Patents Assigned to Aisan Kogyo Kabushiki Kaisha
  • Patent number: 11994446
    Abstract: A deterioration estimator for an electronic throttle device allows a throttle valve to be driven by a drive mechanism. The throttle valve is continuously operated to open and/or close. If operated to open, it opens from a first opening position, which is on a closed side from an opener opening position and in which the throttle valve is biased to an open side by an opener mechanism, to a second opening position, the second opening position being on an open side from the opener opening position with the throttle valve being biased to the closed side by the opener mechanism. If operated to close, the throttle valve is operated to close from the second opening position to the first opening position. A deteriorated condition of the electronic throttle device is estimated by detecting a behavior of the drive mechanism when the throttle valve passes by the opener opening position.
    Type: Grant
    Filed: December 13, 2022
    Date of Patent: May 28, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Kazuki Nagao, Koki Hirata
  • Publication number: 20240118719
    Abstract: A valve system includes a tank, a valve member, a driving device configured to move the valve member for opening and closing the tank, and a control unit. The circuit of the control unit is programmed to move the valve member in the open direction after beginning of a process, and then reverse a direction of movement of the valve member to a standby position in a valve closed state. If the first rate of pressure change in the internal pressure of the tank since the cycle began is greater than a target rate of change, the circuit determines a waiting time such that a second rate of pressure change of the internal pressure from the start to the end of the cycle is equal to the target rate of change, and then keeps the driving device in the standby position until the determined waiting time has elapsed.
    Type: Application
    Filed: September 18, 2023
    Publication date: April 11, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Masafumi YAMAGATA
  • Publication number: 20240084921
    Abstract: A valve system that can quickly estimate the valve opening position including a tank to store fluid, a pressure sensor having a valve element to detect an internal pressure of the tank, a valve to open and close the tank, a driving device to stroke the valve element of the valve, and a control unit.
    Type: Application
    Filed: August 28, 2023
    Publication date: March 14, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Masafumi YAMAGATA
  • Patent number: 11927147
    Abstract: A pump unit may include a pump configured to increase a pressure of diesel fuel and discharge the diesel fuel to a fuel passage in which a filter is disposed, and a controller configured to control an operation of the pump. The controller may be configured to execute freeze avoidance control in which the operation of the pump is controlled using an index that indicates a degree of clogging of the filter caused by the diesel fuel freezing. In the freeze avoidance control, the controller may be configured to apply a higher load to the pump as the degree of clogging of the filter indicated by the index is higher.
    Type: Grant
    Filed: July 27, 2020
    Date of Patent: March 12, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Yukihiko Yato
  • Publication number: 20240068580
    Abstract: A passage switching device to switch flow passages includes a rotary disk and a fixed disk which are stacked in an axial direction. The rotary disk is provided with at least one rotary disk communication path penetrating in the axial direction, and the fixed disk is provided with a plurality of fixed disk communication paths penetrating in the axial direction. The flow passages are switched by rotating and driving the rotary disk to switch combination of the rotary disk communication path and the fixed disk communication path for communication. There is provided an elastic member between the housing and the rotary disk, between the rotary disk and the fixed disk, and between the fixed disk and the housing with respect to the axial direction.
    Type: Application
    Filed: August 2, 2023
    Publication date: February 29, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Shinji KAWAI, Mamoru YOSHIOKA
  • Patent number: 11916503
    Abstract: When the duty command value is less than or equal to a threshold value, the motor control device performs the complementary PWM control, and when the duty command value is greater than the threshold value, it sets, for the first element, a first period in which the first element remains turned on and a second period in which control is performed with a corrected duty cycle to turn off the first element for a longer period, and performs average PWM control of which average duty cycle in a total period of the first and second periods is same as a set duty cycle. The motor control device turns on the second element while the first element is turned off in the second period.
    Type: Grant
    Filed: July 30, 2020
    Date of Patent: February 27, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hisashi Yamamoto, Yukihiko Yato
  • Patent number: 11913412
    Abstract: A poppet-type EGR valve includes: a housing that includes a flow passage; a valve seat; a valve body allowed to be seated on the valve seat; a valve shaft on which the valve body is provided at one end section thereof; and a drive unit reciprocally driving the valve shaft. The flow passage has an inlet and an outlet and includes a bent passage portion that is bent downstream from the valve seat in a direction perpendicular to the direction toward the inlet. The bent passage portion includes at least one of a section in which the passage area is constant and a section in which the passage area increases toward the downstream direction, and does not include a section in which the passage area decreases toward the downstream direction. In the section in which the passage area increases toward the downstream direction, the passage area changes gradually.
