Subpage of Boost Control Menu
Boost/Idle/Lambda settings
The Round Unit has a High Power control output (named Boost solenoid).
The output can use for several control feature: Boost control,Idle control or Lambda control
The output is on the DSub15 connector pin 8. It can pull down to GND.
Control methods:
All control method has a PID controller a reference curve and a target curve.
The PID controller
The PID controls the output to set the system to the target point.
The output PWM value = reference curve(RPM) + P term + I term + D term
P term: ( target value - measured value) * KP * 100/2048
I term: Boost integral * KI * 100 /256 (Boost integral increments by (target value - measured value) / 16 in every ms )
D term: (Previous measued value - actual measured value) * KD / 8192 (measurement are in every ms)
Integral limit : maximum of boost integral change
The reference curve
It is the base PWM output when the measured value equals to the target.
The target curve
The target is the value which needed in the system. (For example: 200Kpa)
It is different in different method, see at the target curves.
Special note to Boost target:
The Boost method use the analog input as a MAP sensor.
Before use the control function, calibrate your Analog in to show value in Kpa (
Analog input settings).