Pid Parameters; Gear Scale; Egt, Vss, Iat Scale - ECU Master EMU User Manual

Open loop control strategy
Open loop control allows you to control the boost pressure without PID. This strategy uses Boost
DC re map and does not use the Boost target table.
Closed loop control strategy
Closed loop control bases on PID control. The EMU will aim to obtain boost pressure defined in
Boost target table by reducing or increasing the duty cycle from the Boost DC ref map. Another
strategy to use in the closed loop operation is to use the Boost DC error correction table which
allows you to correct the value from the Boost DC ref table as a function of current boost error.

PID Parameters

Boost PID parameters are used to configure PID terms of the boost control strategy. The PID
controller works only when Closed Loop option is turned on.
PARAMETER
kP, kI, kD
Integral limit +
Feedback + / -

Gear scale

Gear scale table is used to define the scaling of boost pressure as a function of current gear. When
open loop boost control is used, the duty cycle value of the DC Ref table is scaled. When closed
loop control is used, both the DC Ref and Boost target tables are scaled.

EGT, VSS, IAT scale

Scale tables are used for scaling the boost pressure as a function of EGT, VSS or IAT. When boost
control is used with open loop control, the duty cycle value of DC Ref table is scaled. For closed
loop control both DC Ref table and Boost target table are scaled.
DESCRIPTION
Proportional gain (kP), integral gain (kI), and derivative gain (kD) of PID
controller
The maximum saturation of the integral term (positive and negative)
The maximum value ( "+" and "-"), by which the controller can change
DC of solenoid defined in the Boost DC ref table
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