Patents by Inventor Isao Nakajima

Isao Nakajima 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: 20240308574
    Abstract: In a motor control device for a steer-by-wire steering device, the motor control device having a redundant system consisting of two systems, a first turning current command value is calculated in a first system, and a second turning current command value is calculated in a second system. A third processor outputs the first turning current command value when the two current command values are not divergent and outputs the second turning current command value when the two current command values are divergent. When a determination of a rapid steering operation is made, the third processor outputs the first turning current command value regardless of whether or not the two current command values are divergent.
    Type: Application
    Filed: March 12, 2024
    Publication date: September 19, 2024
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, JTEKT CORPORATION, DENSO CORPORATION
    Inventors: Kenji Shibata, Koichi Nishimura, Takahito Ishino, Ryo Yamazaki, Hiroyasu Inoue, Isao Namikawa, Nobuyori Nakajima, Hiroki Tomizawa, Takuya Maegawa
  • Patent number: 11898975
    Abstract: The electron spectrometer includes an excitation part 100 irradiating a sample with an energy beam, an orbiting part 10 causing electrons emitted from the sample irradiated with the energy beam to orbit, and a detection part 120 detecting the electrons released from the orbiting part 10, in which the orbiting part 10 includes a plurality of pairs of electrodes, the plurality of pairs of electrodes cause the electrons to orbit when an applied voltage is controlled, a part of the plurality of pairs of electrodes are pairs of electrodes to catch which catch the electrons into the orbiting part 10 when an applied voltage is controlled, and a part of the plurality of pairs of electrodes are pairs of electrodes to release which release the electrons from the orbiting part 10 when an applied voltage is controlled.
    Type: Grant
    Filed: February 23, 2022
    Date of Patent: February 13, 2024
    Assignee: TOHOKU UNIVERSITY
    Inventors: Masahiko Takahashi, Isao Nakajima, Yuuki Onitsuka
  • Publication number: 20220373485
    Abstract: The electron spectrometer includes an excitation part 100 irradiating a sample with an energy beam, an orbiting part 10 causing electrons emitted from the sample irradiated with the energy beam to orbit, and a detection part 120 detecting the electrons released from the orbiting part 10, in which the orbiting part 10 includes a plurality of pairs of electrodes, the plurality of pairs of electrodes cause the electrons to orbit when an applied voltage is controlled, a part of the plurality of pairs of electrodes are pairs of electrodes to catch which catch the electrons into the orbiting part 10 when an applied voltage is controlled, and a part of the plurality of pairs of electrodes are pairs of electrodes to release which release the electrons from the orbiting part 10 when an applied voltage is controlled.
    Type: Application
    Filed: February 23, 2022
    Publication date: November 24, 2022
    Inventors: Masahiko Takahashi, Isao Nakajima, Yuuki Onitsuka
  • Patent number: 10787983
    Abstract: A wastegate opens and closes the flow path of a bypass passage that bypasses the turbine of a forced-induction device. A processor changes the drive current for the electric actuator in a stepwise manner from a state where the wastegate is stationary in a given standstill position. The amount of change in the drive current that is made until the wastegate is determined to be moved is learned as a learning value. A requested drive current for moving the wastegate to a target opening degree is corrected based on the learning value.
    Type: Grant
    Filed: September 25, 2018
    Date of Patent: September 29, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanao Idogawa, Isao Nakajima, Masahiro Noguchi
  • Patent number: 10677180
    Abstract: A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.
    Type: Grant
    Filed: November 14, 2018
    Date of Patent: June 9, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuya Yoshikawa, Isao Nakajima, Akihiro Katayama, Ryo Suzuki, Sohichi Imai, Eiichiro Kido
  • Patent number: 10563602
    Abstract: A controller learns the degree of variation in the injection amount of fuel injection valves provided for respective cylinders when the fuel injection valves are operated to control the air-fuel ratios of the respective cylinders to be equal to each other. A first advancement requesting process causes the request for the ignition timing to be more advanced when the degree of variation is great than when the degree of variation is small. A second advancement requesting process causes the request for the ignition timing to be more advanced when the torque fluctuation amount of the internal combustion engine is than when the torque fluctuation amount is small. The ignition control process controls the ignition timing in accordance with the request of the more advanced one of the first advancement requesting process and the second advancement requesting process.
