Internal combustion engine provided with a decompression-type braking device and with a turbocharger having a variable geometry turbine

摘要

An internal combustion engine (1) provided with a decompression-type braking system (2) and with a turbocharger (3) having a variable geometry turbine (10), in which the effective flow section (S) of the gases entering the turbine (10) under the maximum braking power condition is maintained at least equal to a safety limit value (ST) calculated on the basis of geometrical characteristics and of limit values of operating parameters of the engine (1) and of the turbocharger (3) for the purpose of achieving the maximum braking power compatible with the safety of the engine (1) and of the turbocharger (3).