Patents by Inventor Kota FUJII

Kota FUJII 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: 12085555
    Abstract: A deterioration estimation device includes a storage device and an execution device. The storage device is configured to store mapping data defining a mapping that outputs an output variable indicating the degree of deterioration of oil when an input variable is input. The mapping includes, as the input variable, a color variable that is a variable indicating a color of the oil and a hydrogen ion variable that is a variable indicating a hydrogen ion concentration of the oil. The execution device is configured to execute an acquisition process that is a process of acquiring the input variable and a calculation process of inputting the input variable acquired through the acquisition process to the mapping to output a value of the output variable.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: September 10, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Ken Imamura, Kota Fujii, Koichi Okuda
  • Patent number: 12033443
    Abstract: An abnormality cause determining device that is applied to a vehicle including an electromagnetic actuator includes a storage device and an execution device. The storage device is configured to store map data which is data for defining a map. The map includes a current variable which is a variable indicating a current flowing actually in the electromagnetic actuator as an input variable and includes a cause variable which is a variable indicating a cause of an abnormality of an onboard unit including the electromagnetic actuator as an output variable. The execution device is configured to perform an acquisition process of acquiring a value of the input variable based on a detection value from a sensor which is mounted in the vehicle and a calculation process of calculating a value of the output variable by inputting the value of the input variable to the map.
    Type: Grant
    Filed: June 14, 2021
    Date of Patent: July 9, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Ken Imamura, Shinichi Ito, Kota Fujii
  • Patent number: 12026992
    Abstract: A vehicle control device performs learning to correct a parameter used in a control program for controlling a vehicle. The vehicle control device stores learning data obtained by the learning in a storage unit. The vehicle control device determines whether or not a part controlled by the parameter has been replaced, and resets the learning data stored in the storage unit when it is determined that the part has been replaced. The vehicle control device determines that the part has been replaced based on an adjustment that is performed upon replacement of the part. The vehicle control device quickly mitigates degradation of the controllability of the vehicle after replacement of the part.
    Type: Grant
    Filed: November 30, 2020
    Date of Patent: July 2, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Hiromasa Tatsushiro, Kota Fujii, Yuuki Makino
  • Patent number: 11959545
    Abstract: A vehicle control device includes a processor and memory. The memory stores relation-defining data for defining a relation between a state of a vehicle and an action variable that is a variable relating to operations of a transmission installed in the vehicle. The processor is configured to execute acquisition processing, operation processing, reward calculation processing, updating processing, counting processing, and limiting processing. The processor is configured to output the relation-defining data updated so that an expected income is increased when the transmission is operated following the relation-defining data, based on an updating map.
    Type: Grant
    Filed: May 25, 2021
    Date of Patent: April 16, 2024
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Bunazawa, Atsushi Tabata, Koichi Okuda, Ken Imamura, Kota Fujii, Keita Sasaki
  • Publication number: 20240120192
    Abstract: A method of cleaning a silicon wafer in which the silicon wafer is roughened, including: forming an oxide film on the silicon wafer by SC1 cleaning, SC2 cleaning, or ozone water cleaning; cleaning the silicon wafer on which the oxide film is formed by using any one of: a diluted aqueous solution of ammonium hydroxide having an ammonium hydroxide concentration of 0.051% by mass or less; or a diluted aqueous solution containing ammonium hydroxide and hydrogen peroxide water and having an ammonium hydroxide concentration of 0.051% by mass or less and a hydrogen peroxide concentration of 0.2% by mass or less, the hydrogen peroxide concentration being four times or less the ammonium hydroxide concentration, to roughen front and rear faces of the silicon wafer.
    Type: Application
    Filed: February 21, 2022
    Publication date: April 11, 2024
    Applicant: SHIN-ETSU HANDOTAI CO., LTD.
