Patents by Inventor John Roy McGrath

John Roy McGrath 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).

  • Internal combustion engines and control
    Patent number: 6854440
    Abstract: Disclosed is an internal combustion engine comprising at least one cylinder with a reciprocating piston to provide said engine with at least one combustion chamber, said combustion chamber further comprising a delivery injector for injecting fuel directly into said combustion chamber, said engine further comprising at least one valved inlet air duct for delivering combustion air into said combustion chamber, wherein at least said inlet air duct and/or its valve is arranged to provide a low tumble inlet port to said at least one combustion chamber, said combustion chamber, in use, having low in-cylinder tumble gas motion of said combustion air and wherein said low in-cylinder tumble gas motion of said combustion air reduces over-enleanment of fuel in end gas regions of said combustion chamber.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: February 15, 2005
    Assignee: Orbital Engine Company (Australia) Pty Limited
    Inventors: Geoffrey Paul Cathcart, Christian Chandrakumar Zavier, Donald Andrew Railton, John Roy McGrath
  • Internal combustion engines and control
    Publication number: 20030140891
    Abstract: Disclosed is an Internal combustion engine comprising at least one cylinder with a reciprocating piston to provide said engine with at least one combustion chamber, said combustion chamber further comprising a delivery injector for injecting fuel directly into said combustion chamber, said engine further comprising at least one valved inlet air duct for delivering combustion air into said combustion chamber, wherein at least said inlet air duct and/or its valve is arranged to provide a low tumble inlet port to said at least one combustion chamber, said combustion chamber, in use, having low in-cylinder tumble gas motion of said combustion air and wherein said low in-cylinder tumble gas motion of said combustion air reduces over-enleanment of fuel in end gas regions of said combustion chamber.
    Type: Application
    Filed: November 26, 2002
    Publication date: July 31, 2003
    Inventors: Geoffrey Paul Cathcart, Christian Chandrakumar Zavier, Donald Andrew Railton, John Roy McGrath