Patents by Inventor Kenji Uchida

Kenji Uchida 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: 11891973
    Abstract: An engine system is provided, which includes a cylinder block, a cylinder head, a piston, a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, and a controller electrically connected to the injector, the main spark plug and the subspark plug. When an engine speed is above a given reference engine speed, the controller controls, in a low-load range below a given reference load, the ignition devices so that the subignition is performed after the main ignition, and the controller controls, in a high-load range exceeding the reference load, the ignition devices so that only the subignition is performed, or so that the main ignition is performed at the same timing as or after the subignition.
    Type: Grant
    Filed: July 18, 2022
    Date of Patent: February 6, 2024
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida
  • Patent number: 11834981
    Abstract: To meet both a request to improve the thermal efficiency in the medium load operation of an engine and a request to suppress knocking in the high load and high rotation operation of the engine, the engine includes a main combustion chamber including a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that are open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24. A second index that is a product between a volume of the pre-chamber and the compression ratio is not less than 1.03 cm3 and not more than 5.92 cm3.
    Type: Grant
    Filed: November 16, 2022
    Date of Patent: December 5, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Patent number: 11821353
    Abstract: To meet both a request to improve the thermal efficiency in medium load operation of an engine and a request to suppress knocking in high load operation of the engine, the engine includes a main combustion chamber including a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24, an aperture ratio, which is the ratio of a total cross-sectional area of the plurality of injection holes to a volume of the pre-chamber, is not less than 0.0078 mm?1 and not more than 0.0145 mm?1, and the volume of the pre-chamber 15 is not less than 0.0430 cm3 and not more than 0.5631 cm3.
    Type: Grant
    Filed: November 15, 2022
    Date of Patent: November 21, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono
  • Patent number: 11767817
    Abstract: An engine system is provided, which includes a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, an exhaust gas recirculation (EGR) device and a control device. In a specific range where EGR is performed, the ignition devices are controlled so that a subignition timing is retarded from a main ignition timing, and an ignition phase difference that is a retard amount of the subignition timing from the main ignition timing becomes larger under a high EGR condition than a low EGR condition, the EGR conditions being conditions in the specific range where engine speeds are the same and EGR rates are different, and the high EGR condition being larger in the EGR rate than the low EGR condition.
    Type: Grant
    Filed: July 20, 2022
    Date of Patent: September 26, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida
  • Patent number: 11767816
    Abstract: An engine system is provided, which includes a cylinder block, a cylinder head, a piston, a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, and a controller electrically connected to the injector and the main spark plug and the subspark plug. In a low-load range where an engine load is below a given reference load, the controller controls the main spark plug and the subspark plug so that the subignition is performed after performing the main ignition, and the controller retards the timing of the subignition in a high-speed range where an engine speed is above a given reference engine speed, compared with a low-speed range below the reference engine speed.
    Type: Grant
    Filed: July 19, 2022
    Date of Patent: September 26, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida
  • Patent number: 11753985
    Abstract: To meet both a request to improve the thermal efficiency in the medium load operation of an engine and a request to suppress knocking in the high load and high rotation operation of the engine, the engine includes a main combustion chamber comprising a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24. A first index, which is the product between a total cross-sectional area of the plurality of injection holes and the compression ratio, is not less than 0.1496 cm2 and not more than 0.8449 cm2.
    Type: Grant
    Filed: November 15, 2022
    Date of Patent: September 12, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Patent number: 11725950
    Abstract: A navigation request is detected. The navigation request includes a destination for an autonomous vehicle from a starting location. A route is identified from the starting location to destination based on the navigation request. A regulator lookup is performed related to the route based on the navigation request. The regulator lookup is related to an owner of privacy data for one or more regulators. In response to the regulator lookup, a conditional allowance related to the route is received. The conditional allowance indicates that one or more autonomous vehicle sensors of the autonomous vehicle may not capture data related to a first property of a first regulator. the first property is located proximate to the route. The one or more autonomous vehicles sensors of the autonomous vehicle are restricted in response to the conditional allowance.
