Patent ID: 8707686
Filing Date: 2014-04-29
Classification: F01N,Y02T

Abstract:
1. A method of controlling an exhaust gas treatment system of a vehicle, the method comprising: detecting the start of a regeneration event in which accumulated particulate matter is burnt from a particulate filter; monitoring a quantity of fuel used by the vehicle during a defined time period of the regeneration event; estimating a quantity of particulate matter being burnt from the particulate filter during the defined time period of the regeneration event to define a particulate matter burn rate; comparing the quantity of fuel used with the calculated particulate matter burn rate to define a regeneration fuel efficiency ratio; comparing the regeneration fuel efficiency ratio to a minimum regeneration fuel efficiency rate to determine if the regeneration event is an efficient use of fuel or is not an efficient use of fuel; and stopping the regeneration event prior to an estimated completion of the regeneration event when the comparison of the regeneration fuel efficiency ratio to the minimum regeneration fuel efficiency rate indicates that the regeneration event is not an efficient use of fuel.