Fpt Motorenforschung Ag

Reto Schlegel

John Campbell

Harald Fessler

Daniel Assalve

System for preventing the urea crystal formation within the ATS, the exhaust ATS comprising a dosing module having dosage means for producing a spray of urea-based reducing agent defining a spray cone downstream of the dosage means, the device comprising an electric heating element, suitable to be connected to an electrical energy source, arranged in order to operatively fall within the spray cone.

System for preventing the urea crystal formation within an exhaust gas after treatment system

Device for improving the purifying liquid evaporation in an axially symmetric dosing module for an SCR device. The dosing module is able to dose a urea-based reducing agent into a gas exhaust stream generated by a combustion engine. The dosing module comprises a housing developing symmetrically along a development axis; a nozzle for dosing the urea-based reducing agent, arranged along said development axis; and an inlet opening for conveying the gas exhaust stream into the dosing housing, arranged annularly with respect to the nozzle. The device further includes a splitting wall, arranged within the inlet opening for defining at least two separate annular gas stream paths, one annular and coaxial with respect to another, one of them shaped for inducing a different axial speed into a respective gas stream with respect to another.

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Thal, Switzerland

Reto Schlegel