Patents Represented by Attorney, Agent or Law Firm Tom L. Derry
  • Method and apparatus for preheating of combustion air for an internal combustion engine
    Patent number: 6536419
    Abstract: This invention provides a method and apparatus for preheating combustion (intake) air of an internal combustion engine during extreme cold ambient temperatures. A valve arrangement is provided to alter the flow of coolant through a radiator and aftercooler. During conditions where intake air temperature is below a predetermined temperature a fluid control valve causes coolant to first flow through a jacket water portion of the engine and next through the aftercooler where the intake air is preheated.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: March 25, 2003
    Assignee: Caterpillar Inc
    Inventor: Robert D. Roley