Purpose
The supply of additional air to the engine cylinders using the energy of the exhaust gases.
Turbocharger boost pressure control with fixed gas turbine geometry.
The boost pressure is controlled depending on the readings of the boost pressure sensor according to the algorithm available in the control unit.
The vacuum transducer, controlled by the control unit, supplies the control vacuum to the vacuum chamber (1) (see fig. VN 2.109), which, by means of a rod, controls the position of the bypass damper (13).
When the bypass damper is open, the engine is in natural suction mode. When the damper is closed, the entire volume of exhaust gases is directed to the turbine wheel (6), and the turbocharger is running at full power.
Boost pressure control in a variable geometry turbocharger of a gas turbine
Another, more advanced design of the turbocharger provides for the regulation of the turbocharger speed by changing the angle of the fixed blades (12) gas turbine guide vanes. All rotary vanes are connected by one ring (10), during the rotation of which the blades rotate synchronously. On rice. VN 2.110 it is shown that when the angle of installation of the blades changes, the gaps change (13) And (14) between them, through which the flow of gases is supplied to the turbine wheel.
The synchronization ring is driven by a vacuum chamber (17) via mechanical control rod (8).