METHOD AND DEVICE FOR OPERATION OF EXHAUST GAS NEUTRALIZATION SYSTEM Russian patent published in 2020 - IPC F01N3/35 F01N3/20 F01N13/00 

FIELD: engine building.

SUBSTANCE: invention relates to operation of internal combustion engine exhaust gases neutralization system, in particular, diesel engine, wherein in exhaust path (7) at least one soot SCR filter (15) is provided, wherein in the particulate SCR filter (15) particles contained in exhaust gas (9) of the internal combustion engine (5), in particular, carbon particles are removed from exhaust gas (9) and can accumulate, wherein in the soot SCR filter (15), the nitrogen oxides contained in exhaust gas (9) of the internal combustion engine (5) can be reduced with ammonia as a reducing agent, wherein a first reducing agent supply device (22) is provided, which can introduce a reducing agent, in particular in the form of an aqueous urea solution, into exhaust path (7) above, if viewed in exhaust gas flow direction, particulate SCR filter (15), wherein soot SCR filter (15) can be continuously regenerated with nitrogen dioxide as oxidant, beyond soot SCR-filter (15) is at least one SCR-catalyst (19), on which nitrogen oxides also contained in exhaust gas (9) of internal combustion engine (5), can be reduced with ammonia as reducing agent, and wherein second device (26) for supplying a reducing agent, which can introduce a reducing agent into exhaust path (7), in particular in the form of an aqueous solution of urea, behind the soot SCR filter (15) and to SCR-catalyst (19) is provided. According to the invention, control unit (25) is provided, which controls and/or controls the amount of reducing agent, introduced into exhaust path (7) by first device (22) for supply of reducing agent and/or second device (26) for supply of reducing agent, depending on temperature (T_SCR-PF) of soot SCR-filter (15).

EFFECT: invention discloses a method and an apparatus for operating an exhaust gas neutralization system.

14 cl, 4 dwg