Rally1 hybrid cars (2022-)

[wwbroe]

https://dirtfish.com/rally/wrc/how-t...ost-will-work/

[dimviii]

https://dirtfish.com/rally/wrc/how-t...ost-will-work/

Now we know more about how the boost can be deployed, how is it stopped? By hitting the brakes?

“That’s correct,” said Fowler. “During normal braking you’re regenerating but if you’re deploying during an acceleration phase and you touch the brakes then you’re required to stop deploying, in a similar way to if you touch the brakes when you have cruise control on on the freeway it might deactivate. It’s effectively the same situation.”


so drivers who use constantly the left foot brake have to change style?

[EstWRC]

I was thinking that isn’t Ogiers and Tanaks braking style an advantage for generating the energy?

[wyler]

Now we know more about how the boost can be deployed, how is it stopped? By hitting the brakes?

“That’s correct,” said Fowler. “During normal braking you’re regenerating but if you’re deploying during an acceleration phase and you touch the brakes then you’re required to stop deploying, in a similar way to if you touch the brakes when you have cruise control on on the freeway it might deactivate. It’s effectively the same situation.”


so drivers who use constantly the left foot brake have to change style?

depends on what actually means hitting the brake.
possibly they can set a bar pressure threshold that activate the interruption, so u can touch the brake until a certain pressure before stopping the boost.

[andyone]

Now we know more about how the boost can be deployed, how is it stopped? By hitting the brakes?

“That’s correct,” said Fowler. “During normal braking you’re regenerating but if you’re deploying during an acceleration phase and you touch the brakes then you’re required to stop deploying, in a similar way to if you touch the brakes when you have cruise control on on the freeway it might deactivate. It’s effectively the same situation.”


so drivers who use constantly the left foot brake have to change style?

but why lol. they should just put a button to do that

[WRCStan]

Sounds like a brake pedal sensor that cancels deployment with any input, if they're balancing a car already at speed they probably don't want the boost, but that's not energy wasted as it'll be available under acceleration out of the next slow corner, providing they're pointing and travelling the right way.

With energy regen, at first I thought nobody's going to be braking later and harder then they already do and that was it. But regen is active above 5 bar pressure of the front brake and some rear braking comes with the regen capture. To what degree does balancing the regen desire strategy with braking efficacy affect setting brake biases and then standard left footing, in reality and in heads? Maybe it's not so simple, maybe it's not worth the thought. In two weeks I'll find out.

[Mirek]

The thing is that with recuperation you can brake harder and later when there is enough grip. The recuperation takes away reasonable part of the energy which would otherwise transform all into heat.

[WRCStan]

The thing is that with recuperation you can brake harder and later when there is enough grip.

Then why weren't you doing that before? All other factors equal, what changes with just introducing regen?

[Mirek]

Then why weren't you doing that before? All other factors equal, what changes with just introducing regen?

If there was only one short braking in the whole stage than the recuperation would make no change but there is a lot of braking. Every braking generates heat. The harder you brake the more heat you produce and the more you need to dissipate. The cooling effeciency is however limited, therefore you can brake only that much that your brake fluid dosn't start to boil or your brake pads don't start to glaze or even burn. When you recuperate energy you create much less heat by braking which means that the same amount of the energy you recuperated during the stage you can also spend on extra braking without overheating the brakes. That may create really big difference especially on stages like in Catalunya.

[Tanelv]

It would be interesting to know what is the maximum regen power they will get and what is the net capacity of the battery in kWh. Maybe it has been provided already somewhere? It would be an interesting thing to show, what is the % of the battery and what is the current regen power and regenerated energy in a sector/braking etc.

In a trip in Norway with a Kona EV I managed to regenerate 5 kWh in around 15 km when descending from 1300 m a.s.l to 9 m a.s.l (the road from Turtagrø to Øvre Årdal). Kona allows a maximum 150 kW charge to battery when recuperating (measured with an OBD dongle), Taycan should allow up to 300 kW if I remember correctly. But as the Rally1 battery is probably quite small I believe their maximum regen power is lower, otherwise the C would be very high and the battery longevity would suffer.