Patent ID: 6845611

Claim:
A reducing agent dosing device for delivering a reducing agent into an exhaust gas system of an internal combustion engine of a motor vehicle comprising: a reducing agent tank; a dosing valve for the output of a specific quantity of reducing agent having an input side and an output side; a supply line connecting the reducing agent tank with the dosing valve; the output of the dosing valve terminates in a mixing chamber, said mixing chamber being connected to the exhaust gas system; compressed air flowing through the mixing chamber in the direction to the exhaust gas system; said compressed air being provided by the charge air of a turbocharger of the internal combustion engine for mixing the reducing agent output by the dosing valve with an air flow; and wherein the mixing chamber is alternatively supplied with compressed air at a first temperature by a first compressed air line attached to the charge air before a charge-air cooler and compressed air at a second temperature being lower the first temperature by a second compressed air line attached to the charge air after the charge air cooler.