ICE WASTE-GAS PURIFICATION DEVICE Russian patent published in 2010 - IPC F01N3/20 

FIELD: engines and pumps.

SUBSTANCE: exhaust duct of ICE accommodates front and rear catalytic neutralisers arranged along the waste gas flow. Front and rear neutralisers comprise catalyst to accumulate NO_x contained in waste gas at depleted composition of work mix of incoming exhaust gas and to release accumulated NO_x at enriched or stoichiometric composition of work mix of incoming exhaust gas. To kill SO_x in front neutraliser, its temperature is increased to of SO_x release and composition of exhaust gas work mix coming in said front neutraliser is enriched. To kill SO_x in rear neutraliser, its temperature is increased to of SO_x release and composition of exhaust gas work mix coming in said rear neutralizer is depleted. Note here that frequency of killing SO_x in rear neutraliser exceeds that in front neutraliser.

EFFECT: possibility to efficiently recover absorbing capacity of SO_x killer.

7 cl, 6 dwg