Garrett DualBoost Turbo

Aint sure if its been posted already

Interesting video, love learning about stuff like this

great find,

intresting though i would of thought that it was more suited to diesels with low down pick up and turbine flow,

also what stricks me that may be a issue is the uneven loads and balancing of compressor vs turbine , because affectivly they have geared the turbo 2:1 and extended the compressor shaft making for a week point as that shaft enters the first compressor chamber. i doubt they will be for high boost application (thuse pointing to diesels again).

but then again i dont studdy turbos just a lift engineer and the engineer in me says leverage is a powerfull weapon, just look at any turbo out there shaft play can be a issue and thats with our conventional compressor shaft which is half the size compaired to this configeration, this type of turbo may well be smashing compressor fins off and oils seels in next to no time.

im on the fence for this one until its been put through its paces

I watched the vid without sound, looks like they are basically running two compressors off one impeller? It's a great simple idea, and very compact as well. Not sure where it looks like it's geared 2:1, seems like a 1:1 shaft with no gearing to me, or am I oversimplifying something?

As it's got VNT is is indeed probably diesel only.

I can see this working. I imagine it will be a little while before we will see items suitable for our cars.

I watched the vid without sound, looks like they are basically running TWO compressors off ONE impeller? It's a great simple idea, and very compact as well. Not sure where it looks like it's geared 2:1, seems like a 1:1 shaft with no gearing to me, or am I oversimplifying something?

 

As it's got VNT is is indeed probably diesel only.

he he you said about the 2;1 gearing in your explaination

okay maybe not exactly gearing as such but still x2 the load/flow on the compressor side vs the turbine until wastegate boost is achived,

though as i said im not turbo specialist

maybe say a T67 compressor with a small turbine would be more of a gearing thinking about it , being the exducer on the compressor travels further then the exducer on the turbine.

well my head is ready to expload now so all i can say is i hope it works

I think I see what you mean, I'd consider it 2* the load rather than gearing. Otherwise running 4wd instead of 2wd would be classed as a 2:1 gear ratio?!

I'd imagine Garrett have put it through its paces and haven't built it out of soft cheese though

I think people are missing several points.

It *IS* designed for petrol engines, GASOLINE was mentioned many times in the video, and shown in the title!

It is designed mainly for small displacement engines.

It is designed to produce low levels of boost at low engine speeds, a modern day LPT (low pressure turbo).

It has no internal gearing.

Salient points are a reduction in exhaust gas back pressure V boost by using an axial flow turbine wheel. These need higher rpm levels to work efficiently, (think aircraft turbo prop engines). To allow much higher turbine wheel speeds without impacting the flow ratio of a conventionally sized compressor wheel Garrett use two small compressor wheels, spun much faster, these confluence into one scroll and feed the intake system as one.

It's unlikely to be of great interest to the performance engine builder. More to builders of high efficiency, high torque engines below 1 litre in capacity.

But nice technological advances from Honeywell Garrett!

Looks like a very simple yet clever idea

Looks like a very simple yet clever idea

The best ones always are!

The best ones always are!

Indeed, couldnt agree more

It *IS* designed for petrol engines, GASOLINE was mentioned many times in the video, and shown in the title!

In my defence I did say I watched it without sound (I'm at work). What I didn't say is I also skipped through to the explanatory animation so missed the text as well

I think people are missing several points.

 

It *IS* designed for petrol engines, GASOLINE was mentioned many times in the video, and shown in the title!

But will work on diesels

It is designed to produce low levels of boost at low engine speeds, a modern day LPT (low pressure turbo).

for that reason is why i surgested it for a deisel

but if you say that the axle turbine needs more flow then maybe not unless they go with a normal turbine and twin compressor for the diesel