    Inventors: Kota FUJII, Tatsuo ABE
  • Patent number: 11725726
    Abstract: A vehicle anomaly analysis apparatus for analyzing an anomaly having occurred in a shift control operation executed in an automatic transmission of a vehicle, by using a rotational speed changed in process of the shift control operation. The vehicle anomaly analysis apparatus specifies cause of the anomaly in the shift control operation, by applying an anomaly-cause specifying model that indicates a relationship between a manner of chronological change of a racing amount and the cause of the anomaly in the shift control operation, to the manner of the chronological change of the racing amount upon occurrence of the anomaly in the shift control operation. The racing amount is an amount of increase of the rotational speed in the process of the shift control operation, relative to a reference rotational speed that is based on a gear ratio and an output rotational speed of the automatic transmission.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: August 15, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Hiromasa Tatsushiro, Kota Fujii
  • Patent number: 11692623
    Abstract: An actuator unit that drives a switching mechanism for a shift range of an automatic transmission is provided. The actuator unit includes a motor that generates a drive force for driving the switching mechanism, a control substrate that controls the motor, a connector that connects a wire to the control substrate, a housing that includes an opening, a cover that covers the opening, and a shock absorption material that includes a first shock absorption material and a second shock absorption material. The motor and the control substrate are positioned in a housing space defined by the housing and the cover. The control substrate is fixed to the housing. The first shock absorption material and the second shock absorption material are positioned between the control substrate and the cover, and contacts both the control substrate and the cover.
    Type: Grant
    Filed: January 25, 2022
    Date of Patent: July 4, 2023
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN CORPORATION
    Inventors: Masashi Sasaki, Atsushi Kamada, Kota Fujii, Daisuke Kikukawa, Shinya Kuwahara, Keiji Suzumura
  • Patent number: 11674946
    Abstract: An oil condition estimation apparatus to be applied to a vehicle in which oil is agitated by a rotator includes a storage device and an execution device. The storage device stores mapping data for defining mapping. The mapping includes, as input variables, a speed variable indicating a rotation speed of the rotator, and a pressure variable indicating a pressure of the oil, and includes, as an output variable, an air bubble variable related to air bubbles contained in the oil. The execution device executes an acquisition process for acquiring values of the input variables, and a calculation process for calculating a value of the output variable by inputting, to the mapping, the values of the input variables acquired through the acquisition process.
    Type: Grant
    Filed: March 23, 2021
    Date of Patent: June 13, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Koichi Okuda, Atsushi Tabata, Kota Fujii, Ken Imamura
  • Patent number: 11649892
    Abstract: A hydraulic pressure calculation apparatus is applied to a gear shifting system including a transmission configured to switch between a connected state and a disconnected state of a friction engagement element depending on a hydraulic pressure supplied from a hydraulic circuit, and a hydraulic controller configured to control the hydraulic circuit. The hydraulic pressure calculation apparatus includes a memory and a processor. The memory stores pieces of mapping data of a plurality of phases obtained by dividing a period from a start to an end of switching between the connected state and the disconnected state of the friction engagement element. Each piece of the mapping data defines a mapping. The processor is configured to output, as an output variable, an estimated hydraulic pressure variable indicating an estimated value of an actual hydraulic pressure supplied from the hydraulic circuit to the friction engagement element.
    Type: Grant
    Filed: July 1, 2021
    Date of Patent: May 16, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Koichi Okuda, Ken Imamura, Hideaki Bunazawa, Keita Sasaki
  • Patent number: 11614131
    Abstract: An apparatus to be applied to a vehicle including a transmission configured to execute a gear shifting operation for changing a gear ratio by engaging or disengaging friction engagement elements having friction members pushed by a piston that moves through hydraulic pressure supply to an oil chamber, the apparatus including: a memory storing mapping data for defining mapping, the mapping including a pressure variable and a period variable as input variables, the mapping including a stroke amount as an output variable, the pressure variable indicating a waiting pressure, the period variable indicating a waiting period; and a processor configured to: acquire values of the input variables, and calculate a value of the output variable by inputting, to the mapping, the acquired values of the input variables.
