Patents by Inventor Yuichiro Kitamura

Yuichiro Kitamura 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: 11948469
    Abstract: A flight information acquisition unit repeatedly acquires the respective flight status of a plurality of drones in flight. A flight irregularity determination unit determines whether or not the drones are flying in a manner deviated from a flight plan. When a flight status of a drone indicating flight deviated from the flight plan has been acquired, a first collision specification unit specifies the drone at risk of collision with a drone having that flight status. When a flight status indicating that there is a possibility of crash for a drone has been acquired, a flight status processing unit (such as a flight irregularity determination unit) sets a higher priority for processing based on the flight status acquired from that drone than for processing based on the flight status acquired from another drone.
    Type: Grant
    Filed: January 14, 2020
    Date of Patent: April 2, 2024
    Assignee: NTT DOCOMO, INC.
    Inventors: Takefumi Yamada, Yuichiro Segawa, Yasuhiro Kitamura
  • Patent number: 10352365
    Abstract: A power transmission shaft including a male spline formed in an outer periphery thereof, and a diameter increasing portion formed on a part of a tooth bottom of the male spline, which is located on an opposite side to an axial end of the power transmission shaft. The tooth bottom of the male spline has a substantially constant circumferential width extending up to an axial region of the diameter increasing portion. The diameter increasing portion includes a chamfered portion formed in the axial region of the diameter increasing portion, the chamfered portion connecting the tooth bottom and a tooth flank of the male spline to each other to reduce a tooth groove width.
    Type: Grant
    Filed: March 12, 2014
    Date of Patent: July 16, 2019
    Assignee: NTN CORPORATION
    Inventors: Tsuneaki Hiraoka, Yuichi Asano, Yuichiro Kitamura, Kiyohiro Suzuki
  • Publication number: 20160298693
    Abstract: A power transmission shaft including a male spline formed in an outer periphery thereof, and a diameter increasing portion formed on a part of a tooth bottom of the male spline, which is located on an opposite side to an axial end of the power transmission shaft. The tooth bottom of the male spline has a substantially constant circumferential width extending up to an axial region of the diameter increasing portion. The diameter increasing portion includes a chamfered portion formed in the axial region of the diameter increasing portion, the chamfered portion connecting the tooth bottom and a tooth flank of the male spline to each other to reduce a tooth groove width.
    Type: Application
    Filed: March 12, 2014
    Publication date: October 13, 2016
    Applicant: NTN CORPORATION
    Inventors: Tsuneaki HIRAOKA, Yuichi ASANO, Yuichiro KITAMURA, Kiyohiro SUZUKI
  • Patent number: 9199632
    Abstract: A control device for a hybrid vehicle includes a portion determining whether an engine torque is necessary, a portion controlling a motor to make a motor torque be a target torque, an engine rotation speed control portion controlling an engine output shaft to rotate at a target engine rotation speed for sudden start/reacceleration while the clutch being disengaged after starting the engine and before an actual rotation speed of the engine output shaft exceeds a reference target engine rotation speed in a case where the engine torque is necessary, a control portion engaging the clutch after the actual rotation speed exceeds the reference target engine rotation speed, and a portion controlling the engine so that the engine torque is assumed to be a target torque by canceling the control by the engine rotation speed control portion after the actual rotation speed exceeds the reference target engine rotation speed.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: December 1, 2015
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, MITSUBISHI JIDOSHA KOGYO KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki, Katsunori Ueda, Shigeyuki Yoshida, Shunichi Hirao
  • Patent number: 9108636
    Abstract: In a transmission control device for a hybrid vehicle, when an engine torque is equal to or less than a predetermined value during a constant speed traveling, a learning engine rotational speed is set to a rotational speed being higher by +? than the present engine rotational speed. Then, a learning engine torque is calculated that corresponds to the learning engine rotational speed, a learning clutch actuator operation amount is obtained that corresponds to the learning clutch torque, and a clutch actuator is operated based on the learning clutch actuator operation amount. Thereafter, when the engine rotational speed and the engine torque are in stable states, a clutch torque value corresponding to the learning clutch actuator operation amount is compensated by a stable engine torque value.
