Patents by Inventor James Wah Yip

James Wah Yip 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).

  • Feedback load control for power steering
    Patent number: 6164265
    Abstract: A method for controlling the idle of an engine includes the step of determining a proportional airflow term by monitoring the difference between an engine idle speed and a target idle speed. In addition, an integral airflow term is determined. The method further includes the steps of determining a derivative airflow term by monitoring a rate of change of the engine idle speed and defining a limited derivative airflow term bounded by an upper limit and a lower limit. A total proportional, integral, derivative airflow is determined by summing the proportional airflow term, the integral airflow term and the limited derivative airflow term. The total airflow is then delivered to an engine control system.
    Type: Grant
    Filed: August 17, 1999
    Date of Patent: December 26, 2000
    Assignee: DaimlerChrysler Corporation
    Inventors: James Wah Yip, Daniel B. Diebel, Michael J. Prucka