Patents by Inventor Hiromitsu Nagata

Hiromitsu Nagata 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: 20220393624
    Abstract: An abnormality monitoring apparatus includes a drive circuit unit, a current detection unit, a current cutoff unit, a first control unit, and a second control unit. The drive circuit unit switches an energization to the motor winding. The current detection unit detects a motor current, which is a current flowing through the motor winding. The current cutoff unit cuts off the motor current. The first control unit has an energization control unit for controlling energization to the motor winding and an energization state notification unit for outputting an energization state signal according to an energization command. The second control unit is provided separately from the first control unit and has an abnormality monitoring unit configured to monitor an abnormality based on a detection value of the current detection unit and an energization state signal so as to perform fail-safe measure according to a monitoring result.
    Type: Application
    Filed: August 18, 2022
    Publication date: December 8, 2022
    Inventor: Hiromitsu NAGATA
  • Patent number: 11396942
    Abstract: A shift range control device includes a signal receiver, an abnormality monitor, and a drive controller. The signal receiver acquires an encoder signal from an encoder capable of outputting three or more phase encoder signals having different phases. The abnormality monitor monitors an abnormality of the encoder. The drive controller controls drive of a motor by switching an energized phase of a motor winding so that a rotation position of the motor becomes a target rotation position according to a target shift range. When the abnormality of the encoder is detected, the driver controller drives the motor by faulty phase identification control to identify a faulty phase that is a phase in which an abnormality of the encoder signal occurs, and a normal phase in which the encoder signal is normal.
    Type: Grant
    Filed: April 8, 2021
    Date of Patent: July 26, 2022
    Assignees: DENSO CORPORATION, HONDA MOTOR CO., LTD.
    Inventors: Hiromitsu Nagata, Koji Sakaguchi, Jun Yamada, Masahiko Akiyama, Masashi Misawa, Kenshi Masuo
  • Publication number: 20210222773
    Abstract: A shift range control device includes a signal receiver, an abnormality monitor, and a drive controller. The signal receiver acquires an encoder signal from an encoder capable of outputting three or more phase encoder signals having different phases. The abnormality monitor monitors an abnormality of the encoder. The drive controller controls drive of a motor by switching an energized phase of a motor winding so that a rotation position of the motor becomes a target rotation position according to a target shift range. When the abnormality of the encoder is detected, the driver controller drives the motor by faulty phase identification control to identify a faulty phase that is a phase in which an abnormality of the encoder signal occurs, and a normal phase in which the encoder signal is normal.
    Type: Application
    Filed: April 8, 2021
    Publication date: July 22, 2021
    Inventors: Hiromitsu NAGATA, Koji SAKAGUCHI, Jun YAMADA, Masahiko AKIYAMA, Masashi MISAWA, Kenshi MASUO
  • Patent number: 10523138
    Abstract: A motor control device includes: a state monitoring unit that detects a power supply abnormality in which a power is not normally supplied to at least one of a rotation sensor and a motor; an abnormality determination unit that detects an abnormality of the rotation sensor based on an output signal of the rotation sensor; and a decision unit that decides whether to confirm the abnormality of the rotation sensor based on a detection result of the state monitoring unit and a detection result of the abnormality determination unit. When the state monitoring unit detects the power supply abnormality, the decision unit does not decide the abnormality of the rotation sensor even when the abnormality determination unit detects the abnormality of the rotation sensor.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: December 31, 2019
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Seiji Nakayama, Jun Yamada
  • Publication number: 20190103825
    Abstract: A motor control device includes: a state monitoring unit that detects a power supply abnormality in which a power is not normally supplied to at least one of a rotation sensor and a motor; an abnormality determination unit that detects an abnormality of the rotation sensor based on an output signal of the rotation sensor; and a decision unit that decides whether to confirm the abnormality of the rotation sensor based on a detection result of the state monitoring unit and a detection result of the abnormality determination unit. When the state monitoring unit detects the power supply abnormality, the decision unit does not decide the abnormality of the rotation sensor even when the abnormality determination unit detects the abnormality of the rotation sensor.
    Type: Application
    Filed: February 13, 2017
    Publication date: April 4, 2019
    Inventors: Hiromitsu NAGATA, Seiji NAKAYAMA, Jun YAMADA
  • Patent number: 10060527
    Abstract: During changing of a shift range (for example, from P-range to NotP-range), an SBW-ECU determines whether it is in a range-change delay condition (a switching completion time of the shift range is delayed than a normal switching completion time). When it is determined that it is in the range-change delay condition, it is determined whether a target range should be changed to a safer range (for example, P-range). As a result, when it is determined that the target range should be changed to the safer range, the target range is changed to the safer range. Thereby, even if a driver determines that the shift range cannot be changed before the switching completion of the shift range and the driver gets off the vehicle, the shift range can be changed to the safer range (P-range).
