Patents by Inventor Mamoru Yoshioka

Mamoru Yoshioka 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: 20210277850
    Abstract: An EGR system is configured to allow a part of exhaust gas discharged from an engine to an intake passage to flow as EGR gas to an intake passage through an EGR passage to return to the engine. In the EGR system, a heating film is provided on an inner wall or an outer wall of at least one of the intake passage through which the EGR gas is allowed to flow and the EGR passage. At least a pair of a positive electrode and a negative electrode is provided to energize the heating film.
    Type: Application
    Filed: February 17, 2021
    Publication date: September 9, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Kaisho SO, Takashi BESSHO, Shinji KAWAI
  • Publication number: 20210207547
    Abstract: An intake valve system for an engine mounted on a vehicle and generating electric power used by the vehicle. The system includes a valve device having a valve body being moved by a stepping motor; and a controller configured to control a degree of opening of the valve device by supplying to the valve device a request indicating a specific number of steps in which the specific number of steps is a number of steps for driving the engine with a specific characteristic and the stepping motor is to operate according to the specific number of steps, and the controller is configured to control the degree of opening of the valve device by correcting a number of steps when an actual characteristic of the engine is different from the specific characteristic under a situation where the request indicating the specific number of steps is supplied to the valve device.
    Type: Application
    Filed: March 12, 2019
    Publication date: July 8, 2021
    Inventors: Akinari Yasue, Mamoru YOSHIOKA
  • Publication number: 20210199075
    Abstract: An EGR gas distributor for distributing EGR gas to branch pipes of an intake manifold includes a plurality of gas distribution passages arranged side by side for the branch pipes, a gas inflow passage and a gas chamber to deliver the EGR gas to each of the gas distribution passages. The gas inflow passage includes two, first and second, gas passage parts branched in a single stage. When the EGR gas distributor is mounted on the intake manifold, a passage cross-section of each gas passage part perpendicular to a central axis has an uppermost vertex and a lowermost vertex. The passage cross-sections of the gas passage parts are sized such that their lengths in a vertical direction are gradually longer from an upstream side of the first gas passage part to a downstream side of the second gas passage part.
    Type: Application
    Filed: December 3, 2020
    Publication date: July 1, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Kaisho SO
  • Patent number: 11041577
    Abstract: A double eccentric valve: a valve seat; a rotary shaft; a valve gear with a rotary shaft base end portion; a motor rotating the shaft via a valve gear; bearings supporting the shaft in a cantilever manner; a return spring giving, to the valve gear, spring force for rotating the shaft in a valve body closing direction; and a full-close stopper to restrict valve gear rotation with the shaft when the valve body is fully closed. When the motor is not driven, the valve gear partially contacts the full-close stopper by spring force, moment acting on the valve gear is caused to act on the rotary shaft with the contact point serving as a fulcrum, the rotary shaft is tilted toward the valve seat with the contact point between the rotary shaft and the bearing serving as a fulcrum, and thus, the valve body is pressed against the valve seat.
    Type: Grant
    Filed: July 19, 2018
    Date of Patent: June 22, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takashige Inagaki, Mamoru Yoshioka, Akihito Kuno, Makoto Fukui
  • Patent number: 11008983
    Abstract: An EGR gas distributor for distributing EGR gas to each of branch pipes of an intake manifold includes a gas chamber, a gas inflow passage, and a plurality of gas distribution passages. The inner wall of the gas chamber on a downstream side is divided into a plurality of downstream divided walls corresponding to the gas distribution passages. On the boundary between adjacent two of the downstream divided walls, a downstream ridge is provided in a perpendicular direction to the arrangement direction of the gas distribution passages. The downstream ridges are arranged side by side in number corresponding to the number of gas distribution passages. The downstream ridges each include a side surface in the arrangement direction. The downstream ridges are different in at least one of height and inclination angle of the side surface according to the positions of the downstream ridges.
