초록 ▼

A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.

A method of providing an exhaust treatment device is disclosed. The method includes applying a catalyst including gold and a platinum group metal to a particulate filter. The concentration of the gold and the platinum group metal is sufficient to enable oxidation of carbon monoxide and nitric oxide.

대표청구항 ▼

1. A method of providing an exhaust treatment device including applying a catalyst including gold and palladium to a particulate filter, wherein the catalyst contains between about 0.8 and 1.2% Au and between about 0.4 and 0.6% Pd, by weight. 2. The method of claim 1, further including: decreasing a

1. A method of providing an exhaust treatment device including applying a catalyst including gold and palladium to a particulate filter, wherein the catalyst contains between about 0.8 and 1.2% Au and between about 0.4 and 0.6% Pd, by weight. 2. The method of claim 1, further including: decreasing a concentration of carbon monoxide in an exhaust stream flowed over the catalyst by achieving lightoff of the carbon monoxide at a temperature of about 60° C. 3. The method of claim 1, further including: increasing a concentration of nitrogen in an exhaust stream flowed over the catalyst by oxidizing nitrogen oxide to form nitrogen dioxide. 4. The method of claim 1, further including: flowing an exhaust stream over the catalyst to achieve hydrocarbon lightoff in the exhaust stream at a temperature of about 165° C. 5. A method of providing an exhaust treatment device including applying a catalyst including gold and palladium to a particulate filter, wherein applying the catalyst includes applying a catalyst containing between about 0.8 and 1.2% Au and between about 0.4 and 0.6% Pd, by weight, and the balance titania. 6. The method of claim 5, further including: decreasing a concentration of carbon monoxide in an exhaust stream flowed over the catalyst by achieving light off of the carbon monoxide at a temperature of about 60° C. 7. The method of claim 5, further including: increasing a concentration of nitrogen in an exhaust stream flowed over the catalyst by oxidizing nitrogen oxide to form nitrogen dioxide. 8. The method of claim 5, further including: flowing an exhaust stream over the catalyst to achieve hydrocarbon lightoff in the exhaust stream at a temperature of about 165° C. 9. A method of operating an exhaust treatment device, comprising: exposing a flow of exhaust to a gold-platinum group metal catalyst, wherein the catalyst contains between about 0.8 and 1.2% gold and between about 0.4 and 0.6% palladium, by weight; andat least one of decreasing a concentration of carbon monoxide within the exhaust stream, increasing a concentration of nitrogen within the exhaust stream, and oxidizing hydrocarbon within the exhaust stream. 10. The method of claim 9, wherein decreasing the concentration of carbon monoxide includes achieving carbon monoxide lightoff at a temperature of about 60° C. 11. The method of claim 9, wherein increasing the concentration of nitrogen includes oxidizing nitrogen oxide to form nitrogen dioxide. 12. The method of claim 9, wherein oxidizing the hydrocarbon includes achieving hydrocarbon lightoff at a temperature of about 165° C. 13. A method of operating an exhaust treatment device, comprising: exposing a flow of exhaust to a gold-platinum group metal catalyst, wherein the catalyst contains between about 0.8 and 1.2% gold and between about 0.4 and 0.6% palladium, by weight, on a titania support; andat least one of decreasing a concentration of carbon monoxide within the exhaust stream, increasing a concentration of nitrogen within the exhaust stream, and oxidizing hydrocarbon within the exhaust stream. 14. The method of claim 13, wherein decreasing the concentration of carbon monoxide includes achieving carbon monoxide lightoff at a temperature of about 60° C. 15. The method of claim 13, wherein increasing the concentration of nitrogen includes oxidizing nitrogen oxide to form nitrogen dioxide. 16. The method of claim 13, wherein achieve the hydrocarbon includes achieving hydrocarbon lightoff at a temperature of about 165° C.