On 28/04/14 10:42, Dave Plowman (News) wrote:
In article ,
Johny B Good wrote:
On Sun, 27 Apr 2014 23:51:47 +0100, "Dave Plowman (News)"
wrote:

In article ,
Johny B Good wrote:
What you're overlooking is the fact the 'generator' mode load current
will be well within the normal peak running current specificied for
its use as a motor.

What you're suggestion is peak retardation will be on a par with peak
acceleration. Nonsense.

If we're talking about a family car with comparable acceleration
performance to that of a mid specced ICE powered car, then peak
acceleration will be limited by tyre grip, say a tad over 1G. The same
tyre grip consideration applies on deceleration so the same peak motor
current limit applies.

There is no family car ever built where it will break traction through
engine torque.

Rubbish. Even my old Bedford CA MkII VAN would do that below 5mph.

Conversely there are very few family cars that will lock wheels at 70mph
either.


But even the most basic is capable of doing that by hard
braking if it doesn't have ABS, etc.

Not at 70mph. try it.

To get *any* car which will accelerate as fast as it brakes means going
for some very exotic machinery indeed.

Or an electric motor and a supercapcitor.,



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