    Type: Grant
    Filed: July 8, 2021
    Date of Patent: March 28, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Kota Fujii, Ken Imamura
  • Patent number: 11586985
    Abstract: A vehicle control apparatus for controlling a vehicle through a control program using at least one parameter. The at least one parameter is corrected by respective at least one correction value that is obtained after start of execution of a learning operation. The vehicle control apparatus includes: a learning-data storage portion configured to store, as learning data, the at least one correction value obtained after the start of the execution of the learning operation; and a learning-data rewrite portion configured, when the control program is updated, to execute a rewriting operation for rewriting the at least one correction value as the learning data from a pre-update correction value to a post-update correction value, such that the post-update correction value has the same sign as the pre-update correction value, and an absolute value of the post-update correction value is smaller than an absolute value of the pre-update correction value.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: February 21, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Tooru Matsubara, Hiromasa Tatsushiro, Kota Fujii, Yuuki Makino
  • Patent number: 11566966
    Abstract: There is provided a method of specifying a location of occurrence of an abnormal sound, the method including: storing mapping data in a storage device, the mapping data prescribing mapping that receives, as inputs, a sound variable that matches a sound detected in a vehicle and a state variable of a drive-system device of the vehicle synchronized with the sound, and that outputs a location as a main cause of the sound; executing a sound signal acquisition process of acquiring a sound signal output from a microphone that detects a sound; a state variable acquisition process of acquiring the state variable of the drive-system device; and a specifying process of specifying the location of occurrence of the sound corresponding to the sound signal using the sound variable and the state variable as inputs to the mapping. There are also provided a non-transitory storage medium and an in-vehicle device.
    Type: Grant
    Filed: January 25, 2021
    Date of Patent: January 31, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Kota Fujii, Ken Imamura
  • Patent number: 11519495
    Abstract: A heat load estimation device for a friction engaging element that estimates a heat load when at least one of a temperature, a heat generation amount, and presence or absence of seizure in the friction engaging element at a time of shifting of the transmission is regarded as the heat load, includes a storage device and an execution device. The storage device stores mapping data defining mapping. The mapping includes, as an input variable, a speed variable that is a variable indicating a relative rotation speed of members of the friction engaging element and a hydraulic pressure variable that is a variable indicating hydraulic pressure during the shifting of the transmission, and includes, as an output variable, the heat load. The execution device executes a calculation process for calculating a value of the output variable and a change process for changing an execution mode of the calculation process.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: December 6, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Koichi Okuda, Ken Imamura, Hideaki Bunazawa, Keita Sasaki
  • Publication number: 20220307593
    Abstract: An actuator unit that drives a switching mechanism for a shift range of an automatic transmission is provided. The actuator unit includes a motor that generates a drive force for driving the switching mechanism, a control substrate that controls the motor, a connector that connects a wire to the control substrate, a housing that includes an opening, a cover that covers the opening, and a shock absorption material that includes a first shock absorption material and a second shock absorption material. The motor and the control substrate are positioned in a housing space defined by the housing and the cover. The control substrate is fixed to the housing. The first shock absorption material and the second shock absorption material are positioned between the control substrate and the cover, and contacts both the control substrate and the cover.
    Type: Application
    Filed: January 25, 2022
    Publication date: September 29, 2022
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN CORPORATION
    Inventors: Masashi SASAKI, Atsushi KAMADA, Kota FUJII, Daisuke KIKUKAWA, Shinya KUWAHARA, Keiji SUZUMURA
  • Patent number: 11441670
    Abstract: Because an EOP starts operating from when a decrease in discharge flow rate of an MOP is predicted or detected, a PL actual pressure that should be obtained with a PL command pressure set to a value for a required transmission torque is more easily maintained even when the discharge flow rate of the MOP becomes insufficient. After a lapse of a predetermined period of time from the start of operation of the EOP, the PL command pressure is temporarily set to a value higher than the value for the required transmission torque, and a regulator valve is controlled to operate to close a drain port. Therefore, the operation of the EOP in a high PL actual pressure is reduced, and a delay in response of a pressure regulating operation of the regulator valve in the process of reduction of the discharge flow rate of the MOP is reduced.
