Patents by Inventor William B. Orrell

William B. Orrell 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).

  • Fuel injection temperature compensation system
    Patent number: 4886027
    Abstract: A method for calculating actual air charge temperature uses values of coolant temperature, ambient temperature and engine air flow. These parameters affect the intake manifold temperature which, in turn, affects the amount of heat that is transferred to the air from the manifold. The time constant associated with the manifold temperature keeps the actual air charge temperature from instantaneously achieving a steady state condition. A time constant in the actual air charge temperature calculation substantially tracks the time constant associated with the change in temperature of the manifold as it responds to changes in air flow conditions. This actual air charge temperture value can then be used to calculate an accurate air-fuel ratio.
    Type: Grant
    Filed: July 29, 1988
    Date of Patent: December 12, 1989
    Assignee: General Motors Corporation
    Inventors: William B. Orrell, Wendell D. Creps
  • System for predicting catalytic converter temperature
    Patent number: 4656829
    Abstract: A system and method of predicting the temperature of the bed of a catalytic converter positioned in the exhaust system of an internal combustion engine.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: April 14, 1987
    Assignee: General Motors Corporation
    Inventors: Wendell D. Creps, William B. Orrell