Patents by Inventor Toshimitsu Sakai

Toshimitsu Sakai 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: 20240052912
    Abstract: An engagement chain includes a pair of first and second chain members that are engaged so as to be integrated with each other by moving in an advancing direction and disengaged from each other so as to bifurcate by moving in a retreating direction from the integrated engaged state. A first link plate of the first chain member includes first and second pin holes through which a coupling pin is inserted. A second link plate of the second chain member includes first and second pin holes through which a coupling pin is inserted. A first distance between the first and second pin holes of the first link plate is shorter than a second distance between the first and second pin holes of the second link plate.
    Type: Application
    Filed: October 8, 2020
    Publication date: February 15, 2024
    Applicants: TSUBAKIMOTO CHAIN CO., TSUBAKIMOTO KOGYO CO., LTD.
    Inventors: Ryuta Shoji, Tamaki Shiki, Shunji Sakura, Toshimitsu Sakai
  • Publication number: 20230202553
    Abstract: A steer-by-wire rudder system includes a first system having a first motor unit that drives a rudder mechanism and a first control unit that controls the first motor unit, and a second system having a second motor unit that drives the rudder mechanism and a second control unit that controls the second motor unit. The first control unit and the second control unit perform cooperative control for controlling the first motor unit and the second control unit to cooperate with each other. When the cooperative control is not performed, one of the control of the first motor unit by the first control unit and the control of the second motor unit by the second control unit continues, and the other thereof stops.
    Type: Application
    Filed: February 22, 2023
    Publication date: June 29, 2023
    Inventors: KURUMI TAZUKE, HIROKI TOMIZAWA, HISASHI KAMEYA, TOSHIMITSU SAKAI, MASAHARU YAMASHITA, KENJI SHIBATA, YOSUKE YAMASHITA, SHINTARO TAKAYAMA, TOSHIHIRO TAKAHASHI, YUJI FUJITA, KENICHI ABE, YUGO NAGASHIMA
  • Patent number: 11597434
    Abstract: An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: March 7, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Masaharu Yamashita, Atsushi Sato, Masataka Okuda, Yosuke Yamashita, Shintaro Takayama, Shunsuke Hiromasa, Toshiyuki Mikida, Shoji Kubota, Yuji Fujita, Kenichi Abe, Toshimitsu Sakai
  • Patent number: 11565746
    Abstract: An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.
    Type: Grant
    Filed: April 15, 2020
    Date of Patent: January 31, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Masaharu Yamashita, Atsushi Sato, Masataka Okuda, Yosuke Yamashita, Shintaro Takayama, Shunsuke Hiromasa, Toshiyuki Mikida, Shoji Kubota, Yuji Fujita, Kenichi Abe, Toshimitsu Sakai
  • Patent number: 11557493
    Abstract: A substrate cleaning apparatus, includes a vaporizer configured to generate water vapor, a first heating part configured to heat a nitrogen gas to a first temperature, a second heating part configured to heat the nitrogen gas to a second temperature, wherein the second temperature is higher than the first temperature, and at least one cleaning chamber connected to the vaporizer, the first heating part, and the second heating part, wherein the at least one cleaning chamber is configured so that at least one substrate is exposed to the water vapor, the nitrogen gas having the first temperature, or the nitrogen gas having the second temperature under an atmospheric pressure.
    Type: Grant
    Filed: November 18, 2020
    Date of Patent: January 17, 2023
    Assignee: TOKYO ELECTRON LIMITED
    Inventors: Toshimitsu Sakai, Keiko Hada
  • Patent number: 11554809
    Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: January 17, 2023
    Assignee: DENSO CORPORATION
    Inventors: Atsuko Oka, Shuji Kuramitsu, Koichi Nakamura, Yuki Watanabe, Toshihiro Fujita, Takaharu Kozawa, Shuhei Miyachi, Katsuhiko Hayashi, Masaya Taki, Toshimitsu Sakai
  • Patent number: 11529990
    Abstract: An ECU, which is a signal control apparatus, has a plurality of control units, which control one same motor. Steering angle calculation units acquire sensor signals from the angle sensors provided corresponding to the steering angle calculation units, respectively, and calculate the steering angles in correspondence to the sensor signals. The angle FB units perform the angle FB control based on the angle differences, which are between the target angle and the steering angle and between the target angle and the steering angle, respectively. In the angular FB unit of at least one of the control units, the angular feedback control is performed using the angle difference, which is subjected to the correction processing to reduce the error between the detection angle of the own system and the detection angle of the other system calculated by the steering angle calculation unit of the other control unit.
