Victor Tikhonov wrote:
>
> Jeeeeees, very easy if an EV has regen. Just turn it on,
> stick on the third gear, engage regen, and in 30 min
> of towing your EV is full (regen current reach driving current
> levels, hundreds of amps).
>
> The only problem I see (besides there are too few regen capable EVs)
> is the tranny doesn't take towing very well for long
> time, much less loaded with regen tranny...
>
> Victor
That really shouldn't be a problem. Problem would arose if the motor
side of tranny would not be rotating - some (manual) boxes have forced
lubrication/pump driven from the crank side or they rely on motor side
gears to splatter the oil around. Some manufacturers just don't like
their car to be towed around much - it's bad for the image - so the
dread warnings.
Situation proposed would be no other than regen while driving. There are
however some other issues.
Full regen all the time would account to decent power consumption. For
example, 10 kw of regen could account to say 20kW of power from the
towing vehicle (10 /0.8 motor /0.9 gearbox /0.9 tires /0.9 tires 2/0.9
gearbox 2) not accounting the power to move both vehicles down the road.
It would probably seem like you were towing two vehicles. It could lead
to engine overheating or excessive tire wear. There might even be some
stability problems.
And there's not-so-remote chance all would be fine and sweetly charged
and the list will have to find some other problem to debate :)
Janez Svetlin
