Patents Assigned to Aisan Kogyo Kabushiki Kaisha
  • CONTROL DEVICE OF SUPERCHARGER-EQUIPPED ENGINE
    Publication number: 20210317795
    Abstract: A throttle device is provided at the intake passage downstream of a compressor, a purge passage is connected to the intake passage upstream from the compressor, a purge valve is provided in the purge passage, an inlet valve is provided upstream of a connection position between the purge passage and the intake passage, and an air flow meter is provided in the intake passage upstream of the inlet valve. An electronic control device: calculates a target purge flow rate (TPFR) for vapor to the intake passage while the throttle device is controlled to a prescribed opening degree and the inlet valve is controlled to a target intake opening degree (TIOP); calculates the target purge opening degree to ensure the TPFR; controls the purge valve to the TIOP and corrects the TIOP by the TPFR; and controls the inlet valve by the corrected TIOP.
    Type: Application
    Filed: June 7, 2019
    Publication date: October 14, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Takehide NAKAMURA
  • Fuel Vapor Treatment System
    Publication number: 20210317804
    Abstract: A fuel vapor treatment system includes a plurality of adsorbent sections arranged in series and configured to adsorb fuel vapor, a tank port in fluid communication with a fuel tank, a purge port in fluid communication with an engine, an atmospheric port in fluid communication with a surrounding atmosphere, and a constriction plate disposed adjacent to an atmospheric side end of the adsorbent section of the plurality of adsorbent sections that is most proximal the atmospheric port. The constriction plate is positioned adjacent the adsorbent section without an intermediate space formed therebetween. The constriction plate has a plurality of through holes. The total cross-sectional area of the through holes in the constriction plate is smaller than a cross-sectional area of a flow passage in the atmospheric port.
    Type: Application
    Filed: April 12, 2021
    Publication date: October 14, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hiroaki KITANAGA, Yuya TANIDA
  • Canister Mounting Structure
    Publication number: 20210300177
    Abstract: A vehicle canister mounting structure for a vehicle, the vehicle including a frame and an upper structure, such as a cabin, mounted on the frame, includes a primary bracket and a secondary bracket. The primary bracket is fastened to the frame by a primary fastener. The secondary bracket is fastened to the primary bracket by a secondary fastener and is attached to a canister. One of the primary fastener and the secondary fastener is configured to allow fastening to be performed from above the frame. The other of the primary and secondary fasteners is configured to allow fastening to be performed from below the frame.
    Type: Application
    Filed: March 18, 2021
    Publication date: September 30, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi YAGI, Norihiro KONDO, Yoshihiro YASUDA
  • Throttle Device
    Publication number: 20210301738
    Abstract: A throttle device includes a throttle body, a throttle valve, a throttle shaft, a throttle gear, and a coil spring. A cylindrical spring guide disposed in the coil spring is provided on the throttle body. A full-close stopper and a full-open stopper arranged at a prescribed interval in a circumferential direction are provided on the spring guide. A fully closed opening regulation lever includes a full-close abutment configured to abut against the full-close stopper and full-open abutment configured to abut against the full-open stopper.
    Type: Application
    Filed: August 9, 2019
    Publication date: September 30, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Shinya YAMAGUCHI, Toshihide KOKUBU
  • Dust Filter
    Publication number: 20210291099
    Abstract: A dust filter includes a filter medium configured to filter foreign substances, such as dust, from atmospheric air. The dust filter also includes a case within which the filter medium is disposed. A first chamber in the case on one side of the filter medium defines a clean side, and a second chamber in the case on the other side of the filter medium defines a dirty side. The case includes a first port that provides fluid communication between the first chamber and the air passage, and a second port that provides fluid communication between the second chamber and the surrounding atmosphere. The second port is configured to allow water accumulated in the case to drain to the outside of the case by gravity while the case is mounted on the vehicle.
    Type: Application
    Filed: March 1, 2021
    Publication date: September 23, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Takumi TSUCHIYA, Norihiro KONDO
  • Canister
    Publication number: 20210285407
    Abstract: A canister includes a casing and a plate-shaped partition member disposed in the casing. The partition member includes an outer frame portion and a crosspiece portion disposed within the outer frame portion. The crosspiece portion includes an upstream crosspiece portion and a downstream crosspiece portion. The crosspiece members of the downstream crosspiece portion are oriented in a direction intersecting with the crosspiece members of the upstream crosspiece portion. Downstream surfaces of the crosspiece members of the upstream crosspiece portion are integrated with upstream surfaces of the crosspiece members of the downstream crosspiece portion.
    Type: Application
    Filed: March 10, 2021
    Publication date: September 16, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Kazuho MURATA
  • Cover for fuel tank
    Patent number: 11118549
    Abstract: A cover for a fuel tank includes a flange unit configured to close an opening of the fuel tank and a joint member connected to the flange unit. The joint member is movable in an upward/downward direction. The flange unit includes a side tubular portion extending in the upward/downward direction. The joint member includes a support column portion extending in the upward/downward direction. The support column portion is movably disposed in the side tubular portion so as to be movable in the upward/downward direction. The support column portion is connected to the side tubular portion by a snap-fit so as to be movable and suspendable in the upward/downward direction.
