Patents by Inventor Harry Stuard Pink

Harry Stuard Pink 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).

  • NO.sub.x reductant generation in a compression-ignition engine by hydrocarbon injection during the expansion stroke
    Patent number: 6029623
    Abstract: The invention relates to a method for producing NO.sub.x reductants by injecting hydrocarbon into a diesel engine's combustion chamber during the expansion cycle. The secondary injected hydrocarbon is formed, under appropriate conditions, into oxygenates and olefins that are suitable for reducing NO.sub.x species in the presence of conventional exhaust catalysts. The appropriate injection timing is obtained by referring to a calibration obtained by direct engine measurements.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: February 29, 2000
    Assignee: Exxon Research and Engineering Co.
    Inventors: Walter Weissman, Frank Hershkowitz, Anthony Marion Dean, Harry Stuard Pink
  • NO to NO.sub.2 conversion control in a compression injection engine by hydrocarbon injection during the expansion stroke
    Patent number: 5947080
    Abstract: The invention is directed towards a method for adjusting the NO.sub.2 to NO content of a diesel engine's exhaust without affecting engine performance. The NO.sub.2 to NO ratio is adjusted by varying the amount and tinting of secondary hydrocarbon injection during the engine's expansion stroke. The appropriate amount of secondary injected hydrocarbon and the appropriate injection timing are determined from calibration values obtained by direct engine measurements and the desired NO.sub.2 :NO ratio.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: September 7, 1999
    Assignee: Exxon Research and Engineering Company
    Inventors: Walter Weissman, Anthony Marion Dean, Harry Stuard Pink