Reductant injection system
AssigneeLiebherr-Components Colmar SAS
InventorsSalvatore Collura, Martin Amann
Life of this patent
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Abstract
The present disclosure provides a reductant injection system for an SCR catalyst of an internal combustion engine, the reductant injection system comprising at least one injector, a first storage container for storing liquid reductant and a pump for pumping reductant from the first storage container to the injector for injection into an exhaust gas stream, wherein the injector is cooled by reductant. The reductant injection system may comprise a second storage container for storing liquid reductant and is configured such that the injector can be cooled by reductant from the second storage container.
Claims20
A reductant injection system for an SCR catalyst of an internal combustion engine, the reductant injection system comprising:
- at least one injector;
- a first storage container for storing liquid reductant;
- a pump for pumping reductant from the first storage container to the injector for injection into an exhaust gas stream, wherein the injector is cooled by reductant;
- and
- a second storage container for storing liquid reductant that is configured such that the at least one injector is cooled by reductant from the second storage container,
- wherein the reductant injection system is configured such that the injector is cooled by reductant from the first storage container and by reductant from the second storage container, wherein the reductant injection system comprises a controller having at least an injection mode and a cooling mode, and
- wherein at least one of the following applies:
- in the injection mode, reductant from the first storage container is used both for injection into the exhaust gas stream and for cooling of the injector, and
- in the cooling mode, reductant from the second storage container is used for cooling of the injector.
Dependencies are inferred from the claim text.