    Type: Grant
    Filed: October 4, 2018
    Date of Patent: February 18, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuya Yoshikawa, Isao Nakajima, Akihiro Katayama, Ryo Suzuki, Sohichi Imai, Eiichiro Kido
  • Publication number: 20190170072
    Abstract: A first limit requesting process limits a dither control process of fuel injection valves in such a manner that the absolute value of the difference between the air-fuel ratios of the cylinders becomes smaller when the degree of variation of the injection amounts of the fuel injection valves provided for respective cylinders is great than when the degree of variation is small. A second limit requesting process limits the dither control process in such a manner that the absolute value is smaller when the torque fluctuation amount of the internal combustion engine is great than when the torque fluctuation amount is small. The limiting process limits the dither control process in accordance with one of requests generated by the first limit requesting process and the second limit requesting process that causes the absolute value to be smaller than the other.
    Type: Application
    Filed: November 14, 2018
    Publication date: June 6, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuya YOSHIKAWA, Isao Nakajima, Akihiro Katayama, Ryo Suzuki, Sohichi Imai, Eiichiro Kido
  • Publication number: 20190162131
    Abstract: A wastegate opens and closes the flow path of a bypass passage that bypasses the turbine of a forced-induction device. A processor changes the drive current for the electric actuator in a stepwise manner from a state where the wastegate is stationary in a given standstill position. The amount of change in the drive current that is made until the wastegate is determined to be moved is learned as a learning value. A requested drive current for moving the wastegate to a target opening degree is corrected based on the learning value.
    Type: Application
    Filed: September 25, 2018
    Publication date: May 30, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masanao IDOGAWA, Isao NAKAJIMA, Masahiro NOGUCHI
  • Patent number: 10275938
    Abstract: An image processing apparatus including: a real space information input portion into which information about a real space is input; and a signal generating portion that generates a control signal for an image that creates a virtual shadow effect in the real space on the basis of the information about the real space.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: April 30, 2019
    Assignee: SONY CORPORATION
    Inventors: Masao Kondo, Hirotaka Tako, Yusuke Tsujita, Daisuke Shiono, Isao Nakajima, Kenichi Yamaura
  • Patent number: 10072593
    Abstract: A control device of an internal combustion engine according to the present invention executes air-fuel ratio control based on an output of an air-fuel ratio sensor provided at an upstream side of a catalyst, with correction based on an output of an oxygen sensor at a downstream side of the catalyst. When it is determined that a degree of an output tendency in a predetermined lean region is not less than a predetermined lean degree, and that a degree of an output tendency in a predetermined rich region is less than a predetermined rich degree based on lean tendency and rich tendency values representing output tendencies of the oxygen sensor, a limit is set to the correction in a direction to more suppress enriching of an air-fuel ratio as a degree is larger in which the output of the oxygen sensor is shifted to a lean side.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: September 11, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahide Okada, Masashi Hakariya, Yoshifumi Matsuda, Yoshihisa Oda, Hiroaki Tsuji, Tokiji Ito, Isao Nakajima, Toshihiro Kato, Yuya Yoshikawa
  • Patent number: 9932923
    Abstract: An internal combustion engine to which the apparatus is applied is a multi-cylinder internal combustion engine that includes a passage injection valve and a cylinder injection valve and that can use gasoline and alcohol as fuel. The apparatus performs abnormality determination for a determination object device, based on a detection signal of an oxygen sensor provided in an exhaust passage of the internal combustion engine. The concentration sensor detects alcohol concentration ALp of the fuel in a first fuel passage through which the fuel is fed to the passage injection valve, and alcohol concentration ALd of the fuel in a second fuel passage through which the fuel is fed to the cylinder injection valve. When a difference ?AL between the alcohol concentrations ALp, ALd is a determination value or greater (S13: YES), the execution of the abnormality determination is prohibited (S12).
