Injector nozzle for injecting urea water solution into exhaust gas stream of diesel engine of motor car for catalytic reduction of nitrogen oxide emission, has enclosure body comprising annular gap into which agent and air are dispensed

摘要

The nozzle (10) has an enclosure body (12) accommodated in a housing (14) and comprising a circumferential annular gap (16) that opens into a nozzle orifice (18). A reducing agent and air are dispensed into the annular gap through throttles (34, 36) and air nozzles (30, 32), respectively. The annular gap is formed in cone-shape and tapers to the nozzle orifice that is surrounded by a ring bulge (24). A recess (40) is formed in housing for accommodating a cylindrical projection of the body. The body is made of a hydrophobic thermoplastic and/or duroplastic material i.e. PTFE.