[s-cars] future of awd

[Taka Mizutani]

That's the biggest issue, Keith- the Haldex implementation in the Volvo R
cars will shutdown mid-corner at the track.

The track junkies on V70R.com have posted about off-course excursions when
the Haldex shuts down on them.

If it's a cooling issue, I guess the solution would be to install something
like a transmission cooler- the biggest issue would be to figure out where
to mount it so that it would work effectively.

Taka


On 4/25/07, Keith Maddock <keith.maddock at gmail.com> wrote:
>
> The question is.. is this useful (for hardware protection) shutdown in
> the Haldex smart enough to not bail out in the middle of a
> limit-handling procedure?
>
> I know it COULD be, whether or not thats implemented or not is a
> different question.
>
> eAWD is a pretty cool area - there is lots of hardware, lots of
> computing power, lots of software.  What will set the OEMs apart from
> eachother, in the next few years, is:  Who is willing (or able) to
> spend the development money (or force their suppliers to spend the
> development money on their own systems plus work together with the
> other supplier systems) to make the most out of this capability? -
> Especially when it's dubious if the end-user customer base gives a
> cr at p enough to differentiate/discriminate between a GOOD eAWD
> integration and a so-so one, to give the OEM a payback for their
> investment.
>
> The more I see, the more I want to keep buying cars for my own
> driveway with a Torsen.  Stellar performance 99.99% of the time, and
> at 100k or 200k or 300k when all the electronics break down, you still
> have AWD.  Give me X-Drive in a M5 or M3, and enough $$ to lease a new
> one every 2-3 years, and I'll defect :)  (either that or get me the
> heck out of the midwest...)
>
> Just my 2cents, which has a NPV of zero.
>
> Keith
>
> On 4/25/07, QSHIPQ at aol.com <QSHIPQ at aol.com> wrote:
> >
> > News to me, I can certainly discuss this with Haldex, or maybe Keith
> Maddock
> > can pipe in here.
> >
> > And/or Colin can pipe in here.  Taka, I know that our group A S2 had
> coolers
> > for trans and rear diff.  I know even with coolers, torsens break from
> heat,
> > lockers break from heat, and VC will hump and fail from heat.  Prodrive
> > can't keep transmissions in the subarus in rally.
> >
> > I suspect that since Haldex is raced, that a cooler would help
> emensely.  I
> > also appreciate the fact that Haldex has an overheat shutdown, that
> > protection is what the scoobies really need.
> >
> > SJ
> >
> >
> > In a message dated 4/25/2007 6:31:55 A.M. Central Standard Time,
> > t44tqtro at gmail.com writes:
> > Scott-
> > One thing- until the Haldex engineers install a cooling system for the
> > Haldex, it's a liability at the track. The V70R forum is full of people
> who
> > have tracked their cars and experienced Haldex overheating and shutdown.
> The
> > car goes to FWD only when that happens, without any real warning.
> >
> > I would not track any car with Haldex for that reason alone, until
> someone
> > figures out how to cool the system down so that it does not overheat.
> >
> > Note that this doesn't happen on the street, but in the extreme
> environment
> > of track days and experienced drivers pushing the car to its limits,
> > probably with R compound tires and race pads. (most likely so,
> considering
> > the same guys heat their calipers to the point that the grey paint
> becomes
> > burnt orange)
> >
> > Taka
> > _______________________________________________
> >
> >
> >
> > ________________________________
> > See what's free at AOL.com.
>
>
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