    Type: Grant
    Filed: March 11, 2019
    Date of Patent: December 20, 2022
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Toshihiro Fujita, Shuji Kuramitsu, Koichi Nakamura, Toshimitsu Sakai
  • Patent number: 11518435
    Abstract: An ECU includes a plurality of motor driving circuits for driving at least one motor, a plurality of computers and a plurality of clock circuits. A first computer, which is at a synchronization signal transmission-side, transmits a synchronization signal to a second computer, which is at a synchronization signal reception-side. The first computer and the second computer execute a plurality of specific periodic processes, which are processes executed at cycle periods (for example, 200 ?s, 400 ?s) of different natural number multiples of a cycle period (for example, 200 ?s) of the synchronization signal and need be synchronized. Each timing of the plurality of specific periodic processes is determined based on one synchronization signal.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: December 6, 2022
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Koichi Nakamura, Toshimitsu Sakai, Nobuyori Nakajima
  • Patent number: 11465683
    Abstract: A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: October 11, 2022
    Assignee: DENSO CORPORATION
    Inventors: Takaharu Kozawa, Shuji Kuramitsu, Koichi Nakamura, Yuki Watanabe, Atsuko Oka, Toshihiro Fujita, Shuhei Miyachi, Masaya Taki, Toshimitsu Sakai, Katsuhiko Hayashi
  • Patent number: 11242087
    Abstract: A synchronization signal generating portion of a transmitter microcomputer generates a synchronization signal that is synchronized with a drive timing of the own microcomputer and also causes to synchronize the drive timing of microcomputers, and transmits to a receiver microcomputer. A timing corrector of the receiver microcomputer is capable of correcting the drive timing of the own microcomputer so as to synchronize with the received synchronization signal, and includes a timing determiner which determines whether the received synchronization signal is normal or abnormal. The receiver microcomputer permits the timing correction if the synchronization signal is determined to be normal in the timing determination, and prohibits timing correction and drives the motor asynchronously with the transmitter microcomputer if the synchronization signal is determined to be abnormal.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: February 8, 2022
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Shuji Kuramitsu, Koichi Nakamura, Toshimitsu Sakai
  • Patent number: 11091201
    Abstract: In a rotation detecting apparatus, each of first and second sensor elements measures rotation of a detection target. A circuit module includes first and second rotational angle calculators each calculating, based on a corresponding one of a first measurement value of the first sensor element and a second measurement value of the second sensor element, a rotational angle of the detection target. The circuit module includes first and second rotation number calculators each calculating, based on the corresponding one of the first measurement value and the second measurement value, a rotation number of the detection target. The circuit module includes first and second communicators each outputting, to a controller, a rotational angle signal based on the rotational angle and a rotation number signal based on the rotation number. A package packages the first and second sensor elements, and is mounted to a circuit board separately from the controller.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: August 17, 2021
    Assignee: DENSO CORPORATION
    Inventors: Toshihiro Fujita, Katsuhiko Hayashi, Takaharu Kozawa, Shuhei Miyachi, Koichi Nakamura, Yuki Watanabe, Atsuko Oka, Shuji Kuramitsu, Toshimitsu Sakai, Masaya Taki
  • Publication number: 20210159096
    Abstract: A substrate cleaning apparatus, includes a vaporizer configured to generate water vapor, a first heating part configured to heat a nitrogen gas to a first temperature, a second heating part configured to heat the nitrogen gas to a second temperature, wherein the second temperature is higher than the first temperature, and at least one cleaning chamber connected to the vaporizer, the first heating part, and the second heating part, wherein the at least one cleaning chamber is configured so that at least one substrate is exposed to the water vapor, the nitrogen gas having the first temperature, or the nitrogen gas having the second temperature under an atmospheric pressure.
    Type: Application
    Filed: November 18, 2020
    Publication date: May 27, 2021
    Inventors: Toshimitsu SAKAI, Keiko HADA
  • Patent number: 10862417
    Abstract: A rotary electric device control device controls driving of a rotary electric device including a plurality of winding sets. The rotary electric device control device includes: a plurality of drive circuits; and a plurality of control units. The control units include signal output units for outputting control signals to the drive circuits corresponding to the control units, respectively, and communicate with each other. The control units include: one master control unit; and at least one slave control unit. An electric power steering device includes: a rotary electric device control device; the rotary electric device that outputs an assist torque for assisting a steering operation of a steering wheel by a driver; and a power transmission unit that transmits a driving force of the rotary electric device to a drive target.
