SSANGYONG Korando 2012 Manual page 328

15-30
d. E-VGT system control
Turbocharger system operates the E-VGT actuator according to the signals for engine epm,
accelerator pedal position, atmospheric pressure, T-MAP, coolant temperature and intake air
temperature.
Turbocharger actuator is performed PWM control by ECU.
In general, the boost pressure feedbacks the turbocharger operation and the boost temperature is
used for calculating the precise density.
E-VGT provides higher engine power with faster reaction speed compared to conventional VGT.
Operating wave
Low
speed
range
High
speed
range
Vane
In low speed
range: retract the
vane to increase
boost pressure.
The vane has low
(-) duty, and the
unison ring moves
to retract the vane
in weak PWM
signal.
The unison ring
moves to extend
the vane in strong
PWM signal.
Maximum pressure
is 3 bar and the
system controls it
according to the
input signals.
Control