saviour stivala wrote: ↑03 Apr 2022, 18:55
Airshifter wrote: ↑03 Apr 2022, 09:46
saviour stivala wrote: ↑03 Apr 2022, 06:25
(Insuring efficiency) ‘’2014 formula one power unit regulations – power unit 2014 – the changes are comprehensive, and so via straightforward explanation and with help of insights from FIA head of powertrain Fabrice Lom’’. Is a good start-up point to read all about how MGU-K harvests/harness kinetic energy from the car’s braking system that would have otherwise gone to waste. If as some persist in believing that the MGU-K also harvests/harness energy other than from the car braking system. Such harvesting harnessing of energy will be totally contrary to the aimed spirits of the regulatory body introduction of the ERS part of the power unit.
Being that the MGU-K is part of the cars braking system, I can agree that it would only harvest during braking events. But to me this does not dictate it only occurs when a driver hits the brake pedal.
And I've yet to see any regulation or directive that requires that to be the case. If anyone else has seen such a regulation or directive I like for them to cite it.
''Being that the MGU-K is part of the cars braking system (thanks for recognising that, and agreeing) that it would only harvest during braking events''. Is why I said that the brake pedal is the 'switch' that activates MGU-K harvesting. ''I have yet to see any regulations or directive that requires that to be the case'' You will not see any, simply because there is no need too as the intoducation of the new power unit statement for 2014 states ''ERS-K will harvest/harness braking kinetic energy that would have otherwise gone to waste''. Further to the above. this (MGU-K) part of the ERS system is not for free. But limited by regulations to a maximum of 2mj per lap of harvesting and a maximum of 4mj per lap of deployment. While the (MGU-H) part of the ERS system is for free in both harvesting and deployment. With the (ES) also being restricted by regulations to a maximum of 4mj per lap of deployment. And here another note. Some poeple are also wrong in still believing that because (MGU-H) deployment/harvesting is for free (unlimitted). (MGU-H - to - MGU-K) being unlimitted, (MGU-K) - to- engine crankshaft is also unlimitted. which is not the case. As (MGU-K) to crankshaft is still limitted to a maximum of 4mj per lap.
Well any time a F1 cars is off throttle it is essentially a braking event compared to most cars... even "lift and coast" slows them down quite a bit.
My point was simply that I've never seen any regs that requires them to apply the brake pedal, vs harvesting starting before a driver hits the pedal. As with deployment how aggressive or passive the system is can be varied, and it would seem to me that if harvest is aggressive it wouldn't wait for the driver to hit the brake pedal.
I'm not at all disputing the max allowances to/from any component per lap, or max power levels.
tpe wrote: ↑03 Apr 2022, 20:39
I haven't see in the regulation this restriction as you say. The path MGU-H --> MGU-K is unlimited.
The path MGU-K --> rear wheels is limited in terms of power (+/- 120KW).
In the Appendix 3 of the regulations (at least of the 2021) it's clear that there is no 4MJ restriction.
https://www.fia.com/sites/default/files ... -12-16.pdf
However, if you find it in another place, please send us the page. I believe it will be useful for everyone.
The max harvest and deployment figures are shown in the diagram, between the MGU K and battery.
Good find on the diagram as well, I had never noticed that one.