Abstract: An exhaust processor having a particulate trap regeneration system is provided. The exhaust processor includes a housing having an inlet for introducing a combustion product containing a contaminate or other particulate matter from an engine and an outlet for exhausting filtered or otherwise treated combustion product from the housing. At least one substrate is situated in the housing from the inlet. The exhaust processor further includes a trap burner for burning particulate matter collected in the substrate. The trap burner is operable to periodically oxidize the trapped particulate matter and thereby regenerate the substrate. The exhaust processor still further includes a bypass system for regulating the flow rate of combustion product introduced into the housing during regeneration of the substrate. The exhaust processor permits combustion product to be introduced into the housing for treatment in the substrate while regeneration of that substrate is actually occurring.