Patents by Inventor Hichirosai Oyobe

Hichirosai Oyobe 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: 20100019734
    Abstract: Commercial AC voltage applied to an input terminal (90) from a commercial power supply external to the vehicle is boosted by a transformer (86) to a voltage level higher than the voltage (VB) of an electricity storage device (B) to be applied to neutral points (N1, N2). In a charging mode of the electricity storage device (B) from a commercial power supply, all npn transistors of an inverter (20, 30) are turned off. The AC voltage applied to the neutral points (N1, N2) is rectified by an anti-parallel diode of the inverter (20, 30) to be supplied onto a power supply line (PL2). A boost converter (10) controls the charging current from the power supply line (PL2) towards the electricity storage device (B).
    Type: Application
    Filed: August 30, 2006
    Publication date: January 28, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Makoto Nakamura, Yukihiro Minezawa
  • Publication number: 20100007323
    Abstract: A control apparatus of a DC-DC converter includes a reactor and a switching element, repeats an accumulation and a discharge of energy of the reactor by a switching operation of the switching element, and converts a direct-current input voltage to acquire a direct-current output voltage. The control apparatus includes: a current value acquiring unit that acquires current values of the reactor in a current rising section and a current descending section of a current waveform of the reactor at a time interval of a half of a switching period of the switching element; and a center value estimating unit that estimates a center value of a current of the reactor based on the current values acquired in the current rising section and the current descending section.
    Type: Application
    Filed: July 13, 2009
    Publication date: January 14, 2010
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shintaro Tsujii, Hichirosai Oyobe, Kenji Yamada
  • Publication number: 20090306842
    Abstract: A vehicle preferential treatment system includes a controller mounted in a hybrid vehicle, and a server performing wireless communications with the controller. The controller estimates an SOC of an electric storage (not shown) and transmits the SOC to the server. When the SOC of the electric storage exceeds a reference level, the server gives a preferential treatment to the hybrid vehicle. Then, information on the preferential treatment is transmitted from the server to the controller, and is displayed on a display unit of the controller.
    Type: Application
    Filed: August 14, 2009
    Publication date: December 10, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Makoto Nakamura
  • Patent number: 7609022
    Abstract: A matrix converter (38) converts three-phase AC power input from a first motor-generator (MG1) directly to three-phase AC power for driving a second motor-generator (MG2) and outputs the resultant three-phase AC power, without rectifying the three-phase AC power generated by the first motor-generator (MG1) once to DC power as in an example using a conventional three-phase full-wave rectification inverter. In a power supply system for a vehicle (14), the three-phase AC power is transmitted and received between two motor-generators (MG1, MG2) more directly, by means of the matrix converter (38). Therefore, power loss can be reduced, as compared with a conventional example in which the three-phase AC power is once converted to DC power. Thus, a power supply system for a vehicle with improved energy efficiency and a vehicle including the same can be provided.
    Type: Grant
    Filed: March 1, 2005
    Date of Patent: October 27, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa
  • Patent number: 7603211
    Abstract: A vehicle preferential treatment system includes a controller mounted in a hybrid vehicle, and a server performing wireless communications with the controller. The controller estimates an SOC of an electric storage (not shown) and transmits the SOC to the server. When the SOC of the electric storage exceeds a reference level, the server gives a preferential treatment to the hybrid vehicle. Then, information on the preferential treatment is transmitted from the server to the controller, and is displayed on a display unit of the controller.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: October 13, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Makoto Nakamura
  • Publication number: 20090242288
    Abstract: When a control apparatus determines, based on a signal, that an ignition key has been turned to the OFF position, the control apparatus outputs to an actuator an operation command of an informing apparatus based on the SOC of a main battery. The informing apparatus is disposed at a location where it can easily be seen by the driver when the driver has exited from the vehicle, and driven by the actuator. The informing apparatus changes its projection amount from the external surface of the vehicle or an angle relative to the external surface of the vehicle based on the SOC of the main battery.
    Type: Application
    Filed: August 30, 2006
    Publication date: October 1, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Makoto Nakamura
  • Publication number: 20090224720
    Abstract: A first inverter control unit includes a harmonic generation unit. The harmonic generation unit generates a harmonic voltage instruction having a phase opposite to a harmonic generated at a neutral point of a motor-generator when the motor-generator revolves, based on motor revolution number of the motor-generator. A PWM signal generation unit generates a signal based on a voltage instruction obtained by superimposing an AC voltage instruction from an AC output control unit and the harmonic voltage instruction from the harmonic generation unit onto each voltage instruction of U-phase, V-phase and W-phase from a conversion unit.
