Patents by Inventor Koji Nunami

Koji Nunami 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: 11333136
    Abstract: A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle ?, ?=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M?1) is N.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: May 17, 2022
    Assignee: AISIN CORPORATION
    Inventors: Hisashi Ono, Katsuhiko Takasu, Koji Nunami
  • Patent number: 11293418
    Abstract: A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle ?, ?=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M?1) is N.
    Type: Grant
    Filed: November 21, 2018
    Date of Patent: April 5, 2022
    Assignee: AISIN CORPORATION
    Inventors: Hisashi Ono, Katsuhiko Takasu, Koji Nunami
  • Patent number: 11199124
    Abstract: A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: December 14, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Naoto Hisaminato, Hirokazu Ando, Masaaki Yamaguchi, Hirotaka Watanabe, Masahiro Yoshida, Koji Nunami, Naoto Yumisashi, Masafumi Yoshida, Takahiko Aoyagi
  • Patent number: 11143327
    Abstract: A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.
    Type: Grant
    Filed: October 22, 2019
    Date of Patent: October 12, 2021
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Naoto Hisaminato, Hirokazu Ando, Masaaki Yamaguchi, Hirotaka Watanabe, Takahiko Aoyagi, Masahiro Yoshida, Koji Nunami, Naoto Yumisashi, Masafumi Yoshida
  • Patent number: 10927748
    Abstract: A flow passage device includes a circulation flow passage, a swing valve provided in the circulation flow passage, an energizing part, and a lock mechanism including a lock pin. The lock pin is configured so as to hinder the swing valve from opening, and to allow the swing valve to open. The swing valve is configured so as to rotate from a first valve position to a second valve position. The lock mechanism is configured so as to set a locked state and to set an unlocked state. The lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on a downstream side of the swing valve.
    Type: Grant
    Filed: November 15, 2019
    Date of Patent: February 23, 2021
    Assignees: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masafumi Yoshida, Naoto Yumisashi, Koji Nunami, Masahiro Yoshida, Hirotaka Watanabe, Takahiko Aoyagi, Noboru Takagi, Hirokazu Kato, Rihito Kaneko, Masaaki Yamaguchi
  • Publication number: 20200158254
    Abstract: A cooling apparatus includes a circulation circuit, a pump, a flow rate adjustment valve, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a stopper that moves between a restriction position and a retraction position. The controller is configured to execute, when maintaining the open degree of the flow rate adjustment, a preparatory process of moving the stopper to the restriction position after arranging the stopper at the retraction position and arranging the valve member further in the valve-closing direction than the stopper through control of the pump discharge amount.
    Type: Application
    Filed: October 22, 2019
    Publication date: May 21, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noboru TAKAGI, Hirokazu KATO, Rihito KANEKO, Naoto HISAMINATO, Hirokazu ANDO, Masaaki YAMAGUCHI, Hirotaka WATANABE, Takahiko AOYAGI, Masahiro YOSHIDA, Koji NUNAMI, Naoto YUMISASHI, Masafumi YOSHIDA
  • Publication number: 20200158000
    Abstract: A flow passage device includes a circulation flow passage, a swing valve provided in the circulation flow passage, an energizing part, and a lock mechanism including a lock pin. The lock pin is configured so as to hinder the swing valve from opening, and to allow the swing valve to open. The swing valve is configured so as to rotate from a first valve position to a second valve position. The lock mechanism is configured so as to set a locked state and to set an unlocked state. The lock pin is configured so as to protrude as being energized by pressure of the fluid on an upstream side of the swing valve, and to retract as being energized by pressure of the fluid on a downstream side of the swing valve.
    Type: Application
    Filed: November 15, 2019
    Publication date: May 21, 2020
    Applicants: AISIN SEIKI KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masafumi YOSHIDA, Naoto YUMISASHI, Koji NUNAMI, Masahiro YOSHIDA, Hirotaka WATANABE, Takahiko AOYAGI, Noboru TAKAGI, Hirokazu KATO, Rihito KANEKO, Masaaki YAMAGUCHI
  • Publication number: 20200157999
    Abstract: A cooling apparatus for an internal combustion engine includes a pump, a radiator, a flow rate adjustment valve, a bypass passage, and a controller. The flow rate adjustment valve includes a valve member that rotates to change an open degree of the flow rate adjustment valve and a valve member biasing component that biases the valve member in a valve-closing direction in which the open degree decreases. The valve member rotates in a valve-opening direction in which the open degree increases when a pressure difference increases between positions upstream and downstream of the valve member in a flow direction of coolant in the circulation circuit and rotate in the valve-closing direction when the pressure difference decreases. The controller increases the pump discharge amount as a target radiator flow rate that is a target of an amount of coolant passing through the radiator increases.
