METHOD OF OPERATING A COMBUSTION ENGINE PROVIDED WITH A DISCONNECTABLE CHARGING PUMP, AND DEVICE FOR CARRYING OUT THE SAME

摘要

A process for operating an internal-combustion engine with a supercharger which can be cut out, and a device for carrying out the process are disclosed. The engine has, aside from the supercharger or compressor which can be cut in or out as desired, an exhaust-gas return arrangement. No exhaust gas can be conveyed back into the intake line when the compressor is cut in and therefore when there is a pressure rise at the cylinder inlet to above atmospheric pressure and above the pressure prevailing in an exhaust-gas line. The return of exhaust gas into the intake line is prevented in such a way that an exhaust-gas return line opens, opposite a supercharger delivery line from the supercharger, into an intake line to the engine. A shut-off member is arranged at this junction so that during suction operation of the engine the shut-off member closes the supercharger delivery line and during supercharging operation the shut-off member closes the intake line, above the supercharger delivery line, and the exhaust-gas return line.