Patents by Inventor Keita Hashimoto

Keita Hashimoto 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: 9421495
    Abstract: To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: August 23, 2016
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NGK INSULATORS, LTD.
    Inventors: Keita Hashimoto, Masaru Kakinohana, Takeo Kobayashi, Tsuyoshi Watanabe, Yoshiyuki Kasai, Tadato Ito
  • Patent number: 9249707
    Abstract: In a plug-in hybrid vehicle that includes an EHC, an ECU eliminates a sulfur poisoned state by supplying external electric power to the EHC when it is necessary to eliminate a state in which adhesion to a catalyst in the EHC degrades a function of the catalyst and external charging is being performed. On the other hand, when it is necessary to eliminate the sulfur poisoned state, the external charging is not being performed, and operation of an engine is permitted, the sulfur poisoned state is eliminated by operating the engine.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: February 2, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keita Hashimoto, Yuki Hamasaki
  • Patent number: 9243540
    Abstract: A catalytic converter has a catalyst support that is heated due to supply of electricity, and a pair of electrodes that are disposed so as to contact an outer periphery of the catalyst support as seen in an orthogonal cross-section that is orthogonal to a direction in which exhaust flows. By making a volume resistivity of the electrodes be higher than that of electricity supplying portions of external cables that are connected to the electrodes respectively and are for supplying current to the electrodes, heat generated at the electrodes is provided to the catalyst support, and a generated heat amount of the catalyst support in vicinities of the electrodes is made to be large as compared with a generated heat amount at an inner portion of the catalyst support.
    Type: Grant
    Filed: March 12, 2012
    Date of Patent: January 26, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Patent number: 9225269
    Abstract: A vehicle includes an engine, an EHC (electrical heated catalyst), a first MG (motor generator) generating a counter electromotive force at the time of vehicle collision, a battery, a PCU (power control unit) having a converter and an inverter performing power conversion between the battery and the first MG, and an ECU. The PCU is connected to the battery through an SMR (system main relay). The EHC is connected between the converter and the inverter through EHC relay. The ECU determines whether or not vehicle collision has occurred. When the vehicle collision has occurred, the ECU opens the SMR to electrically separate the battery and the PCU and closes the EHC relay to electrically connect the EHC and the first MG, so that the counter electromotive force generated in the first MG at the time of vehicle collision is consumed at the EHC.
    Type: Grant
    Filed: August 8, 2011
    Date of Patent: December 29, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Patent number: 9169764
    Abstract: A hybrid vehicle equipped with an internal combustion engine and a motor-generator for running the vehicle, includes: a power storage device to be supplied to the motor-generator; a current leakage detection circuit detecting a decrease in insulation resistance, the current leakage detection circuit being electrically connected to a negative electrode of the power storage device; an electrical heated catalyst device; and a power supply device that converts electric power from the power storage device into energization power of the electrical heated catalyst device by a power conversion path passing through an insulating mechanism. The power supply device includes a switching device. The switching device is opened when the electrical heated catalyst device is energized, and is closed when the decrease in insulation resistance of the electrical heated catalyst device is detected.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: October 27, 2015
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Patent number: 9164449
    Abstract: An image forming apparatus includes an image forming member; a heating member; an opposing member that opposes the heating member; an urging member having one end attached to a first support member that supports the opposing member, the urging member urging the opposing member so that the opposing member presses a recording medium against the heating member; a moving member that moves from a closed position to an open position, a space accommodating the heating and opposing members being closed when the moving member is at the closed position and opened when the moving member is at the open position; and a cancelling member to which the other end of the urging member is attached and that is rotatably attached to a second support member that supports the heating member, the cancelling member rotating from the closed position to cancel a pressing force with which the recording medium is pressed.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: October 20, 2015
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Keita Hashimoto, Yukihiro Ichiki
  • Publication number: 20150224878
    Abstract: An EHC is configured to electrically heat a catalyst that purifies exhaust gas from an exhaust path of an internal combustion engine mounted on an electrically-powered vehicle, when a current passes through the EHC. A charger converts AC electric power supplied from an external power supply to a charging port into charging power of a power storage device by a power conversion path including an insulating transformer. The EHC is electrically connected to power lines which are provided on the primary side of the insulating transformer on the power conversion path, and to which a DC voltage is output. In a case where the EHC is operated when the vehicle travels, the charger converts the electric power from the power storage device into the DC voltage output to the power lines connected to the EHC, by a part of inverse conversion of power conversion at the time of external charging.