    Type: Application
    Filed: June 22, 2006
    Publication date: September 10, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Yukihiro Minezawa, Shigenori Togashi
  • Patent number: 7582979
    Abstract: Vehicles are connected to respective receptacles of houses and are capable of generating commercial AC power to supply the generated electric power to a power transmission line. The vehicles communicate with a management server via the houses and the power transmission line. The vehicles output to the management server such information items concerning the vehicles as vehicle ID, amount of generated electric power and remaining amount of fuel. When electric power shortage occurs, the management server generates a start command and a power generation command for the vehicles based on the information concerning the vehicles to output the generated commands to the vehicles.
    Type: Grant
    Filed: May 16, 2006
    Date of Patent: September 1, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Yukihiro Minezawa
  • Publication number: 20090183934
    Abstract: First and second converters are connected in parallel to positive and negative lines, respectively. When a required power is smaller than a reference value, an ECU controls the first and second converters such that one of the first and second converters operates and the other stops. When the required power is equal to or larger than the reference value, the ECU controls the first and second converters such that both the first and second converters operate.
    Type: Application
    Filed: June 13, 2007
    Publication date: July 23, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Wangleng Ang, Shinji Ichikawa, Hiroshi Yoshida, Hiroki Sawada
  • Patent number: 7561389
    Abstract: Inverters, based on signals from a control device, generate a commercial AC voltage across neutral points of 3-phase coils. A Y-capacitor for removing noise is connected to a load outside the vehicle receiving the supply of the commercial AC voltage. A relay connected in series with a leakage detecting device is provided inside the vehicle. The relay is turned off when a plug of the load outside the vehicle is connected to a connector, and prevents a leakage current from flowing via a ground.
    Type: Grant
    Filed: May 2, 2006
    Date of Patent: July 14, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tetsuhiro Ishikawa, Hichirosai Oyobe, Yukihiro Minezawa, Shigenori Togashi
  • Publication number: 20090159348
    Abstract: An AC command voltage obtained by compensating a reference value of a commercial AC voltage output from a multiplication unit using an FB control unit is multiplied by k (0?k?1) by a multiplication unit and output to a first inverter control unit, and the remaining part is output to a second inverter control unit. The first and second inverter control units generate signals, based on command voltages obtained by superposing the AC command voltage from an AC output control unit on respective phase command voltages.
    Type: Application
    Filed: August 31, 2006
    Publication date: June 25, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Makoto Nakamura, Tetsuhiro Ishikawa, Shigenori Togashi
  • Publication number: 20090160247
    Abstract: A power supply device for a vehicle includes a battery (B1) which serves as a first power storage device, a battery (B2) which serves as a second power storage device, a vehicle load, a selection switch (RY0) which selects one of the first and second power storage devices and connects the selected power storage device to the vehicle load, and a control device (60) which, when a current flowing through the selection switch (RY0) is larger than a prescribed value, controls the vehicle load so that the current flowing through the selection switch (RY0) is made smaller than the prescribed value, and switches the selection switch. Preferably, when the control device (60) switches the selection switch (RY0), the control device controls inverters (20, 30) to achieve a balance between electric power generated in a first motor generator (MG2) and electric power consumed in a second motor generator (MG1).
    Type: Application
    Filed: July 27, 2006
    Publication date: June 25, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Makoto Nakamura, Hichirosai Oyobe, Tsuyoshi Yano
  • Patent number: 7550861
    Abstract: Upon power failure of a commercial power source, an automatic switching device switches to power supply from a hybrid vehicle. An ECU of the vehicle, when receiving a request for generation of a commercial AC voltage, sets an upper-limit power generation amount based on a remaining amount of fuel. The ECU transmits the upper-limit power generation amount via an antenna to an on-premises ECU, while controlling a power generation amount based on the upper-limit power generation amount. The on-premises, when receiving the upper-limit power generation amount, controls the load state such that commercial AC power is supplied firstly to a first load of priority level 1, according to proprieties registered in advance, and such that the amount of the power supplied to the electric loads does not exceed the upper-limit power generation amount.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: June 23, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Yukihiro Minezawa, Hitoshi Sato
  • Publication number: 20090146612
    Abstract: At the time of charging a power storage device from a commercial power supply, electric power from the commercial power supply is applied to a neutral point of each of first and second motor generators. A rotation preventing control unit (222) determines one phase to be subjected to switching control in the first inverter, based on a rotation angle (?1) of the first motor generator. Further, rotation preventing control unit (222) calculates torque generated in the first motor generator, generates a torque control value for canceling out the torque, and outputs the value to a phase voltage operating unit (214) for motor control.
