saviour stivala wrote: ↑
Wed Aug 07, 2019 7:33 am
“The turbo RPM is under full control of the ‘H’”. Nobody said it is not.
Your original statement suggested that increased turbine speed was a direct consequence of opening the wastegate which it is not. What happens to turbine speed and the opening of the wastegate are both consequences of signals from the ECU. It is highly likely that the turbine was already operating at the speed which produces optimum AFR and so will not increase when the wastegate opens.
When the waste gates are opened it is a call/demand for maximum power output from the ‘power unit’.
Nobody knows that for certain. It is possible other modes call for wastegate opening.
Maximum power output from the power unit calls for. Full fueling permitted. Maximum boost.
Nobody knows that for certain. Boost will be adjusted to achieve best power AFR which has little to do with "maximum boost"
Minimizing exhaust back pressure.
In this mode the compressor is being used in electric mode. Both the ‘H’ and the ‘K’ are sharing battery power. (The ‘K’ is also contributing to the output) that is why it is called maximum ‘POWER UNIT OUTPUT”.
When that call/demand is made (maximum power unit output) the turbo is certainly not running at full boost and full turbo RPM. So when the waste-gate/s open the turbo will be speeded up to it maximum RPM
Not necessarily. Maximum turbo RPM is limited in the rules to 125k RPM (since no teams use other than 1:1 MGUH gearing) and that speed is probably rarely used other than at high altitude tracks.