    Type: Application
    Filed: October 25, 2012
    Publication date: August 13, 2015
    Inventor: Keita Hashimoto
  • Publication number: 20150218995
    Abstract: An ECU executes a program including the steps of: determining whether an insulation resistance Ri is smaller than a threshold value Ri(0); if the insulation resistance Ri is smaller than the threshold value Ri(0), determining whether there is electric leakage between a vehicular body and an EHC and whether there is a possibility that there is electric leakage at a location other than a location between the vehicular body and the EHC; and if there is electric leakage between the vehicular body and the EHC, performing heating control.
    Type: Application
    Filed: October 23, 2012
    Publication date: August 6, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Publication number: 20150175153
    Abstract: A vehicle includes an engine, an electrically heated catalyst configured to purify exhaust gas of the engine, and a controller configured to control energizing power to the electrically heated catalyst. The controller is configured to determine the energizing power based on a vehicle speed of the vehicle and an acceleration of the vehicle, when energizing the electrically heated catalyst before the engine is started.
    Type: Application
    Filed: October 11, 2013
    Publication date: June 25, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Patent number: 9028366
    Abstract: A hybrid vehicle in which at least two shift ranges can be selected for a single running direction includes an engine, a motor generator, an EHC raising the temperature of a catalyst for cleaning up an exhaust gas from the engine, and an ECU. While the vehicle is running, if the engine is stopped and, of the two shift ranges, a shift range where larger decelerating force is produced by regenerative braking of the motor generator has been selected, the ECU causes the EHC to raise the temperature of the catalyst using electric power generated by the motor generator.
    Type: Grant
    Filed: February 16, 2011
    Date of Patent: May 12, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keita Hashimoto
  • Publication number: 20150075142
    Abstract: In a plug-in hybrid vehicle that includes an EHC, an ECU eliminates a sulfur poisoned state by supplying external electric power to the EHC when it is necessary to eliminate a state in which adhesion to a catalyst in the EHC degrades a function of the catalyst and external charging is being performed. On the other hand, when it is necessary to eliminate the sulfur poisoned state, the external charging is not being performed, and operation of an engine is permitted, the sulfur poisoned state is eliminated by operating the engine.
    Type: Application
    Filed: August 26, 2014
    Publication date: March 19, 2015
    Inventors: Keita Hashimoto, Yuki Hamasaki
  • Patent number: 8925301
    Abstract: A vehicle includes: an engine; an EHC (electrically heated catalyst) electrically heated for purifying exhaust gas of the engine; a temperature sensor for sensing the temperature of the EHC; and an ECU that controls the EHC in temperature. The ECU performs a first estimation process and a second estimation process to estimate the temperature of the EHC and accordingly controls electric power applied to energize the EHC, the first estimation process being performed to estimate the temperature of the EHC based on an output of the temperature sensor before the engine starts, the second estimation process being performed to estimate the temperature of the EHC based on the temperature of the exhaust gas emitted by the engine after the engine is started.
    Type: Grant
    Filed: February 1, 2011
    Date of Patent: January 6, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keita Hashimoto
  • Publication number: 20140125260
    Abstract: A vehicle includes an engine, an EHC (electrical heated catalyst), a first MG (motor generator) generating a counter electromotive force at the time of vehicle collision, a battery, a PCU (power control unit) having a converter and an inverter performing power conversion between the battery and the first MG, and an ECU. The PCU is connected to the battery through an SMR (system main relay). The EHC is connected between the converter and the inverter through EHC relay. The ECU determines whether or not vehicle collision has occurred. When the vehicle collision has occurred, the ECU opens the SMR to electrically separate the battery and the PCU and closes the EHC relay to electrically connect the EHC and the first MG, so that the counter electromotive force generated in the first MG at the time of vehicle collision is consumed at the EHC.
