Patent ID: 11885251
Assignee: TENNECO AUTOMOTIVE OPERATING COMPANY INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 12:
13. 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;
a burner assembly positioned in a side branch 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, the connecting tube including a connecting tube passageway having an inlet that is arranged in fluid communication with the combustion chamber of the burner and an outlet in fluid communication with the main exhaust passageway in the exhaust pipe section; and
a filter element positioned in the connecting tube passageway that is made of a metallic mesh and has a porosity that permits burner generate exhaust to flow through the filter element while trapping particulate matter generated by the burner,
wherein a catalytic washcoat at least partially coats the metallic mesh of the filter element, 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.