Patent ID: 11867111
Assignee: CUMMINS EMISSION SOLUTIONS INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  G  Y | IPC B  F  G

Claim 16:
17. A method comprising:
determining, by a controller associated with an aftertreatment system, a temperature of exhaust gas;
comparing, by the controller, the temperature of the exhaust gas with a predetermined temperature threshold;
when the temperature of the exhaust gas is equal to or less than the predetermined temperature threshold, adjusting a selector valve to a first position so as to divert at least a portion of the exhaust gas to a first exhaust gas path, and heating the exhaust gas in the first exhaust gas path, wherein a first decomposition chamber of the first exhaust gas path is configured to receive the exhaust gas that has been diverted to the first exhaust gas path by the selector valve and heated by the heater, and wherein a first selective catalytic reduction catalyst of the first exhaust gas path is configured to receive the reductant and the heated exhaust gas from the first decomposition chamber; and
when the temperature of the exhaust gas is greater than the predetermined temperature threshold, adjusting the selector valve to a second position so as to divert at least a portion of the exhaust gas to a second exhaust gas path, wherein a second decomposition chamber of the second exhaust gas path is configured to receive the exhaust gas that has been diverted to the second exhaust gas path by the selector valve, and wherein a second selective catalytic reduction catalyst of the second exhaust gas path is configured to receive the reductant and the exhaust gas from the second decomposition chamber.