Exhaust gas aftertreatment device for an internal combustion engine
AssigneeVolvo Car Corporation
InventorsMarie Stenfeldt, Peter Sandberg, Rakshith Ramachandra
Life of this patent
Estimating the term…
Abstract
The invention relates to an exhaust gas aftertreatment device for an internal combustion engine, where the device comprises: an exhaust duct allowing a through-flow of exhaust gas; a catalytic NOx converter arranged in the exhaust duct; and a fluid inlet arranged to introduce a liquid reductant into or onto a structure in the exhaust duct upstream the catalytic NOx converter. The invention is characterized in that the structure is a sorption structure having pores configured to retain the liquid reductant in liquid form until it evaporates. The invention also relates to a vehicle provided with such a device.
Claims12
An exhaust gas aftertreatment device for an internal combustion engine, comprising:
- an exhaust duct allowing a through-flow of exhaust gas;
- a catalytic NOx converter arranged in the exhaust duct;
- a fluid inlet arranged to introduce a liquid reductant into or onto a structure in the exhaust duct upstream of the catalytic NOx converter;
- wherein the structure is a sorption structure having pores configured to retain the liquid reductant in liquid form until it evaporates,
- wherein the sorption structure comprises a macro-porous structure having pores with a diameter or a width of between 50 nm and 100 μm, and
- wherein the macro-porous structure has a pore opening surface density of at least 10 pore openings per mm2.
Dependencies are inferred from the claim text.