📒 Exhaustive documents of J1 platform Audi E-tron GT / Taycan [250 pages of detailed technical information]

[rs38]

afaik worse efficiency and reliability?!
Audi had bad experience with this as well.
If you do not need 10.000 NM wheel torque and 300 kph, a single speed transmission should be fine after all.

Standard in the UK, which is in Europe despite the wishes of our more politically extreme citizens

next time I say "EU"


regarding heat pump I am quite sure that even Tesla's Octovalve super-duper heat pump is not really working with extracting energy from air but somehow generating heat with internal pumping at the same effiency or COP of 0.95 like the aux heater.
Same was true with the heat pump in the VW ID.3 which was nicely tested by some youtubers.

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[f1eng]

I always wondered why Taycan didn't use a continuously variable transmission, which is not a new technology.

Not new but it is heavy, very expensive and not that efficient.

On an IC engined car it makes perfect engineering, but not economic, sense, except the solution Toyota patented for their hybrids which is truly brilliant IMO, light simple and efficient.

When we started work at Williams on a CVT for Formula 1 in around 1984/5 the calculation showed a 12 speed fixed ratio 'box would be needed to match it. It took until 1993 to develop a reliable version that worked and the other teams lobbied the FIA to ban it frighted they would all have the expense and lost period of competitiveness so it was banned in 1994.
Williams had invested a fortune and 10 years working on it.
For F1 nerds the first test rig was designed and built by myself and Ross Brawn (now MD of F1 he was my R&D technician back then).

The power curve of an electric motor means that a longer ratio is only really needed for high speed cruising, which isn't allowed in most countries, so whilst the Porsche 2-speed rear transmission is a big improvement on a single ratio for autobahn driving it is probably of only paper interest in most countries so most manufacturers save money and weight by not bothering.

 

[f1eng]

next time I say "EU"

 

[whitex]

regarding heat pump I am quite sure that even Tesla's Octovalve super-duper heat pump is not really working with extracting energy from air but somehow generating heat with internal pumping at the same effiency or COP of 0.95 like the aux heater.

From everything I've seen, the Taycan heatpump was never intended to extract heat from the outside, only to retain heat already in the car (hence the intended operating temperature range of -27°C to +4°C). I would assume any inefficiencies of the heat pump system simply generate more heat, so they are not truly lost.

 

[Scandinavian]

If you do not need 10.000 NM wheel torque and 300 kph, a single speed transmission should be fine after all.

Rimac Nevera was planned to have a two stage gearbox, but was later redesigned with a single gear only, if I remember correctly. Since the VW group and Porsche have a stake in Rimac, we might see developments in this area for the next generation.

 

[Mr.Smith]

Looking a little closer in the documentation I spotted the matrix LED lighting. That was interesting. So we purchase the best lights then have functionality reduced ready for FOD charge and update to enable something we have purchased. Very Porsche in concept. . . . Saying that it will bite their arse.

I’m getting fed up will the way they continuously prise money out of the customer. If they think I’ll pay a subscription they can think again.

My GTS is their last chance. Like the rest of the world, it could be followed by a Tesla. Most of us know what’s happening in Europe, the UK, America. Big disruption that is sure to get bigger.

This was the reason I got the RS E-Tron GT instead of a Taycan Turbo.
The way Porsche does business doesn't sit right with me.

In the US the E-Tron GT matrix led lights don't have full functionality due to regulations.
There is a way to unlock them, but all the modules are Porsche, not Audi.

 

[Mr.Smith]

Not new but it is heavy, very expensive and not that efficient.

On an IC engined car it makes perfect engineering, but not economic, sense, except the solution Toyota patented for their hybrids which is truly brilliant IMO, light simple and efficient.

When we started work at Williams on a CVT for Formula 1 in around 1984/5 the calculation showed a 12 speed fixed ratio 'box would be needed to match it. It took until 1993 to develop a reliable version that worked and the other teams lobbied the FIA to ban it frighted they would all have the expense and lost period of competitiveness so it was banned in 1994.
Williams had invested a fortune and 10 years working on it.
For F1 nerds the first test rig was designed and built by myself and Ross Brawn (now MD of F1 he was my R&D technician back then).

The power curve of an electric motor means that a longer ratio is only really needed for high speed cruising, which isn't allowed in most countries, so whilst the Porsche 2-speed rear transmission is a big improvement on a single ratio for autobahn driving it is probably of only paper interest in most countries so most manufacturers save money and weight by not bothering.

The 2 speed transmission really shines at higher speeds. I cruise at 90mph and have plenty of power on tap when I need it with 590hp.

Contrast that with a Tesla P100D that has more HP, 18000 rpm, that dies at 130mph.

I assume the only solution to a 2 speed transmission is additional motors and more HP?
Nevera has 4 motors, Plaid 3

On another note, what are your thoughts on the Carbon sleeved rotor solution?

 

[f1eng]

I assume the only solution to a 2 speed transmission is additional motors and more HP?
Nevera has 4 motors, Plaid 3

It could be just a question of matching road speed to power curve by having one axle doing more work at low speed and the other at high. If there is enough surplus HP that may be a lighter solution than the gearbox Porsche use.

Making a correct engineering judgement needs the actual motor power curves to choose ratios to suit.
No idea what a carbon sleeved rotor is, electric motors themselves are not my field of expertise - trying to get the best out of the severely compromised power unit that is the IC engine is where I have decades of experience

 

[rs38]

you have to ff the marketing to see the shitty Tesla Motor and the Taycan beauty this
and either there is another Lucid video where they cut the Plaid rotor.

 

[Dee]

the shitty Tesla Motor

If you call Tesla's motors "shitty" you don't know anything about their electric motors.
It's a masterpiece in terms of efficiency, shear power, electronics and overall design.
No, not a Tesla fan but I do admire their engineering.

 

[Mr.Smith]

If you call Tesla's motors "shitty" you don't know anything about their electric motors.
It's a masterpiece in terms of efficiency, shear power and design.
No, not a Tesla fan but I do admire their engineering.

If Teslas is a masterpiece, how would you describe Taycans and lucids?

 

[Dee]

If Teslas is a masterpiece, how would you describe Taycans and lucids?

Defenately not "shitty" either. ?

 

[rs38]

"masterpiece" ?
deceptive marketing is obviously similar effective as their motors

but back to facts please

 

[ben1]

Does anybody have access to the workshop manual ?

 

[Dee]

"masterpiece" ?
deceptive marketing is obviously similar effective as their motors

but back to facts please

Obviously you've never heard of Munro Live.
Great vids about all kinds of EV stuff, teardowns and reversed engineering.
Stop being biased.

https://youtube.com/c/MunroLive

I'm still waiting for a teardown of a Taycan...

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