    Type: Grant
    Filed: December 1, 2020
    Date of Patent: May 18, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Kaisho So, Eiji Nakamura
  • Patent number: 10982604
    Abstract: An engine system is provided with an electronic throttle device to regulate intake amount to the engine, an EGR device (EGR valve) to recirculate a part of exhaust gas of the engine to the engine as EGR gas, and an electronic control unit (ECU) to control the electronic throttle device and the EGR valve based on an operating state of the engine. The ECU performs feedback control of the electronic throttle device such that a detected engine rotation number becomes a target idle rotation number, and sets the target idle rotation number to a predetermined first set value for avoiding engine stall until a predetermined time elapses from start of deceleration and then shifts the target idle rotation number to a second set value lower than the first set value after the predetermined time elapses.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: April 20, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Masanao Kurita, Masateru Nagao
  • Patent number: 10982772
    Abstract: An eccentric valve has a drive mechanism, a drive force receiving part, a bearing for supporting a rotary shaft, and a return spring for generating a return spring force. During non-operation of the drive mechanism, the eccentric valve generates a separating-direction urging force to cause the rotary shaft to incline about the bearing serving as a fulcrum and urge the valve element in a direction away from the valve seat, the separating-direction urging force being a force caused by the return spring force. Either the valve element or the valve seat is provided with a sealing member to seal between the valve element and the valve seat during non-operation of the drive mechanism.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: April 20, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Kasumi Mishima, Naruto Ito, Makoto Fukui, Takashige Inagaki, Sunao Kitamura, Hiroshi Misumi
  • Patent number: 10975779
    Abstract: An engine system includes a throttle device, an EGR valve, and an ECU. The ECU diagnoses foreign-matter lodging abnormality of the EGR valve and the foreign-matter diameter based on intake pressure. When the existence of the abnormality and the foreign-matter diameter are determined, the ECU calculates a difference between a foreign-matter diameter and a predetermined learning determination value as a foreign-matter diameter difference. If this difference is larger than an abnormality determination value, the foreign-matter diameter is judged to be excessive and the throttle device is controlled to avoid engine stall. If the foreign-matter diameter difference is equal to or larger than a normality determination value and also equal to or less than the abnormality determination value, engine deceleration is continued. If the foreign-matter diameter difference is less than the normality determination value, the foreign-matter diameter is judged to be minute and the learning determination value is updated.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: April 13, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Masanao Kurita, Masateru Nagao
  • Patent number: 10927778
    Abstract: An engine system includes an injector, an EGR device (including an EGR valve having a step motor) to recirculate part of exhaust gas of an engine as EGR gas to the engine, and an electronic control unit (ECU) to control the injector, the EGR valve, and others based on an operating state of the engine. The ECU is configured to diagnose foreign-matter lodging abnormality of the EGR valve and a lodged foreign-matter diameter based on detected intake pressure during engine deceleration. When existence of the abnormality and the foreign-matter diameter are determined, the ECU controls the step motor to hold the EGR valve at a first opening degree smaller than a second opening degree needed to remove a foreign matter before fuel cut to the engine by the injector.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: February 23, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Masateru Nagao, Mamoru Yoshioka, Masanao Kurita
  • Patent number: 10914252
    Abstract: An EGR apparatus includes an EGR passage to allow part of exhaust gas discharged from an engine to an exhaust passage to flow as EGR gas into an intake passage; an EGR valve to regulate an EGR flow rate in the EGR passage; various sensors for detecting an engine running state; and an ECU to control the EGR valve based on the detected running state to diagnose abnormality in the EGR valve. The ECU calculates a reference intake pressure according the detected engine rotation speed and load by reference to a reference intake pressure map showing a relationship of the reference intake pressure to engine rotation speed, and engine load, and determine whether or not the EGR valve has abnormality in opening/closing by comparing the reference intake pressure with the detected intake pressure.