    Type: Grant
    Filed: March 21, 2012
    Date of Patent: August 18, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Patent number: 9108622
    Abstract: A drive control apparatus for a vehicle includes an engine, an electric motor, a clutch mechanism, an engine rotation sensor, a motor rotation sensor, an acceleration and deceleration intention detecting portion, and a controller. The controller controls a rotation speed of the engine to be an acceleration intention target value greater than a rotation speed of the motor and thereafter brings the clutch mechanism into the engagement state in a case where the acceleration and deceleration intention detecting portion detects that the vehicle is in an acceleration intention mode, and controls the rotation speed of the engine to be a deceleration intention target value smaller than the rotation speed of the motor and thereafter brings the clutch mechanism into the engagement state in a case where the acceleration and deceleration intention detecting portion detects that the vehicle is in a deceleration intention mode.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: August 18, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noriko Matsuo, Yuichiro Kitamura, Yuji Kinutani
  • Patent number: 9096214
    Abstract: The gear shifting control device comprises a speed change operation completion detecting portion, a rotation difference judging portion for judging whether or not the absolute difference between the engine rotation speed and the input rotation speed exceeds a predetermined value and a clutch torque—operating amount correcting portion which replaces the clutch torque corresponding to the clutch actuator operating amount corresponding to the target clutch torque with a presumed clutch torque. Thus the correction accuracy for the clutch actuator operating amount can be improved by learning a speed change state by extracting a suitable state for learning.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: August 4, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Patent number: 9096224
    Abstract: The clutch control device for a hybrid vehicle comprises an engine, an automated manual transmission, a clutch device and a clutch actuator concluding an output rod and a master cylinder which generates a hydraulic pressure therein by closing an idle port in response to the stroke of the output rod, a slave cylinder in fluid communication with the master cylinder through a passage and controlling the clutch device to be in engagement state or disengagement state operated by the hydraulic pressure generated by the master cylinder and a clutch engagement state holding control portion for temporarily holding the clutch device to be in the engagement state by operating the master cylinder to close the idle port after the engagement state under the vehicle being running under a motor drive mode continued for a predetermined time.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: August 4, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Patent number: 8874295
    Abstract: A control apparatus of a hybrid vehicle includes an automatic transmission, a clutch, a motor, a battery, a driving assist control device performing a driving assist control by driving the motor to generate an assist torque, a gear shift assist control device performing a gear shift assist control by driving the motor in response to a decrease of the engine torque caused by the disengagement state of the clutch, an SOC value detection device detecting an SOC value, and a first mode switch device switching an operation mode of the hybrid vehicle from a normal mode in which the driving assist control and the gear shift assist control are performed to a battery power preserving mode in which the driving assist control is prohibited and the gear shift assist control is permitted in a case where the SOC value is equal to or smaller than a first predetermined value.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 28, 2014
    Assignees: Aisin Seiki Kabushiki Kaisha, Aisin Ai Co., Ltd.
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki, Katsunori Ueda, Tuyoshi Murakami, Yoshiyuki Aoyama, Kazutaka Kobayashi, Takeshige Miyazaki
  • Publication number: 20130317683
    Abstract: In a transmission control device for a hybrid vehicle, when an engine torque is equal to or less than a predetermined value during a constant speed traveling, a learning engine rotational speed is set to a rotational speed being higher by +? than the present engine rotational speed. Then, a learning engine torque is calculated that corresponds to the learning engine rotational speed, a learning clutch actuator operation amount is obtained that corresponds to the learning clutch torque, and a clutch actuator is operated based on the learning clutch actuator operation amount. Thereafter, when the engine rotational speed and the engine torque are in stable states, a clutch torque value corresponding to the learning clutch actuator operation amount is compensated by a stable engine torque value.
    Type: Application
    Filed: March 21, 2012
    Publication date: November 28, 2013
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Publication number: 20130310217
    Abstract: The clutch control device for a hybrid vehicle comprises an engine, an automated manual transmission, a clutch device and a clutch actuator concluding an output rod and a master cylinder which generates a hydraulic pressure therein by closing an idle port in response to the stroke of the output rod, a slave cylinder in fluid communication with the master cylinder through a passage and controlling the clutch device to be in engagement state or disengagement state operated by the hydraulic pressure generated by the master cylinder and a clutch engagement state holding control portion for temporarily holding the clutch device to be in the engagement state by operating the master cylinder to close the idle port after the engagement state under the vehicle being running under a motor drive mode continued for a predetermined time.
    Type: Application
    Filed: March 9, 2012
    Publication date: November 21, 2013
    Applicant: Aisin Seiki Kabushiki Kaisha
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Publication number: 20130304337
    Abstract: The gear shifting control device comprises a speed change operation completion detecting portion, a rotation difference judging portion for judging whether or not the absolute difference between the engine rotation speed and the input rotation speed exceeds a predetermined value and a clutch torque—operating amount correcting portion which replaces the clutch torque corresponding to the clutch actuator operating amount corresponding to the target clutch torque with a presumed clutch torque. Thus the correction accuracy for the clutch actuator operating amount can be improved by learning a speed change state by extracting a suitable state for learning.
