Patents by Inventor Jin Y. Yeh

Jin Y. Yeh 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).

  • Motor vehicle air-fuel ratio automatic control device
    Patent number: 5215063
    Abstract: A motor vehicle air-fuel ratio automatic control device comprises an electromagnetic valve electrically connected to the generator of a motor vehicle to control the passageway of an air loop to the fuel pipe of the motor vehicle. Starting the engine of the motor vehicle causes the electromagnetic valve to open the passageway to supply additional air to the fuel pipe so as to increase the proportion of air in the air-fuel ratio. Stopping the engine of the motor vehicle causes the electromagnetic valve to be electrically disconnected so that the passageway is closed whereby the proportion of air in the air-fuel ratio is reduced to enable a subsequent easy starting of the engine.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: June 1, 1993
    Assignee: Haw Mei Engineering Enterprise Co., Ltd.
    Inventor: Jin Y. Yeh