    Type: Grant
    Filed: October 24, 2020
    Date of Patent: August 15, 2023
    Assignee: International Business Machines Corporation
    Inventors: Kenji Uchida, Daisuke Maruyama
  • Patent number: 11692477
    Abstract: An engine system is provided, which includes a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, and a subspark plug that ignites the mixture gas inside the subchamber, an throttle valve, and a control device. In a first range, compression self-ignition combustion of the mixture gas inside the main combustion chamber is performed. In a second range, flame propagation combustion is performed while setting an air-fuel ratio of the mixture gas lower than that in the first range. Immediately after the transition from the first range to the second range, only the subignition is performed, or the subignition and the main ignition are performed while setting a timing of the main ignition to a timing same as or retarded from the subignition.
    Type: Grant
    Filed: July 21, 2022
    Date of Patent: July 4, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida
  • Patent number: 11686243
    Abstract: An engine system is provided, which includes a cylinder block, a cylinder head, a piston, a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, and a control device. In a low-speed high-load range, a fuel injection timing is set in compression stroke and the main ignition and the subignition are performed after the fuel injection timing, and the fuel injection timing under a low-speed condition becomes later than that under a high-speed condition, and the ignition devices are controlled so that the subignition timing is retarded from the main ignition timing and an ignition phase difference that is the retard amount of the subignition timing becomes larger under the low-speed condition than under the high-speed condition.
    Type: Grant
    Filed: July 14, 2022
    Date of Patent: June 27, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida
  • Publication number: 20230184159
    Abstract: To meet both a request to improve the thermal efficiency in medium load operation of an engine and a request to suppress knocking in high load operation of the engine, the engine includes a main combustion chamber including a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24, an aperture ratio, which is the ratio of a total cross-sectional area of the plurality of injection holes to a volume of the pre-chamber, is not less than 0.0078 mm-1 and not more than 0.0145 mm-1, and the volume of the pre-chamber 15 is not less than 0.0430 cm3 and not more than 0.5631 cm3.
    Type: Application
    Filed: November 15, 2022
    Publication date: June 15, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono
  • Publication number: 20230175426
    Abstract: To meet both a request to improve the thermal efficiency in the medium load operation of an engine and a request to suppress knocking in the high load and high rotation operation of the engine, the engine includes a main combustion chamber comprising a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24. A first index, which is the product between a total cross-sectional area of the plurality of injection holes and the compression ratio, is not less than 0.1496 cm2 and not more than 0.8449 cm2.
    Type: Application
    Filed: November 15, 2022
    Publication date: June 8, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Publication number: 20230175427
    Abstract: To meet both a request to improve the thermal efficiency in the medium load operation of an engine and a request to suppress knocking in the high load and high rotation operation of the engine, the engine includes a main combustion chamber including a cylinder block, a cylinder head, and a piston; a pre-chamber having a plurality of injection holes that are open into the main combustion chamber; and a spark plug that ignites an air-fuel mixture in the pre-chamber. A compression ratio of the main combustion chamber is not less than 14 and not more than 24. A second index that is a product between a volume of the pre-chamber and the compression ratio is not less than 1.03 cm3 and not more than 5.92 cm3.
    Type: Application
    Filed: November 16, 2022
    Publication date: June 8, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Publication number: 20230175425
    Abstract: To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chamber. The specific ratio obtained by dividing a volume of the sub-chamber by a stroke volume of a cylinder is greater than or equal to 0.00005 and less than or equal to 0.00045.
    Type: Application
    Filed: November 18, 2022
    Publication date: June 8, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Publication number: 20230175429
    Abstract: To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber 6 includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chamber having through-holes. The specific ratio obtained by dividing the ratio ?p/Vpc of a hole diameter ?p of the through-holes to a volume Vpc of the sub-chamber by a compression ratio is greater than or equal to 0.26 mm/cm3 and less than or equal to 2.30 mm/cm3.
    Type: Application
    Filed: November 21, 2022
    Publication date: June 8, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Kazuhiro Nagatsu
  • Publication number: 20230175428
    Abstract: To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chamber. The specific ratio obtained by dividing a bore/stroke ratio of a cylinder by the volume of the sub-chamber is greater than or equal to 6.6 cm?3 and less than or equal to 57.6 cm?3.
