DSG Auto Programme - Not Very Good

[CrispDust]

hmmm my reply post wasn't put up!
Munky when you have just handbrake on (whether flat uphill or down hill) the DSG clutch slips which must cause massive wear of the clutch plates. It only releases if you have footbrake pressed. Why doesn't handbrake have switch like footbrake

 

[flakmunky]

Are you using your left foot on the brake pedal?!

I know the TDi (and TFSI) are 'fly-by-wire' but if you are holding the car with the handbrake that is wrong and will cause premature wear of the clutch.

There is no difference with the DSG implementation between TDi & TFSI cars. Everything you describe would happen with a TFSI - but I personally wouldn't drive my car the way you describe.

The footbrake can 'act' a little like a clutch at junctions; if you release the brake slightly so the car is trying to creep forward by the time you plant your foot on the Go pedal the car will be ready to go...

Anticipation is your friend...

As for the ecu cutting the throttle when your foot is on the brake - thats how you do launch control! It limits the revs to 3000 rpm and maintains this rpm... Until you release the footbrake when it then 'drops' the clutch.

You definitely don't want to be holding it back with the handbrake only. You will wear the clutch out prematurely. Why do you think the brake pedal disengages the clutch?!

 

[flakmunky]

Why doesn't handbrake have switch like footbrake?

I don't know, I didn't design the DSG! But if pressed I would think it is for if you are on a very steep hill you can release the footbrake, releasing the handbrake at the point where the car is balanced and ready to move off.

 

[Robdrums]

In an ideal world should we put it in Neutral if stopped? I am concerned as well about premature brake wear, not just the clutches.

Rob

 

[CrispDust]

But normal driving practice is to put handbrake on when stopped at say, lights, in case of rear end shunt, which could knock your foot off brake pedal shunting you forward.
Just to complicate matters my Alfa tiptronic autobox will hold car still on hill up to 1 in 6!

With all the sensors, surely car should know that it is stationary and handbrake on and idle revs so disengage clutch-hill start will require some revs. so slip clutch when revs applied, not all the time.
Guess its just one of those weird things.

 

[Maximus2000uk]

I almost always put mine into Neutral when at traffic lights

 

[flakmunky]

I almost always put mine into Neutral when at traffic lights

Handbrake and Neutral for me too at lights.

Been testing mine at junctions this weekend and basically by the time you take your foot off the brake pedal and on the accelerator the car is ready to go - no delay for me...

So I wonder if Gary is experiencing TDi turbo lag?!

 

[cuprascott]

Flak - Although the gearstick is labelled + and - I think Hugo's taking about the movement.

I also think that the stick is the "wrong way round" Look at motorsport - pushing the gearstick forwards downshifts not upshift as it does with the DSG (wonder if I could rewire that?).

I beleive the reason for this is that PORSCHE has patented their tiptronic design functionality in that you pull it back to go up the box and push it forward to go down the box. Therefore any other manufacturer that wants to setup their semi auto boxes the same needs to pay PORSCHE royalties!

 

[flakmunky]

If that is what Porsche patented then their Patent Attorney should be fired. Any decent Patent Attorney would not have made the claim as explicit as that; they would have claimed that moving the lever changes gear... Otherwise it would be such an easy patent to bust and Porsche would have wasted their money filing the worldwide patent!

I found this Porsche patent DE102005062298 which pertains to a "Selector Device for a Transmission" and which sounds exactly like the DSG gear box. The diagrams do show a + and a - the other way round to 'ours' but this is explained in the text as being "one embodiment of the invention".

Anyway, interesting reading...

But don't forget Porsche are almost majority VAG share holders...