CHARGING SYSTEM Russian patent published in 2021 - IPC F02B37/24 F02B37/07 F02D23/00 

FIELD: engine building.

SUBSTANCE: invention relates to engine building, and in particular to a pressurization system. The boosting system comprises a first blower (30), which includes a first turbine (32) driven by the exhaust gas, and a first variable nozzle mechanism (35) regulating the exhaust gas flow rate by the opening degree of the first variable nozzle, and which injects air drawn into the engine (1). The second blower (40) includes a second turbine (42) driven by the exhaust gas, and a second variable nozzle mechanism (45) regulating the flow rate of the exhaust gas flowing into the second turbine (42) through the opening degree of the second variable nozzle, and which pumps air drawn into the engine (1). The control device (200) switches the boost modes and is configured to perform a start-up operation that supplies the first blower (31) with air blown by the second blower (41) while supplying exhaust gas to the second blower (41) before switching from the first boost mode to the second boost mode, performing a switch to the second boost mode when the boost pressure of the second blower (41) reaches the boost pressure of the first blower (31) during the starting operation. In addition, the device (200) controls the second variable nozzle mechanism (45) in such a way that the opening degree of the second variable nozzle mechanism (45) becomes less than the opening degree of the first variable nozzle mechanism (35) when the start operation is started.

EFFECT: reducing the unevenness of the boost pressure.

4 cl, 11 dwg