Patents Assigned to Aisan Kogyo Kabushiki Kaisha
  • Publication number: 20220010810
    Abstract: A centrifugal pump includes a pump body that defines a partition between a rotor chamber and a pump chamber, a motor case that forms the rotor chamber together with the pump body, a pump cover that forms the pump chamber together with the pump body, and a bearing that rotatably supports a rotor shaft of a rotor with respect to the pump body. The pump body includes a boss part that projects from a partition wall toward the rotor chamber and rotatably supports the bearing. A projection part projects from a lateral section of the boss part. The projection part has an inclined surface section inclined radially inward toward the leading end side of the boss part. The boss part has a connection hole that extends from the rotor chamber to the pump chamber. A rotor chamber side opening end portion of the connection hole opens to the inclined surface section.
    Type: Application
    Filed: December 16, 2019
    Publication date: January 13, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Nobuhiro KATO
  • Publication number: 20220001318
    Abstract: A dust filter is configured to filter air drawn into a vehicle canister. The dust filter includes a filtration member and a case. The case has an inner chamber for accommodating the filtration member. The case has a drainage port for draining liquid that has infiltrated the inner chamber. The drainage port is at least one opening formed at the bottom of the inner chamber. The case includes a cover that covers the drainage port. The cover has an outlet that opens to the outside. The outlet is lower than the drainage port. At least one baffle plate is disposed inside the cover. The baffle plate has a slope on the side of the baffle plate facing the drainage port, thereby forming a ramp.
    Type: Application
    Filed: June 21, 2021
    Publication date: January 6, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takumi TSUCHIYA, Norihiro KONDO, Tsuneyuki KURATA
  • Publication number: 20220003192
    Abstract: A canister includes a case having a body, a fluid channel in the body having an adsorbent containing adsorption chamber, a cover plate closing an opening in the body, a push plate between the cover plate and the adsorbent, a biasing member between the push plate and the cover plate, and a filter. The case includes a filter supporting portion facing an outer peripheral edge of the filter that includes fused portions and non-fused portions to which the outer peripheral edge of the filter is fusion-bonded and not fusion-bonded, respectively. The fused portions and non-fused portions are arranged in an alternating manner about the filter supporting portion. The filter includes first portions and second portions pressed against the fused portions and non-fused portions, respectively, by the biasing member via the adsorbent. The first portions and the second portions are alternately arranged about the filter supporting portion.
    Type: Application
    Filed: September 16, 2021
    Publication date: January 6, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Taisuke KAGAU, Makoto IIMI, Hiroshi SAKAGUCHI
  • Publication number: 20220001319
    Abstract: A dust filter is configured to filter air drawn into a vehicle canister. The dust filter includes a first portion including a first engaging portion and a second portion including a second engaging portion. The second portion is attached to the first portion by engagement of the second engaging portion with the first engaging portion. The first portion includes a filtration member and a case. The case includes an inner chamber within which the filtration member is disposed. The case includes a drainage port configured to drain liquid that has infiltrated the inner chamber. The second portion is attached to the first portion to form a cover that covers the drainage port together with the first portion. The cover has an outlet that opens to the outside at a position lower than the drainage port.
    Type: Application
    Filed: June 21, 2021
    Publication date: January 6, 2022
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takumi TSUCHIYA, Norihiro KONDO, Tsuneyuki KURATA
  • Patent number: 11203992
    Abstract: A vaporized-fuel treating apparatus includes a pump part for controlling a flow of purge gas and a heating part for controlling driving of the pump part and for generating heat. At least a part of the heating part is placed to be exposed in an atmosphere passage. The pump part is either placed in the purge passage or arranged connecting to the purge passage.
    Type: Grant
    Filed: June 17, 2019
    Date of Patent: December 21, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Masanobu Shinagawa, Yoshihiko Honda, Shota Tsukamoto
  • Publication number: 20210391587
    Abstract: A control device of a fuel cell system does not execute feedback control of an air valve in a case where a first condition in which a valve opening degree command value calculated by the control device is less than a command value threshold and a second condition in which a valve opening degree measurement value measured by an air valve opening degree sensor is less than a measurement value threshold are satisfied, and executes the feedback control of the air valve in a case where the first condition or the second condition is not satisfied.
