henry wrote: ↑
Fri Oct 18, 2019 10:50 am
atanatizante wrote: ↑
Thu Oct 17, 2019 9:26 pm
Sorry for being a non-English native speaker, but if I understand correctly you said that there are at least 3 distinctive phases when the car runs on the straight: the first one is down purely on electrical boost via MGU-K in order to help to break the inertial car`s momentum, then the car goes to ICE boost and at the 3rd stage is an MGU-K + ICE phase?
Hence that`s the reason why it seems that Ferrari is accelerating further when reaches a speed over ~ 230km/h and Merc`s acceleration is plateaued? It seems to me that from that speed Merc`s car is running out of juice aka e-boost, don`t you think so?
So the reason they are out of juice or e-boost is the time management of different types of powers available to them or just that they have more deployment time due to their better MGU-H than the rest, giving them more free electrical energy to the MGU-K which is free by the rules?
And another primordial question: Ferrari has such an MGU-H advantage that could run it at 100% over the entire lap (at least in the Q3 and overtaking & defending situations) something that other manufacturers can`t do that, yet?
Thank you for being patient with my English explanations, it’s my native language I should do better.
Let me try again.
Once the car is not traction limited they want to accelerate with the maximum possible power. This is e-boost, it drains the ES very quickly, around 200kW, but gives the highest possible PU power.
They then close the wastegates and run with the ICE + full MGU-K. The MGU-K receives energy from the MGU-H and the ES. The ES energy drain is much lower, 60kW, and the PU power only a little lower. I call this self-Sustain plus.
If the straight is long enough they switch to ICE + partial MGU-K. The ES contributes zero energy and the PU power is lower again, ICE power plus MGU-H power. This is usually referred to as self-sustain and they can run this until the fuel runs out.
Your conclusions are correct. If they have more power from the MGU-H they can run each of e-boost and self-sustain plus for longer and they can also run self sustain at a higher power.
To answer your other question. If in qualification Ferrari only ran max-power, e-boost, and not self sustain plus, they would only be able to run it for about 30 seconds. That might be enough for Monaco, but everywhere else they would be running the second half of straights in self-sustain which is probably 90 to 100kW lower. The speed traces don’t suggest that’s how they do it.
No, I think I must thank you instead, for indulging and wasting your time with thorough explanations for me
But being an analytical person, I must say there are some things that I still don`t understand. Such as:
1. You said: “Once the car is not traction limited, they want to accelerate with the maximum possible power
”. Which case or configuration gives them to the max. possible power? full ICE + full MGU-K, isn`t it?
2. Then you said further: “This is e-boost, it drains the ES very quickly, around 200kW, but gives the highest possible PU power.
” How come? By the rules MGU-K deploys max. 120kW … or maybe it can deploy 120kW only from ES and whatever kW comes out from MGU-H is adding to that 120kW limit imposed by the rules … so in case of 200kW (per second, I think you mean) as you mentioned, 120kW comes from ES and another 80kW from MGU-H?
3. “They then close the wastegates and run with the ICE + full MGU-K. The MGU-K receives energy from the MGU-H and the ES. The ES energy drain is much lower, 60kW, and the PU power only a little lower. I call this self-Sustain plus.
”. If I`m not wrong and my above max. 120kW MGU-K deployment statement is correct, then MGU-H could give them only 60kW/sec …
4. “If in qualification Ferrari only ran max-power, e-boost, and not self-sustain plus, they would only be able to run it for about 30 seconds
” … 33.3 sec/lap precisely, thus in self-sustain mode just for 66.6 sec/lap had the MGU-H deploys 60kW/sec. … What if it can deploy 120kW/sec? Then they could run it all over the entire lap! At least in qualy when they don`t need to save fuel ...
5. “That might be enough for Monaco, but everywhere else they would be running the second half of straights in self-sustain which is probably 90 to 100kW lower
…” So just ICE + MGU-K at 20-30kW/sec?
6. “The speed traces don’t suggest that’s how they do it.
” Can you speculate further? What're your thoughts?
7. In which case they have the biggest acceleration phase? In self-sustain plus mode, full ICE + full MGU-K mode or just only on full MGU-K mode?
I thank you in advance for your answers!