PlatinumZealot wrote: ↑
Thu Oct 22, 2020 3:54 pm
Already discussed in Honda thread, there is nothing to gain by wasting fuel in the exhaust, but reducing the life of the turbocharger and exhaust piping.
Not true, it's been demonstrated in a paper I posted but was deleted, that the turbine attenuates even severe detonation without pitting or any bearing damage(experiments trump theory 100% of the time). Only the exhaust pipe suffers, but those get changed out every GP.
Also consider that output of the power unit is time averaged, it does not capture the individual discreet events that happen at all engine speeds. It depends on the speed of the control electronics and the anticipation strategies, perhaps small pressure peaks at the turbine can be harvested similar to Honda's extra harvest strategy. The difference is the anticipation, you have to be able to predict the acceleration pulses of the turbine in order to harvest them. When charging the ES via extra harvest, everything is predicted. The MGU-K harvests crank power, the CE switches the MGU-H to motor and accelerates the turbo, and instantly switches to generator at 40Hz intervals.
Question is what is the switching limit of the CE? Could it capture a 1,000Hz pressure wave accelerating the turbine?
Also consider that detonation events are going to happen whether you want them to or not while the engine is running, you can't avoid them, period, end of story. Might as well try to get something out of it instead of just melted pistons.
I understand that the difference between deflagration and detonation is the difference between a push and a slap, but it's going to happen anyway, no matter what you do. You can minimize detonation, but if you're pushing the engine for power it's going to happen, it happens with any ICE. These engines do still knock.