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: April 3, 2018
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Isao Nakajima
  • Publication number: 20180040156
    Abstract: [Object] To provide an image processing apparatus, an image processing method, and a program. [Solution] An image processing apparatus including: a real space information input portion into which information about a real space is input; and a signal generating portion that generates a control signal for an image that creates a virtual shadow effect in the real space on the basis of the information about the real space.
    Type: Application
    Filed: January 19, 2016
    Publication date: February 8, 2018
    Inventors: MASAO KONDO, HIROTAKA TAKO, YUSUKE TSUJITA, DAISUKE SHIONO, ISAO NAKAJIMA, KENICHI YAMAURA
  • Patent number: 9752523
    Abstract: An air-fuel ratio control apparatus for an internal combustion engine is provided. A controller is programmed to perform correction amount guard control allowing adjustment of a correction amount by setting a limit on the correction amount when an appearance frequency of a state where an output value from a downstream sensor is leaner than a predetermined value is equal to or higher than a predetermined value. When a state where the output value from the downstream sensor is leaner than the predetermined value lasts for a duration equal to or longer than a predetermined time, an incorporation speed at which, during learning control, the correction amount for sub feedback control is incorporated into a learning value is set to a larger value that when the duration is shorter than the predetermined time, and performance of the correction amount guard control is suppressed until the learning control is completed.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: September 5, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuya Yoshikawa, Tokiji Ito, Isao Nakajima, Hiroaki Tsuji, Toshihiro Kato, Yoshihisa Oda, Masashi Hakariya, Masahide Okada, Yoshifumi Matsuda
  • Patent number: 9726103
    Abstract: A fuel injection amount control apparatus comprises an air-fuel ratio sensor disposed between an exhaust gas merging portion and an upstream catalyst. The control apparatus performs a feedback correction on an amount of fuel to be injected by the fuel injection valve so that an air-fuel ratio represented by the output value of the upstream air-fuel ratio sensor becomes equal to a target air-fuel ratio set at stoichiometric air-fuel ratio. The control apparatus obtains an air-fuel ratio imbalance indicating value, which becomes larger as a difference in air-fuel ratio of each of the mixtures supplied to each of the combustion chambers among the cylinders becomes larger, and performs an increasing correction to the instructed fuel injection amount in such a manner that an air-fuel ratio determined by the instructed fuel injection amount becomes richer than the stoichiometric air-fuel ratio as the obtained air-fuel ratio imbalance indicating value increases.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: August 8, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yasushi Iwazaki, Hiroshi Miyamoto, Tatsuro Shimada, Isao Nakajima, Yoshihisa Oda, Takuya Matsumoto, Masashi Hakariya
  • Publication number: 20160281625
    Abstract: An internal combustion engine to which the apparatus is applied is a multi-cylinder internal combustion engine that includes a passage injection valve and a cylinder injection valve and that can use gasoline and alcohol as fuel. The apparatus performs abnormality determination for a determination object device, based on a detection signal of an oxygen sensor provided in an exhaust passage of the internal combustion engine. The concentration sensor detects alcohol concentration ALp of the fuel in a first fuel passage through which the fuel is fed to the passage injection valve, and alcohol concentration ALd of the fuel in a second fuel passage through which the fuel is fed to the cylinder injection valve. When a difference ?AL between the alcohol concentrations ALp, ALd is a determination value or greater (S13: YES), the execution of the abnormality determination is prohibited (S12).
    Type: Application
    Filed: March 23, 2016
    Publication date: September 29, 2016
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventor: Isao NAKAJIMA
  • Patent number: 9341544
    Abstract: An abnormality detecting device of an internal combustion engine according to the present invention includes a sensor nick abnormality detecting unit configured to detect a nick abnormality in a detecting element of a downstream side sensor which is provided in a downstream side of an exhaust gas purifying catalyst in an exhaust passage and generates an output corresponding to an oxygen concentration in exhaust gas, on the basis of a matter that a distribution of an output of the downstream side sensor is biased to an area in which the air-fuel ratio is leaner than a theoretical air-fuel ratio, and an inhibiting unit configured to inhibit detection of the nick abnormality of the detecting element by the sensor nick abnormality detecting unit in the case that an intake air amount exceeds a predetermined amount.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: May 17, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Isao Nakajima, Yoshifumi Matsuda, Yoshihisa Oda, Masashi Hakariya, Masahide Okada, Hiroaki Tsuji, Tokiji Ito, Tatsuro Shimada, Toshihiro Kato, Yuya Yoshikawa
  • Publication number: 20160076474
    Abstract: An air-fuel ratio control apparatus for an internal combustion engine is provided. A controller is programmed to perform correction amount guard control allowing adjustment of a correction amount by setting a limit on the correction amount when an appearance frequency of a state where an output value from a downstream sensor is leaner than a predetermined value is equal to or higher than a predetermined value. When a state where the output value from the downstream sensor is leaner than the predetermined value lasts for a duration equal to or longer than a predetermined time, an incorporation speed at which, during learning control, the correction amount for sub feedback control is incorporated into a learning value is set to a larger value that when the duration is shorter than the predetermined time, and performance of the correction amount guard control is suppressed until the learning control is completed.
