Patents by Inventor Masayoshi Yamanaka

Masayoshi Yamanaka 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).

  • Tank internal pressure-detecting device for internal combustion engines
    Patent number: 5267547
    Abstract: A tank internal pressure-detecting device for an internal combustion engine having an evaporative emission control system for controlling purging of evaporative fuel generated in a fuel tank thereof into an intake system thereof. An ECU interrupts purging of evaporative fuel by the evaporative emission control system for a predetermined period of time after the engine is started. The ECU causes control valves of the evaporative emission control system to open the interior of the fuel tank to the atmosphere, and stores a value of pressure within the fuel tank detected by a tank internal pressure sensor as a reference value while the purging is being interrupted and at the same time the interior of the fuel tank is opened to the atmosphere. The ECU corrects an output value of the tank internal pressure sensor, based upon the reference value stored.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: December 7, 1993
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Masataka Chikamatsu, Masayoshi Yamanaka, Hiroshi Maruyama, Shigetaka Kuroda, Kazutomo Sawamura