Patents by Inventor Keisuke Hata

Keisuke Hata 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: 11056975
    Abstract: There is provided a voltage conversion device that is configured to perform zero point adjustment of a high voltage-system voltage detected by a high voltage-system voltage detector, when a relay is off. The voltage conversion device is also configured to estimate a forward voltage of an upper arm diode and to perform output adjustment of the high voltage-system voltage detected by the high voltage-system voltage detector, based on a voltage calculated by subtracting the forward voltage from a power storage voltage detected by a power storage voltage detector, when the relay is on, a low voltage-system power line has no electric power consumption, and a voltage conversion circuit does not perform voltage conversion. The voltage conversion device is further configured to create a high voltage-system voltage correction map, based on results of the zero point adjustment and the output adjustment of the high voltage-system voltage.
    Type: Grant
    Filed: January 23, 2020
    Date of Patent: July 6, 2021
    Assignee: DENSO CORPORATION
    Inventor: Keisuke Hata
  • Publication number: 20200287462
    Abstract: There is provided a voltage conversion device that is configured to perform zero point adjustment of a high voltage-system voltage detected by a high voltage-system voltage detector, when a relay is off. The voltage conversion device is also configured to estimate a forward voltage of an upper arm diode and to perform output adjustment of the high voltage-system voltage detected by the high voltage-system voltage detector, based on a voltage calculated by subtracting the forward voltage from a power storage voltage detected by a power storage voltage detector, when the relay is on, a low voltage-system power line has no electric power consumption, and a voltage conversion circuit does not perform voltage conversion. The voltage conversion device is further configured to create a high voltage-system voltage correction map, based on results of the zero point adjustment and the output adjustment of the high voltage-system voltage.
    Type: Application
    Filed: January 23, 2020
    Publication date: September 10, 2020
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Keisuke HATA
  • Patent number: 10524374
    Abstract: An electric device includes a substrate on which electronic components are mounted, and a metal plate to which the substrate is fixed. The metal plate includes first bosses provided at positions corresponding to four corners of the substrate, a second boss provided inside a rectangle that connects the four first bosses, and a slit that is provided adjacent to the second boss, and extends in non-parallel with any side of the rectangle. The substrate is fixed to each of the four first bosses with a first male screw, such that a rubber washer is sandwiched between the substrate and the first male screw. The substrate is fixed to the second boss with a second male screw, such that no rubber washer is sandwiched between the substrate and the second male screw.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: December 31, 2019
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Shoji Tsutsui, Hiroki Umeda, Masatoshi Shinohara, Keisuke Hata, Daisuke Harada
  • Patent number: 10439545
    Abstract: In a control apparatus including a drive unit, first and second power supplies, a first diode, first and second control units, and a control method of the control apparatus, the first diode is connected to first and second power lines such that a direction from the second power line to the first power line is set as a forward direction, the second control unit is configured to calculate correction information for a first state value based on the voltage of the first power line before and after an abnormality has occurred in the first power supply and to transmit the correction information to the first control unit when the abnormality has occurred in the first power supply, and the first control unit is configured to correct the first state value using the correction information when the correction information has been received from the second control unit.
    Type: Grant
    Filed: October 29, 2018
    Date of Patent: October 8, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keisuke Hata
  • Publication number: 20190281722
    Abstract: An electric device includes a substrate on which electronic components are mounted, and a metal plate to which the substrate is fixed. The metal plate includes first bosses provided at positions corresponding to four corners of the substrate, a second boss provided inside a rectangle that connects the four first bosses, and a slit that is provided adjacent to the second boss, and extends in non-parallel with any side of the rectangle. The substrate is fixed to each of the four first bosses with a first male screw, such that a rubber washer is sandwiched between the substrate and the first male screw. The substrate is fixed to the second boss with a second male screw, such that no rubber washer is sandwiched between the substrate and the second male screw.