    Type: Application
    Filed: June 12, 2007
    Publication date: June 11, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Makoto Nakamura, Yukihiro Minezawa
  • Publication number: 20090121659
    Abstract: When it is determined that an electric storage is to be charged from a commercial power source, a controller sets a control target of a voltage of a power line to be controlled by a boost converter, based on a voltage of the commercial power source. Specifically, the controller sets the control target of the voltage to a level approximately equal to the crest value of voltage. Then, the controller outputs an input permission command to a relay circuit, and controls inverters to execute charging of the electric storage.
    Type: Application
    Filed: September 20, 2006
    Publication date: May 14, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Makoto Nakamura, Tetsuhiro Ishikawa, Hiroshi Yoshida
  • Publication number: 20090115251
    Abstract: When charging of a power storage device from a commercial power supply is controlled, charging and cooling of the power storage device are performed in a timesharing manner. Specifically, when a temperature of the power storage device rises, a control device turns off a system main relay and stops a boost converter, and drives an inverter to operate a compressor (MC) for an air conditioner. When the power storage device is cooled down, the control device turns on the system main relay again and drives the boost converter, and stops the inverter.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 7, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Makoto Nakamura, Hichirosai Oyobe, Tetsuhiro Ishikawa
  • Publication number: 20090115355
    Abstract: A load on a vehicle is connected to first and second neutral points in first and second motor generators through a relay circuit and power output lines. A control device controls inverters depending on a requested voltage of the load on a vehicle such that a potential at the first neutral point becomes higher than a potential at the second neutral point by that requested voltage.
    Type: Application
    Filed: August 31, 2006
    Publication date: May 7, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Shoichi Sasaki, Makoto Nakamura, Tetsuhiro Ishikawa
  • Publication number: 20090101421
    Abstract: When an ignition key is turned ON, a control apparatus predicts the arrival time to a chargeable location (such as home). When the control apparatus determines that the expected arrival time is in the nighttime, it sets SOC control upper and lower limit values for an EV traveling-importance mode that are lower than SOC control upper and lower limit values for an HV traveling-importance mode, and controls an SOC of a battery based on the upper and lower limit values.
    Type: Application
    Filed: August 30, 2006
    Publication date: April 23, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hichirosai Oyobe, Makoto Nakamura
  • Publication number: 20090096416
    Abstract: An HV-ECU acquires electric power information from an electricity transmission line by using a modem. The electric power information includes information regarding the amount of carbon dioxide having been emitted in the generating process of the commercial electric power supplied from an electricity transmission line. When the CO2 emission amount is below a pre-set CO2 emission amount, the HV-ECU inputs the commercial electric power, and outputs a command to charge an electricity storage device to a motive power output device, so that the motive power output device executes a charging control of the electricity storage device.
    Type: Application
    Filed: December 5, 2006
    Publication date: April 16, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiromi Tonegawa, Masato Ichishi, Hichirosai Oyobe, Makoto Nakamura, Tetsuhiro Ishikawa, Yoshinori Fujitake
  • Publication number: 20090067205
    Abstract: An ECU detects an effective value and phase of a voltage from a commercial power supply, based on a voltage from a voltage sensor. Further, ECU generates a command current, which is a command value of current caused to flow through power lines and in-phase with the voltage of the commercial power supply, based on the detected effective value and the phase and on a charge/discharge power command value for a power storage device. Then, ECU controls zero-phase voltage of inverters based on the generated command current.
    Type: Application
    Filed: May 24, 2007
    Publication date: March 12, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hichirosai Oyobe, Tetsuhiro Ishikawa, Yoshitoshi Watanabe, Katsuhiro Asano