    Type: Grant
    Filed: October 3, 2018
    Date of Patent: February 9, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Mamoru Yoshioka
  • Publication number: 20210010446
    Abstract: An EGR gas distributor includes a gas chamber, a gas inflow passage to introduce EGR gas on its upstream side, gas outflow passages to discharge the EGR gas to branch pipes on their downstream side. An inner wall on a downstream side of the gas chamber is divided into downstream-side divided walls corresponding to the respective gas outflow passages, and the downstream-side divided walls are curved or slanted to be of protrusion-like shape protruding toward the corresponding gas outflow passages. Downstream-side dividing ridges are provided each between the adjacent downstream-side divided walls. An inner wall on the upstream side of the gas chamber is placed to face the downstream-side inner wall and provided with at least one upstream-side ridge protruding toward the downstream-side divided walls in each area corresponding to the downstream-side divided walls.
    Type: Application
    Filed: July 10, 2020
    Publication date: January 14, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Akinari YASUE, Kaisho SO
  • Patent number: 10862147
    Abstract: In a fuel cell system, each of an inlet sealing valve and an outlet integration valve is provided with a valve seat including a valve hole and a seat surface formed on a circumferential edge of the valve hole, a valve element formed, on its outer periphery, with a seal surface corresponding to the seat surface, and a motor to move the valve element away from the valve seat upon receipt of electric power supplied from outside. The valve seat is provided with a seal member to seal between the valve element and the valve seat during non-operation of the motor. In an inlet-side bypass passage connected to an air supply passage by detouring around the inlet sealing valve, there are arranged an inlet-side bypass passage and an inlet bypass valve.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: December 8, 2020
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Naruto Ito, Makoto Fukui
  • Publication number: 20200355135
    Abstract: This exhaust purification system includes: a pump disposed in an exhaust-side purge passage to supply air or purge gas purged from a canister to a catalyst; a three-way valve disposed upstream of the pump in the exhaust-side purge passage and configured to switch the exhaust-side purge passage between a communicating state allowing the pump to communicate with the canister and an atmosphere open state allowing the pump to communicate with the atmosphere; a flow control valve disposed downstream of the pump and configured to control a flow rate of air to be supplied to the catalyst; and a controller configured to, when a request to regenerate the catalyst occurs, control a purge valve, the pump, the three-way valve, and the flow control valve to supply, to the catalyst, purge gas purged from the canister and air by a necessary amount to burn particulates trapped in the catalyst.
    Type: Application
    Filed: January 29, 2019
    Publication date: November 12, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Mamoru YOSHIOKA
  • Publication number: 20200309154
    Abstract: A control unit for an air pump provided with a motor is provided to perform a energization switching control for unfreezing of switching energization and non-energization to a coil of the motor to unfreeze the air pump when the air pump is determined to be frozen, and to vary at least any one of an energization time and a non-energization time to the coil when the energization switching control for unfreezing is to be carried out.
    Type: Application
    Filed: March 16, 2020
    Publication date: October 1, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Mamoru YOSHIOKA
  • Publication number: 20200217262
    Abstract: This engine system is provided with: an engine; an injector; a super charger (including a compressor); an electronic throttle device provided in an air intake passage, the compressor being provided in the air intake passage upstream of the electronic throttle device; an evaporated fuel treatment apparatus (including a canister, a purge passage, and a purge valve), an outlet of the purge passage being connected to the air intake passage upstream of the compressor; and an electronic control unit (ECU). The ECU controls the purge valve in order to perform a purge cut of the vapor from the purge passage toward the air intake passage when determining that the engine has started to decelerate, and thereafter controls the injector in order to perform fuel cut to the engine.