    Type: Application
    Filed: October 22, 2019
    Publication date: May 21, 2020
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Noboru TAKAGI, Hirokazu KATO, Rihito KANEKO, Naoto HISAMINATO, Hirokazu ANDO, Masaaki YAMAGUCHI, Hirotaka WATANABE, Masahiro YOSHIDA, Koji NUNAMI, Naoto YUMISASHI, Masafumi YOSHIDA, Takahiko AOYAGI
  • Publication number: 20190154016
    Abstract: A fluid pump includes: three or more volume chambers that suction and discharge a fluid sequentially; moving elements that are respectively provided in the volume chambers, move relative to the volume chamber, and suction and discharge the fluid from and to the volume chamber; a cam that abuts against and drives the moving elements; and a driving section that drives at least one of the moving elements and the cam and relatively rotates the moving elements and the cam to discharge the fluid one time from each of the volume chambers in one cycle of the relative rotation, in which, when suctioning and discharging the fluid, regarding a discharge rotation angle ?, ?=(Z/M)×N is satisfied, where the number of volume chambers is M and any integer from 2 to (M?1) is N.
    Type: Application
    Filed: November 21, 2018
    Publication date: May 23, 2019
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hisashi Ono, Katsuhiko Takasu, Koji Nunami
  • Patent number: 10006320
    Abstract: A system for controlling valve opening/closing timing that allows an unlocking operation to be reliably performed is configured. When extracting a lock member from a recess, a second control valve is set to an unlock position, a first control valve is set to a predetermined position, and a relative rotation phase is displaced. As a result, the relative rotation phase is displaced in a direction opposite to the direction of displacement by cam average torque from a camshaft. Afterward, by setting the first control valve to a neutral position, the relative rotation phase is displaced by the cam average torque, and when this displacement occurs, a state in which the lock member is separated from an inner wall of the recess is created, thus facilitating extraction of the lock member from the recess.
    Type: Grant
    Filed: March 5, 2015
    Date of Patent: June 26, 2018
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hiroyuki Amano, Koji Nunami, Takashi Iwaya
  • Patent number: 9726053
    Abstract: A valve opening/closing timing control device includes: an intermediate lock mechanism switchable between a locked state constraining a relative rotation phase to an intermediate locked phase, and an unlocked state releasing the constraint; a phase control unit controlling fluid supply to a retard chamber and fluid discharge from an advance chamber, or controlling fluid discharge from the retard chamber and fluid supply to the advance chamber, such that the lock member attains the intermediate locked phase; and a determination unit determining whether the lock member will attain the determination phase, when control has been performed to move the lock member toward a determination phase that has been set at a different position than the intermediate locked phase, after execution of control to either supply fluid to the retard chamber and discharge fluid from the advance chamber, or discharge fluid from the retard chamber and supply fluid to the advance chamber.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: August 8, 2017
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koji Nunami, Takashi Iwaya, Hiroyuki Amano, Masaki Kobayashi
  • Publication number: 20170016359
    Abstract: A system for controlling valve opening/closing timing that allows an unlocking operation to be reliably performed is configured. When extracting a lock member from a recess, a second control valve is set to an unlock position, a first control valve is set to a predetermined position, and a relative rotation phase is displaced. As a result, the relative rotation phase is displaced in a direction opposite to the direction of displacement by cam average torque from a camshaft. Afterward, by setting the first control valve to a neutral position, the relative rotation phase is displaced by the cam average torque, and when this displacement occurs, a state in which the lock member is separated from an inner wall of the recess is created, thus facilitating extraction of the lock member from the recess.
    Type: Application
    Filed: March 5, 2015
    Publication date: January 19, 2017
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hiroyuki AMANO, Koji NUNAMI, Takashi IWAYA
  • Publication number: 20160169061
    Abstract: A valve opening and closing timing control device includes a vane selectively moving a relative rotational phase of a driven-side rotary member relative to a driving-side rotary member between a retarded direction and an advance direction, an intermediate lock mechanism being switchable between a lock state and an unlock state, and a phase control portion performing a control of a supply of a fluid to a retard chamber and a discharge of the fluid from an advance chamber, or a control of a discharge of the fluid from the retard chamber and a supply of the fluid to the advance chamber, in order for a lock member to reach an intermediate locked phase by reducing a travelling speed of the relative rotational phase from a reference phase to the intermediate locked phase to be slower than the travelling speed of the relative rotational phase to the reference phase.
    Type: Application
    Filed: June 25, 2014
    Publication date: June 16, 2016
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Takashi IWAYA, Koji NUNAMI, Hiroyuki AMANO
  • Patent number: 9243525
    Abstract: A valve control mechanism is configured that is capable of optimally controlling an engine by lifting an intake valve only by the necessary amount, while suppressing noise at the time of operation. This valve control mechanism includes a control member that rotates around a control axis due to a driving force of an actuator, and a base end portion of a rocker arm is pivotably supported around a pivot axis by an eccentric support portion of the control member. The rocker arm is pivoted by a cam portion of a camshaft abutting against an intermediate roller of the rocker arm, and an operation of opening the intake valve is performed due to a pressure force from the pivot end. The rocker arm is shifted in the longitudinal direction due to an operation of the actuator, and control for changing the lift amount of the intake valve is performed.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: January 26, 2016
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koji Nunami, Hisashi Ono, Yuki Nishida
  • Publication number: 20160017767
    Abstract: A valve opening/closing timing control device includes: an intermediate lock mechanism switchable between a locked state constraining a relative rotation phase to an intermediate locked phase, and an unlocked state releasing the constraint; a phase control unit controlling fluid supply to a retard chamber and fluid discharge from an advance chamber, or controlling fluid discharge from the retard chamber and fluid supply to the advance chamber, such that the lock member attains the intermediate locked phase; and a determination unit determining whether the lock member will attain the determination phase, when control has been performed to move the lock member toward a determination phase that has been set at a different position than the intermediate locked phase, after execution of control to either supply fluid to the retard chamber and discharge fluid from the advance chamber, or discharge fluid from the retard chamber and supply fluid to the advance chamber.
