Patents by Inventor Donald J. Harrod

Donald J. Harrod 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).

  • Vehicle engine with turbine bypass for exhaust treatment device warm-up
    Patent number: 4244187
    Abstract: In a preferred embodiment applied to an automotive vehicle engine with an exhaust turbocharger and an exhaust treatment device operative at elevated temperature and located after the turbine in the exhaust system, warm-up of the treatment device is speeded by a bypass system and valve that cuts off exhaust gas flow through the turbine and supplies the engine exhaust directly to the treatment device until its operating temperature is reached, after which the bypass is closed and normal flow through the turbine is provided. Additional features are also described.
    Type: Grant
    Filed: March 30, 1979
    Date of Patent: January 13, 1981
    Inventors: Jeff K. Lane, Joseph M. Negri, Donald J. Harrod