torque of a drive shaft according to an accelerator opening degree. The electronic control unit is configured to control the engine and the motor such that the running torque is output to the drive shaft. The electronic control unit is configured to limit the power of the engine by use of the running torque or a drive-shaft torque output to the drive shaft as a torque for determination until the torque for determination reaches a torque threshold smaller than the required torque, as compared with the power of the engine after the torque for determination has reached the torque threshold, when a predetermined acceleration request is made by a user.
    Type: Application
    Filed: February 5, 2016
    Publication date: August 11, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu TAKAHASHI
  • Patent number: 9346186
    Abstract: A mixer drum driving apparatus includes a liquid-pressure motor that drives the mixer drum to rotate, a liquid-pressure pump that is driven by a motive force of an engine and supplies working liquid to the liquid-pressure motor, an auxiliary liquid-pressure pump that is driven by an electric motor and supplies working liquid to the liquid-pressure motor, a pressure detector that detects a liquid pressure of working liquid discharged from the auxiliary liquid-pressure pump, and a switching valve that switches whether or not working liquid from the auxiliary liquid-pressure pump is supplied to the liquid-pressure motor. In a state in which the switching valve is closed and the mixer drum is being driven to rotate by the liquid-pressure motor that is driven by the liquid-pressure pump, the controller opens the switching valve if a liquid pressure detected by the pressure detector reaches or exceeds a preset liquid pressure.
    Type: Grant
    Filed: September 11, 2013
    Date of Patent: May 24, 2016
    Assignee: KYB Corporation
    Inventor: Yoshimitsu Takahashi
  • Publication number: 20160129810
    Abstract: A vehicle includes a front-wheel/rear-wheel motor, a battery and an ECU. The ECU is configured to (i) control the front-wheel/rear-wheel motors, and (ii) control the front-wheel/rear-wheel motors such that a braking torque of a resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is smaller than the braking torque of the resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, and such that the braking torque of a non-resonance-side motor, when at least one of the rotation speed of the front-wheel/rear-wheel motors is within a resonance range, is larger than the braking torque of the non-resonance-side motor, when the rotation speed of the front-wheel/rear-wheel motors are outside the resonance range, during deceleration caused by a braking torque from the front-wheel/rear-wheel motors.
    Type: Application
    Filed: November 2, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu TAKAHASHI
  • Publication number: 20160129903
    Abstract: In an accelerator-off state, a torque command Tm1* of a first motor is set such that an engine, that is in a state in which fuel injection is stopped, is subjected to motoring by the first motor. Subsequently, torque commands Tm2* and Tm3* of a second motor and a third motor are set such that a torque of the second motor becomes equal to or less than a threshold value—Tref or equal to or more than a threshold value Tref and a hybrid vehicle runs with a required torque Td*. Then, the first motor, the second motor, and the third motor are controlled by using the torque commands Tm1*, Tm2*, and Tm3*.
    Type: Application
    Filed: November 5, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu TAKAHASHI
  • Publication number: 20160129911
    Abstract: A motor vehicle is controlled: during a prescribed transition from an accelerator ON state to an accelerator OFF and brake OFF state, the control unit makes a rear wheel distribution ratio that is a ratio of a torque of the rear wheel to a sum of a torque of the front wheel and the torque of the rear wheel, change to a first prescribed distribution ratio after changing from a value during the accelerator ON state to a second prescribed distribution ratio that is larger than the first prescribed distribution ratio.
    Type: Application
    Filed: November 4, 2015
    Publication date: May 12, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Yoshimitsu TAKAHASHI
  • Publication number: 20160075322
    Abstract: In a state of reverse driving with load operation of an engine, an upper limit torque Temax of the engine is set to cause a total torque of a torque demand Tr* and a cancellation torque for cancelling a torque applied to a driveshaft accompanied with load operation of the engine to be output from a second motor to the driveshaft. A product of the upper limit torque Temax of the engine and an upper limit rotation speed Nemax of the engine is set to an upper limit power Pemax. A target power Pe* of the engine is then set in a range of not greater than the upper limit power Pemax. The engine, a first motor and the second motor are then controlled such as to cause the target power Pe* to be output from the engine and such as to output the torque demand Tr* to the driveshaft.
    Type: Application
    Filed: August 31, 2015
    Publication date: March 17, 2016
    Inventors: Tatsuki SAITO, Yoshimitsu TAKAHASHI, Shoichi SASAKI
  • Patent number: 9216730
    Abstract: An ECU is mounted on a vehicle including an engine and a motor that can generate cranking torque applied to a rotation shaft of the engine. Where a request for starting the engine is not issued, the ECU determines whether the engine is during coasting or not. The ECU changes cranking target torque in accordance with engine rotation speed. In this way, engine rotation speed during cranking can be reduced to and remain in the optimum region where misfire and resonance can be avoided.
    Type: Grant
    Filed: October 12, 2012
    Date of Patent: December 22, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoshimitsu Takahashi, Keisuke Morisaki, Daisuke Itoyama, Hideaki Yaguchi, Shinichi Sugai