    Type: Application
    Filed: June 25, 2014
    Publication date: January 21, 2016
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koji NUNAMI, Takashi IWAYA, Hiroyuki AMANO, Masaki KOBAYASHI
  • Patent number: 9157338
    Abstract: A lash adjuster is configured that reduces the impact at the time when a pressure force is exerted on a pressure-receiving effector, and reliably opens a valve by the necessary amount. This lash adjuster includes, in a relatively movable manner, the pressure-receiving effector that receives the pressure force and a relay effector that performs an operation of opening an intake valve, a pressure receiving-side damper space is formed at an insertion portion thereof, and an orifice portion is formed that suppresses an outflow of oil in the pressure receiving-side damper space when the pressure-receiving effector and the relay effector move in approaching directions. An abutting portion is formed that directly transmits the pressure force of the pressure-receiving effector to the relay effector when the pressure-receiving effector and the relay effector approach each other.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: October 13, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koji Nunami, Hisashi Ono, Yuki Nishida
  • Patent number: 9127671
    Abstract: An oil pump includes: an inner rotor rotatable with a drive shaft in a unified manner on a drive-rotation axis; an outer rotor which has inner teeth configured to engage with outer teeth of the inner rotor and is rotatable about a driven axis eccentric to the drive-rotation axis; and an adjustment ring for rotatably supporting the outer rotor. A guide means which allows the adjustment ring to rotate about the driven axis, while allowing the driven axis to revolve about the drive-rotation axis, is formed of: first and second arm portions provided on the adjustment ring; and first and second guide faces with which the first and second arm portions are brought into slidable contact.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: September 8, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Hisashi Ono, Masaharu Hamasaki, Yuki Nishida, Koji Nunami, Shinji Kazaoka
  • Patent number: 9074517
    Abstract: An object is to provide a vehicle coolant control valve having excellent response, small size and weight, and low power consumption. A coolant stop valve (vehicle coolant control valve) valve comprises a valve body for controlling the flow of a fluid, the valve body having a magnetic body; a coil spring (urging device) for moving the valve body in the closing direction; a valve seat capable of coming in contact with the valve body; and a solenoid for moving the valve body in the closing direction; wherein the valve body is moved in the opening direction by fluid pressure of a fluid discharged from a water pump (pump) during operation of the water pump (pump), against the movement force of the coil spring (urging device) in the closing direction.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: July 7, 2015
    Assignee: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Masanobu Matsusaka, Tadayoshi Sato, Kentaroh Mochizuki, Koji Nunami
  • Publication number: 20150013627
    Abstract: A valve control mechanism is configured that is capable of optimally controlling an engine by lifting an intake valve only by the necessary amount, while suppressing noise at the time of operation. This valve control mechanism includes a control member that rotates around a control axis due to a driving force of an actuator, and a base end portion of a rocker arm is pivotably supported around a pivot axis by an eccentric support portion of the control member. The rocker arm is pivoted by a cam portion of a camshaft abutting against an intermediate roller of the rocker arm, and an operation of opening the intake valve is performed due to a pressure force from the pivot end. The rocker arm is shifted in the longitudinal direction due to an operation of the actuator, and control for changing the lift amount of the intake valve is performed.
    Type: Application
    Filed: January 31, 2013
    Publication date: January 15, 2015
    Applicant: AISIN SEIKI KABUSHIKI KAISHA
    Inventors: Koji Nunami, Hisashi Ono, Yuki Nishida
  • Publication number: 20140366827
    Abstract: A lash adjuster is configured that reduces the impact at the time when a pressure force is exerted on a pressure-receiving effector, and reliably opens a valve by the necessary amount. This lash adjuster includes, in a relatively movable manner, the pressure-receiving effector that receives the pressure force and a relay effector that performs an operation of opening an intake valve, a pressure receiving-side damper space is formed at an insertion portion thereof, and an orifice portion is formed that suppresses an outflow of oil in the pressure receiving-side damper space when the pressure-receiving effector and the relay effector move in approaching directions. An abutting portion is formed that directly transmits the pressure force of the pressure-receiving effector to the relay effector when the pressure-receiving effector and the relay effector approach each other.
    Type: Application
    Filed: January 31, 2013
    Publication date: December 18, 2014
    Inventors: Koji Nunami, Hisashi Ono, Yuki Nishida