    Type: Grant
    Filed: August 18, 2020
    Date of Patent: February 27, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Naoya Suzuki, Koichi Sugihara
  • Patent number: 11898579
    Abstract: An ejector having a nozzle for jetting a hydrogen gas (working fluid), wherein the nozzle includes an inner nozzle and an outer nozzle, both the nozzles are disposed to encompass an axis of a diffuser, an axis of the inner nozzle or an axis of the outer nozzle is arranged to align with the axis, an inner jet hole through which the hydrogen gas flows is formed in the inner nozzle, an outer jet hole having a ring-shaped cross section through which the hydrogen gas flows is provided between the inner nozzle and the outer nozzle, the outer jet hole when a main body casing is horizontally disposed includes an upper hole portion above the axis and a lower hole portion under the axis, and the inner nozzle and the outer nozzle are mutually eccentrically disposed so that the lower hole portion is narrower than the upper hole portion.
    Type: Grant
    Filed: September 20, 2019
    Date of Patent: February 13, 2024
    Assignees: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobutaka Teshima, Masaaki Matsusue
  • Publication number: 20240044295
    Abstract: A throttle device includes a rotating member coupled to a throttle shaft and rotated by a drive source, and a coil spring interposed between a throttle body and the rotating member and configured to bias the throttle valve toward a default position. The coil spring has a first spring portion, a second spring portion, and an intermediate hook portion for connecting the first spring portion and the second spring portion. The rotating member includes an inner periphery supporting portion that supports an inner peripheral side of the first spring portion, an outer periphery supporting portion that supports an outer peripheral side of the first spring portion, and a blocking structure for preventing the first spring portion from being fitted to an outside of the outer periphery supporting portion when assembling the coil spring.
    Type: Application
    Filed: August 4, 2023
    Publication date: February 8, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Yuichi KIMURA
  • Patent number: 11891969
    Abstract: A fuel-feeding device may include a fuel tank storing fuel therein, a fuel pump configured to feed the fuel in the fuel tank to an engine through a fuel-feeding conduit, an aspirator configured to generate a negative pressure therein using a flow of the fuel flowing through a branched conduit branched from the fuel-feeding conduit, a negative pressure sensor configured to detect the negative pressure generated by the aspirator, and a control device configured to control a revolution speed of the fuel pump. The control device is configured to determine a sign of vapor generation in the fuel stored in the fuel tank based on detection information of the negative pressure sensor.
    Type: Grant
    Filed: November 28, 2022
    Date of Patent: February 6, 2024
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Yuya Tanida, Keita Suzuki
  • Publication number: 20240021915
    Abstract: A battery temperature adjusting device includes a battery pack, a heat-exchange part for exchanging heat between the battery pack and a heat medium, and a heat medium circuit for flowing the heat medium to the heat-exchange part to adjust the temperature of the battery pack by flowing the heat medium to the heat-exchange part through the heat medium circuit to exchange heat with the battery pack. The heat medium circuit includes a warming circuit for flowing a warming medium to the heat-exchange part to warm the battery pack, and a cooling circuit for flowing a cooling medium to the heat-exchange part to cool the battery pack. The battery temperature adjusting device further includes a circuit switching unit switches between the circuits to connect the warming circuit to the heat-exchange part in warming the battery pack or to connect the cooling circuit to the heat-exchange part in cooling the battery pack.
    Type: Application
    Filed: July 3, 2023
    Publication date: January 18, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Mamoru YOSHIOKA, Shinji KAWAI
  • Publication number: 20240011509
    Abstract: An ejector includes an inner nozzle, an outer nozzle internally provided with the inner nozzle, and an outer injection port between the inner nozzle and the outer nozzle. The ejector is operated to suck a target fluid by negative pressure generated by a working fluid injected from the inside of the inner nozzle or/and the outer injection port, and discharge the target fluid merged with the working fluid. The ejector further includes a nozzle guide placed in the gap between the inner nozzle and the outer nozzle and configured to restrict the interval of the outer injection port.
    Type: Application
    Filed: June 26, 2023
    Publication date: January 11, 2024
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Sadatsugu NAGATA
  • Patent number: 11852110
    Abstract: An evaporated fuel treatment apparatus includes an electrically-operated valve disposed between a full tank control valve and an atmosphere open port and a control unit that controls the electrically-operated valve, and the control unit performs valve-closing control that fully closes the electrically-operated valve when a valve-closing condition is satisfied after the start of fuel supply, in which a value measured by a fuel volume measurement unit is equal to or greater than a first predetermined value determined in advance and a value detected by a pressure sensor is equal to or greater than a second predetermined value determined in advance.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: December 26, 2023
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Naohito Buseki, Mariko Kawase
  • Patent number: 11852107
    Abstract: A leakage detector includes a pressure sensor for detecting the pressure in a detecting target area of the fuel vapor treatment system and a controller. The controller measures the pressure in the detecting target area at a certain point in time. The controller then determines whether the measured pressure satisfies a condition for leakage detection by a vapor pressure device. When the controller determines that the condition is satisfied, the controller selects the vapor pressure device. When the controller determines that the condition is not satisfied, the controller predicts the change in vapor pressure at a subsequent temperature based on a saturated vapor pressure characteristic of the fuel. If it is determined the pressure in the detecting target will satisfy a predetermined condition, the controller selects a pressure application device. If it is determined that the predetermined condition will be satisfied, the controller selects the vapor pressure device.
