Patents by Inventor Masatoshi Udagawa

Masatoshi Udagawa 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).

  • Canister
    Patent number: 5304235
    Abstract: A canister includes a casing, a fuel reserve well defined at the bottom of the casing, an adsorbent layer provided in the casing for adsorbing fuel vapor, the adsorbent layer communicating with the fuel reserve well at a region of its lower portion and communicating with an atmosphere at its upper portion, a first communication passage defined so that the fuel reserve well communicates with a fuel system of an engine, and a second communication passage defined so that the fuel reserve well communicates with an intake system o f the engine.
    Type: Grant
    Filed: April 2, 1992
    Date of Patent: April 19, 1994
    Assignees: Toyo Roki Seizo Kabushikikaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideo Watanabe, Masatoshi Udagawa, Naritoshi Muramatsu, Hideki Hoshino, Kazumi Yamazaki, Hideo Moriwaki, Atsushi Suzuki, Tsutomu Mori, Takenori Suzuki
  • Abnormality detection system for evaporative fuel control systems of internal combustion engines
    Patent number: 5251592
    Abstract: An abnormality detection system is provided, which detects abnormality in an evaporative fuel control system for an internal combustion engine. A plurality of temperature sensors are arranged in an evaporative fuel storage device at different locations for detecting the temperature of an adsorbent or in the vicinity thereof within the storage device at the different locations. An ECU controls at least one of charging of evaporative fuel from the fuel tank to the storage device and purging of evaporative fuel from the storage device to the intake system of the engine. The ECU determines the presence or absence of an abnormality in the evaporative fuel control system, based upon output values from the temperature sensors assumed when the control system is operative. A state in which adsorption of evaporative fuel generated in the fuel tank to the adsorbent of the storage device has been completed is detected, based upon the amount of a rise in temperature detected while the charging is being effected.
    Type: Grant
    Filed: February 4, 1992
    Date of Patent: October 12, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yasunari Seki, Shigetaka Kuroda, Kazutomo Sawamura, Masatoshi Udagawa, Youichi Iwata, Takushi Toda
  • Canister for storing fuel
    Patent number: 5170765
    Abstract: A fuel storage canister includes a fuel storage chamber defined in a housing and connected to a fuel tank, a first activated carbon layer disposed in said housing for adsorbing fuel vapor, a first passageway connected to said housing for venting said fuel storage chamber through said first activated carbon layer to the atmosphere, a second activated carbon layer disposed in said housing for adsorbing fuel vapor, and a second passageway connected to said housing for venting said fuel storage chamber through said first and second activated carbon layers to the atmosphere. A directional control valve is connected to said first and second passageways for selectively opening said first and second passageways depending on an operating condition of the engine.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: December 15, 1992
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Hideki Hoshino, Masatoshi Udagawa, Hideo Watanabe, Koichi Hidano