    Type: Grant
    Filed: February 14, 2019
    Date of Patent: September 14, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Ito, Koji Yoshida, Kensuke Niwa, Masashi Go, Takashi Kanie
  • Evaporated fuel processing device and control device
    Patent number: 11118538
    Abstract: An evaporated fuel processing device includes a canister to which evaporated fuel generated in a fuel tank adheres; a purge passage passed through purge gas and connecting the canister and an intake pipe of an engine; a purge control valve provided on the purge passage and controlling a supply amount of the purge gas to the intake pipe by changing a duty cycle; a pump provided on the purge passage and feeding the purge gas from the canister to the intake pipe; and a controller control the duty cycle of the purge control valve. The controller detects a pressure difference between pressures at upstream and downstream ends of the purge passage while the purge gas is supplied, and corrects the duty cycle based on a supply amount of the purge gas with respect to the duty cycle with no influence of the pump, by using the detected pressure difference.
    Type: Grant
    Filed: May 15, 2018
    Date of Patent: September 14, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Makoto Nakagawa
  • Engine system
    Patent number: 11118542
    Abstract: This engine system is provided with a throttle device, an EGR valve, and an ECU. The ECU diagnoses an abnormality of the EGR valve on the basis of an operating state during an engine deceleration, and diagnoses combustion deterioration of an engine on the basis of a crank angle speed change during the engine deceleration (not during a fuel cut-off). The ECU executes an engine stall avoidance control with the throttle device when it is determined there is an abnormality in the EGR valve, makes a final determination that the EGR valve has an abnormality and continues the engine stall avoidance control when it is determined thereafter that there is combustion deterioration, and makes a final determination that the EGR valve is normal and cancels the engine stall avoidance control when it is determined that there is no combustion deterioration.
    Type: Grant
    Filed: April 4, 2019
    Date of Patent: September 14, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Masanao Kurita, Masateru Nagao
  • Evaporated fuel treatment apparatus
    Patent number: 11118539
    Abstract: In an evaporated fuel treatment apparatus including a bypass passage branching from an atmosphere passage and connected to a canister by detouring around at least one ii and a bypass valve to open and close the bypass passage, a controller holds the bypass valve in a closed state until an integrated purge flow rate reaches a predetermined value after start of purge control, the integrated purge flow rate being an integrated value of flow rate of purge gas flowing through a purge passage. When the integrated purge flow rate reaches the predetermined value, the controller turns the bypass valve to an open state.
    Type: Grant
    Filed: July 14, 2020
    Date of Patent: September 14, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Yoshikazu Miyabe, Masanobu Shinagawa
  • EGR SYSTEM
    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
  • Motor
    Publication number: 20210281140
    Abstract: A motor includes a stator and a rotor having a rotor shaft. The motor includes a bearing having an inner ring and an outer ring that are configured to rotate relative to each other. The inner ring is supported by the rotor shaft. The motor also includes a holder that supports the outer ring. The holder is clearance-fitted to a retainer on a stator side. A rotation prevention apparatus configured to prevent the rotation of the holder is positioned between the holder and a stopper member on the stator side.
    Type: Application
    Filed: July 19, 2019
    Publication date: September 9, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Nobuhiro KATO, Takashige INAGAKl, Hidemasa TORII, Keiji NAKAYA, Takuhito FUJIWARA
  • Flow Control Valve
    Publication number: 20210278010
    Abstract: A flow control valve includes a housing having a valve chamber, an inlet port, an outlet port, and a valve seat. In addition, the flow control valve includes a valve body disposed in the valve chamber, an actuator having an output rotational shaft, a feed screw mechanism to convert forward and reverse rotational motion of the output rotational shaft to axial reciprocating motion of the valve body, a backlash preventive spring positioned between the housing and the valve body, and a spring supporting device formed on the housing and having a spring seating surface. The spring seating surface is spaced from the valve seat in an opening direction of the valve body.