    Type: Grant
    Filed: May 11, 2022
    Date of Patent: December 26, 2023
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Yuya Tanida, Mariko Kawase
  • Patent number: 11826843
    Abstract: A method of producing a throttle device includes setting an angle between a fully closed position and a default position to a predetermined angle by processing at least one of a gear-side fully closed position stopper on a throttle gear, a body-side fully closed position stopper on a throttle body, a default position defining member, a body-side engaging portion of the throttle body, or a gear-side engaging portion of the throttle gear.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: November 28, 2023
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Toshihide Kokubu, Mitsushi Taniguchi, Yuichi Kimura
  • Patent number: 11821394
    Abstract: A fuel supply apparatus to be mounted in a vehicle includes an injector, a rear delivery pipe and a front delivery pipe connected to the injector, and a fixed flange that is provided in the rear delivery pipe to fix the rear delivery pipe to a PCU. The fixed flange includes a cutout.
    Type: Grant
    Filed: October 29, 2021
    Date of Patent: November 21, 2023
    Assignees: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Nobutaka Teshima, Tetsuji Aishima
  • Publication number: 20230349685
    Abstract: A rotation angle detecting device includes a rotating magnet and a sensor configured to detect a rotation angle based on the change in direction of a magnetic flux line generated from the magnet. The magnet includes a first magnetic body and a second magnetic body, which are symmetric about a plane along an axis of rotation. Each of the magnetic bodies has an N pole and an S pole magnetized in the direction of the axis of rotation X. The magnetic poles of rotating surfaces of the magnetic bodies that face the sensor are different. As a result, the length of the magnetic flux line that passes through the sensor is reduced, thereby suppressing a reduction in magnetic field strength and suppressing errors in the angle of the magnetic flux line resulting from an external disturbance magnetic field.
    Type: Application
    Filed: September 22, 2021
    Publication date: November 2, 2023
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventor: Makoto MASE
  • Patent number: 11781511
    Abstract: A fuel supply device includes a flange unit and a pump unit. The flange unit includes a flange main body for closing an opening formed in an upper wall of a fuel tank. The pump unit includes a joint member that is connected to the flange main body so that both components may be movable relative to each other in the vertical direction. The interval in the vertical direction between the flange main body and the joint member is restricted from going below a minimum vertical interval. The minimum interval occurs when a stand-off portion provided as part of the flange main body and a connecting plate portion provided as part of the joint member come into mutual contact with each other and abut each other in the vertical direction.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: October 10, 2023
    Assignees: AISAN KOGYO KABUSHIKI KAISHA, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensuke Niwa, Koji Yoshida, Akira Iida, Shinya Higashi, Morihiro Takemura, Hiroyasu Kariya, Tatsuki Fukui, Takuhito Fujiwara, Takeaki Morizono, Takehiro Yamauchi, Ryosuke Hayashi
  • Patent number: 11780327
    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: Grant
    Filed: March 18, 2021
    Date of Patent: October 10, 2023
    Assignee: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Satoshi Yagi, Norihiro Kondo, Yoshihiro Yasuda
  • Publication number: 20230304583
    Abstract: In a flow rate control valve, a valve seat includes an annular base part and an annular seal part provided on the inner periphery thereof. A body includes a contact surface with which an end of the base part in the axial direction contacts and a press-fit surface against which the outer peripheral surface of the base part is press-fitted. The seal part includes: a seat surface at an end on an opposite side to the contact surface in the axial direction to contact a valve element to seal between the valve seat and the valve element in a valve closed state; and a valve-seat-to-body sealing portion protruding toward the contact surface more than the base part at an end on the side of the contact surface in the axial direction and contacting the contact surface to seal between the valve seat and the body.
    Type: Application
    Filed: June 1, 2021
    Publication date: September 28, 2023
    Applicant: AISAN KOGYO KABUSHIKI KAISHA
    Inventors: Hirofumi HASHIBA, Shohei KOMATSU, Shigehito SUZUKI