    Type: Application
    Filed: July 3, 2018
    Publication date: July 9, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Mamoru YOSHIOKA
  • Publication number: 20200217430
    Abstract: A double eccentric valve: a valve seat; a rotary shaft; a valve gear with a rotary shaft base end portion; a motor rotating the shaft via a valve gear; bearings supporting the shaft in a cantilever manner; a return spring giving, to the valve gear, spring force for rotating the shaft in a valve body closing direction; and a full-close stopper to restrict valve gear rotation with the shaft when the valve body is fully closed. When the motor is not driven, the valve gear partially contacts the full-close stopper by spring force, moment acting on the valve gear is caused to act on the rotary shaft with the contact point serving as a fulcrum, the rotary shaft is tilted toward the valve seat with the contact point between the rotary shaft and the bearing serving as a fulcrum, and thus, the valve body is pressed against the valve seat.
    Type: Application
    Filed: July 19, 2018
    Publication date: July 9, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takashige INAGAKI, Mamoru YOSHIOKA, Akihito KUNO, Makoto FUKUI
  • Patent number: 10690094
    Abstract: An intake apparatus includes an intake manifold, an EGR gas distributor, and an EGR cooler. The intake manifold includes a surge tank and branch pipes. The EGR gas distributor includes a gas inlet, a gas chamber, and gas distribution pipes connected to the branch pipes. The branch pipes are each formed with a connecting hole for the gas distribution pipes. The EGR cooler is provided adjacent to the gas chamber to warm the inside wall of the gas chamber and includes a hot water passage and a gas passage. The gas chamber and the hot water passage are arranged to traverse the branch pipes. The gas distribution pipes are connected to the corresponding connecting holes. The EGR gas distributor and the EGR cooler in an integrated form are attached to the intake manifold.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: June 23, 2020
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Naruto Ito, Mamoru Yoshioka, Akinari Yasue, Hironori Suzuki, Kaisho So
  • Patent number: 10655572
    Abstract: A valve housing that has a flow passage. Arranged in the flow passage are a valve seat that includes a valve hole, valve body that can be seated on the valve seat, and a section of a rotary shaft with the valve body fixed to the tip thereof. A ring-shaped seat surface is formed in the valve hole of the valve seat. A ring-shaped sealing surface corresponding to the seat surface is formed on the perimeter of the disc-shaped valve body. By rotating the rotary shaft, the valve body rotates open from a closed state in which the valve body is seated on the valve seat and the sealing surface is in contact with the seat surface. A tapered upstream-side flow regulating part is provided in the valve hole of the valve seat, so as to widen from the seat surface toward the upstream side of the EGR gas flow.
    Type: Grant
    Filed: March 30, 2017
    Date of Patent: May 19, 2020
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takashige Inagaki, Mamoru Yoshioka, Naruto Ito
  • Publication number: 20200099069
    Abstract: In a fuel cell system, when fully closing an upstream-side valve, a controller performs controlled fully-closed opening-degree control that adjusts the opening degree of the upstream-side valve to a controlled fully-closing opening degree greater than zero by means of a drive mechanism. Upon determining that, during the controlled fully-closed opening-degree control, there is a leakage of oxidant gas in the upstream-side valve, the controller corrects the controlled fully-closed opening degree to the valve-closing side until reaching a zero-position opening degree at which the amount of leakage of the oxidant gas in the upstream-side valve becomes zero.
    Type: Application
    Filed: April 20, 2018
    Publication date: March 26, 2020
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Naruto ITO, Makoto FUKUI
  • Patent number: 10601058
    Abstract: In a fuel cell system, each of an inlet sealing valve and an outlet integration valve is provided with a valve seat including a valve hole and a seat surface formed on a circumferential edge of the valve hole, a valve element formed, on its outer periphery, with a seal surface corresponding to the seat surface, and a motor to move the valve element away from the valve seat upon receipt of electric power supplied from outside. The valve seat is provided with a seal member to seal between the valve element and the valve seat during non-operation of the motor. In an inlet-side bypass passage connected to an air supply passage by detouring around the inlet sealing valve, there are arranged an inlet-side bypass passage and an inlet bypass valve.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: March 24, 2020
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Naruto Ito, Makoto Fukui