    Type: Application
    Filed: June 2, 2021
    Publication date: December 16, 2021
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Kazuo YAMAMOTO, Jiro OIKAWA
  • Publication number: 20210381453
    Abstract: An evaporated fuel treatment apparatus is provided with a purge pump and a purge valve and an electronic control unit (ECU) for controlling the purge pump and the purge valve. The ECU, when performing purging, opens the purge valve to control the purge pump at the rated rotational speed, and when stopping purging, closes the purge valve to control the purge pump at a zero rotational speed. When starting purging, the ECU gradually controls the purge pump from a rotational speed lower than the rated rotational speed toward the rated rotational speed before opening the purge valve which is in the closed state, and opens the purge valve when the purge pump reaches a first threshold rotational speed lower than the rated rotational speed during the performing the control.
    Type: Application
    Filed: September 5, 2019
    Publication date: December 9, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Makoto NAKAGAWA
  • Patent number: 11193456
    Abstract: An EGR system is configured to allow a part of exhaust gas discharged from an engine to an exhaust passage to flow as an EGR gas to an intake passage through an EGR passage to return to the engine. The EGR system includes a heating film provided on an inner wall of at least one of the intake passage through which the EGR gas flows, i.e., an intake manifold, and the EGR passage, at least one pair of a positive electrode and a negative electrode to energize the heating film, a water temperature sensor and an intake temperature for detecting a warm-up state of the intake passage and the EGR passage, and an electronic control unit configured to control energization of the heating film from before start of EGR based on the detected warm-up state.
    Type: Grant
    Filed: May 12, 2021
    Date of Patent: December 7, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Kaisho So, Takashi Bessho
  • Patent number: 11193457
    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: Grant
    Filed: July 10, 2020
    Date of Patent: December 7, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Akinari Yasue, Kaisho So
  • Publication number: 20210372352
    Abstract: An EGR system is configured to allow a part of exhaust gas discharged from an engine to an exhaust passage to flow as an EGR gas to an intake passage through an EGR passage to return to the engine. The EGR system includes a heating film provided on an inner wall of at least one of the intake passage through which the EGR gas flows, i.e., an intake manifold, and the EGR passage, at least one pair of a positive electrode and a negative electrode to energize the heating film, a water temperature sensor and an intake temperature for detecting a warm-up state of the intake passage and the EGR passage, and an electronic control unit configured to control energization of the heating film from before start of EGR based on the detected warm-up state.
    Type: Application
    Filed: May 12, 2021
    Publication date: December 2, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Kaisho SO, Takashi BESSHO
  • Patent number: 11187167
    Abstract: An evaporated fuel treatment apparatus includes a canister, a purge passage, a purge pump, a purge valve, and a controller for executing purge control. The controller is configured to switch the purge valve to a closed state or an open state once, subsequently set a concentration sensing flag to ON, and then detect a purge concentration based on a pump downstream pressure or a pump differential pressure at a predetermined timing elapsed by a predetermined time from setting of the concentration sensing flag to ON.
    Type: Grant
    Filed: October 7, 2020
    Date of Patent: November 30, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Yuki Fujita
  • Patent number: 11187194
    Abstract: A fuel vapor processing apparatus includes a casing, an adsorbent, and a mixer. The casing includes an atmospheric port and a purge port. In addition, the casing forms an atmospheric port-side adsorption chamber, an agitation chamber, and a purge port-side adsorption chamber therein. The atmospheric port-side adsorption chamber, the agitation chamber, and the purge port-side adsorption chamber are continuously arranged in a gas flow direction from the atmospheric port through the casing to the purge port. The adsorbent fills the atmospheric port-side adsorption chamber and the purge port-side adsorption chamber. The adsorbent is configured to adsorb and desorb fuel vapor. The mixer is disposed in the agitation chamber and includes a spiral flow forming part configured to spirally guide gas flowing through the agitation chamber.
    Type: Grant
    Filed: July 2, 2019
    Date of Patent: November 30, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Kazuho Murata, Toshihiko Yamauchi
  • Publication number: 20210363950
    Abstract: A sender gauge adaptor includes an adaptor body pressed against a bottom wall of a fuel tank by a spring. The adaptor body includes a suction inlet part having a hollow cylindrical shape that opens downward. Recesses allowing fluid communication between the interior and the exterior of the suction inlet part and projection parts having a polygonal-shaped lower surfaces are alternately arranged in the circumferential direction along a lower end of the suction opening. The adaptor body includes a seat part in surface contact with the bottom wall of the fuel tank at a position below the lower surfaces of the projection parts.