    Type: Application
    Filed: February 21, 2012
    Publication date: November 14, 2013
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki
  • Patent number: 8568270
    Abstract: A gear shift control device for controlling a hybrid vehicle drive system including an engine, an automated transmission, a clutch, and a motor generator, includes a torque indication device for indicating a driver request torque determined in accordance with an operation amount of an accelerator operated by a driver, a power generation interruption device changing a vehicle state to an engine driven state using all of the engine torque when a preliminary gear shift condition is satisfied in a state where the engine drives a driving wheel and the motor generator is actuated to generate an electric power, and a gear shift control device reducing the engine torque and generating an assist torque by actuating the motor generator, disconnecting the clutch, and returning the clutch to a connected state after changing gear sets of the gear train when a gear shift condition of the automated transmission is satisfied.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: October 29, 2013
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Tomomitsu Terakawa, Yasuhiro Hosoi, Yuichiro Kitamura, Yoshihide Suzuki, Katsunori Ueda, Shigeyuki Yoshida, Shunichi Hirao
  • Publication number: 20130029805
    Abstract: A drive control apparatus for a vehicle includes an engine, an electric motor, a clutch mechanism, an engine rotation sensor, a motor rotation sensor, an acceleration and deceleration intention detecting portion, and a controller. The controller controls a rotation speed of the engine to be an acceleration intention target value greater than a rotation speed of the motor and thereafter brings the clutch mechanism into the engagement state in a case where the acceleration and deceleration intention detecting portion detects that the vehicle is in an acceleration intention mode, and controls the rotation speed of the engine to be a deceleration intention target value smaller than the rotation speed of the motor and thereafter brings the clutch mechanism into the engagement state in a case where the acceleration and deceleration intention detecting portion detects that the vehicle is in a deceleration intention mode.
    Type: Application
    Filed: July 26, 2012
    Publication date: January 31, 2013
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noriko MATSUO, Yuichiro Kitamura, Yuji Kinutani
  • Patent number: 8160797
    Abstract: An HV_ECU executes a program including a step of calculating an estimated gradient, a step of performing rate limit processing on a change in the estimated gradient when on a hill and an absolute value of the vehicle speed is equal to or below V(0), a step of performing hysteresis processing, a step of calculating a creep increase coefficient, and a step of calculating a creep increase torque.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: April 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sumiko Amamiya, Koichiro Muta, Yuichiro Kitamura
  • Patent number: 7958868
    Abstract: A vehicle control device for a hybrid vehicle, which equipped with at least an internal combustion engine and a rotary electrical machine that reduces the shock that is imparted to a vehicle when the internal combustion engine starts. The vehicle control device detects the running state of the vehicle and, if it is determined that the internal combustion engine will be started, adjusts the ignition timing according to the running state of the vehicle. The control device also improves the responsiveness of the hybrid vehicle when increased acceleration is required.
    Type: Grant
    Filed: December 27, 2006
    Date of Patent: June 14, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Shinichi Sugai, Koichiro Muta, Yuichiro Kitamura
  • Publication number: 20100228461
    Abstract: A vehicle control device for a hybrid vehicle, which equipped with at least an internal combustion engine and a rotary electrical machine, that reduces the shock that is imparted to a vehicle when the internal combustion engine starts. The vehicle control device detects the running state of the vehicle and, if it is determined that the internal combustion engine will be started, adjusts the ignition timing according to the running state of the vehicle. The control device also improves the responsiveness of the hybrid vehicle when increased acceleration is required.
    Type: Application
    Filed: December 27, 2006
    Publication date: September 9, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Shinichi Sugai, Muta Okazaki-shi, Yuichiro Kitamura
  • Publication number: 20090240411
    Abstract: An HV_ECU executes a program including a step of calculating an estimated gradient, a step of performing rate limit processing on a change in the estimated gradient when on a hill and an absolute value of the vehicle speed is equal to or below V(0), a step of performing hysteresis processing, a step of calculating a creep increase coefficient, and a step of calculating a creep increase torque.
    Type: Application
    Filed: January 3, 2007
    Publication date: September 24, 2009
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Sumiko Amamiya, Koichiro Muta, Yuichiro Kitamura
  • Patent number: 7575078
    Abstract: The control procedure of the invention sets a target rotation speed Ne* and a target torque Te* of an engine corresponding to a torque demand Td* required for driving the vehicle (steps S100 to S120). In response to an upshift request for a gear of a transmission, the control procedure sets a positive pre-upshift target rotation speed Nmtag to a target rotation speed Nm1* of a first motor (step S230). The control procedure changes the target rotation speed Ne* of the engine to a specific rotation speed corresponding to the pre-upshift target rotation speed Nmtag of the first motor (step S240) and subsequently implements an actual change of the gear in the transmission (step S310). This arrangement effectively restrains a battery from being overcharged with excess electric power.
    Type: Grant
    Filed: October 9, 2007
    Date of Patent: August 18, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Koichiro Muta, Mitsuaki Higa, Yuichiro Kitamura
  • Patent number: D814366
    Type: Grant
    Filed: February 3, 2016
    Date of Patent: April 3, 2018
    Assignee: NTN CORPORATION
    Inventors: Tatsuro Sugiyama, Yuichiro Kitamura