Patent ID: 9103257
Filing Date: 2015-08-11
Classification: F01N,F02D,Y02A,Y02T

Abstract:
1. A method of determining and performing a diesel oxidation catalyst (DOC) regeneration cycle of a vehicle, the method comprising: applying a rich fuel-air mixture to a DOC to control a concentration of a fuel-air mixture; measuring a temperature of a front end of the DOC when the concentration of the fuel-air mixture becomes lean; calculating a thermal load value based on the temperature measured in the measuring step with respect to the time elapsed from when the fuel-air mixture becomes lean; accumulating the calculated thermal load values from every iteration of the measuring and calculating steps performed from when the air-fuel mixture becomes lean; comparing the accumulated thermal load value with a predetermined critical value to determine whether the accumulated thermal load value exceeds the predetermined critical value; repeatedly performing the measuring, calculating and accumulating steps step when the accumulated thermal load value is equal to or less than the predetermined critical value; and repeatedly performing all of the steps beginning with the applying step when the accumulated thermal load value exceeds the predetermined critical value.