Patent ID: 8201393

Claim:
Exhaust-gas aftertreatment device, comprising: a diaphragm pump, a pressure filter disposed downstream of the diaphragm pump, a metering unit, a control unit for controlling the diaphragm pump, and a pump unit, which comprises the diaphragm pump, the pressure filter and the control unit, the diaphragm pump being adapted to draw a urea/water solution out of a circuit and pump the urea/water solution through the pressure filter to the metering unit, said metering unit comprising an atomizing nozzle for atomizing the urea/water solution into an exhaust-gas stream, wherein: provided between the diaphragm pump and the pressure filter there is a housing part of a pump unit housing within which channels extend for routing the urea/water solution, and a cooling-water channel is provided in the pump unit, the cooling-water channel being connected to a cooling-water circuit of a motor vehicle engine, such that the urea/water solution can be thawed within the pump unit.