    Type: Grant
    Filed: May 7, 2019
    Date of Patent: December 8, 2020
    Assignee: DENSO CORPORATION
    Inventors: Shuji Kuramitsu, Koichi Nakamura, Atsuko Oka, Masaya Taki, Hideki Kabune, Yuki Watanabe, Toshimitsu Sakai, Yosuke Ogi
  • Publication number: 20200331522
    Abstract: An actuator that applies force to a member associated with steering, and a control device that controls the actuator, have duplex configuration. First and second control devices compute the same controlled variable as first and second controlled variables, respectively. In a normal mode, the control device controls the actuator according to the first controlled variable. The first and second control devices send and receive respectively computed controlled variables to and from each other via communications. When a discrepancy arises between the first and second controlled variables, or an abnormality occurs in communications between the first and second control devices, the operating mode is switched from the normal mode to an independent mode. In the independent mode, the first and second control devices control the first and second actuators, according to the first and second controlled variables, respectively.
    Type: Application
    Filed: April 15, 2020
    Publication date: October 22, 2020
    Applicants: Toyota Jidosha Kabushiki Kaisha, JTEKT Corporation, Denso Corporation
    Inventors: Masaharu Yamashita, Atsushi Sato, Masataka Okuda, Yosuke Yamashita, Shintaro Takayama, Shunsuke Hiromasa, Toshiyuki Mikida, Shoji Kubota, Yuji Fujita, Kenichi Abe, Toshimitsu Sakai
  • Patent number: 10759470
    Abstract: A sensor device includes a sensor section having a plurality of sensor elements sensing a physical quantity regarding a magnetic flux collecting module, an output circuit generating and outputting an output signal including data signals respectively corresponding to sensing values from the sensor elements, and an ECU obtaining the output signal. The ECU includes an abnormality determiner identifying an abnormal sensor element. When at least two of the plurality of sensor sections respectively have at least one normal sensor element, a sub-sensor section transmits the output signal therefrom to the ECU at a shifted output timing from an output timing of the output signal from a main sensor section. The amount of such a shift of the output timing is shorter than one signal cycle of the output signal.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: September 1, 2020
    Assignee: DENSO CORPORATION
    Inventors: Shuji Kuramitsu, Katsuhiko Hayashi, Takaharu Kozawa, Koichi Nakamura, Masaya Taki, Toshimitsu Sakai
  • Patent number: 10668945
    Abstract: A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: June 2, 2020
    Assignee: DENSO CORPORATION
    Inventors: Masaya Taki, Toshimitsu Sakai, Koichi Nakamura, Shuji Kuramitsu
  • Patent number: 10654518
    Abstract: A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: May 19, 2020
    Assignee: DENSO CORPORATION
    Inventors: Toshimitsu Sakai, Masaya Taki, Shuji Kuramitsu, Koichi Nakamura
  • Publication number: 20200047806
    Abstract: A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.
    Type: Application
    Filed: October 16, 2019
    Publication date: February 13, 2020
    Inventors: Takaharu KOZAWA, Shuji KURAMITSU, Koichi NAKAMURA, Yuki WATANABE, Atsuko OKA, Toshihiro FUJITA, Shuhei MIYACHI, Masaya TAKI, Toshimitsu SAKAI, Katsuhiko HAYASHI
  • Publication number: 20200047805
    Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.
    Type: Application
    Filed: October 16, 2019
    Publication date: February 13, 2020
    Inventors: Atsuko OKA, Shuji KURAMITSU, Koichi NAKAMURA, Yuki WATANABE, Toshihiro FUJITA, Takaharu KOZAWA, Shuhei MIYACHI, Katsuhiko HAYASHI, Masaya TAKI, Toshimitsu SAKAI
  • Patent number: 10486735
    Abstract: In a rotation detecting apparatus, while a switch is in an on state so that electrical power is supplied from a power source to a controller via the switch, the controller receives, as a first output signal, an output signal output from an output unit of a first rotation sensor, and receives, as a second output signal, an output signal output from an output unit of the second rotation sensor. The first output signal includes at least the first rotational information and the second rotational information based on the first rotation sensor, and the second output signal includes at least the first rotational information and the second rotational information based on the second rotation sensor. The controller determines whether there is a malfunction in each of the first and second rotation sensors as a function of the first output signal and the second output signal.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: November 26, 2019
    Assignee: DENSO CORPORATION
    Inventors: Toshihiro Fujita, Takaharu Kozawa, Shuhei Miyachi, Katsuhiko Hayashi, Shuji Kuramitsu, Koichi Nakamura, Yuki Watanabe, Atsuko Oka, Masaya Taki, Toshimitsu Sakai