Re: Â Turbolader,Wastgate,PopOff..usw..
ME 4.4 und andere kenne ich mich zu wenig aus. Bei ME7 ändert sich vor allem wann der Turbo einsetzt. Kann gut sein, dass es bei falscher Einstellung zu spikes kommt. Hier ein kurzer Beitrag von Lucky zu ME7:
"Firstly these cars don't create boost pressure at idle. Secondly, the ECU will still control boost via the TCV (which acts on the wastegate via boost pressure) withing the RPM range to allow or limit boost dependant on torque demand.
The purpose of wastegate adjustment is to set a base point from which the ECU can then influence the wastegate via the TCV. So by setting the wastegate 'tighter' you are allowing the ECU to start bleeding off pressure to the wastegate diaphragm later, or rather to say you aren't asking the ECU to start bleeding it off sooner than expected.
Why is this useful or helpful?
In ME7 cars the ECU adjusts boost based on torque request (pedal position) and will only generate the amount of boost necessary to meet the driver demand if conditions permit i.e. not overheating, wheels not slipping, not in violation of torque limit, etc..
So given any condition, boost will be dependant on power needs rather than a preset boost target that the ECU is trying to reach. Adjusting the wastegate allows the boost to develop sooner without the ECU having to activate the TCV when it otherwise would not. For instance, if the TCV was unplugged, it would by default route the turbo pressure to the wastegate which would open at a preset limit, say 5 psi. Meaning you would see only 5psi max.
Now assume the system is properly connected and working BUT what if the wastegate was not adjusted properly and it opened early, at say 3 psi? Then the ECU would have to activate the TCV earlier than normal to account for this variation (aka adaptation). While adaptation is good and can compensate for issues like this, proper adjustment is better. That is the purpose for wastegate adjustment." Quelle: Swedespeed