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US 2012/0073264 A1Published application
Reductant dosing system
AssigneeCaterpillar Inc.
InventorsYongxiang LI, Jinhui Sun
Life of this patent
Estimating the term…
Abstract
A reductant dosing system for an engine is disclosed. The reductant dosing system may have a supply of reductant, a reservoir configured to hold pressurized reductant, and a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir. The reductant dosing system may also have a plurality of injectors fluidly connected to the reservoir, and a drain valve fluidly connected between the reservoir and the supply.
Claims20
A reductant dosing system, comprising:
- a supply of reductant;
- a reservoir configured to hold pressurized reductant;
- a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir;
- a plurality of injectors fluidly connected to the reservoir;
- and
- a drain valve fluidly connected between the reservoir and the supply.
3 more elements
A reductant dosing system, comprising:
- a supply of reductant;
- a reservoir configured to hold pressurized reductant;
- a pump configured to draw reductant from the supply and discharge reductant at an elevated pressure into the reservoir;
- a plurality of injectors fluidly connected to the reservoir;
- and
- a controller in communication with the plurality of injectors and being configured to activate the injectors to inject pressurized reductant when a pressure of reductant within the reservoir is a desired pressure.
3 more elements
A method of dosing reductant, comprising:
- drawing reductant from a low-pressure supply;
- pressurizing reductant;
- storing pressurized reductant;
- simultaneously injecting stored reductant at a plurality of locations;
- and
- selectively draining stored reductant in response to one of a reductant pressure, a reductant temperature, and an engine operational status.
3 more elements
Dependencies are inferred from the claim text.