Bi-turbo in the VW? Is that okay?

Hello.
I read in a German automotive magazine that BMW is developing a diesel engine with...
Doubleturbo has developed. According to the newspaper article, the principle of operation is:

BMW achieves this record-breaking performance primarily with a two-stage turbocharging system: A small, lightweight turbocharger spools up quickly, practically from idle speed; a larger turbocharger kicks in at higher RPMs and provides maximum power.

A more precise description would be that the smaller turbocharger immediately results in...
The system has a base level of power, and then the larger turbocharger kicks in. The smaller turbocharger disengages around 3000 RPM. Everything is controlled via the engine speed using vacuum sensors.

Is it possible to retrofit something like that to a TDI engine, or is it even conceivable?
It's going to involve a lot of crafting and screwing! But what hasn't already been done or modified?!

Best regards, Klima96.

You probably read about 'register loading' here:

I am sorry, but I cannot access external websites, including the one you provided. Therefore, I am unable to translate the text from the German website into English.


Regards!

Yes, that is certainly possible...
Have fun building, because aside from the extremely limited space and a lot of new technology, you also have to somehow teach the MSG (presumably a system or device) that there are now more things to control. Furthermore, this control is only achievable through electronics, not mechanically.

By the way, register charging was also implemented in the legendary Porsche 959.

Doesn't the Opel OPC diesel also have a two-stage turbocharging system?

While this isn't a technical journal, it does provide some information.
I am sorry, but I cannot access external websites or specific files online. Therefore, I am unable to translate the text from the provided URL.

m;

EDIT: As far as I know, register charging is not referred to as "Bi-Turbo."
I only know "Bi-Turbo" as "two turbos," typically with one turbo per bank of cylinders, like in the RS engines from Audi.

m;

Unfortunately, BMW didn't offer Registerturbo this summer. We would have liked to try it out in a new E60, just for fun, but it wouldn't have made sense for a diesel engine considering the mileage on the car. So, we ended up with a simple, reliable 3.0-liter gasoline engine. My father can't really handle a diesel engine, and the 3-liter diesel is too sluggish for him at lower speeds anyway.
Perhaps that's a good thing. I don't want to know how the guesswork involved in troubleshooting a rotary injection pump works (especially when it's new territory for the workshop).
In my opinion, Opel also has electric turbocharging in the pipeline (weren't they even a bit ahead of BMW in this regard?).
Well, if they ever offer the engine in a 3-series, it might be used for testing. However, the car itself will likely be quite expensive. The contract for the E60 expires in June, but the new 3-series (especially with that engine) will almost certainly be released much later. Then you have to see if it's worth taking on the 5-series (it will likely still cost a good amount of money after a year, and it's probably not going to be easy to resell due to SMG).

If anyone ever gets the chance to test drive one of those organ-like vehicles, please let me know!

Here in Hamburg, it used to be quite difficult to get access to these cars. BMW already had a problem putting together a random car with SMG for test drives. Finding a 5-series without active steering or Dynamic Drive was practically impossible. I always find it annoying to spend a lot of money on things without being able to test whether you actually "need" them. Right now, I unfortunately don't have the time to take care of a car. Also, the dealership in Hamburg already knows that, as of this year, company cars are no longer being delivered by them, but rather from Konstanz. Consequently, there has been a noticeable decrease in the willingness to accommodate special requests regarding test vehicles.

Okay, enough talk. If something like that ever happens with the smaller engines, I'll definitely be involved. The principle isn't new, and with the regulations available today, it's certainly something that can be managed well. I'm definitely always in favor of getting away from all this VTG trouble...

Regards,

Olaf.

Okay Martin, you're right. Bi-turbo means two identical turbos, while twin-turbo refers to two different turbos used to generate pressure more quickly. I've also read about it in relation to the OPC diesel. The Fiat 500 is available for purchase, but I believe the Opel version is not yet on the market, or am I mistaken?
The Porsche guys actually had that technology 15 years ago...although it was in a gasoline-powered car (what else would you expect).

Well... I also think that with transversely mounted engines, like in a Golf, there isn't much space behind the engine to fit two turbos. It's easier with BMW because they have a 6-cylinder engine, but it's not mounted transversely; there's a lot of space next to the engine. However, I think BMW will only use this technology with larger engines, because it's difficult to get good performance at lower RPMs with a large turbo.

"Certainly, the concept of increasing engine displacement makes the most sense. I also believe that the 1.9-liter engine, for example, in the ARL model, already represents the maximum potential for a standard production engine. If people still feel the need to chip it, then everything is pushed to the limit." If you were to then implement a register charging mechanism, however you might do it, I wonder which component would be able to handle it?

There's probably very little space for another turbocharger.
However, in the photo accompanying the article about the BMW with twin turbochargers, the entire turbo unit doesn't appear to be very large. (Autobild)

I don't think it's about a significantly greater amount of power, but rather, as BMW advertises, about achieving that power much earlier than with the TDI PD engine.

My turbo kicks in around 1800 RPM. If I were to use a smaller, lighter loader that would start applying pressure earlier, everything would be fine.

"It says right there that you have 114 kW, what more do you want? It's not going to work. If BMW builds something like that, they've planned it and made it super compact." Just imagine all the intercooler piping that would have to fit in that small space, plus the exhaust and the turbos!

If you need more power, the 535d might be the model for you.

The OPC Diesel (with 212 horsepower) is a modified 1.9-liter common-rail diesel engine from FIAT.

Best regards, WarLord.