    Type: Application
    Filed: June 8, 2018
    Publication date: November 25, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takehiro YAMAUCHI, Koji YOSHIDA, Takashi KANIE
  • Patent number: 11174824
    Abstract: A fuel tank cover (150) is provided with a flange unit (22) closing an opening of a fuel tank, and a joint member (24) configured to be connected to the flange unit (22) movably in the upward/downward direction. The flange unit (22) includes a side tubular portion (43) extending in the upward/downward direction. The joint member (24) includes a columnar portion (160) extending in the upward/downward direction. The columnar portion (160) is inserted into the side tubular portion (43) movably in the upward/downward direction. A metal retainer (162) is provided to cover an outer circumferential surface of the columnar portion (160).
    Type: Grant
    Filed: March 12, 2019
    Date of Patent: November 16, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Ito, Koji Yoshida, Kensuke Niwa, Shuhei Noguchi
  • Patent number: 11174820
    Abstract: A canister includes a plurality of activated carbon layers for adsorbing vaporized fuel and a purge pump for introducing purge air into the canister to cause purge gas containing the vaporized fuel to flow out of the canister. At least a part of the purge pump is placed in the chamber defined between the activated carbon layers.
    Type: Grant
    Filed: November 13, 2019
    Date of Patent: November 16, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hiroyuki Takahashi, Yoshihiko Honda, Shota Tsukamoto
  • Patent number: 11171554
    Abstract: A stepping motor includes a stator, a rotor rotatably supported by the stator, and an auxiliary magnetic member. The auxiliary magnetic member has a body, side edge parts at both circumferential ends of the body, and an opening between the side edge parts. The auxiliary magnetic member is elastically mounted around a flange of the stator. The auxiliary magnetic member includes, at one of the side edge parts, a projecting part protruding radially inward from a projected inner circumferential surface of the body across the opening.
    Type: Grant
    Filed: May 29, 2019
    Date of Patent: November 9, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Katsuhiko Makino, Shinji Murai
  • Patent number: 11168655
    Abstract: A fuel filter device includes a bag-shaped filter member filtering fuel that is drawn into a fuel pump, an inner frame member retaining the filter member in an expanded state, and a mounting member connected to the inner frame member and serving to communicate an internal space of the filter member with an outside. A valve chamber is defined by the inner frame member and the mounting member, and a check valve serving to prevent backflow of fuel is disposed in the valve chamber. The check valve includes a flat-plate shaped valve body having elasticity. The check valve opens against its weight when the fuel pump is operated, and the check valve closes due to its weight when the operation of the fuel pump is stopped.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: November 9, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Kensuke Niwa, Koji Yoshida, Tatsuki Fukui, Hiroyasu Kariya
  • Publication number: 20210324875
    Abstract: A centrifugal pump includes a motor portion including a rotor rotatably disposed in a rotor chamber and includes a pump portion including an impeller rotatably disposed in a pump chamber. The impeller is coupled to the rotor. The centrifugal pump also includes a casing that separates the rotor chamber from the pump chamber, and a bearing that rotatably supports a rotor shaft of the rotor and to which grease is supplied is provided. Two communication holes extend through the casing and provide fluid communication between the rotor chamber and the pump chamber.
    Type: Application
    Filed: September 17, 2019
    Publication date: October 21, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Nobuhiro KATO, Takashige INAGAKI, Keiji NAKAYA, Hidemasa TORII
  • Patent number: 11148536
    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: Grant
    Filed: April 20, 2018
    Date of Patent: October 19, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru Yoshioka, Naruto Ito, Makoto Fukui
  • Patent number: 11150125
    Abstract: A fuel remaining amount detector may include an arm supported rotatably to a body; an angle sensor configured to output first data in accordance with a relative angle between the body and the arm; a storage circuit configured to store conversion data; and a data conversion circuit configured to convert the first data to second data based on the conversion data. A manufacturing method of the fuel remaining amount detector may include creating the conversion data by performing processing for each of at least three predetermined angles, in which the processing includes: measuring the first data outputted by the angle sensor with the relative angle set to one of the predetermined angles; and storing a value corresponding to the one of the predetermined angles in the storage circuit as a value of the second data in association with the value of the measured first data.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: October 19, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Yuichi Manabe, Nobuo Suzuki