Patents by Inventor Marcel R. Wancket

Marcel R. Wancket 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).

  • Patent number: 4958609
    Abstract: A method and apparatus for improving the output torque response of a crankase scavenged, two-stroke engine to a change in throttle position by adjusting the conventional timing of cylinder fuel injection as a function of the position of the throttle and the time rate of change in the throttle position. Preferably, throttle position is measured with a potentiometer connected to the engine air intake throttle, and then filtered with a filter having a first order lag characteristic. Injection timing is advanced based upon a first predetermined schedule as a function of the measured throttle position. The difference between the measured and filtered throttle positions represents an indication of the time rate of change of throttle position and is employed to advance or retard timing in accordance with the second predetermined schedule, depending upon whether the difference is positive or negative, respectively.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: September 25, 1990
    Assignee: General Motors Corporation
    Inventors: Douglas E. Trombley, Kenneth J. Buslepp, Cathy C. Lillie, Marcel R. Wancket