    Type: Grant
    Filed: September 28, 2020
    Date of Patent: September 13, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Yuki Makino, Toshiaki Tamachi, Koji Hayashi, Tooru Matsubara, Ken Fujimoto, Masato Nakano
  • Patent number: 11421781
    Abstract: An oil pressure learning method of an automatic transmission includes acquiring a state of a vehicle in a state where relational regulation data is stored, supplying oil to the automatic transmission such that the value of the oil pressure is set to an oil pressure command value, calculating, as a specific variable, a variable representing an amount in which a detected input rotation speed exceeds a target input rotation speed, or the like, calculating a reward in a manner in which it has a larger value when the specific variable satisfies a criterion than when it does not satisfy the criterion, updating the relational regulation data by inputting, to an update mapping, the reward and the oil pressure command value, and calculating a torque variable having a value that is increased as an amount of change in an input torque is increased.
    Type: Grant
    Filed: June 28, 2021
    Date of Patent: August 23, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Bunazawa, Atsushi Tabata, Koichi Okuda, Ken Imamura, Kota Fujii, Keita Sasaki
  • Patent number: 11420644
    Abstract: A vehicle control device includes: a storage device that stores relation-defining data that is data for defining a relation between a state of a vehicle and an action variable; and an executing device configured to acquire the state, operate a drivetrain device based on a value of the action variable, derive a reward such that the reward is larger when the state of the drivetrain device based on the acquired state satisfies a predetermined criterion, perform an updating of the relation-defining data using an updating map, and restrict the updating of the relation-defining data such that an updating amount of the relation-defining data is smaller when the drivetrain device is subject to a predetermined restriction.
    Type: Grant
    Filed: May 27, 2021
    Date of Patent: August 23, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hideaki Bunazawa, Atsushi Tabata, Koichi Okuda, Ken Imamura, Kota Fujii, Keita Sasaki
  • Patent number: 11415217
    Abstract: A device for a vehicle including: a memory configured to store mapping data including machine learning data defining a mapping that uses an estimation variable that is a variable indicating a vehicle operation status of the vehicle and a detection value of a sensor detecting an oil temperature of a power transmission device as input variables, and uses an element corresponding to the input variables as an output variable; and a processor configured to: acquire the input variables; use the mapping to acquire the element as the output variable of the mapping corresponding to the input variables; and determine based on the element whether the detection value becomes equal to or higher than a threshold value due to occurrence of an abnormality in the power transmission device or a mode of vehicle operation by the driver of the vehicle.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: August 16, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Koichi Okuda, Ken Imamura
  • Patent number: 11396943
    Abstract: A control device provided in a gear shifting device includes an electronic control unit. The electronic control unit determines whether an abnormality of the gear shifting device has occurred, performs a fail-safe process of switching the frictional engagement element corresponding to an abnormality to a disengaged state and fixing the gear shift ratio of the gear shifting device when it is determined that an abnormality has occurred, determines whether the abnormality has been relieved based on a behavior of an input signal at the time of operating a drive device of the frictional engagement element corresponding to an abnormality on condition that the frictional engagement element is maintained in the disengaged state after it is determined that the abnormality has occurred, and releases the fail-safe process when it is determined that the abnormality has been relieved.
    Type: Grant
    Filed: May 21, 2021
    Date of Patent: July 26, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Atsushi Tabata, Koichi Okuda, Kota Fujii, Ken Imamura
  • Patent number: 11378181
    Abstract: A temperature estimation device for friction engaging elements including an execution device and a storage device is provided. The storage device stores mapping data that defines mapping. The mapping includes, as an input variable, a heat amount variable that is a variable indicating an amount of heat generated by the friction engaging elements during the shifting of the transmission and a shifting variable indicating the friction engaging elements to be engaged at the time of the shifting of the transmission, and, as an output variable, the temperature. The execution device executes an acquisition process of acquiring a value of the input variable and a calculation process of inputting the value of the input variable acquired by the acquisition process into the mapping to calculate a value of the output variable.
    Type: Grant
    Filed: June 11, 2021
    Date of Patent: July 5, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kota Fujii, Atsushi Tabata, Koichi Okuda, Ken Imamura