Patents by Inventor Laurence Hatfield

Laurence Hatfield 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).

  • Exhaust-gas recirculation system and method for exhaust-gas recirculation
    Patent number: 9181862
    Abstract: The present disclosure provides systems and methods for adjusting an exhaust gas recirculation rate to provide accurate air-fuel ratio. The disclosure provides a method for calculating an exhaust-gas recirculation rate based on a measured exhaust-gas lambda and a turbocharger speed. Through the use of the exhaust-gas lambda and the turbocharger speed it is possible to calculate an exhaust-gas recirculation rate while dispensing with the difficult and unreliable determination of the mass air flow for determining an exhaust-gas recirculation rate, thus providing a stable method which further reduces fuel consumption and emissions.
    Type: Grant
    Filed: March 21, 2013
    Date of Patent: November 10, 2015
    Assignee: Ford Global Technologies, LLC
    Inventors: Simon Petrovic, Laurence Hatfield, Christian Winge Vigild, Jon Dixon
  • EXHAUST-GAS RECIRCULATION SYSTEM AND METHOD FOR EXHAUST-GAS RECIRCULATION
    Publication number: 20130247567
    Abstract: The present disclosure provides systems and methods for adjusting an exhaust gas recirculation rate to provide accurate air-fuel ratio. The disclosure provides a method for calculating an exhaust-gas recirculation rate based on a measured exhaust-gas lambda and a turbocharger speed. Through the use of the exhaust-gas lambda and the turbocharger speed it is possible to calculate an exhaust-gas recirculation rate while dispensing with the difficult and unreliable determination of the mass air flow for determining an exhaust-gas recirculation rate, thus providing a stable method which further reduces fuel consumption and emissions.
    Type: Application
    Filed: March 21, 2013
    Publication date: September 26, 2013
    Applicant: Ford Global Technologies, LLC
    Inventors: Simon Petrovic, Laurence Hatfield, Christian Winge Vigild, Jon Dixon