Patents by Inventor Daisaku Ogawa

Daisaku Ogawa 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: 20180265119
    Abstract: A vehicle control device is provided, which includes a drive source configured to generate torque as driving force of a vehicle, a transmission torque control mechanism configured to control transmission torque to drive wheels according to the generated torque, and a processor configured to execute a vehicle attitude controlling module to perform a vehicle attitude control by controlling the transmission torque control mechanism to reduce the transmission torque so as to decelerate the vehicle when a starting condition that the vehicle is traveling and a steering angle related value increases is satisfied, and then, when a given terminating condition is satisfied, controlling the mechanism to resume the transmission torque back to the torque before being reduced. The transmission torque is controlled so as to cause a yaw rate that occurs in the vehicle while the vehicle attitude control is performed, to be lower than an upper limit yaw rate.
    Type: Application
    Filed: February 20, 2018
    Publication date: September 20, 2018
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Publication number: 20180265118
    Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, a processor configured to execute a vehicle attitude controlling module to control attitude of a vehicle by controlling the engine control mechanism to reduce the torque so as to decelerate the vehicle, when a condition that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases is satisfied, and a torque reduction amount setting module to set the reduction amount of the torque to be larger as a combustion frequency of the engine per unit time decreases. The vehicle attitude controlling module controls the engine control mechanism to reduce the torque based on the set reduction amount.
    Type: Application
    Filed: February 20, 2018
    Publication date: September 20, 2018
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Publication number: 20180266345
    Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, a steering device, and a processor. The processor determines whether a vehicle is traveling and a steering angle related value that is related to a steering angle of the steering device increases, executes a control of the engine control mechanism to reduce the torque when the vehicle is determined to be traveling and the steering angle related value is determined to increase, determines whether a combustion frequency of the engine per unit time is lower than a given value, executes the control for reducing the torque when the combustion frequency is determined to be higher than the given value, and prevents the execution of the control for reducing the torque when the combustion frequency is determined to be lower than the given value.
    Type: Application
    Filed: February 21, 2018
    Publication date: September 20, 2018
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Publication number: 20180266346
    Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, and a processor configured to execute a vehicle attitude controlling module to perform a vehicle attitude control in which the engine control mechanism is controlled to reduce the torque so as to decelerate the vehicle, when a condition that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases is satisfied, and a preventing module to prevent a combustion frequency of the engine per unit time from falling below a given value while the vehicle attitude controlling module executes the vehicle attitude control.
    Type: Application
    Filed: February 21, 2018
    Publication date: September 20, 2018
    Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
  • Patent number: 10024257
    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: Grant
    Filed: March 1, 2017
    Date of Patent: July 17, 2018
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Takuo Hirano, Kunihiro Shishima, Takahiro Kawamura, Yasunori Takahara, Daisaku Ogawa, Takeatsu Ito
  • Publication number: 20180086349
    Abstract: The vehicle control device is designed to control a vehicle equipped with an engine (10), and an automatic transmission (200) comprising a torque converter (202) with a lockup clutch (202f). The vehicle control device comprises a controller (50) configured to perform control of changing an engagement degree of the lockup clutch (202f) and to, when such a condition that the vehicle is traveling and a steering angle-related value as a parameter related to a steering angle of a steering apparatus of the vehicle increases is satisfied, reduce an output toque of the engine (10) to generate a deceleration of the vehicle to thereby execute a torque reduction control for controlling an attitude of the vehicle. The controller (50) is configured to reduce the output toque of the engine (10), in accordance with the engagement degree of the lockup clutch (202f) controlled by a lockup control.
    Type: Application
    Filed: September 22, 2017
    Publication date: March 29, 2018
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Keiichi HIWATASHI, Daisuke UMETSU, Osamu SUNAHARA, Yasunori TAKAHARA, Daisaku OGAWA, Takahiro KAWAMURA, Chikako OHISA
  • Publication number: 20180072317
    Abstract: A vehicle control device includes a drive source for generating torque as driving force that causes a vehicle to travel, a drive source control mechanism for controlling the torque generation by the drive source, a driving force transmission mechanism for transmitting the torque to vehicle wheels, an engageable element provided in the transmission mechanism, and a processor configured to execute an engagement state change control in which an engagement state of the engageable element is changed, a vehicle attitude controlling module for controlling attitude of the vehicle by driving the drive source control mechanism to reduce the torque so as to decelerate the vehicle, when a condition is satisfied, the condition being that the vehicle is traveling and a steering angle related value increases, and an engagement state change restricting module for restricting the execution of the engagement state change control while the vehicle attitude control is executed.
    Type: Application
    Filed: September 12, 2017
    Publication date: March 15, 2018
    Inventors: Keiichi Hiwatashi, Yasunori Takahara, Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Chikako Ohisa
  • Publication number: 20180066625
    Abstract: A vehicle control device is provided, which includes an engine including an ignition plug oriented inside a combustion chamber, a component provided in or near an exhaust passage of the engine, a processor configured to execute a vehicle attitude controlling module for controlling an attitude of a vehicle by retarding an ignition timing of the ignition plug to reduce an engine torque so as to decelerate the vehicle, when a condition is satisfied, the condition being that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases, and a torque reduction restricting module for restricting a reduction amount of the engine torque as at least one of an engine load and an engine speed increases during the vehicle attitude control.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 8, 2018
    Inventors: Keiichi Hiwatashi, Yasunori Takahara, Daisaku Ogawa, Daisuke Umetsu, Chikako Ohisa, Koichi Kimoto
  • 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: 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: 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: 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: 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