×

METHOD OF DIAGNOSING A SLOW EGR SYSTEM IN AN INTERNAL COMBUSTION ENGINE

  • US 20110023845A1
  • Filed: 07/31/2009
  • Published: 02/03/2011
  • Est. Priority Date: 07/31/2009
  • Status: Active Grant
First Claim
Patent Images

1. A method for diagnosing slow EGR response in an internal combustion engine equipped with an electronic controller with memory, comprising:

  • determining an actual EGR gradient;

    determining an expected EGR gradientcomparing the expected EGR gradient to the actual EGR gradientdetermining the expected EGR gradient is greater that the actual EGR gradient and logging a fault in the electronic controller if the expected EGR gradient is greater than the actual EGR gradient by a predetermined amount.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×