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: August 28, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Jun Yamada
  • Patent number: 9985568
    Abstract: An integrated IC provided in an SBW-ECU has plural functions such as a receiving function of receiving output signals of an encoder and a current supply function of supplying current to each phase of the motor. A microcomputer checks individually whether the signal receiving function and the current supply function are potentially abnormal and checks whether the integrated IC is abnormal based on the check results about the signal receiving function and the current supply function. For example, when it is determined that only the signal receiving function of the integrated IC is potentially abnormal, the encoder is determined to be abnormal. When it is determined that the signal receiving function and the current supply function of the integrated IC are both potentially abnormal, the integrated IC is determined to be abnormal.
    Type: Grant
    Filed: October 4, 2016
    Date of Patent: May 29, 2018
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Seiji Nakayama
  • Publication number: 20170335960
    Abstract: During changing of a shift range (for example, from P-range to NotP-range), an SBW-ECU determines whether it is in a range-change delay condition (a switching completion time of the shift range is delayed than a normal switching completion time). When it is determined that it is in the range-change delay condition, it is determined whether a target range should be changed to a safer range (for example, P-range). As a result, when it is determined that the target range should be changed to the safer range, the target range is changed to the safer range. Thereby, even if a driver determines that the shift range cannot be changed before the switching completion of the shift range and the driver gets off the vehicle, the shift range can be changed to the safer range (P-range).
    Type: Application
    Filed: February 16, 2016
    Publication date: November 23, 2017
    Inventors: Hiromitsu NAGATA, Jun YAMADA
  • Patent number: 9762122
    Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.
    Type: Grant
    Filed: September 19, 2014
    Date of Patent: September 12, 2017
    Assignee: DENSO CORPORATION
    Inventors: Yuuta Mizuno, Fumihiko Nakane, Fuminori Suzuki, Hiromitsu Nagata
  • Publication number: 20170104435
    Abstract: An integrated IC provided in an SBW-ECU has plural functions such as a receiving function of receiving output signals of an encoder and a current supply function of supplying current to each phase of the motor. A microcomputer checks individually whether the signal receiving function and the current supply function are potentially abnormal and checks whether the integrated IC is abnormal based on the check results about the signal receiving function and the current supply function. For example, when it is determined that only the signal receiving function of the integrated IC is potentially abnormal, the encoder is determined to be abnormal. When it is determined that the signal receiving function and the current supply function of the integrated IC are both potentially abnormal, the integrated IC is determined to be abnormal.
    Type: Application
    Filed: October 4, 2016
    Publication date: April 13, 2017
    Inventors: Hiromitsu NAGATA, Seiji NAKAYAMA
  • Patent number: 9169924
    Abstract: A control device for controlling an automatic transmission determines whether a fluid pressure of the operation fluid acting on a friction engagement element that is switched from a released-state to an engaged-state is in a fully-decreased state. If determined that the fluid pressure is not in a fully-decreased state, control of a manual valve is delayed. In such manner, the hydraulic circuit is switched by the manual valve after the full decrease of the fluid pressure of the operation fluid acting on the just-engaged friction engagement element. As a result, an abrupt rise of the fluid pressure is prevented and a shock in the automatic transmission is reduced.
    Type: Grant
    Filed: July 16, 2014
    Date of Patent: October 27, 2015
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Fuminori Suzuki
  • Patent number: 9166520
    Abstract: A range switching device may switch a shift range despite resetting and restarting of a controller. When the controller is reset and restarted during a switching operation of the shift range and the shift range before or after being switched is a P range, the controller controls a motor to rotate the motor until a range switching mechanism abuts against a first limit position of a movable range of the range switching mechanism and learns a rotation position of the motor as a reference position of the motor. When the shift ranges before and after being switched are the ranges other that the P range, the controller controls the motor to rotate until the range switching mechanism abuts against a second limit position of the movable range and learns the rotation position of the motor as the reference position.
    Type: Grant
    Filed: January 7, 2014
    Date of Patent: October 20, 2015
    Assignee: DENSO CORPORATION
    Inventors: Hiromitsu Nagata, Jun Yamada, Kazuhiro Yoshida
  • Patent number: 9124175
    Abstract: A load drive control device is provided, which includes a pulse generator for generating pulse signals with a duty ratio to drive an inductive load, a feedback setting section for setting the duty ratio for feedback, a detection setting section for setting the duty ratio for detection of a natural vibration frequency of the inductive load, a natural vibration frequency setting section for setting the natural vibration frequency of the inductive load based on an actual current value detected at setting the duty ratio for detection, and a selection section for selecting the feedback setting section as a duty ratio setting section at a normal time and for selecting the detection setting section as the duty ratio setting section when a condition for detecting the natural vibration frequency is satisfied.
