METHOD AND APPARATUS FOR REGENERATING A NOx TRAP AND A PARTICULATE TRAP

摘要

An apparatus (10) comprises an emission abatement device and a ratio oscillator (18). The emission abatement device comprises a NOx trap (12) and a particulate trap (14). The ratio oscillator (18) is configured to oscillate a ratio of the oxygen content and regenerative agent content of a flow advanced to the emission abatement device so as to alternately partially regenerate the NOx trap (12) and the particulate trap (14) for a plurality of cycles. An associated method is disclosed.