Asynchronous reductant insertion in aftertreatment systems
AssigneeCummins Emission Solutions Inc.
InventorNassim Khaled
Life of this patent
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Abstract
An aftertreatment system comprises a first SCR system, a second SCR system positioned downstream of the SCR system and a reductant storage tank. At least one reductant insertion assembly is fluidly coupled to the reductant storage tank. The at least one reductant insertion assembly is also fluidly coupled to the first SCR system and the SCR system. A controller is communicatively coupled to the reductant insertion assembly. The controller is configured to instruct the reductant insertion assembly to asynchronously insert the reductant into the first SCR system and the second SCR system.
Claims17
An aftertreatment system, comprising:
- a first selective catalytic reduction system;
- a second selective catalytic reduction system positioned downstream of the first selective catalytic reduction system;
- a reductant storage tank;
- at least one reductant insertion assembly fluidly coupled to the reductant storage tank, the at least one reductant insertion assembly fluidly coupled to the first selective catalytic reduction system and the second selective catalytic reduction system;
- and
- a controller communicatively coupled to the reductant insertion assembly, the controller comprising a timing determination module configured to instruct the reductant insertion assembly to insert the reductant into the first selective catalytic reduction system and the second selective catalytic reduction system such that the reductant is inserted into only one of the first selective catalytic reduction system or the second selective catalytic reduction system at any given time.
An aftertreatment system, comprising;
- a first selective catalytic reduction system;
- a second selective catalytic reduction system;
- at least one reductant insertion assembly fluidly coupled to the first selective catalytic reduction system and the second selective catalytic reduction system;
- and
- a control module communicatively coupled to the at least one reductant insertion assembly, the control module comprising:
- a controller configured to:
- instruct the reductant insertion assembly to insert the reductant into the first selective catalytic reduction system and the second selective catalytic reduction system such that the reductant is inserted into only one of the first selective catalytic reduction system or the second selective catalytic reduction system at any given time.
Dependencies are inferred from the claim text.