METHOD (OPTIONS) AND SYSTEM FOR ENGINE Russian patent published in 2019 - IPC F02B37/18 F02B37/24 F02M26/02 F02D23/00 F02M26/52 

FIELD: machine building.

SUBSTANCE: invention relates to mechanical engineering, in particular to methods and systems for controlling pressure in a supercharged engine system. This method for engine (10) comprises steps in which variable geometry turbine (116) is controlled by means of controller (12) of engine (10) based on the difference between the exhaust pressure and the intake pressure in order to reduce the specified difference below the threshold value of the difference. This difference is determined by controller (12) of engine (10) based on signals from exhaust pressure sensor (129) and air pressure sensor (124) in intake manifold (22). Using controller (12) of engine (10) adjusts exhaust gas recirculation valve (53) connected to the exhaust gas recirculation system based on the difference between the exhaust pressure and the intake pressure in order to reduce this difference. This adjustment of exhaust gas recirculation valve (53) is also based on engine speed (10), as determined by the crankshaft sensor, and the exhaust pressure. Adjustment of exhaust gas recirculation valve (53) contains an increase in the opening of exhaust gas recirculation valve (53) while reducing the speed of rotation of engine (10) and/or increasing the exhaust pressure, and reducing the opening of exhaust gas recirculation valve (53) with an increase in engine speed and/or a decrease in exhaust pressure. Exhaust pressure sensor (129) is located in the exhaust channel between variable geometry turbine (116) and the exhaust emission reduction device. Said adjustment is carried out in response to the excess of the first threshold value by the difference between the exhaust pressure and the intake pressure. Also disclosed is a variant of the method for the engine and engine system.

EFFECT: reducing the occurrence of discharge pressure surges, as well as reducing engine pumping.

16 cl, 5 dwg