TURBO-CHARGED DIESEL ENGINE WITH LONG-TERM EXHAUST GAS RECYCLING SYSTEM

摘要

A turbo-charged diesel engine is provided with a "long route" exhaust-gas recirculation pipe (18), which branches off from a main exhaust pipe (14), downstream of the turbine (15) of the turbosupercharger assembly (9, 15), and converges in a main intake pipe (6) of the engine, upstream of the compressor (9) of the turbosupercharger assembly (9, 15). In combination with said long-route recirculation pipe (18), there can be provided a further short-route recirculation pipe, which branches off from the main exhaust pipe (14) upstream of the turbine (15) and converges in the main intake pipe (6) downstream of the compressor (9); or else, alternatively, there can be envisaged a system of programmed variable actuation of the engine valves to provide a simultaneous temporary opening of the intake valve and of the exhaust valve of each cylinder of the engine in order to obtain an exhaust-gas recirculation directly inside the engine. IMAGE