The invention discloses an
internal combustion engine system, and belongs to the technical field of internal
combustion engines. The
internal combustion engine system comprises an internal combustionengine (1), a first
turbine (2), a first
air compressor (3), a second
turbine (4), and a second
air compressor (5), wherein an air inlet and an air outlet are formed in the
internal combustion engine(1); an inlet of the first
turbine (2) communicates with the air outlet of the internal
combustion engine (1), an inlet of the first
air compressor (3) communicates with the
atmosphere, an outlet of the first air compressor (3) communicates with the air inlet of the internal
combustion engine (1), an inlet of the second turbine (4) communicates with an outlet of the first turbine (2), an inlet ofthe second air compressor (5) communicates with an outlet of the second turbine (4), an outlet of the second air compressor (5) communicates with the
atmosphere, the first turbine (2) is coaxially connected to the first air compressor (3) and the second air compressor (5) through a first shaft
system (6) and is used for driving the first air compressor (3) and the second air compressor (5) to rotate so as to apply work, and the second turbine (4) outputs power through a second shaft system (7). According to the internal combustion engine system, one turbine is adopted to drive the two air compressors to rotate, the other turbine carries out
power output, comprehensive
recovery and utilization of energy of
exhaust gas are carried out by utilizing reverse
Brayton cycle, and meanwhile, air inlet supercharging of the internal combustion engine is taken into consideration so that the energy
utilization rate of the whole system can be higher.