DEVICE WITH INTERNAL COMBUSTION ENGINE OPERATING ON LEAN MIXTURE AND EXHAUST SYSTEM Russian patent published in 2012 - IPC F01N3/08 F01N3/20 B01D53/94 

FIELD: engines and pumps.

SUBSTANCE: invention refers to device containing exhaust system including catalyst-adsorbent NOx (NAC) and catalytic soot filter (CSF). Essence of invention: device contains: (i) internal combustion engine operating on lean mixture; (ii) exhaust system for treatment of exhaust gas from engine, at that the system includes: (a) the first monolithic basis containing catalyst-adsorbent for NOx (NAC); (b) catalytic soot filter (CSF) including filter basis; and means for enrichment of exhaust gas with periodic obtainment of enriched composition of exhaust gas during normal functioning of engine with lean mixture to remove sulphate adsorbed by catalyst-adsorbent NOx, at that exhaust system includes: (c) chemical compound located downstream of at least some part of catalyst-adsorbent NOx, which is effective for removal and/or converting of at least some part of hydrogen sulphide containing in enriched exhaust gas obtained from removed sulphate adsorbed by catalyst-adsorbent NOx. Also transport device containing device and method of desulfation of catalyst-adsorbent NOx (NAC) in exhaust system.

EFFECT: reducing ejection of H₂S, desulfation of NAC under conditions of enriched mixture.

32 cl, 3 dwg