FIELD: engine building.
SUBSTANCE: systems and methods according to the invention, related to a system for spent gas purification, containing: (a) a first injector for injecting ammonia or a compound decomposable into ammonia into spent gas; (b) a particulate filter of the diesel engine, containing an inlet end and an outlet end, wherein said filter comprises a catalytic selective catalytic reduction (SCR) converter and an catalytic oxidation converter; (c) a second injector for injecting ammonia or a compound decomposable into ammonia into spent gas downstream from the filter; and (d) a downstream catalytic converter containing a catalytic selective catalytic reduction converter located downstream from the second injector.
EFFECT: ensured purification of spent gas.
14 cl, 1 tbl, 1 dwg
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