Patents by Inventor Seiji Kasahara

Seiji Kasahara 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: 11125323
    Abstract: Selection solenoid valve (75) controls engagement/disengagement of travel clutch (31, 32) in synchronization with a selecting operation of selector lever (90) that selects a range position of belt-type continuously variable transmission (CVT). Selection solenoid valve abnormality diagnosing unit (8a) is configured to, when performing a selecting operation from no-drive range to drive range, if a time required for travel clutch (31, 32) to be judged to be engaged from a start of selection of the drive range is less than a predetermined time, judge selection solenoid valve (75) to be a maximum hydraulic pressure side abnormality. When performing the selecting operation of drive range?no-drive range?drive range, if a selecting operation speed condition indicating that a no-drive range selection time is shorter than a setting time (Tth) is satisfied, execution of abnormality diagnosis of selection solenoid valve (75) is not permitted. With this configuration, misjudgment is prevented.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: September 21, 2021
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Ken Son, Seiji Kasahara
  • Publication number: 20200182352
    Abstract: Selection solenoid valve (75) controls engagement/disengagement of travel clutch (31, 32) in synchronization with a selecting operation of selector lever (90) that selects a range position of belt-type continuously variable transmission (CVT). Selection solenoid valve abnormality diagnosing unit (Sa) is configured to, when performing a selecting operation from no-drive range to drive range, if a time required for travel clutch (31, 32) to be judged to be engaged from a start of selection of the drive range is less than a predetermined time, judge selection solenoid valve (75) to be a maximum hydraulic pressure side abnormality. When performing the selecting operation of drive range?no-drive range?drive range, if a selecting operation speed condition indicating that a no-drive range selection time is shorter than a setting time (Tth) is satisfied, execution of abnormality diagnosis of selection solenoid valve (75) is not permitted. With this configuration, misjudgment is prevented.
    Type: Application
    Filed: August 28, 2018
    Publication date: June 11, 2020
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Ken SON, Seiji KASAHARA
  • Patent number: 10612651
    Abstract: In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (?·Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: April 7, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu Araki, Hideshi Wakayama, Kouji Saitou, Seiji Kasahara, Tetsuya Izumi
  • Patent number: 10527161
    Abstract: A control device that controls an automatic transmission is provided, in which device the automatic transmission includes a variator disposed in a power transmission path between a driving source and a driving wheel of a vehicle, and a friction engaging element disposed between the variator and the driving wheel, in a manner capable of transmitting a power disconnectably via the power transmission path. The control device increases a speed ratio of the variator toward a predetermined target speed ratio with disengaging the friction engaging element during a vehicle stop of the vehicle, and executes a learning regarding a hydraulic control of the friction engaging element when the friction engaging element is disengaged during the vehicle stop. The control device decreases the target speed ratio at a time of learning when the learning is executed during the vehicle stop, compared to a time of vehicle stop other than the time of learning.
    Type: Grant
    Filed: September 7, 2016
    Date of Patent: January 7, 2020
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu Kawamoto, Seiji Kasahara, Haibin Ma
  • Patent number: 10480648
    Abstract: In a vehicle equipped with a torque converter (4) having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. After acquiring the current learning detection value (M_n), a meet-point learning control unit (12c) calculates the current detection error (E_n) on the basis of the difference between the current learning detection value (M_n) and the previous learning value (L_(n?1)) that is stored. When the current and previous detection errors (E_n) and (E_n?1) have the same plus/minus sign, the current learning value correction amount is set to a larger value if the absolute value |(E_n?1)| of the previous detection error (E_n?1) is large than if the absolute value |(E_n?1)| is small. The sum of the previous learning value (L_(n?1)) and the current learning value correction amount is set as the present learning value (L_n).
