Comments on: ZF’s quick shifting 6-speed automatic thanks to “twin torsional dampers”

By: ALPINA BMW

ALPINA BMW — Wed, 17 Sep 2008 00:58:03 +0000

all these automatic nonsense, i just use manual

By: mct

mct — Mon, 15 Sep 2008 08:46:22 +0000

alihms:
electric motor have their top rev about 2500rpm
even though it have many torque from below 100rpm
but it still need a gear box to push the car to moved

By: jamsbong

jamsbong — Mon, 15 Sep 2008 05:02:04 +0000

With the exception of The Veyron and GTR, I think DCT still have to deal with high torque machines. With more experiences with the tradional auto gearbox, it is clear that ZF believes there is room for improvement.

Personally, in time when DCT can be heavily mass produced, then Auto box will be disappearing.

By: alihms

alihms — Mon, 15 Sep 2008 03:50:10 +0000

Electric cars would need gears no doubt – but not in the conventional sense of it (several fixed gears ratios coupled with manual or auto transmissions). The gears would probably by fixed at a certain ratio. Electric motor has enough torque at all rpm – thus eliminating the need for gearboxes. Electric motors inherently have high torque even at low speed. Electric motors can ‘idle’ at zero rpm!

For fuel cell, it depends. For internal combustion engine (ICE) design that uses hydrogen instead of fossil fuels, then those conventional gear boxes are necessary. But for majority of car manufacturers, the design that they pursue, bypasses ICE completely. There’s a lot of moving parts on ICE and on transmission setup – thus higher power losses & also a lot more parts to maintain. So, it makes more sense to bypass it altogether and use the fuel cell to powers electric motors directly – thereby no need for gearboxes.

By: Roti Naan

Roti Naan — Mon, 15 Sep 2008 03:01:53 +0000

Alifz said,

September 15, 2008 @ 10:32 am

I second you bmpower…

If say no gearbox for sure your electric more will ‘kong’ much earlier, cause too much pressure on high revolutions..
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Er, what do you mean by the “too much pressure on the high revolution”?

By: Alifz

Alifz — Mon, 15 Sep 2008 02:32:43 +0000

I second you bmpower…

If say no gearbox for sure your electric more will ‘kong’ much earlier, cause too much pressure on high revolutions..

By: bmpower

bmpower — Mon, 15 Sep 2008 01:42:38 +0000

electric also had a gear lah alihms!

By: alihms

alihms — Mon, 15 Sep 2008 00:17:19 +0000

This twin-clutch thingy, is really going to be a sunset technology soon. Once electrics and fuel cell powerplants are cheap and reliable enough for mass consumers, it would not be needed anymore.

Maybe I’m too optimistic, but my take is, those in the auto industries should not spend huge resources on RND and invest lot of monies to build factories and machineries for it. A small amount is sufficient, mainly to keep the competitors at bay and to keep people buying new cars (who would buy new cars if there’s no new things in them?) – but that just about it. Spend the rest of the resources towards the new ‘sunrise’ technologies. What say you guys?

By: m4xspeed

m4xspeed — Sun, 14 Sep 2008 23:09:57 +0000

good in a sense it makes changing gear smoothly and fuel efficiency…