2025/2026 Hybrid Powerunit speculation

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
wuzak
wuzak
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Joined: 30 Aug 2011, 03:26

Re: 2025/2026 Hybrid Powerunit speculation

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dren wrote:
11 Sep 2025, 18:38
BassVirolla wrote:
11 Sep 2025, 14:29
dren wrote:
11 Sep 2025, 14:16


He's right semantically, recovery is only through braking since otherwise that's "lost" to heat. But, energy will also be converted/stored in the batteries through burning gas and using the motor as a generator. He knows that and I'm sure has read the many pages of posts by you and others in this thread.
Even more, the ruleset states about torque demand from the power unit. They can (and I think they will) put a MGUK load against engine torque, outputting a net zero (or so) PU output. I strongly think that the lift and coast will be massive and will sound funny.
Oh yeah, revving engines through the bends. It'll be interesting sounding for sure!
The rpm is constrained by the gearing.

At the hairpin at Monaco, for instance, the engine speed can dip as low as 5-6,000rpm. This will still be the case.

What will change is that the ICE will be making power and the MGUK recovers, more or less, the same power, matching the driver's power demand of approximately 0kW.

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BassVirolla
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Joined: 20 Jul 2018, 23:55

Re: 2025/2026 Hybrid Powerunit speculation

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wuzak wrote:
11 Sep 2025, 18:47
dren wrote:
11 Sep 2025, 18:38
BassVirolla wrote:
11 Sep 2025, 14:29


Even more, the ruleset states about torque demand from the power unit. They can (and I think they will) put a MGUK load against engine torque, outputting a net zero (or so) PU output. I strongly think that the lift and coast will be massive and will sound funny.
Oh yeah, revving engines through the bends. It'll be interesting sounding for sure!
The rpm is constrained by the gearing.

At the hairpin at Monaco, for instance, the engine speed can dip as low as 5-6,000rpm. This will still be the case.

What will change is that the ICE will be making power and the MGUK recovers, more or less, the same power, matching the driver's power demand of approximately 0kW.
I don't remember the numbers, but the fuel flow is also restricted to throttle pedal position. Some time ago I did some calculations and the amount of recovery through this is not a lot, but not negligible.

saviour stivala
saviour stivala
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Joined: 25 Apr 2018, 12:54

Re: 2025/2026 Hybrid Powerunit speculation

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With no MGU-H, the only way to harvest energy and rechacharge the battery will be through the motor generator unit - kinetic during braking.

saviour stivala
saviour stivala
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Joined: 25 Apr 2018, 12:54

Re: 2025/2026 Hybrid Powerunit speculation

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When I say that the only way to charge the battery is through the motor generator - kinetic when under braking, I don't mean that the motor generator cannot be made to charge by other means, it is my personal opinion that the rules will not allow the batteries to be charged by any other means.