Dodge Journey just got a dual-clutch automatic as well, so I suspect
it may end up in a Jeep. I think Borg Warner is the supplier.
Thanks again for this tip. It's a good topic.
I looked into the carbon-carbon brake technology. Seems they take
quite a while to heat up to the point where they are effective, so
they're not very practical in passenger cars. However, some ceramic/
carbon composites are now making their way into luxury performance cars.
On Oct 30, 2009, at 8:50 PM, John Francis wrote:
Jeep and "gee-whiz technology" don't belong in the same discussion :-)
Twin-clutch transmissions are semi-automatic or full automatic
transmissions that don't have a torque converter (which is one
of the biggest sources of power loss in an automatic transmission).
You need computer-controlled transmissions to make them usable,
so although they were seen in performance cars in the 80s (the
Porsche 956 & 962 in sports car racing, and the equally dominant
Audi Quattro rally car), it's only recently that they showed up
in cars in the showroom. They are mostly to be found in high-
end performance marques (Bugatti, Ferrari, Porsche, BMW, . . .),
but Ford and VW use them in models for the consumer marketplace.
The benefit, for performance cars, is the very fast shift times
that are possible (1/10 of a second or less).
On Fri, Oct 30, 2009 at 04:55:19PM -0700, Sandra Hermann wrote:
Why in the world would you need more than one clutch? Isn't one
bad enough?
JG
P.s. I think Jeeps may be a great topic.....
?Help me support Autism research!? Join my
team!??http://www.walknowforautism.org/stlouis/blubiconsbuddies
?http://stampmine.blogspot.com/http://samsphotopage.blogspot.com/?
--- On Fri, 10/30/09, John Francis <[email protected]> wrote:
From: John Francis <[email protected]>
Subject: Re: OT: Car buffs, help needed
To: "Pentax-Discuss Mail List" <[email protected]>
Date: Friday, October 30, 2009, 3:31 PM
On Fri, Oct 30, 2009 at 04:13:55PM
-0400, paul stenquist wrote:
What's the latest gee-whiz technology in the auto biz.
Looking for?
topics that are unusual and somewhat obscure. For
example the ceramic?
brake disc is potentially a good topic, the hydrogen
fuel cell? is?
probably not. Any ideas will be greatly appreciated.
The place to look for cutting-edge technology is often in
racing,
and typically in F1 and/or WRC.
Currently F1 is using carbon/carbon brakes - ceramics are
old hat.
If you're looking for technology that's just beginning to
show up
in cars driven by mere mortals, twin-clutch transmisssions
might
be worth taking a look at.
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link
directly above and follow the directions.
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above
and follow the directions.
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above
and follow the directions.
--
PDML Pentax-Discuss Mail List
[email protected]
http://pdml.net/mailman/listinfo/pdml_pdml.net
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
