A multi-cylinder internal combustion engine with two exhaust gas turbochargers of which one is adapted to be switched-in during the operation of the internal combustion engine by way of a switch-in valve controllable on the turbine side and by way of a check valve on the compressor side. Furthermore,...http://www.google.com/patents/US4781027?utm_source=gb-gplus-sharePatent US4781027 - Multi-cylinder internal combustion engine with two exhaust gas turbochargers
