Electric Superchargers - How Audi Is Eliminating Turbo Lag

How Do Electric Superchargers Work?

The Audi SQ7 is powered by a 4.0L sequential turbo diesel V8. It's good for about 435 horsepower and 660 lb-ft of torque, which is great, but the fun doesn't stop there. In order to eliminate unresponsive nature of turbocharged engines, Audi has fitted the car with an electric supercharger, the first in a production vehicle.

This means adding an onboard 48V system that can handle the additional power requirements of the electric powered compressor (EPC), which at full throttle can produce 7 kW of power, enough to spin the compressor wheel up to 70,000 RPM in just a quarter of a second. Full details of how this system works in the video, as well as animations.

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[chrisperez]

I just woke up and still tired, I think my body knows how important EE is for the mind

[FullyAdamatic]

Cooling fan from my Dell PC tower, got it Jason.

[jjpb]

I have a love hate relationship with EE videos. Love them because they’re so interesting and Jason is great at presentation and explanation. Hate them because they make me wish I’d pursued engineering and done something I’m interested in rather than real estate where I spend my days in an excel nightmare😏

[TheAtb]

0:13 when my boss prints an email, then brings it down to me in person and tells me what to reply back, instead of replying himself directly.

[Sandy-oylr]

One DOES NOT want to BUY a car with that. One wants to LEASE. Because when the warranty is up, repairing something like that has got to cost a small fortune...And I wouldn't be surprised if a lot of that stuff was so buried under other things, it'll take a day just to get to what failed.

[kenzo]

I like this guy he explains things so well

[KRAUSER]

Supercharging the turbocharger to eliminate turbo lag. Yep, that's the German engineering. :D

[jamescaley]

So two turbo chargers + super charger + generator +++

What could possibly go wrong?

[chris_sndw]

I did a vocational qualification plus a German master certification in car mechanics many years ago. These videos are better than anything my teachers provided. 😅

[hohepaodonnell]

Thanks Jason, it's great having these complex systems explained in an easy to understand manner.

[jospi]

What could go wrong? The perfect car for Tavarish in a few years.

[exedracs]

Another well put together video as always. Never bores me watching your content mate.
Always fascinates me how the technology in engines is evolving.

[StaticJaFilms]

You have taught me alot.. continue with the amazing content.

[erijavec]

When this thing is 12 years old, it will embody someone’s nightmare. Awesome video 👏

[thetabletnonya]

Why would they add the weight and complexity of adding a 48v battery and not just go the rest of the way and make it a hybrid?
German engineering, if it isn't broken, it isn't complex enough...

[andrewhallett-patterson]

The engineering is very impressive, cutting edge and detailed but the complexity of the complete system is a major component failure waiting to happen, especially as the vehicle ages. Great vid as usual. 👍👍

[starvalkyrie]

I guess if you buy a high powered luxury SUV you're probably not the sort to worry about repairs.

[gregsimpson]

I liked this video explanation. This is a 4 litre biturbo V8 with an additional electrically driven compressor. All good. I have the twin turbo 3 litre diesel which probably suffers less form turbo lag than the V8 as there is less inertia. The first (smaller) turbo has variable vanes and feeds the engine initially and then approaching mid range simultaneously feeds the second larger turbo. Both turbos operate through the mid range and in the upper range the secondary larger turbo is the main provider of compressed air. Audi produced a very descriptive document on the various rev phases for this motor. If it did have a turbo lag, I resolved it by reprofiling the ECU through Superchips and that not only increased the torque and power (600 to 750 and 235 kw to 280kw) but the throttle response is almost instant AND it is more fuel efficient. That motor is now dropped (emissions?) and the new 3 litre diesel is now a single turbo with an electric compressor. It is also 'mild'hybrid. I suspect unless the single turbo is super responsive that there will remain measurable turbo lag. Also I suspect the torque curve (although a max of 700 now)is not very flat and that high figure will be a short duration. Your thoughts..?

[briansmobile]

Did I see a Valeo brand stamp on that?

[crackedemerald]

Eletronik
_Eletronic_
Rotor
_Rotor_
*KÜHLWASSERMANTEL*
_Water cooling jacket_

Man, i love german