    Type: Grant
    Filed: August 31, 2016
    Date of Patent: November 19, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu Araki, Seiji Kasahara, Hideshi Wakayama, Hiroyasu Tanaka
  • Patent number: 10371256
    Abstract: In a vehicle on which a torque converter having a lock-up clutch is mounted between an engine and a transmission, a meet point learning controller is provided to perform learning control for obtaining a learning value based on information on a meet point at which the lock-up clutch starts torque transmission. The meet point learning controller estimates a LU transmission torque based on a difference between an engine torque signal value and a torque converter transmission torque when the lock-up clutch moves from a non-engaged state to an engaged state during traveling of the vehicle, and uses, as the meet point information, a meet point detection pressure at a time when the LU transmission torque estimated value is determined to have entered an upward trend.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: August 6, 2019
    Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu Araki, Seiji Kasahara, Hideshi Wakayama, Kouji Saitou, Hiroyasu Tanaka
  • Publication number: 20180355969
    Abstract: A control device that controls an automatic transmission is provided, in which device the automatic transmission includes a variator disposed in a power transmission path between a driving source and a driving wheel of a vehicle, and a friction engaging element disposed between the variator and the driving wheel, in a manner capable of transmitting a power disconnectably via the power transmission path. The control device increases a speed ratio of the variator toward a predetermined target speed ratio with disengaging the friction engaging element during a vehicle stop of the vehicle, and executes a learning regarding a hydraulic control of the friction engaging element when the friction engaging element is disengaged during the vehicle stop. The control device decreases the target speed ratio at a time of learning when the learning is executed during the vehicle stop, compared to a time of vehicle stop other than the time of learning.
    Type: Application
    Filed: September 7, 2016
    Publication date: December 13, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Yoshinobu KAWAMOTO, Seiji KASAHARA, Haibin MA
  • Publication number: 20180245689
    Abstract: In a vehicle equipped with a torque converter (4) having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. After acquiring the current learning detection value (M_n), a meet-point learning control unit (12c) calculates the current detection error (E_n) on the basis of the difference between the current learning detection value (M_n) and the previous learning value (L_(n?1)) that is stored. When the current and previous detection errors (E_n) and (E_n?1) have the same plus/minus sign, the current learning value correction amount is set to a larger value if the absolute value |(E_n?1)| of the previous detection error (E_n?1) is large than if the absolute value |(E_n?1)| is small. The sum of the previous learning value (L_(n?1)) and the current learning value correction amount is set as the present learning value (L_n).
    Type: Application
    Filed: August 31, 2016
    Publication date: August 30, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu ARAKI, Seiji KASAHARA, Hideshi WAKAYAMA, Hiroyasu TANAKA
  • Publication number: 20180245688
    Abstract: In a vehicle on which a torque converter having a lock-up clutch is mounted between an engine and a transmission, a meet point learning controller is provided to perform learning control for obtaining a learning value based on information on a meet point at which the lock-up clutch starts torque transmission. The meet point learning controller estimates a LU transmission torque based on a difference between an engine torque signal value and a torque converter transmission torque when the lock-up clutch moves from a non-engaged state to an engaged state during traveling of the vehicle, and uses, as the meet point information, a meet point detection pressure at a time when the LU transmission torque estimated value is determined to have entered an upward trend.
    Type: Application
    Filed: August 12, 2016
    Publication date: August 30, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu ARAKI, Seiji KASAHARA, Hideshi WAKAYAMA, Kouji SAITOU, Hiroyasu TANAKA
  • Patent number: 10052807
    Abstract: A fiber manufacturing method includes the following steps of: dissolving a polymer in a solvent to obtain a polymer solution; spraying the polymer solution into a liquid heated to a boiling point of the solvent or higher, and evaporating the solvent to precipitate a fibrous polymer in a sealed precipitation tank, the liquid being immiscible with the polymer and the solvent; conveying the precipitated fibrous polymer in a liquid from the precipitation tank; water-rinsing the fibrous polymer conveyed in the liquid in the conveying step in a sealed water-rinsing tank; conveying the water-rinsed fibrous polymer in a liquid from the water-rinsing tank; and cooling and condensing solvent gas that is generated in the spraying step and the water-rinsing step.
