Control system for a combustion engine

Regulating installation (10) with a first and second (12) turbo unit in the exhaust gas elbow (13) of the engine and control device operationally linked to them. The first turbo unit is situated above the exhaust gas elbow and the second turbo unit underneath the elbow. In the area between the outlet for the first upper turbo unit and the inlet (15) of the second lower turbo unit is a connecting area integrated within the exhaust gas elbow. In the passage from the connecting area to the second turbo unit a control device (14) is fitted with control shutter (17).