    Type: Application
    Filed: March 28, 2014
    Publication date: March 17, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yuya YOSHIKAWA, Tokiji ITO, Isao NAKAJIMA, Hiroaki TSUJI, Toshihiro KATO, Yoshihisa ODA, Masashi HAKARIYA, Masahide OKADA, Yoshifumi MATSUDA
  • Publication number: 20160003181
    Abstract: A control device of an internal combustion engine according to the present invention executes air-fuel ratio control based on an output of an air-fuel ratio sensor provided at an upstream side of a catalyst, with correction based on an output of an oxygen sensor at a downstream side of the catalyst. When it is determined that a degree of an output tendency in a predetermined lean region is not less than a predetermined lean degree, and that a degree of an output tendency in a predetermined rich region is less than a predetermined rich degree based on lean tendency and rich tendency values representing output tendencies of the oxygen sensor, a limit is set to the correction in a direction to more suppress enriching of an air-fuel ratio as a degree is larger in which the output of the oxygen sensor is shifted to a lean side.
    Type: Application
    Filed: January 21, 2014
    Publication date: January 7, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masahide OKADA, Masashi HAKARIYA, Yoshifumi MATSUDA, Yoshihisa ODA, Hiroaki TSUJI, Tokiji ITO, Isao NAKAJIMA, Toshihiro KATO, Yuya YOSHIKAWA
  • Patent number: 9206754
    Abstract: A control device of an internal combustion engine according to the present invention has units configured to inject fuel at a first predetermined ratio from first and second fuel injection valves which are provided in each of cylinders to calculate a first value indicating a degree of variation in air-fuel ratios between the cylinders based on a output of the engine, and inject fuel at a second predetermined ratio therefrom to calculate a second value in the same manner. Furthermore, the control device has a unit configured to select one mode from modes relating to abnormality in the first fuel injection valve or the second fuel injection valve on the basis of the first and second values, and calculate a value indicating the degree of the variation in the air-fuel ratios between the cylinders, thereby calculating a fuel amount of the basis of them.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: December 8, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Toshihiro Kato, Yoshifumi Matsuda, Yoshihisa Oda, Masashi Hakariya, Masahide Okada, Isao Nakajima, Hiroaki Tsuji, Tokiji Ito, Yuya Yoshikawa
  • Patent number: 9097193
    Abstract: An inter-cylinder air-fuel ratio variation abnormality detection apparatus is disclosed. The apparatus determines imbalance of an air-fuel ratio among the cylinders based on a difference between index values correlated with crank angular velocities detected in a set of opposite cylinders belonging to different banks and having crank angles different from one another by 360°; and carries out an air-fuel ratio feedback process for controlling an amount of injected fuel for each of the banks, wherein the apparatus comprises a correction unit correcting, before determining the air-fuel ratio imbalance, the difference between the index values in a direction of combustion improvement for opposite cylinders that are opposite to cylinders belonging to a bank identical to a bank of a cylinder with the most deviating index value from a standard value among all the cylinders and being other than the cylinder with the most deviating index value.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: August 4, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshihisa Oda, Isao Nakajima, Masashi Hakariya, Akihiro Katayama, Kazuhiro Akisada, Sei Maruta, Leuth Insixiengmai, Shinichi Nakagoshi, Masahide Okada