DOUBLE-CIRCUIT GAS RECIRCULATION SYSTEM OF AN INTERNAL COMBUSTION ENGINE WITH GAS TURBINE SUPERCHARGING Russian patent published in 2019 - IPC F02M26/00 F02M26/04 F02M26/10 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in internal combustion engines equipped with exhaust gas (EG) recirculation systems. Double-circuit gas recirculation system of internal combustion engine with gas-turbine supercharging includes pipelines connected with gas ICE and ICE exhaust gases control devices and air supplied to engine, electronic control unit (1) with gas exchange control devices, turbo compressor (2), exhaust gas processing unit (3) and two exhaust gas recirculation circuits (5, 6). Exhaust gas treatment unit is located in exhaust path (4) after the turbo-compressor. Two EG recirculation circuits are communicated with recirculating gas cooling heat exchanger (7). System is equipped with gas exchange control devices in the form of three multi-position (8, 9 and 10) and two two-position (11, 12) dampers. Two multi-position dampers (8, 9) are arranged on the outlet path, and third (10) is arranged in the main recirculation channel (16). Input (13) of primary circuit (5) of exhaust gas recirculation is located after the exhaust gas processing unit to the second multi-position dampers (9). Output (15) of primary circuit of recirculation of exhaust gases is communicated with main recirculation channel with possibility of control by the first two-position damper (11). Inlet (17) of secondary circuit (6) of the EGR is located after turbine (14) of the turbo-compressor to the first multi-position damper (8) and to the EG processing unit. Output (18) of secondary circuit of recirculation of exhaust gases is interconnected with main recirculation channel with possibility of its control by the second two-position damper (12). Main recirculation channel is communicated with inlet path (19) with possibility of control of the third multi-position damper (10).

EFFECT: technical result consists in reduction of emissions of nitrogen oxides, hydrocarbons, suspended particles and improvement of fuel efficiency by enlarging capabilities of range of use of recirculation of exhaust gas by external circuit in all operating modes of engine.

1 cl, 4 dwg