Patents by Inventor Takeatsu ITO

Takeatsu ITO 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: 9970544
    Abstract: An engine control device to be mounted on a vehicle is provided. The control device includes a transmission state determining module for determining a connection between a stepped transmission and an engine, determining that a gear shift has started if the connection is disengaged from a connected state, and determining that the gear shift has finished if the connection is resumed, a gear position estimating module for estimating a gear position when the gear shift is determined to have started, a target engine speed specifying module for specifying a target engine speed based on the estimated gear position, and a speed control module for controlling an engine speed to the target engine speed when the gear shift is determined to have started.
    Type: Grant
    Filed: June 4, 2015
    Date of Patent: May 15, 2018
    Assignee: Mazda Motor Corporation
    Inventors: Atsushi Yamasaki, Kyohei Ike, Yoshimitsu Fukuda, Toshiyuki Yamaguchi, Kenji Tanaka, Chikako Ohisa, Takeatsu Ito
  • Publication number: 20170254278
    Abstract: A PCM comprises a basic target torque-deciding part for deciding a basic target torque, based on a driving state of a vehicle including an accelerator pedal operation state, a torque reduction amount-deciding part for deciding a torque reduction amount, based on a driving state of the vehicle other than the accelerator pedal operation state, a final target torque-deciding part for deciding a final target torque, based on the decided basic target torque and the decided torque reduction amount, and an engine output control part for controlling an engine to cause the engine to output the decided final target torque, wherein the engine output control part is operable to prohibit switching of an operation mode of the engine from being performed simultaneously with control of the engine according to a change in the final target torque corresponding to a change in the torque reduction amount.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 7, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikako OHISA, Osamu SUNAHARA, Daisuke UMETSU, Takuo HIRANO, Kunihiro SHISHIMA, Takahiro KAWAMURA, Yasunori TAKAHARA, Daisaku OGAWA, Takeatsu ITO
  • Publication number: 20170254281
    Abstract: The engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle, a torque reduction amount-deciding part for deciding a torque reduction amount based on a steering wheel operation state, an TCM for deciding a torque-down demand amount, based on a driving state of the vehicle other than the steering wheel operation state, and a final target torque-deciding part for deciding a final target torque, based on the decided basic target torque, the decided torque reduction amount and the decided torque-down demand amount, wherein the final target torque-deciding part is operable, when there is a torque-down demand, to restrict a change in the final target torque corresponding to a change in the torque reduction amount.
    Type: Application
    Filed: March 1, 2017
    Publication date: September 7, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikako OHISA, Osamu SUNAHARA, Daisuke UMETSU, Takuo HIRANO, Kunihiro SHISHIMA, Takahiro KAWAMURA, Yasunori TAKAHARA, Daisaku OGAWA, Takeatsu ITO
  • Publication number: 20170234247
    Abstract: The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling an intake air amount so as to realize a target air amount required for an engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region, to restrict a reduction in the intake air amount corresponding to a change in the torque reduction amount.
    Type: Application
    Filed: February 10, 2017
    Publication date: August 17, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikako OHISA, Osamu SUNAHARA, Daisuke UMETSU, Taizo OHMAE, Yugou SUNAGARE, Yasunori TAKAHARA, Daisaku OGAWA, Takahiro KAWAMURA, Takeatsu ITO
  • Publication number: 20170234210
    Abstract: The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling the engine so as to cause the engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region where supercharging by a compressor, to restrict control of the engine corresponding to a change in the torque reduction amount.
    Type: Application
    Filed: February 10, 2017
    Publication date: August 17, 2017
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Chikako OHISA, Osamu SUNAHARA, Daisuke UMETSU, Taizo OHMAE, Yugou SUNAGARE, Yasunori TAKAHARA, Daisaku OGAWA, Takahiro KAWAMURA, Takeatsu ITO
  • Publication number: 20170145940
    Abstract: An engine control device for controlling an engine based on a vehicle operating state is provided, that includes a basic target torque determinator for setting a vehicle target acceleration based on an accelerator pedal operation and determining a basic target engine torque based on the vehicle target acceleration, a torque reduction demand determinator for determining whether an engine torque reduction is demanded based on the vehicle operating state other than the accelerator pedal operation, a torque reduction amount determinator for determining an engine torque reduction amount according to the operating state when the torque reduction is demanded, a final target torque determinator for determining as a final target torque an engine torque calculated by subtracting the torque reduction amount from the basic target torque when the torque reduction is demanded, and an engine controller for controlling the engine so as to output the final target torque.
