During engine braking operation, while the engine braking valve is activated, {HEAD ~ a guide vane position} corresponding to {TAIL ~ the desired engine braking performance} can be derived from the performance graph by way of the predetermined compressor mass flow and the predetermined compressor total pressure ratio 
corresponding to
During engine braking operation , while the engine braking valve is activated , { HEAD ~ a guide vane position } corresponding to { TAIL ~ the desired engine braking performance } can be derived from the performance graph by way of the predetermined compressor mass flow and the predetermined compressor total pressure ratio
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH