Patents by Inventor Toshio Matsubara

Toshio Matsubara 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).

  • Air pollution preventing device for internal combustion engine
    Patent number: 4646702
    Abstract: An air pollution preventing device having a canister for preventing fuel vapor formed in the fuel tank from escaping into the atmosphere is provided with a feedback control detecting circuit which detects whether the feedback control of the air-fuel ratio of intake mixture is effected, a temperature sensor which detects the fuel temperature and a purge control valve control circuit which receives outputs of the feedback control detecting circuit and the temperature sensor and controls the purge control valve so that the purge control valve is opened to permit introduction of the fuel vapor trapped in the canister only when the feedback control is effected when the fuel temperature is lower than a preset value and is opened irrespective of whether or not the feedback control is effected when the fuel temperature is not lower than the preset value.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: March 3, 1987
    Assignee: Mazda Motor Corporation
    Inventors: Toshio Matsubara, Hideki Kakumoto, Kazuyuki Okazaki