    Type: Application
    Filed: November 17, 2022
    Publication date: June 8, 2023
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Publication number: 20230159554
    Abstract: A compound having anticancer activity, or a pharmaceutically acceptable salt thereof is provided. Used is a compound represented by the following formula (I) or a pharmaceutically acceptable salt thereof: (wherein, L1 and L2 are the same or different and each represents a group represented by one formula selected from the group consisting of formulas (A) to (F), and S represents a group represented by one formula selected from the group consisting of formulas (S1) to (S18)).
    Type: Application
    Filed: January 25, 2023
    Publication date: May 25, 2023
    Applicant: KYOWA KIRIN CO., LTD.
    Inventors: Kenji UCHIDA, Ryohei KAWAI, Keisuke YAMAMOTO, Toshimi KANAI, Hideo IKOTA, Takashi IMAEDA, Kei YOSHIDA
  • Patent number: 11655751
    Abstract: To effectively suppress strong knock that occurs in the operating region of high load and high rotation in a specific engine having a pre-chamber in a combustion chamber, the engine includes a piston that defines a combustion chamber together with a cylinder block and a cylinder head. The combustion chamber includes a sub-chamber and a main chamber separated from the sub-chamber by a pre-chamber. The specific ratio obtained by dividing a volume of the sub-chamber by a stroke volume of a cylinder is greater than or equal to 0.00005 and less than or equal to 0.00045.
    Type: Grant
    Filed: November 18, 2022
    Date of Patent: May 23, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Yuji Harada, Kenji Uchida, Ryohei Ono, Masayuki Kidokoro, Kazuhiro Nagatsu
  • Patent number: 11629152
    Abstract: A compound having anticancer activity, or a pharmaceutically acceptable salt thereof is provided. Used is a compound represented by the following formula (I) or a pharmaceutically acceptable salt thereof: (wherein, L1 and L2 are the same or different and each represents a group represented by one formula selected from the group consisting of formulas (A) to (F), and S represents a group represented by one formula selected from the group consisting of formulas (S1) to (S18)).
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: April 18, 2023
    Assignee: KYOWA KIRIN CO., LTD.
    Inventors: Kenji Uchida, Ryohei Kawai, Keisuke Yamamoto, Toshimi Kanai, Hideo Ikota, Takashi Imaeda, Kei Yoshida
  • Patent number: 11603109
    Abstract: A vehicle includes: an instrument panel that displays an alarm to a driver; and an ECU that controls the instrument panel based on a setting as to whether the driver is to perform maintenance of the vehicle or not. In a first setting in which the driver is to perform maintenance, the ECU controls the instrument panel to display an alarm when a failure occurs in an on-vehicle device. In a second setting in which the driver is not to perform maintenance, the ECU controls the instrument panel not to display an alarm about a failure less influencing traveling.
    Type: Grant
    Filed: May 7, 2020
    Date of Patent: March 14, 2023
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Takahiko Hirasawa, Tomoko Oba, Takaharu Hori, Kenji Uchida
  • Patent number: 11598245
    Abstract: An engine system is provided, which includes a cylinder block, a cylinder head, a piston, a main combustion chamber, a subchamber, an injector that injects fuel into the main combustion chamber, a main spark plug that ignites a mixture gas inside the main combustion chamber, a subspark plug that ignites the mixture gas inside the subchamber, and a controller electrically connected to the injector, the main spark plug and the subspark plug. When an engine load is above a given reference load, the controller controls, in a low-speed range below a given reference engine speed, the ignition devices so that the subignition is performed after the main ignition, and the controller controls, in a high-speed range exceeding the reference engine speed, the ignition devices so that only the subignition is performed, or so that the main ignition is performed at the same timing as or after the subignition.
    Type: Grant
    Filed: July 15, 2022
    Date of Patent: March 7, 2023
    Assignee: Mazda Motor Corporation
    Inventors: Ryohei Ono, Yuji Harada, Kenji Uchida