    Type: Grant
    Filed: June 5, 2014
    Date of Patent: September 1, 2015
    Assignee: DENSO CORPORATION
    Inventors: Yuuta Mizuno, Fumihiko Nakane, Fuminori Suzuki, Hiromitsu Nagata
  • Publication number: 20150088320
    Abstract: A load drive controlling device includes a dulling controller, a dulling adjuster, and a Proportional Integral (PI) controller. The dulling adjuster sets a first electric current value for a dulling adjustment operation according to a change trend of a target electric current value in an inductive load. The dulling adjuster performs the dulling adjustment operation on the first electric current and limits a dulled value based on a guard value. The PI controller performs a PI control based on a deviation between the dulled value and an actual value of the electric current. The dulling controller sets the first electric current value and the guard value according to a change trend of the target electric current value. In such a configuration, the load drive controlling device improves an electric current response while preventing an over-accumulation of an integration value.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 26, 2015
    Inventors: Yuuta MIZUNO, Fumihiko NAKANE, Fuminori SUZUKI, Hiromitsu NAGATA
  • Publication number: 20150020632
    Abstract: A control device for controlling an automatic transmission determines whether a fluid pressure of the operation fluid acting on a friction engagement element that is switched from a released-state to an engaged-state is in a fully-decreased state. If determined that the fluid pressure is not in a fully-decreased state, control of a manual valve is delayed. In such manner, the hydraulic circuit is switched by the manual valve after the full decrease of the fluid pressure of the operation fluid acting on the just-engaged friction engagement element. As a result, an abrupt rise of the fluid pressure is prevented and a shock in the automatic transmission is reduced.
    Type: Application
    Filed: July 16, 2014
    Publication date: January 22, 2015
    Inventors: Hiromitsu NAGATA, Fuminori SUZUKI
  • Publication number: 20140375290
    Abstract: A load drive control device is provided, which includes a pulse generator for generating pulse signals with a duty ratio to drive an inductive load, a feedback setting section for setting the duty ratio for feedback, a detection setting section for setting the duty ratio for detection of a natural vibration frequency of the inductive load, a natural vibration frequency setting section for setting the natural vibration frequency of the inductive load based on an actual current value detected at setting the duty ratio for detection, and a selection section for selecting the feedback setting section as a duty ratio setting section at a normal time and for selecting the detection setting section as the duty ratio setting section when a condition for detecting the natural vibration frequency is satisfied.
    Type: Application
    Filed: June 5, 2014
    Publication date: December 25, 2014
    Inventors: Yuuta MIZUNO, Fumihiko NAKANE, Fuminori SUZUKI, Hiromitsu NAGATA
  • Publication number: 20140210395
    Abstract: A range switching device may switch a shift range despite resetting and restarting of a controller. When the controller is reset and restarted during a switching operation of the shift range and the shift range before or after being switched is a P range, the controller controls a motor to rotate the motor until a range switching mechanism abuts against a first limit position of a movable range of the range switching mechanism and learns a rotation position of the motor as a reference position of the motor. When the shift ranges before and after being switched are the ranges other that the P range, the controller controls the motor to rotate until the range switching mechanism abuts against a second limit position of the movable range and learns the rotation position of the motor as the reference position.
    Type: Application
    Filed: January 7, 2014
    Publication date: July 31, 2014
    Applicant: Denso Corporation
    Inventors: Hiromitsu NAGATA, Jun YAMADA, Kazuhiro YOSHIDA
  • Patent number: 4520971
    Abstract: A double bearing type fishing reel which is provided with a reel mounting leg at an upper portion of a reel body, which reel mounting leg has a fishing rod mounting member and an operating lever pivotably connected to its base portion in such a manner that an operating portion of the lever is positioned under a front portion of the fishing rod mounting member, which operating lever is adapted to be drawn upward by the forefinger of the hand gripping the fishing rod mounting member and fishing rod. This reel permits the clutch operation and spool braking operation to be carried out quickly and easily, controlling the spool braking force to an arbitrary level, and reliably preventing backlash of the fishing line.
    Type: Grant
    Filed: May 28, 1982
    Date of Patent: June 4, 1985
    Assignee: Daiwa Seiko Inc.
    Inventor: Hiromitsu Nagata