Quote:
Originally Posted by gwyllion
Thanks a lot for those numbers.
So you are saying that the e-tron quattro system can be used to improve traction as it can be activated in high speed corners (above 120 km/h)?
I have a followup question. How long (minimum, average, maximum) do these braking moments take? According to the rules the braking must last more than 1 second.
With 150 kW generators and a round-trip efficiency of 70%, the braking must last almost 5 seconds in order to recover enough energy to release 500 kJ after the corner.
It might be desirable to make the capacity of the energy storage medium (battery, capacitors, flywheel) bigger than 500 kJ. In this case, more energy can be stored than necessary if the braking is longer than 5 seconds. This reserve energy can later be released after a braking zone that is shorter than 5 seconds.
If Toyota can apply 1 MJ between braking zones, they need a bigger generator because they have to recover more than 10 MJ per lap with only 34 seconds of braking. The generator has to be 300 kW! Unless they count less than 10 KERS activations.
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Go to youtube and find a video where an Audi or Peugeot trails the other for a complete lap, seen inboard from the car behind
. (im currently at work so youtube is a no go for me).
Also as you quote, Toyota is not allowed to use more than 500kj between braking zones, so they will not be able to use all gathered energy.
What intersting information we could get from that video of two cars trailing each other, is how long the different braking zones are. Because Audi believes they are long enough to gather 500kj per corner, and Toyota believes that its not, and need the carry "extra juice" from a previous corner. This is ofcourse based on the thought that Audi and Toyota wants to release 500kj everytime