Patent Document ID: 9228467
Application ID: 14022973
Patent Flag: 1

Claim One:
1. A urea injection controller for a motorized system including a selective catalyst reduction filter (SCRF) device comprising: a passive regeneration module configured and disposed to calculate an amount of NOx conversion resulting from an interaction between exhaust gases and soot entrained in the SCRF device; a replenishment mode trigger module configured to set an ammonia replenishment request based on the amount of NOx conversion resulting from the interaction between exhaust gases and soot entrained in the SCRF device calculated by the passive regeneration module; and a replenishment control module configured to selectively activate a urea injector to discharge a particular amount of urea based on the amount of NOx conversion resulting from the interaction between exhaust gases and soot entrained in the SCRF device calculated by the passive regeneration module.