Patents by Inventor Hiroaki Gotan

Hiroaki Gotan 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: 11951990
    Abstract: A gear shift control device of an automobile including a driving motor, a relay clutch capable of disconnecting an engine, includes memory storing a gear shift map for determining the switching start timing of the gear position, a transmission control unit that switches the gear position based on the gear shift map, a regeneration control unit, and a relay clutch control unit. The gear shift map includes a cooperative regeneration map and non-cooperative regeneration maps that define the thresholds of relatively low revolutions. The threshold of a predetermined low gear shift point is defined to be smaller than the thresholds of the gear shift points higher than the predetermined low gear shift point on the downshift side in the non-cooperative regeneration maps, and is defined to be smaller than the threshold of the predetermined low gear shift point on the downshift side in the cooperative regeneration map.
    Type: Grant
    Filed: March 27, 2023
    Date of Patent: April 9, 2024
    Assignee: Mazda Motor Corporation
    Inventors: Daigo Nishikori, Hiroaki Gotan, Akina Inagaki, Tomohiro Okubo, Kiminori Higo, Takayuki Mikami
  • Patent number: 11906042
    Abstract: A gear shift control device of an automobile includes memory storing a gear shift map that defines, for each of gear shift points, thresholds of the number of revolutions to determine a switching start timing of each of the gear positions, a transmission control unit that performs switching between the gear positions based on the gear shift map, and a regeneration control unit that controls regeneration. The gear shift map includes a non-cooperative regeneration map that defines the thresholds of revolutions lower than the thresholds in a cooperative request map used in cooperative regeneration, and the non-cooperative regeneration map includes a combustion request map that defines the thresholds of low revolutions and is used when an accelerator is not used, and a travel request map that defines the thresholds of relatively higher revolutions and is used when the accelerator is used.
    Type: Grant
    Filed: March 27, 2023
    Date of Patent: February 20, 2024
    Assignee: Mazda Motor Corporation
    Inventors: Daigo Nishikori, Hiroaki Gotan, Akina Inagaki, Tomohiro Okubo, Kiminori Higo, Takayuki Mikami
  • Publication number: 20230311895
    Abstract: A gear shift control device of an automobile including a driving motor, a relay clutch capable of disconnecting an engine, includes memory storing a gear shift map for determining the switching start timing of the gear position, a transmission control unit that switches the gear position based on the gear shift map, a regeneration control unit, and a relay clutch control unit. The gear shift map includes a cooperative regeneration map and non-cooperative regeneration maps that define the thresholds of relatively low revolutions. The threshold of a predetermined low gear shift point is defined to be smaller than the thresholds of the gear shift points higher than the predetermined low gear shift point on the downshift side in the non-cooperative regeneration maps, and is defined to be smaller than the threshold of the predetermined low gear shift point on the downshift side in the cooperative regeneration map.
    Type: Application
    Filed: March 27, 2023
    Publication date: October 5, 2023
    Inventors: Daigo Nishikori, Hiroaki Gotan, Akina Inagaki, Tomohiro Okubo, Kiminori Higo, Takayuki Mikami
  • Publication number: 20230313882
    Abstract: A gear shift control device of an automobile includes memory storing a gear shift map that defines, for each of gear shift points, thresholds of the number of revolutions to determine a switching start timing of each of the gear positions, a transmission control unit that performs switching between the gear positions based on the gear shift map, and a regeneration control unit that controls regeneration. The gear shift map includes a non-cooperative regeneration map that defines the thresholds of revolutions lower than the thresholds in a cooperative request map used in cooperative regeneration, and the non-cooperative regeneration map includes a combustion request map that defines the thresholds of low revolutions and is used when an accelerator is not used, and a travel request map that defines the thresholds of relatively higher revolutions and is used when the accelerator is used.
    Type: Application
    Filed: March 27, 2023
    Publication date: October 5, 2023
    Inventors: Daigo Nishikori, Hiroaki Gotan, Akina Inagaki, Tomohiro Okubo, Kiminori Higo, Takayuki Mikami
  • Patent number: 8263031
    Abstract: A method is provided for purifying exhaust gas from an engine having an exhaust passage with a selective reducing catalyst and an oxidation catalyst upstream of the selective reducing catalyst. The method calculates an amount of NOx that flows into the selective reducing catalyst; sets an amount of an additive agent to be supplied to the selective reducing catalyst based on the calculated amount of NOx; determines a degradation degree of the oxidation catalyst; determines whether a correction to the amount of the additive agent is necessary based on the determined degradation degree of the oxidation catalyst; corrects the amount of the additive agent to be supplied when the correction is necessary; and supplies the additive agent to the selective reducing catalyst in the corrected amount if the amount is determined to be corrected and in the uncorrected amount if the amount is determined not to be corrected.
    Type: Grant
    Filed: February 23, 2011
    Date of Patent: September 11, 2012
    Assignee: Mazda Motor Corporation
    Inventors: Hiroaki Gotan, Yoshiaki Tomita, Masashi Naono, Tamiharu Nakamura, Hiroaki Ishida
  • Publication number: 20110236280
    Abstract: A method is provided for purifying exhaust gas from an engine having an exhaust passage with a selective reducing catalyst and an oxidation catalyst upstream of the selective reducing catalyst. The method calculates an amount of NOx that flows into the selective reducing catalyst; sets an amount of an additive agent to be supplied to the selective reducing catalyst based on the calculated amount of NOx; determines a degradation degree of the oxidation catalyst; determines whether a correction to the amount of the additive agent is necessary based on the determined degradation degree of the oxidation catalyst; corrects the amount of the additive agent to be supplied when the correction is necessary; and supplies the additive agent to the selective reducing catalyst in the corrected amount if the amount is determined to be corrected and in the uncorrected amount if the amount is determined not to be corrected.
    Type: Application
    Filed: February 23, 2011
    Publication date: September 29, 2011
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Hiroaki Gotan, Yoshiaki Tomita, Masashi Naono, Tamiharu Nakamura, Hiroaki Ishida