CPC F01N 3/2033 (2013.01) [B01D 39/12 (2013.01); B01D 46/2403 (2013.01); B01D 46/521 (2013.01); B01D 53/945 (2013.01); B01D 53/9418 (2013.01); B01D 53/9477 (2013.01); B01J 23/42 (2013.01); B01J 35/04 (2013.01); F01N 3/101 (2013.01); F01N 3/2066 (2013.01); F01N 3/2828 (2013.01); F01N 3/2842 (2013.01); F01N 3/36 (2013.01); B01D 2239/1208 (2013.01); B01D 2255/102 (2013.01); B01D 2255/908 (2013.01); B01D 2255/9155 (2013.01); B01D 2279/30 (2013.01); F01N 3/025 (2013.01); F01N 3/0253 (2013.01); F01N 3/0256 (2013.01); F01N 3/204 (2013.01); F01N 2240/14 (2013.01); F01N 2370/02 (2013.01); F01N 2610/03 (2013.01); F01N 2610/08 (2013.01); F01N 2610/1453 (2013.01); F01N 2900/1404 (2013.01); F01N 2900/16 (2013.01); F01N 2900/1824 (2013.01)] | 20 Claims |
1. An exhaust system for a vehicle, comprising:
an exhaust pipe section defining a main exhaust passageway therein;
a selective catalytic reduction (SCR) catalyst arranged in fluid communication with and positioned downstream of the exhaust pipe section; and
a burner assembly connected to the exhaust pipe section, the burner assembly including a burner with a combustion chamber disposed therein, an igniter for initiating fuel combustion in the combustion chamber, and a connecting tube extending between an outlet of the combustion chamber and the exhaust pipe section,
wherein the connecting tube includes an inner surface defining a connecting tube passageway that is arranged in fluid communication with the combustion chamber of the burner and the main exhaust passageway in the exhaust pipe section,
wherein a catalytic washcoat is disposed on the inner surface of the connecting tube, the catalytic washcoat comprising a mixture of a support material and a catalyst material made of one or more platinum group metals (PGM) that chemically react with emissions generated by the burner.
|