Patents by Inventor Takumi Araki

Takumi Araki 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: 20240092337
    Abstract: A vehicle control apparatus includes front-wheel and rear-wheel driving systems, and a control system. The front-wheel driving system includes a first travel motor mechanically coupled to a front wheel of a vehicle and a first accumulator electrically coupled to the first travel motor. The rear-wheel driving system includes a second travel motor mechanically coupled to a rear wheel of the vehicle and a second accumulator electrically coupled to the second travel motor. The control system includes one or more processors and one or more memories communicably coupled to the one or more processors, and controls the first and second travel motors. When a difference between an SOC of the first accumulator and an SOC of the second accumulator is greater than a threshold value, the one or more processors change a torque distribution ratio between the first and second travel motors from a reference distribution ratio.
    Type: Application
    Filed: September 13, 2023
    Publication date: March 21, 2024
    Inventors: Hiroshi KUSANO, Yoshinobu YAMAZAKI, Masami OGURI, Akihiro NABESHIMA, Yoshiyuki JIN, Takeshi YONEDA, Fumiya SATO, Keigo YAMADA, Takumi ARAKI, Shuntaro MIURA
  • Publication number: 20230382390
    Abstract: A vehicle includes a first detector detecting first information related to a condition of a first road surface; a second detector contactlessly detecting second information related to a condition of a second road surface; and a controller controlling a driving force of the vehicle using a friction coefficient estimated based on the first and/or second information. A processor(s) of the controller execute(s) a process including: determining whether the conditions are of a same type based on the first and second information; when the conditions are of different types, controlling the driving force using a friction coefficient estimated based on the second information as a friction coefficient of the second road surface; and based on determining that the conditions are of the same type, controlling the driving force using a friction coefficient estimated based on the first information as the road surface friction coefficient of the second road surface.
    Type: Application
    Filed: April 28, 2023
    Publication date: November 30, 2023
    Inventors: Fumiya Sato, Yoshinobu Yamazaki, Akihiro Nabeshima, Yoshiyuki Jin, Takeshi Yoneda, Hiroshi Kusano, Keigo Yamada, Takumi Araki, Shuntaro Miura
  • Publication number: 20230373295
    Abstract: A drive system for a four-wheel drive vehicle including a friction brake system includes a first motor and a second motor, a propeller shaft for transmitting power between a front-wheel side and a rear-wheel side, a first differential mechanism configured to divide output torque of the first motor between a left wheel on one side of the front-wheel side and the rear-wheel side and the other side, a second differential mechanism configured to divide output torque of the second motor between a right wheel on the one side and the other side, and a control device for controlling regenerative braking force related to the first motor and the second motor and friction braking force related to the friction brake system. The first and second differential mechanisms are configured such that the ratio of output torque allocated to the front-wheel side is 50% or more.
    Type: Application
    Filed: May 8, 2023
    Publication date: November 23, 2023
    Inventors: Yoshinobu YAMAZAKI, Masami OGURI, Akihiro Nabeshima, Yoshiyuki JIN, Takeshi YONEDA, Fumiya SATO, Hiroshi KUSANO, Keigo YAMADA, Takumi ARAKI, Shuntaro MIURA
  • Publication number: 20230311671
    Abstract: An electric vehicle includes a motor and a controller. The controller is configured to; based on determining that the electric motor is in the locked state, set a search target torque greater than a value of torque demanded by a driver, and execute a increase of the motor torque up to the set target torque; upon making a determination that the locked state is ceased, store a value of the target torque at a time of making the determination, and execute a decrease of the target torque; and when a second value of the torque demanded by the driver becomes the value of the target torque or more after the decrease of the target torque, set a second value of the target torque in accordance with the second value of the torque demanded by the driver, and drive the electric motor in accordance with the set target torque.
    Type: Application
    Filed: March 21, 2023
    Publication date: October 5, 2023
    Applicant: SUBARU CORPORATION
    Inventors: Keigo YAMADA, Yoshinobu YAMAZAKI, Yoshiyuki JIN, Akihiro NABESHIMA, Takeshi YONEDA, Fumiya SATO, Hiroshi KUSANO, Takumi ARAKI, Shuntaro MIURA
  • Publication number: 20230294525
    Abstract: A power distribution apparatus for an electric vehicle includes a power distribution mechanism configured to distribute power output from an electric motor to front and rear wheels, and a controller configured to control the power distribution mechanism. The power distribution mechanism includes a first clutch configured to fix a power distribution ratio during straight traveling to a first distribution ratio at which first power distributed to the rear wheels and second power distributed to the front wheels are nearly same, and a second clutch configured to fix the power distribution ratio during straight traveling to a second distribution ratio at which the first power is larger than the second power. The controller is configured set the second clutch to an engaged state and sets the first clutch to a half-engaged state during regenerative braking.
    Type: Application
    Filed: March 3, 2023
    Publication date: September 21, 2023
    Applicant: SUBARU CORPORATION
    Inventors: Yoshinobu YAMAZAKI, Masami OGURI, Akihiro NABESHIMA, Yoshiyuki JIN, Takeshi YONEDA, Fumiya SATO, Hiroshi KUSANO, Keigo YAMADA, Takumi ARAKI, Shuntaro MIURA, Susumu ITO
  • Patent number: 6589645
    Abstract: The present invention relates to a laminated member comprising a polyethylene resin composition layer having a very high adhesive strength to a substrate, and a method for manufacturing the same. The present invention is directed to a method for manufacturing the laminated member, which has a high adhesive strength to a different kind of substrate within a range from low to high temperature, and can reduce the resin temperature during the extrusion-lamination molding and inhibit any noxious influence on the working and surrounding environments, and is also superior in terms of high-speed mold ability at low temperature, and the laminated member. In the present invention, a compound having a specific structure is incorporated into a polyethylene resin composition layer. The present invention can be used to particular advantage in laminate products such as packaging material.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: July 8, 2003
    Assignees: Fuji Photo Film Co., Ltd., Japan Polyolefins Co., Ltd.
    Inventors: Kazuo Ozaki, Tadahiro Kegasawa, Ryuichi Katsumoto, Takumi Araki, Toshio Taka
  • Patent number: 6521734
    Abstract: The invention relates to a low-density polyethylene resin for laminates, a composition thereof, and a laminate and production method therefor. The low-density polyethylene resin is one obtainable by a high pressure radical polymerization method and has a density of 0.910 to 0.935 g/cm3, a melt flow rate of 0.1 to 300 g/10 min., and a terminal vinyl group number of 0.4 or more per 1,000 carbon atoms. According to the invention, a laminate having high interlayer adhesion strength can be obtained also by low-temperature, high-speed molding so that the occurrence of smoking and odor can be prevented. Also, the resin is excellent in productivity and economics. Further, the resin is excellent in productivity and economics because it can be readily made thinner. The laminate is suitable for application to, for example, food wrapping materials, containers, etc.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: February 18, 2003
    Assignee: Japan Polyolefins Co., Ltd.
    Inventors: Takumi Araki, Isao Hashimoto, Toshio Taka
  • Patent number: 5206092
    Abstract: A release material of a good release property is prepared by shaping a resin composition comprising a thermoplastic polyolefin resin, a dimethylpolysiloxane and a functional compound, irradiating the shaped composition with electron beams, and if desired, heat-treating the shaped composition.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: April 27, 1993
    Assignee: Showa Denko K.K.
    Inventors: Takumi Araki, Hiroyuki Nagaishi, Shigeru Kurosawa