Turbocharged engine with compressed air tank for supplying additional air to the exhaust gas turbine when the requested engine load is high enough

A turbocharger system (1) for a vehicle comprising a turbocharger (2), a tank (3) for compressed gas and an exhaust manifold conduit (4). The tank (3) is in fluid communication with the exhaust manifold conduit (4) and is arranged and controlled to push compressed gas into the exhaust manifold conduit (4) during a predetermined pulse duration time period for initial compressor spin up in the turbocharger (2). The amount of discharge compressed air depends on the desired change in engine load, which is sensed by the load sensor (15) (for example the accelerator pedal angle and/or the accelerator pedal derivative are sensed).