Patent ID: 8429899

Claim:
A regeneration system comprising: a particulate matter (PM) filter loading module that determines a current soot loading level of a PM filter; a PM filter temperature module that determines a temperature of the PM filter; an exhaust flow rate module that determines an exhaust flow rate of the PM filter; and a control module that regenerates the PM filter and activates an air pump of an air pump circuit based on the current soot loading, the temperature and the exhaust flow rate; pauses regeneration of the PM filter, deactivates the air pump, and operates an engine within a predetermined range of stoichiometry based on the current soot loading and the temperature, and in response to the exhaust flow rate being less than a predetermined flow rate; and reactivates the air pump and operates the engine in a rich mode in response to the exhaust flow rate being greater than or equal to the predetermined flow rate to complete the regeneration of the PM filter.