    Type: Grant
    Filed: August 8, 2016
    Date of Patent: August 21, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Yukihiro Katai, Shigehisa Sugiyama, Seiji Kasahara, Yasuhisa Shimoda, Masahiro Esaki
  • Patent number: 10045936
    Abstract: A method is provided which enables a drug to be concentrated at needle-like protruding portions and which further allows transdermal-absorption sheets to be manufactured at high production efficiency. The method repeats a step of feeding a drug-containing solution from a liquid feeding apparatus to a mold and filling needle-like recessed portions with the drug-containing solution through a nozzle aligned over the needle-like recessed portions in a state where the nozzle and a front surface of the mold are brought into contact with each other, and a step of moving the liquid feeding apparatus relative to the mold in a state where the nozzle and the front surface of the mold are brought into contact with each other. Thus, the two-dimensionally arranged needle-like recessed portions are filled with the drug-containing solution.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: August 14, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Aya Mochizuki, Seiji Kasahara, Yanlong Che, Shotaro Ogawa
  • Publication number: 20180216729
    Abstract: In a vehicle equipped with a torque converter 4 having a lock-up clutch (3), learning control for obtaining a learning value (L_n) on the basis of meet-point information, with which the lock-up clutch (3) initiates torque transmission, is carried out. When the lock-up clutch (3) experiences a transition to an engaged state during travel, a meet-point learning control unit (12c) calculates an LU transmission torque estimate on the basis of the difference between the engine torque (engine torque signal value Te) and the torque converter transmission torque (?·Ne2). Excess clutch capacity is detected when the LU transmission torque estimate is greater than an excess capacity determination transmission torque threshold within a prescribed amount of time after an initial pressure (P_n) based on the learning value (L_n) is instructed. When excess clutch capacity is detected, a learning value correction that reduces the learning value (L_n) is carried out.
    Type: Application
    Filed: August 31, 2016
    Publication date: August 2, 2018
    Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.
    Inventors: Toshimitsu ARAKI, Hideshi WAKAYAMA, Kouji SAITOU, Seiji KASAHARA, Tetsuya IZUMI
  • Patent number: 9987236
    Abstract: A transdermal absorption sheet and a manufacturing method for the transdermal absorption sheet includes a laminating step of forming a multilayer film with a viscosity difference by forming, on a support, a lower layer containing a first transdermal absorption material and an upper layer containing a drug and a second transdermal absorption material and having a lower viscosity than the lower layer, a filling step of filling needle-like recessed portions corresponding to inverted needle-like protruding portions with a solution of the transdermal absorption material by pressing a mold in which the needle-like recessed portions are arranged in a two-dimensional array, against a surface of the multilayer film supported by the support to allow the multilayer film to flow, a solidifying step of solidifying the multilayer film with the mold pressed against the surface of the multilayer film, and a peeling-off step of peeling the solidified multilayer film from the mold.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: June 5, 2018
    Assignee: FUJIFILM Corporation
    Inventors: Junya Yoshida, Seiji Kasahara, Takayoshi Oyamada, Yanlong Che
  • Patent number: 9845095
    Abstract: A vehicle control device for controlling a vehicle with a drive source, a friction transmission mechanism provided between the drive source and drive wheels and a fluid transmission mechanism provided between the friction transmission mechanism and the drive source includes a suppression unit configured to suppress a decrease of a speed ratio of the fluid transmission mechanism if the speed ratio becomes negative when the vehicle starts.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: December 19, 2017
    Assignee: JATCO LTD
    Inventors: Seiji Kasahara, Hideshi Wakayama, Naohiro Hoshi
  • Patent number: 9649281
    Abstract: A transdermal absorption sheet and a manufacturing method for the transdermal absorption sheet includes a laminating step of forming a multilayer film with a viscosity difference by forming, on a support, a lower layer containing a first transdermal absorption material and an upper layer containing a drug and a second transdermal absorption material and having a lower viscosity than the lower layer, a filling step of filling needle-like recessed portions corresponding to inverted needle-like protruding portions with a solution of the transdermal absorption material by pressing a mold in which the needle-like recessed portions are arranged in a two-dimensional array, against a surface of the multilayer film supported by the support to allow the multilayer film to flow, a solidifying step of solidifying the multilayer film with the mold pressed against the surface of the multilayer film, and a peeling-off step of peeling the solidified multilayer film from the mold.
    Type: Grant
    Filed: May 12, 2015
    Date of Patent: May 16, 2017
    Assignee: FUJIFILM Corporation
    Inventors: Junya Yoshida, Seiji Kasahara, Takayoshi Oyamada, Yanlong Che
  • Publication number: 20170119691
    Abstract: A transdermal absorption sheet and a manufacturing method for the transdermal absorption sheet includes a laminating step of forming a multilayer film with a viscosity difference by forming, on a support, a lower layer containing a first transdermal absorption material and an upper layer containing a drug and a second transdermal absorption material and having a lower viscosity than the lower layer, a filling step of filling needle-like recessed portions corresponding to inverted needle-like protruding portions with a solution of the transdermal absorption material by pressing a mold in which the needle-like recessed portions are arranged in a two-dimensional array, against a surface of the multilayer film supported by the support to allow the multilayer film to flow, a solidifying step of solidifying the multilayer film with the mold pressed against the surface of the multilayer film, and a peeling-off step of peeling the solidified multilayer film from the mold.
