FIELD: chemistry.
SUBSTANCE: invention relates to elimination of NOx and non-methane hydrocarbons from diesel engine exhaust gases. A motor vehicle engine system, comprising a first diesel-type oxidation catalyst (DOC) configured to receive exhaust gases from the engine and a selective catalytic reduction (SCR) device installed downstream of the first DOC in the direction of flow of exhaust gases. The system also includes a second DOC installed downstream of the SCR device and configured to oxidise hydrocarbons. The system employs sorption of hydrocarbons on a SCR catalyst, which depends on temperature. The system can also include a nozzle installed downstream of the first DOC in the direction of flow of exhaust gases. The system can also include a particulate filter placed downstream of the second DOC and configured to remove soot from exhaust gases.
EFFECT: reducing emissions of non-methane hydrocarbons when releasing engine exhaust gases.
10 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| OXIDATION CATALYST FOR A COMPRESSION-IGNITION ENGINE | 2014 |
|
RU2721563C2 |
| OXIDATION CATALYST FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT | 2012 |
|
RU2623218C1 |
| OXIDATION CATALYST FOR INTERNAL COMBUSTION ENGINE EXHAUST GAS TREATMENT | 2012 |
|
RU2570197C1 |
| OXIDATION CATALYST FOR INTERNAL COMBUSTION ENGINE OPERATING ON LEAN MIXTURE | 2011 |
|
RU2577856C2 |
| CATALYZED BLOCK CARRIER | 2012 |
|
RU2618058C2 |
| COMBINED CATALYST FOR REMOVAL OF PERCOLATED AMMONIA AND CATALYST FOR EXOTHERMIC OXIDATION OF HYDROCARBONS | 2011 |
|
RU2583374C2 |
| SOLID SUBSTRATE WITH SCR CATALYST | 2012 |
|
RU2608998C2 |
| EXHAUST SYSTEM FOR IC ENGINE RUNNING ON LEAN MIXTURE CONTAINING PGM COMPONENT AND SCR CATALYST | 2012 |
|
RU2620474C2 |
| ON-BOARD DIAGNOSTICS SYSTEM FOR CATALYSED SUBSTRATE | 2014 |
|
RU2672013C2 |
| OXIDATION CATALYST FOR TREATMENT OF EXHAUST GAS OF ENGINE WITH COMPRESSION IGNITION | 2013 |
|
RU2668272C2 |