    Type: Application
    Filed: March 8, 2019
    Publication date: September 12, 2019
    Applicants: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Shoji Tsutsui, Hiroki Umeda, Masatoshi Shinohara, Keisuke Hata, Daisuke Harada
  • Patent number: 10374509
    Abstract: In a control circuit for controlling a power converter that includes a switch, a power supply circuit outputs electrical power, and a command generator generates a switching command that controls switching operations of the switch, based on the electrical power output from the power supply circuit. A failure mode determiner executes a determination of whether which of failure modes has occurred in the power supply circuit, and outputs a result of the determination. A switch controller selectively executes, based on the result of the determination, a first switch control task and a second switch control task. The first switch control task forcibly shuts down the switch independently of the switching command, and the second switch control task enables the switching operations of the switch to be continuously controlled based on the switching command.
    Type: Grant
    Filed: November 19, 2018
    Date of Patent: August 6, 2019
    Assignees: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Nishibata, Yusuke Shindo, Tomohisa Ose, Junichi Fukuta, Yasuhiro Terao, Eiichiro Shigehara, Keisuke Hata
  • Publication number: 20190157969
    Abstract: In a control circuit for controlling a power converter that includes a switch, a power supply circuit outputs electrical power, and a command generator generates a switching command that controls switching operations of the switch, based on the electrical power output from the power supply circuit. A failure mode determiner executes a determination of whether which of failure modes has occurred in the power supply circuit, and outputs a result of the determination. A switch controller selectively executes, based on the result of the determination, a first switch control task and a second switch control task. The first switch control task forcibly shuts down the switch independently of the switching command, and the second switch control task enables the switching operations of the switch to be continuously controlled based on the switching command.
    Type: Application
    Filed: November 19, 2018
    Publication date: May 23, 2019
    Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi NISHIBATA, Yusuke SHINDO, Tomohisa OSE, Junichi FUKUTA, Yasuhiro TERAO, Eiichiro SHIGEHARA, Keisuke HATA
  • Publication number: 20190140576
    Abstract: In a control apparatus including a drive unit, first and second power supplies, a first diode, first and second control units, and a control method of the control apparatus, the first diode is connected to first and second power lines such that a direction from the second power line to the first power line is set as a forward direction, the second control unit is configured to calculate correction information for a first state value based on the voltage of the first power line before and after an abnormality has occurred in the first power supply and to transmit the correction information to the first control unit when the abnormality has occurred in the first power supply, and the first control unit is configured to correct the first state value using the correction information when the correction information has been received from the second control unit.
    Type: Application
    Filed: October 29, 2018
    Publication date: May 9, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Keisuke Hata
  • Patent number: 9828028
    Abstract: When starting automatic pulling-in control, an electronic control unit calculates a temperature increase amount ?Ti of a motor caused by the execution of the automatic pulling-in control and a temperature increase amount ?To of the motor caused by the execution of automatic pulling-out control. Based on the current temperature of the motor, the temperature increase amount ?Ti, and the temperature increase amount ?To, the electronic control unit obtains a predicted temperature of the motor of a case in which the automatic pulling-out control is executed subsequent to the automatic pulling-in control. When the predicted temperature is lower than an allowable upper limit, starting of the automatic pulling-in control is permitted. When the predicted temperature is higher than or equal to the allowable upper limit, starting of the automatic pulling-in control is prohibited.
    Type: Grant
    Filed: June 5, 2013
    Date of Patent: November 28, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hironobu Ishijima, Eriko Yamazaki, Keisuke Oyama, Hisashi Satonaka, Hidehiko Miyoshi, Keisuke Hata
  • Patent number: 9708003
    Abstract: When performing automatic control of a steering device that assists a host vehicle to be pulled into or out of a parking space, an electronic control unit performs the following procedure. When there is, as a path for pulling the vehicle into or out of the parking space, a path in which a predicted temperature of the steering device for when the automatic control is performed to move the vehicle along the path would be lower than an allowable upper limit value, the electronic control unit starts the automatic control to move the vehicle along the path. In contrast, when there is no path in which the predicted temperature is lower than the allowable upper limit value, the electronic control unit prohibits the automatic control.
