Comments on: Porsche patents dual-clutch gearbox design

By: Volvo and Ford to develop own DSG

Volvo and Ford to develop own DSG — Mon, 06 Nov 2006 02:53:55 +0000

[...] Volvo and Ford are developing their own version of a dual clutch gearbox, following the footsteps of Porsche and Mitsubishi who are executing similiar plans. Mitsubishi’s upcoming successor to the Evolution line of rally turned tarmac monsters – the Evolution X, will feature a twin clutch automated gearbox, and Porsche has recently filed patents for their 7-speed dual clutch gearbox design. [...]

By: silverfish

silverfish — Thu, 27 Jul 2006 11:39:31 +0000

It'll be a sad day when the old fashion manual is gone. Nothing beats the feeling of shifting the cogs yourself, learning to shift smoothly and getting it just right. All part of the joy of driving.

Regardless of how good these fancy gearboxes are, I'd still ike to see manual boxes around.

By: raybrig85

raybrig85 — Thu, 27 Jul 2006 07:26:43 +0000

really amazedla wit the german…they are a way ahead in term of tech…hhmm…with the dsg mode….when changing the gear…u say…had a pre selected thing and no loss in speed…hence…no jerking too aite???it will b really smooth when changing the gear…

By: tbcheese

tbcheese — Thu, 27 Jul 2006 07:24:48 +0000

I don't know if they select the next gear immediately after engaging the current one but personally I don't think it'll be selected until the most probable next gear can be determined by reading the engine speed, throttle position etc cos it doesn't necessarily have to shift up as downshifting is an option too.

By: SatriaGuy

SatriaGuy — Thu, 27 Jul 2006 05:09:43 +0000

I'm not so sure(tbcheese help me out on this) but I think DSG(or S-tronic or whatever they choose to call it) works like this: while a gear selected (let's say 1st) the second gear is pre-selected at the same time. This way, there's no loss in speed when you actually select second. The same goes for the rest of the gears(2nd, 3rd is on, in 3rd, 4th is on etc).

But I wish all performance cars incorporate behind steering pedal shifts as standard. More fun to engage and faster to shift as well.

By: honda_driver

honda_driver — Wed, 26 Jul 2006 21:16:07 +0000

porsche used DSG way before VW did.

they didnt rush to implement in their previous line up of cars, because their customers didnt require it. they are doing it now probably to keep up with the times. besides, their customers are totally different than VW customers, and have different needs.

By: szw

szw — Wed, 26 Jul 2006 20:58:06 +0000

after vw done it 4 so long , porsche oni wanted to do , would it abit too late d ?

By: honda_driver

honda_driver — Wed, 26 Jul 2006 17:35:57 +0000

i read in evo magazine that porsche were the first people to use DSG in a practical application on their 956 group C endurance race cars in the 80's.

those cars run longitudinal gearbox layouts. so its not something new to porsche at all.

porsche claims to have not rushed DSG for their cars because they believe nothing beats the feeling of a pure manual+clutch.

By: tbcheese

tbcheese — Wed, 26 Jul 2006 16:00:31 +0000

No idea about the wear and tear. Haven't heard of anyone needing to replace the clutch yet. But initially there were complaints of the car stalling at traffic lights.

I'm just a tech geek interested in the witchcraft that makes things work. Haven't had a chance to test drive one. =)

BTW Paul. I had a friend who went down to London for the British Int'l Motorshow. I was supposed to go too but something came up. Anyway he got some photos. Would you like me to send some to you after I collect them?

By: redragon

redragon — Wed, 26 Jul 2006 15:18:03 +0000

Thanks tbcheese. Would you know if these twin clutches will run out as in the clutch of any manual gearbox? I have tried the DSG of the gti, it's really smooth and quick, can't help imagining what it would be like in the 997 turbo.

By: tbcheese

tbcheese — Wed, 26 Jul 2006 13:32:02 +0000

Yes it is the DSG. They renamed it S-tronic when they launched the new TT.

By: redragon

redragon — Wed, 26 Jul 2006 12:53:12 +0000

I think the Audi's S-tronic is not DSG. Audi will be using the DSG with their new TT.

By: e-nabilll

e-nabilll — Wed, 26 Jul 2006 11:59:18 +0000

notorpkcuf thnx

By: notorpkcuf

notorpkcuf — Wed, 26 Jul 2006 10:07:22 +0000

Here E-nabill http://en.wikipedia.org/wiki/Direct-Shift_Gearbox

By: e-nabilll

e-nabilll — Wed, 26 Jul 2006 03:26:08 +0000

anybody has a link on how exactly the DSG work?

By: tbcheese

tbcheese — Wed, 26 Jul 2006 01:47:17 +0000

Sorry mate. individual electric motors has been done too ;p

By: SatriaGuy

SatriaGuy — Wed, 26 Jul 2006 00:53:00 +0000

I wonder if this is a sign that the life of a simple manual gearbox is coming to an end?

What's next? Individual electric motors inside wheels? Aarghh!

By: tbcheese

tbcheese — Wed, 26 Jul 2006 00:46:59 +0000

It would be interesting if it was a variant of the DSG design. At the moment, the DSG is only offered on transverse engined cars with the Veyron being an exception. Don't know what's keeping them from putting them in longitudinal engined cars. So this would show that it is in fact possible. And if they can put it in the 911 turbo then surely its not a matter of too much power/torque like in the case of CVT transmissions.

By the way, the term Porsche Doppel Kupplung has been around for a while. Not sure if this is the official name for it.