    Type: Application
    Filed: August 8, 2011
    Publication date: May 8, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Publication number: 20140109556
    Abstract: A hybrid vehicle equipped with an internal combustion engine and a motor-generator for running the vehicle, includes: a power storage device to be supplied to the motor-generator; a current leakage detection circuit detecting a decrease in insulation resistance, the current leakage detection circuit being electrically connected to a negative electrode of the power storage device; an electrical heated catalyst device; and a power supply device that converts electric power from the power storage device into energization power of the electrical heated catalyst device by a power conversion path passing through an insulating mechanism. The power supply device includes a switching device. The switching device is opened when the electrical heated catalyst device is energized, and is closed when the decrease in insulation resistance of the electrical heated catalyst device is detected.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 24, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita HASHIMOTO
  • Patent number: 8660730
    Abstract: A vehicle includes: a catalyst device configured to be electrically heatable for purifying exhaust gas of an internal combustion engine; a first temperature detection unit for detecting the temperature of the catalyst device; a state-of-charge detection unit for detecting the state of charge of a power storage device; a second temperature detection unit for detecting the temperature of the power storage device; a catalyst power supply device supplying the catalyst device with electric power for heating it; and a controller. The controller calculates first electric power that the power storage device can supply based on the state of charge of the power storage device and an output of the second temperature detection unit, and the controller determines according to an output of the first temperature detection unit whether to cause the catalyst power supply device to supply the catalyst device with the first electric power.
    Type: Grant
    Filed: March 10, 2010
    Date of Patent: February 25, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keita Hashimoto
  • Publication number: 20140037511
    Abstract: A catalytic converter has a catalyst support that is heated due to supply of electricity, and a pair of electrodes that are disposed so as to contact an outer periphery of the catalyst support as seen in an orthogonal cross-section that is orthogonal to a direction in which exhaust flows. By making a volume resistivity of the electrodes be higher than that of electricity supplying portions of external cables that are connected to the electrodes respectively and are for supplying current to the electrodes, heat generated at the electrodes is provided to the catalyst support, and a generated heat amount of the catalyst support in vicinities of the electrodes is made to be large as compared with a generated heat amount at an inner portion of the catalyst support.
    Type: Application
    Filed: March 12, 2012
    Publication date: February 6, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Publication number: 20140004014
    Abstract: To provide a catalytic converter that reduces non-uniformity of temperature of a catalyst support and that can approach a uniform temperature distribution, and a structural body for supporting a catalyst that structures this catalytic converter. At a catalyst support, gradually decreasing width portions, at which a width thereof gradually decreases toward electrode centers, are formed at regions where electrodes, are contactingly disposed, as seen in a cross-section orthogonal to a direction in which exhaust flows. The width is shorter than a length of a center line at a given position. Heat generation and heat dissipation of the catalyst support are balanced overall.
    Type: Application
    Filed: March 12, 2012
    Publication date: January 2, 2014
    Applicants: NGK INSULATORS, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keita Hashimoto, Masaru Kakinohana, Takeo Kobayashi, Tsuyoshi Watanabe, Yoshiyuki Kasai, Tadato Ito
  • Publication number: 20130324363
    Abstract: A hybrid vehicle (100) in which at least two shift ranges can be selected for a single running direction includes an engine (160), a motor generator (135), an EHC (180) raising the temperature of a catalyst for cleaning up an exhaust gas from the engine (160), and an ECU (300). While the vehicle (100) is running, if the engine (160) is stopped and, of the two shift ranges, a shift range where larger decelerating force is produced by regenerative braking of the motor generator (135) has been selected, the ECU (300) causes the EHC (180) to raise the temperature of the catalyst using electric power generated by the motor generator (135).
    Type: Application
    Filed: February 16, 2011
    Publication date: December 5, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Publication number: 20130305692
    Abstract: A vehicle includes: an engine; an EHC (electrically heated catalyst) electrically heated for purifying exhaust gas of the engine; a temperature sensor for sensing the temperature of the EHC; and an ECU that controls the EHC in temperature. The ECU performs a first estimation process and a second estimation process to estimate the temperature of the EHC and accordingly controls electric power applied to energize the EHC, the first estimation process being performed to estimate the temperature of the EHC based on an output of the temperature sensor before the engine starts, the second estimation process being performed to estimate the temperature of the EHC based on the temperature of the exhaust gas emitted by the engine after the engine is started.
    Type: Application
    Filed: February 1, 2011
    Publication date: November 21, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keita Hashimoto
  • Patent number: 8490740
    Abstract: A vehicle includes a PCU serving as a power control unit controlling the electric power for vehicle running, a battery storing the electric power for vehicle running, and an EHC serving as an electrically heated catalyst. The PCU includes a converter, an inverter, and a positive line and a negative line each connecting the converter and the inverter. The converter boosts a voltage VL output from the battery to a requested voltage value VHsys. The EHC has a positive end connected to the positive line. The EHC also has a negative end connected to the negative line.
    Type: Grant
    Filed: March 15, 2010
    Date of Patent: July 23, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keita Hashimoto, Katsumi Tsuchida, Yasuharu Terada