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

[WasserGKuehlt]

looked a little deeper: I’m sure the brakinging control is the same as a design I was involved in. The forum has somebody with inside information ? I also understand why the pedal feelis not so good just before you stop. . . . .

You are probably right regarding the insider: the link points to a US gov't agency, and so it must have been filed by an authorized entity (ie someone on behalf of Audi ;-)).

Sponsored

 

[whitex]

It is standard equipment - at least in the US market. (Listed under E-mobility.)

Yea, I see it in standard equipment for my build (thought of course there is also a CYA asterisk

* All information is subject to change without notice. Neither Porsche Cars North America, Inc. (PCNA) nor the manufacturer can accept
liability arising from the use of any information contained herein.

That said, I remember reading in some Porsche documentation for MY2020 that not all Taycans had the heat pump option.

 

[rs38]

that's true, in Europe you have to pay 850 bucks (even in the Turbo S) to get the 3 valves making the heat pump work.

 

[Gwaihir]

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.

 

[rs38]

IMO this is illustrating the situation where battery needs cooling, while the cabin needs heating. The heat pump function is meant to recycle any heat available in the system, rather than dissipating it to the environment and heating independently. This can allow the car to retain heat energy, hence be more efficient.

yes this is the obviuos function, but the classic situation in the winter is like:

7°C outside, everything is 7°C cold: battery, e motors+inverters, interiour.
now I want 20°C inside and battery also likes it warmer. What to do? Use the heat pump to make the battery+motors even cooler? no

1.Use the heat pump to get energy from the outside air with an efficiency of >250%?
2.Use the 10kW aux heater with an efficiency of 95%?

I think it's only 2.

 

[whitex]

that's true, in Europe you have to pay 850 bucks (even in the Turbo S) to get the 3 valves making the heat pump work.

Interesting. I sometimes wonder how they choose the default options for different countries. I once compared options between UK and US, noticed not only different included options, but also options not available in one region (eg. privacy glass not available in the US, neither is metal roof for any CT), or the very same options costing a as much as 2x more than in the other region (I don't remember which one it was, but remember thinking "I am paying 2x the money for the same option!"). My guess is it's all about profit maximization for each region. Some of it could be just taking out options which everyone will buy anyways, but allows the base price of the car to seem lower. Maybe heat pump in EU is like 150KW DC charging in US, pretty much everyone specs it, if not per their own research, per their SA advice.

 

[whitex]

yes this is the obviuos function, but the classic situation in the winter is like:

7°C outside, everything is 7°C cold: battery, e motors+inverters, interiour.
now I want 20°C inside and battery also likes it warmer. What to do? Use the heat pump to make the battery+motors even cooler? no

1.Use the heat pump to get energy from the outside air with an efficiency of >250%?
2.Use the 10kW aux heater with an efficiency of 95%?

I think it's only 2.

According to Porsche, the Taycan heat pump function is supposedly intended for operation between -17°F and +40°F (-27°C and +4°C). My guess is when driving in the winder at -7°C, there can still be surplus heat from the battery. Maybe not when you first power up, but once the battery is at its intended temperature (which depends on your driving mode).

 

[rs38]

did you already had the chance to observe this behavior in the Taycan with OBD scanner?
I did it a lot in the last months and the thermal strategy is not really clear to me
It can get very strange in some cases, using aux heater when you would never expect it etc.

and like always: the linked doc is not free of errors, so they claim to use only ferrite magnets in the e machines...

 

[YLA G]

It is standard equipment - at least in the US market. (Listed under E-mobility.)

The heat pump is an option in Europe

 

[whitex]

did you already had the chance to observe this behavior in the Taycan with OBD scanner?
I did it a lot in the last months and the thermal strategy is not really clear to me
It can get very strange in some cases, using aux heater when you would never expect it etc.

and like always: the linked doc is not free of errors, so they claim to use only ferrite magnets in the e machines...

Sadly, my Taycan is still in factory planning stages. My latest TYD production date is in January now, but it's moved before so it might move again - my build froze and thawed twice already even though I made zero changes since submitting it. All my information is from research I've done online and some hands on playing with second hand Porsche parts I picked up on ebay. My current area of interest lies mostly in the infotainment, instrument cluster, and OTA electronics and their cybersecurity. Other areas such as heating/cooling/BMS strategies is just auxiliary, passive learning as I come across it, but not actively planning to experiment with it (at lest for now).

 

[Scandinavian]

yes this is the obviuos function, but the classic situation in the winter is like:

7°C outside, everything is 7°C cold: battery, e motors+inverters, interiour.
now I want 20°C inside and battery also likes it warmer. What to do? Use the heat pump to make the battery+motors even cooler? no

1.Use the heat pump to get energy from the outside air with an efficiency of >250%?
2.Use the 10kW aux heater with an efficiency of 95%?

I think it's only 2.

I believe the same. I do not think the heat pump is taking the energy from the outside air, which I had expected, but rather from het in the electrical systems, battery, motors, inverters etc.

Looking at the descriptions on the configurator, it is in line with your thinking.
Strange way to use a heat pump! I would have thought that the heat pump had been designed with a capacity to at least heat the interior from outside air.

 

[Scandinavian]

And I do not have it in my configuration and now I do not miss it all.

 

[f1eng]

Wow it's wild to see how fast the torque drops at high rpm. The achilles heel of EVs?

The torque curve of an IC engine is (much) worse, hence the need for multiple ratios rather than just one, or the two that Porsche (expensively) specify. It is a good engineering solution but not one most makers are prepared to spend money on since they can get away without it. IMHO

 

[f1eng]

that's true, in Europe you have to pay 850 bucks (even in the Turbo S) to get the 3 valves making the heat pump work.

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

 

[whitex]

The torque curve of an IC engine is (much) worse, hence the need for multiple ratios rather than just one, or the two that Porsche (expensively) specify. It is a good engineering solution but not one most makers are prepared to spend money on since they can get away without it. IMHO

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

Sponsored