Throttle-by-Wire

[Bernd Felsche]

Asylist tapped away at the keyboard with:

> > Well, boggle me pink, but isn't that precisely what you do when you
> > heel-and-toe for downchanges into a tricky bend/corner to avoid
> > breaking traction?

> Well yes, it is, to a point.  But how many of the people buying
> those cars actually know and use that technique with the car?  If
> I am going to buy a car for aggresive driving, a VW TDI isn't one
> of my top choices, lol

Try one of the more-powerful (and torquey) models available in
Europe. They do really well in rallyes too.

Besides; it's not uncommon for the same method of TBW to be used
with gasoline engines; i.e. close throttle when brake is applied,
regardless of accelerator pedal position.

Of course, the inevitable instability can be countered by throwing
more technology at the problem just (artificially) created; you add
"ESP" or somesuch that selectively applies brakes for a modicum of
stability at reduced speed. It's not appropriate to have the
throttle closing under those conditions; especially if it takes 0.1
seconds or more for the throttle to reset to the position it should
have always been when the driver gets off the brake pedal.

0.1 seconds doesn't seem like much; but it is equivalent to several
metres on a fast corner.

-- 
/"\ Bernd Felsche - Innovative Reckoning, Perth, Western Australia
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