    Type: Grant
    Filed: June 26, 2013
    Date of Patent: July 18, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hironobu Ishijima, Eriko Yamazaki, Keisuke Oyama, Hisashi Satonaka, Hidehiko Miyoshi, Keisuke Hata
  • Patent number: 9676414
    Abstract: A parking assistance device assists the operation of steerable wheels for the entry of a vehicle into a parking space by the automatic control of a steering device. Upon execution of the automatic control, an entry path for moving the vehicle to the parking position is calculated, and also, a target steered angle for moving the vehicle along the entry path is calculated, and the actual steered angle is detected. If the target steered angle is an angle closer to the neutral angle than the actual steered angle, then the operation of the steering wheel through the automatic control is stopped. If the target steered angle is not at an angle closer to the neutral angle than the actual steered angle, then the operation of the steering wheel through the automatic control is executed.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: June 13, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Keisuke Oyama, Hironobu Ishijima, Hidehiko Miyoshi, Keisuke Hata
  • Patent number: 9643602
    Abstract: A parking support device 1 includes a calculation unit 17 that calculates a speed pattern, an acceleration recognition unit 13 that recognizes driver-requested acceleration, a parking support control unit 19 that performs parking support control in a target parking position based on the speed pattern, and a determination unit 18 that determines whether a host vehicle V can stop in the target parking position at a set deceleration. When the driver-requested acceleration is recognized during the control and exceeds acceleration of the speed pattern at the time of recognition, the parking support control unit 19 accelerates the host vehicle V at the driver-requested acceleration. When the determination unit 18 determines that the host vehicle V can stop in the target parking position at the set deceleration, the host vehicle V is decelerated at the set deceleration and is stopped in the target parking position regardless of the driver-requested acceleration.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: May 9, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryuji Okamura, Atsushi Sagisaka, Shinya Sannodo, Yu Hiei, Kotaro Saiki, Keisuke Hata
  • Publication number: 20160107690
    Abstract: A parking assistance device assists the operation of steerable wheels for the entry of a vehicle into a parking space by the automatic control of a steering device. Upon execution of the automatic control, an entry path for moving the vehicle to the parking position is calculated, and also, a target steered angle for moving the vehicle along the entry path is calculated, and the actual steered angle is detected. If the target steered angle is an angle closer to the neutral angle than the actual steered angle, then the operation of the steering wheel through the automatic control is stopped. If the target steered angle is not at an angle closer to the neutral angle than the actual steered angle, then the operation of the steering wheel through the automatic control is executed.
    Type: Application
    Filed: May 29, 2013
    Publication date: April 21, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke OYAMA, Hironobu ISHIJIMA, Hidehiko MIYOSHI, Keisuke HATA
  • Publication number: 20160101813
    Abstract: When starting automatic pulling-in control, an electronic control unit calculates a temperature increase amount ?Ti of a motor caused by the execution of the automatic pulling-in control and a temperature increase amount ?To of the motor caused by the execution of automatic pulling-out control. Based on the current temperature of the motor, the temperature increase amount ?Ti, and the temperature increase amount ?To, the electronic control unit obtains a predicted temperature of the motor of a case in which the automatic pulling-out control is executed subsequent to the automatic pulling-in control. When the predicted temperature is lower than an allowable upper limit, starting of the automatic pulling-in control is permitted. When the predicted temperature is higher than or equal to the allowable upper limit, starting of the automatic pulling-in control is prohibited.
    Type: Application
    Filed: June 5, 2013
    Publication date: April 14, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hironobu ISHIJIMA, Eriko YAMAZAKI, Keisuke OYAMA, Hisashi SATONAKA, Hidehiko MIYOSHI, Keisuke HATA
  • Publication number: 20160068187
    Abstract: An electronic control unit assists parking of a host vehicle into a parking space. Ultrasonic sensors detect the shape of the side edge of a road and the presence of an obstacle at the road edge. The electronic control unit sets one corner of the obstacle positioned on the side opposite to the road side edge as an originating corner, sets an imaginary line that follows the shape of the road side edge and extends from the originating corner, and recognizes the space between the imaginary line and the road side edge as a parking space. The electronic control unit then determines whether the vehicle can be parked in the recognized parking space.