    Type: Application
    Filed: October 28, 2016
    Publication date: May 25, 2017
    Inventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Takahiro Kawamura, Yasunori Takahara, Daisaku Ogawa, Takeatsu Ito
  • Publication number: 20170145931
    Abstract: An engine control device is provided, that includes an air amount controller, an ignition timing controller, a basic target torque determinator which determines a basic target torque, a change rate acquirer for acquiring a change rate of a steering operation, a target additional deceleration setter for increasing a target additional deceleration while an increase rate thereof becomes less as the change rate increases, a torque reduction amount determinator for determining an engine torque reduction amount, a final target torque determinator for determining a final target torque, and an actual air amount estimator for estimating an actual air amount introduced into a combustion chamber. The air amount controller determines a target air amount and controls the intake air amount to achieve the target air amount. The ignition timing controller retards the ignition timing more as the actual air amount becomes more excessive with respect to the target amount.
    Type: Application
    Filed: October 28, 2016
    Publication date: May 25, 2017
    Inventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Takahiro Kawamura, Yasunori Takahara, Daisaku Ogawa, Takeatsu Ito
  • Publication number: 20160033039
    Abstract: An engine control device to be mounted on a vehicle is provided. The control device includes a transmission state determining module for determining a connection between a stepped transmission and an engine, determining that a gear shift has started if the connection is disengaged from a connected state, and determining that the gear shift has finished if the connection is resumed, a gear position estimating module for estimating a gear position when the gear shift is determined to have started, a target engine speed specifying module for specifying a target engine speed based on the estimated gear position, and a speed control module for controlling an engine speed to the target engine speed when the gear shift is determined to have started.
    Type: Application
    Filed: June 4, 2015
    Publication date: February 4, 2016
    Inventors: Atsushi Yamasaki, Kyohei Ike, Yoshimitsu Fukuda, Toshiyuki Yamaguchi, Kenji Tanaka, Chikako Ohisa, Takeatsu Ito
  • Patent number: 8843272
    Abstract: There is provided a vehicle driving support device including: a change amount calculating part 10 that calculates a first correlation value correlated to a change amount of acceleration of a vehicle; a jerk calculating part 11 that calculates a second correlation value correlated to a jerk of the vehicle; and an operation state determining part 13 that determines a driving operation state of the vehicle from a first correlation value calculated by a change amount calculating part 10, and a second correlation value calculated by a jerk calculating part 11, in accordance with a determination reference previously set from a ratio of a kinetic energy of a mass point to the change amount of the acceleration of the vehicle at an end point of change when the acceleration of the vehicle is changed, calculated using a vibration model showing a movement of the mass point in a passenger compartment.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: September 23, 2014
    Assignee: Mazda Motor Corporation
    Inventors: Reiji Okita, Kenji Sasaki, Kensaku Oguri, Yosuke Ishii, Takeatsu Ito, Naoto Kawahara, Kazuya Ohsumi, Kenji Okada, Hidenobu Nakashima, Naoya Sugano, Manabu Shibakawa, Atsunori Tsukuda
  • Publication number: 20140018974
    Abstract: There is provided a vehicle driving support device including: a change amount calculating part 10 that calculates a first correlation value correlated to a change amount of acceleration of a vehicle; a jerk calculating part 11 that calculates a second correlation value correlated to a jerk of the vehicle; and an operation state determining part 13 that determines a driving operation state of the vehicle from a first correlation value calculated by a change amount calculating part 10, and a second correlation value calculated by a jerk calculating part 11, in accordance with a determination reference previously set from a ratio of a kinetic energy of a mass point to the change amount of the acceleration of the vehicle at an end point of change when the acceleration of the vehicle is changed, calculated using a vibration model showing a movement of the mass point in a passenger compartment.
    Type: Application
    Filed: September 18, 2013
    Publication date: January 16, 2014
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Reiji OKITA, Kenji SASAKI, Kensaku OGURI, Yosuke ISHII, Takeatsu ITO, Naoto KAWAHARA, Kazuya OHSUMI, Kenji OKADA, Hidenobu NAKASHIMA, Naoya SUGANO, Manabu SHIBAKAWA, Atsunori TSUKUDA