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US 9,387,437 B2Granted
Reductant supply system
AssigneeCaterpillar Inc.
InventorsKeith D. Hogan, Thomas R. Fenelon, Brian M. Cole, Kevin L. Dea
Life of this patent
Estimating the term…
Abstract
A reductant supply system includes a reductant tank, an injector supply conduit fluidly connecting the reductant tank with an injector, a driving fluid source in fluid communication with the reductant tank via a dose driving conduit, a purge conduit in fluid communication with the driving fluid source and the reductant tank, and a valve in fluid communication with the reductant tank via the dose driving conduit and the purge conduit.
Claims19
A reductant supply system comprising:
- a reductant tank;
- an injector supply conduit fluidly connecting the reductant tank with an injector;
- a driving fluid source in fluid communication with the reductant tank via a dose driving conduit;
- a purge conduit in fluid communication with the driving fluid source and the reductant tank;
- a venturi disposed in the purge conduit;
- and
- a valve in fluid communication with the reductant tank via the dose driving conduit and the purge conduit, wherein:
- a first configuration of the valve affects fluid communication between the driving fluid source and the injector supply conduit through the dose driving conduit and blocks fluid communication between the driving fluid source and the injector supply conduit through the purge conduit, and
- a second configuration of the valve affects fluid communication between the driving fluid source and the injector supply conduit through the purge conduit and blocks fluid communication between the driving fluid source and the injector supply conduit through the dose driving conduit.
6 more elements
A reductant supply system comprising:
- a reductant tank;
- an injector supply conduit fluidly connecting the reductant tank with an injector;
- a driving fluid source in fluid communication with the reductant tank via a dose driving conduit;
- a purge conduit in fluid communication with the driving fluid source and the injector supply conduit;
- a venturi disposed in the purge conduit;
- and
- a valve in fluid communication with the reductant tank via the dose driving conduit and the injector supply conduit via the purge conduit, wherein:
- a first configuration of the valve affects fluid communication between the driving fluid source and the injector supply conduit through the dose driving conduit and blocks fluid communication between the driving fluid source and the injector supply conduit through the purge conduit;
- and
- a second configuration of the valve affects fluid communication between the driving fluid source and the injector supply conduit through the purge conduit and blocks fluid communication between the driving fluid source and the injector supply conduit through the dose driving conduit.
7 more elements
A reductant supply system comprising:
- a reductant tank;
- an injector supply conduit fluidly connecting the reductant tank with an injector;
- a driving fluid source;
- and
- a valve arrangement in fluid communication with the driving fluid source and the reductant tank, the valve arrangement including a first valve, a second valve, and a third valve, wherein the valve arrangement is configured to selectively and alternatively:
- deliver a driving fluid from the driving fluid source to the reductant tank via the first valve;
- and
- purge the injector supply conduit with the driving fluid via the second valve,
- wherein the third valve is in fluid communication with the first valve and the second valve, the third valve positioned downstream of the first valve and the second valve, such that the third valve is configured to control a flow of the driving fluid from the first valve toward the second valve during the delivery.
6 more elements
Dependencies are inferred from the claim text.