×

COLD-START ENGINE LOADING FOR ACCELERATED WARMING OF EXHAUST AFTERTREATMENT SYSTEM

  • US 20100122523A1
  • Filed: 11/14/2008
  • Published: 05/20/2010
  • Est. Priority Date: 11/14/2008
  • Status: Abandoned Application
First Claim
Patent Images

11. A method for accelerated warming of an exhaust aftertreatment system having a catalytic converter device with a catalyst for the reduction and oxidation of emissions generated by an internal combustion engine in a motorized vehicle, the method comprising:

  • establishing a target minimum catalyst temperature;

    monitoring a current catalyst temperature;

    determining whether the current catalyst temperature is less than the target minimum catalyst temperature;

    calculating a minimum engine load required to increase the current catalyst temperature to the target minimum catalyst temperature;

    calculating a minimum alternator load required to induce the minimum engine load;

    increasing a current engine load to equal the minimum engine load if the current catalyst temperature is less than the target minimum catalyst temperature;

    wherein increasing the current engine load includes activating a reducing agent tank heating device and a reducing agent line heating device, and commanding the reducing agent tank heating device and reducing agent line heating device to generate the minimum alternator load.

View all claims
  • 12 Assignments
Timeline View
Assignment View
    ×
    ×