Rally1 hybrid cars (2022-)

[1988senna]

Man, please aducate yourself in basic physics. Your questions make no sense whatsoever.

First kW or Hp is NOT a unit of energy. It is a unit of power which is a different thing. Power is a quantity used to describe energy flow per unit of time.

The energy is described by joule or Wh (power multiplied by time). In this case the energy is 3,9 kWh which means that the battery is large enough to give the car 3,9 kW steady power for 1 hour, or 234 kW for one minute. That is of course without any recuperation, i.e. recharging by braking power.

The extra power the WRC system can deliver is 100 kW. Now divide 3,9 kWh by 100 kW and you get that the battery capacity is enough for 2,5 minutes of full boost. For city cruising on the road section it can be likely around 3x more.

But of course the recuperation adds a lot of energy. We don't know what recharging power can be used in WRC cars but a heavy braking produces much higher power than the extra boost, which means that the time spend on braking to recharge the energy is not long.

thanks for explain .I really misunderstand the kW and the kWh. if it's 80% of the total capacity always .then the really capacity is 3.12kWh right?

I see some artical said the driver can make the regen to let the battery up to 80% during the road section .so that it can be ready for next stage.but if there have not enough length road section or not enough time for regen to back to 80%.what could the driver do

and for the boost time. the 3.9kWh can boost for 2.5 minutes with 100kw .so if there have the long long straight during the stage.will the driver make the boost as long as possible or they will touch the brake to end boost to save the energy

will the team reduce the each boost power less than 100kw(90kw 80kw ) for the long stage like 40km with more long straight stage in Finland