Device to generate reducing agent/air mixture for IC engines has pump with pump housing connected to mixing chamber body, which forms cover for pump housing

摘要

The pump housing (22,32) has a mixing chamber (50) formed in a mixing room body (36). The body is connected to the pump housing, and forms a cover for the housing. The pump (16) has a drive shaft (24) for a feed element (30). The shaft projects into the pump housing and the mixing room body is positioned radial relative to the shaft. The body has a connection (38) for a reduction agent, and a return valve (40) is located between the connection and the pump working chamber (34), and opens into that chamber.