Patents by Inventor Jamie Stringfield

Jamie Stringfield 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).

  • Engine system having particulate reduction device and method
    Patent number: 8082730
    Abstract: An internal combustion engine system includes an engine having an engine housing. The engine system further includes an exhaust system, and a turbine disposed within the exhaust system. A particulate reduction device is disposed in the exhaust system upstream of the turbine. The particulate reduction device includes an exhaust retarder having a flow property which is based at least in part on a residence requirement for combustion of particulates in exhaust gases passing therethrough. The flow property may be a flow restriction property, and the exhaust retarder may include a flow restricting trapping element configured to trap particulates in the exhaust gases. The flow restricting trapping element defines a combustion efficacy to exhaust mass flow and temperature coefficient for the particulate reduction device which is based at least in part on a combustion initiating residence requirement for particulates passing through the particulate reduction device.
    Type: Grant
    Filed: May 20, 2008
    Date of Patent: December 27, 2011
    Assignee: Caterpillar Inc.
    Inventors: Nan Yang, Jeff A. Jensen, Michael Pollard, Jamie Stringfield, Herbert DaCosta
  • Engine system having particulate reduction device and method
    Publication number: 20090288392
    Abstract: An internal combustion engine system includes an engine having an engine housing. The engine system further includes an exhaust system, and a turbine disposed within the exhaust system. A particulate reduction device is disposed in the exhaust system upstream of the turbine. The particulate reduction device includes an exhaust retarder having a flow property which is based at least in part on a residence requirement for combustion of particulates in exhaust gases passing therethrough. The flow property may be a flow restriction property, and the exhaust retarder may include a flow restricting trapping element configured to trap particulates in the exhaust gases. The flow restricting trapping element defines a combustion efficacy to exhaust mass flow and temperature coefficient for the particulate reduction device which is based at least in part on a combustion initiating residence requirement for particulates passing through the particulate reduction device.
    Type: Application
    Filed: May 20, 2008
    Publication date: November 26, 2009
    Inventors: Nan Yang, Jeff A. Jensen, Michael Pollard, Jamie Stringfield, Herbert Dacosta