    Type: Application
    Filed: April 26, 2013
    Publication date: March 10, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keisuke HATA, Hironobu ISHIJIMA, Eriko YAMAZAKI
  • Patent number: 9266562
    Abstract: A parking assist device assists entry or exit of a vehicle with respect to a parking space through an automatic control of a steering device. The parking assist device includes: a calculator that obtains, to perform the automatic control of the steering device, a path for allowing the vehicle to enter or exit the parking space based on the parking space, calculates an amount of temperature rise of the steering device at the execution of the automatic control for allowing the vehicle to move along the obtained path, and calculates a predicted temperature of the steering device at the execution of the automatic control by adding the calculated amount of temperature rise to a current value of the temperature of the steering device; and a controller that inhibits the execution of the automatic control when the predicted temperature is equal to or higher than a determination value.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: February 23, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Eriko Yamazaki, Hisashi Satonaka, Michihito Shimada, Hironobu Ishijima, Hidehiko Miyoshi, Keisuke Hata
  • Publication number: 20150375740
    Abstract: A parking support device 1 includes a calculation unit 17 that calculates a speed pattern, an acceleration recognition unit 13 that recognizes driver-requested acceleration, a parking support control unit 19 that performs parking support control in a target parking position based on the speed pattern, and a determination unit 18 that determines whether a host vehicle V can stop in the target parking position at a set deceleration. When the driver-requested acceleration is recognized during the control and exceeds acceleration of the speed pattern at the time of recognition, the parking support control unit 19 accelerates the host vehicle V at the driver-requested acceleration. When the determination unit 18 determines that the host vehicle V can stop in the target parking position at the set deceleration, the host vehicle V is decelerated at the set deceleration and is stopped in the target parking position regardless of the driver-requested acceleration.
    Type: Application
    Filed: June 8, 2015
    Publication date: December 31, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryuji OKAMURA, Atsushi SAGISAKA, Shinya SANNODO, Yu HIEI, Kotaro SAIKI, Keisuke HATA
  • Publication number: 20150307090
    Abstract: A parking assistance device includes an obstacle detection unit configured to detect an obstacle around a vehicle, a parking point detection unit configured to detect a parking target point where the vehicle can be parked based on the result of the obstacle detection, and a parking assistance control unit configured to guide the vehicle from a parking start point to the parking target point according to a guidance route based on the result of the obstacle detection and the result of the parking target point detection in a case where a traveling of the vehicle is detected during a period of time from a time when the vehicle reaches the parking start point to a time when a shift range is changed, the parking assistance control unit does not execute the guidance of the vehicle.
    Type: Application
    Filed: December 13, 2012
    Publication date: October 29, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hisashi SATONAKA, Hironobu ISHIJIMA, Eriko YAMAZAKI, Keisuke HATA, Hidehiko MIYOSHI
  • Publication number: 20150153751
    Abstract: A power supply circuit converts an input electric power into a target voltage and outputs the target voltage is equipped with a power semiconductor element that is connected between an input and an output, a drive circuit that adjusts operation of the power semiconductor element on the basis of a result of a comparison between an output voltage of the power supply circuit and a threshold voltage based on a first reference voltage, and a first monitoring circuit that compares the output voltage with a normal range based on a second reference voltage and outputs a first signal when the output voltage is deviant from the normal range. In addition, the first reference voltage and the second reference voltage are generated in different reference voltage generation circuits.
    Type: Application
    Filed: March 5, 2013
    Publication date: June 4, 2015
    Applicants: DENSO CORPORATION, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Eiichiro Shigehara, Keisuke Hata, Junichi Fukuta, Tomohisa Ose, Yusuke Shindo
  • Patent number: 8994437
    Abstract: A semiconductor device outputs a signal to control a gate potential a switching device. The semiconductor device includes a first signal output terminal, and is capable of receiving or internally creating a reference signal, which varies between a first potential and a second potential. The semiconductor device can switch between first and second operations. The first operation outputs to the first signal output terminal a signal that is at a third potential when the reference signal is at the first potential, and that is at a fourth potential higher than the third potential when the reference signal is at the second potential. The second operation outputs to the first signal output terminal a signal that is at the fourth potential when the reference signal is at the first potential, and that is at the third potential when the reference signal is at the second potential.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: March 31, 2015
    Assignees: Toyota Jidosha Kabushiki Kaisha, Denso Corporation
    Inventors: Keisuke Hata, Tsuneo Maebara