I'm hoping someone can enlighten me to the workings of the wastegate pressure controls for boost control.
I am looking to solve a few issues with target boost on a GPR-Drag package that is using CO2 and wastegate pressure to control boost. I have read through the help associated with it but still have questions as to boost aim when wastegate pressure is driving.
Currently it has onlt wastegate offset set to -70kpa to account for the wastegate spring. I am seeing a higher boost pressure than target, how does boost aim resolve itself when in open loop? is it just using the wastegate aim or is there more of the boost aim system working to reach target boost?
Since I am seeing more than target boost will a negative wastegate scale allow compensation and enable closed loop and drive boost aim to the requested level?
I am sure there are a small number of cars using this and values from each application may differ greatly, I'm looking for clarification as to how the system operates with and without closed loop so I can make this system more accurate
Regards all.