    Type: Application
    Filed: March 3, 2021
    Publication date: September 9, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Shinji MURAl
  • EVAPORATED FUEL TREATMENT APPARATUS
    Publication number: 20210270196
    Abstract: In this evaporated fuel treatment apparatus, there are set a purge condition that is a condition for performing purge control, a first pre purge condition that is met before the purge condition is met, and a second pre purge condition that is met between the purge condition and the first pre purge condition. A purge pump is driven at an idling speed lower than a rated speed to execute idle rotation when the first pre purge condition is met. The purge pump is driven at the rated speed to execute rated rotation when the second pre purge condition is met. A purge valve is opened while the rated rotation is performed when the purge condition is met.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 2, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Yuki FUJITA
  • EVAPORATED FUEL PROCESSING DEVICE
    Publication number: 20210270215
    Abstract: An evaporative fuel processing device includes a canister, a purge path connected to the canister and an intake path that is connected to an internal combustion engine and through which purge gas flows from the canister to the intake path, and a flow control valve provided in the purge path to control the flow rate of the purge gas, wherein: the device further includes a first pressure detection unit that detects a first pressure at a first position between the canister and the flow control vale, and a concentration estimation unit that estimates a purge concentration of the purge gas flowing in the purge path; and the concentration estimation unit determines an increase in the first pressure generated by closing the flow control valve based on the detection value from the first pressure detection unit, and estimates the purge concentration based on the determined increase in the first pressure.
    Type: Application
    Filed: May 29, 2019
    Publication date: September 2, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Makoto NAKAGAWA, Takahiro SEKO
  • Leakage Diagnosis Device for Fuel Vapor Processing Apparatus
    Publication number: 20210270213
    Abstract: A leakage diagnosis device is configured to detect leakage from a fuel vapor processing apparatus based on the internal pressure thereof. The fuel vapor processing apparatus includes a fuel tank and a canister in fluid communication with each other via a vapor passage. The leakage diagnosis device includes a negative pressure generator configured to generate a negative pressure therein to move gas from the canister to the fuel tank via a bypass passage. The vapor passage has an electrically controlled closing valve and a first mechanical check valve that are arranged in parallel. The first mechanical check valve is configured to be opened without electrical control to allow the fluid flow from the fuel tank to the canister. The bypass passage has a second mechanical check valve configured to be opened without electrical control to allow the fluid flow from the canister to the fuel tank.
    Type: Application
    Filed: February 21, 2021
    Publication date: September 2, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Naohito BUSEKI, Masanobu SHINAGAWA
  • Fuel Vapor Processing Apparatus
    Publication number: 20210270216
    Abstract: A fuel vapor processing apparatus includes a casing forming a flow passage, a first adsorption chamber disposed on one end of the flow passage and configured to store a first adsorbent, a fourth adsorption chamber disposed on the other end of the flow passage and configured to store a fourth adsorbent, and a second adsorption chamber and a third adsorption chamber disposed in series between the first adsorption chamber and the fourth adsorption chamber, the second and third adsorption chambers configured to store a second adsorbent and a third adsorbent, respectively. The first adsorption chamber and the fourth adsorption chamber are disposed adjacent to each other so as to allow heat to be exchanged therebetween.
    Type: Application
    Filed: February 2, 2021
    Publication date: September 2, 2021
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hiroaki KITANAGA, Yuya TANIDA, Hiroyuki TAKAHASHI
  • EGR valve
    Patent number: 11105303
    Abstract: An exhaust gas recirculation valve that includes a recirculation passage through which the exhaust gas flows; a valve seat press-fitted onto an inner surface of the recirculation passage; a valve body configured to sit on the valve seat; and a shaft extending through an inside and outside of the recirculation passage and fixed to the valve body and configured to move the valve body relative to the valve seat, in which corrosion-resistant coating is not provided on a portion of the inner surface of the recirculation passage that contacts a peripheral surface of the valve seat, and the corrosion-resistant coating is provided on another portion of the inner surface of the recirculation passage that contacts an end surface of the valve seat in a direction of press-fitting.
    Type: Grant
    Filed: January 10, 2020
    Date of Patent: August 31, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Koichi Sugihara
  • Liquid level detection unit
    Patent number: 11105672
    Abstract: A liquid surface detecting unit includes a reservoir cup; a body attached to a side wall of the reservoir cup; an arm rotatably supported by the body; a sensor unit stored in the body and configured to detect rotating motion of the arm; a terminal unit extending from the sensor unit; and a wire harness connected to the terminal unit and extending to an outside of the body. The body may include a groove surrounding and guiding the wire harness together with the side wall of the reservoir cup, the wire harness extending from the terminal unit to the outside of the body.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: August 31, 2021
    Assignee: Aisan Kogyo Kabushiki Kaisha
    Inventors: Yuichi Manabe, Nobuo Suzuki
  • Evaporated fuel treatment apparatus
    Patent number: 11105283
    Abstract: In an evaporated fuel treatment apparatus, a controller performs first purge concentration determination control by gradually increasing a purge flow rate in increments of a predetermined amount and detect a purge concentration based on a detection value of the pressure sensor. As the first purge concentration determination control, the controller performs a control to prohibit changing of an operating state of the purge pump or changing of an open state of the purge valve until a detected concentration determination time at which a variation range of the purge concentration detected based on a detection value of a pressure sensor becomes equal to or less than a predetermined value.
    Type: Grant
    Filed: October 13, 2020
    Date of Patent: August 31, 2021
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Makoto Nakagawa, Yoshihiko Honda