Valve device for inserting liquid pollutant-reducing substance, particularly aqueous urea solution in exhaust-gas arrangement of exhaust gas aftertreatment device of combustion engine of motor vehicle, has valve chamber with closure body

摘要

The valve device (1) has a valve chamber (4) with a closure body (3). The closure body closes a nozzle opening (2) of the valve chamber in a closing position in liquid-tight manner. A sealing element is partially made of a material resistant against the pollutant-reducing substance. The closure body is directly co-operated with a power device (5). An independent claim is also included for an exhaust gas aftertreatment device with a medium for reducing the nitric oxide and a medium for filtering particles of a motor vehicle.