Mixer housing arrangement for a combustion engine

The mixing housing assembly for an internal combustion motor, with an air intake channel section (3) containing an exhaust gas return (5), is composed of a housing section (8) with corresponding seals (9,10). The cut-outs (11-14) in the seals match the flow cross sections of the entry and exit openings. The housing (2) is a casting. A throttle flap (4) is upstream of the exhaust gas return, to control the air flow throughput.