Volkswagen Marine SDI 55-5, Руководство пользователя

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59
Superior Technology
Guide vane adjustment
The guide vanes together with their shafts are
mounted on the carrier ring. The guide vanes are
connected by means of a shaft to the guide pin.
This guide pin engages in the adjustment ring
such that all guide vanes are adjusted
simultaneously as the adjustment ring rotates.
The adjustment ring is turned by the vacuum cell
in connection with the control linkage.
In connection with the acceleration in the flow of
the exhaust gas, the constricted inlet cross section
results in a higher turbine speed. The flow rate of the exhaust gas increases as the
engine speed increases. The inlet cross section
becomes larger so that the boost pressure and
turbine output remain constant over a wide
speed range.
Exhaust turbocharging
MSSP_001_049
Carrier ring
Guide vanes
Pressure cell
Control linkage
Guide pin of control
linkage
Guide pin
Shaft
Adjustment ring
MSSP_001_074
Flat guide vane setting
=
Narrow inlet cross section
of exhaust gas flow
Steep guide vane setting
=
Large inlet cross section
of exhaust gas flow
Direction of
rotation of
adjustment ring