    Type: Application
    Filed: January 11, 2017
    Publication date: May 4, 2017
    Applicant: FUJIFILM Corporation
    Inventors: Junya YOSHIDA, Seiji KASAHARA, Takayoshi OYAMADA, Yanlong CHE
  • Publication number: 20160354964
    Abstract: A fiber manufacturing method includes the following steps of: dissolving a polymer in a solvent to obtain a polymer solution; spraying the polymer solution into a liquid heated to a boiling point of the solvent or higher, and evaporating the solvent to precipitate a fibrous polymer in a sealed precipitation tank, the liquid being immiscible with the polymer and the solvent; conveying the precipitated fibrous polymer in a liquid from the precipitation tank; water-rinsing the fibrous polymer conveyed in the liquid in the conveying step in a sealed water-rinsing tank; conveying the water-rinsed fibrous polymer in a liquid from the water-rinsing tank; and cooling and condensing solvent gas that is generated in the spraying step and the water-rinsing step.
    Type: Application
    Filed: August 8, 2016
    Publication date: December 8, 2016
    Applicant: FUJIFILM Corporation
    Inventors: Yukihiro KATAI, Shigehisa SUGIYAMA, Seiji KASAHARA, Yasuhisa SHIMODA, Masahiro ESAKI
  • Publication number: 20160159359
    Abstract: A vehicle control device for controlling a vehicle with a drive source, a friction transmission mechanism provided between the drive source and drive wheels and a fluid transmission mechanism provided between the friction transmission mechanism and the drive source includes a suppression unit configured to suppress a decrease of a speed ratio of the fluid transmission mechanism if the speed ratio becomes negative when the vehicle starts.
    Type: Application
    Filed: July 8, 2014
    Publication date: June 9, 2016
    Applicant: JATCO Ltd
    Inventors: Seiji KASAHARA, Hideshi WAKAYAMA, Naohiro HOSHI
  • Publication number: 20150238413
    Abstract: A method is provided which enables a drug to be concentrated at needle-like protruding portions and which further allows transdermal-absorption sheets to be manufactured at high production efficiency. The method repeats a step of feeding a drug-containing solution from a liquid feeding apparatus to a mold and filling needle-like recessed portions with the drug-containing solution through a nozzle aligned over the needle-like recessed portions in a state where the nozzle and a front surface of the mold are brought into contact with each other, and a step of moving the liquid feeding apparatus relative to the mold in a state where the nozzle and the front surface of the mold are brought into contact with each other. Thus, the two-dimensionally arranged needle-like recessed portions are filled with the drug-containing solution.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Applicant: FUJIFILM CORPORATION
    Inventors: Aya MOCHIZUKI, Seiji KASAHARA, Yanlong CHE, Shotaro OGAWA
  • Publication number: 20150238434
    Abstract: A transdermal absorption sheet and a manufacturing method for the transdermal absorption sheet includes a laminating step of forming a multilayer film with a viscosity difference by forming, on a support, a lower layer containing a first transdermal absorption material and an upper layer containing a drug and a second transdermal absorption material and having a lower viscosity than the lower layer, a filling step of filling needle-like recessed portions corresponding to inverted needle-like protruding portions with a solution of the transdermal absorption material by pressing a mold in which the needle-like recessed portions are arranged in a two-dimensional array, against a surface of the multilayer film supported by the support to allow the multilayer film to flow, a solidifying step of solidifying the multilayer film with the mold pressed against the surface of the multilayer film, and a peeling-off step of peeling the solidified multilayer film from the mold.
    Type: Application
    Filed: May 12, 2015
    Publication date: August 27, 2015
    Applicant: FUJIFILM Corporation
    Inventors: Junya YOSHIDA, Seiji KASAHARA, Takayoshi OYAMADA, Yanlong CHE