Renault Power Unit Hardware & Software

[Blackout]

I think you'll find that the carbon fibre is the forward end of the gearbox where it mounts to the engine. The gearbox will have cutouts in the side, for the exhausts to go through, and the top, to clear the turbo.

No I dont mean the gearbox casing : D I mean the turbine it-self, which has a wastegate at its top, looks to me to be shrouded in a CF disc shaped thing (under the silver heat shield), which also looks a bit twisted... Do you mean that is just dark metal like the pics below?

[wuzak]

I think you'll find that the carbon fibre is the forward end of the gearbox where it mounts to the engine. The gearbox will have cutouts in the side, for the exhausts to go through, and the top, to clear the turbo.

No I dont mean the gearbox casing : D I mean the turbine it-self, which has a wastegate at its top, looks to me to be shrouded in a CF disc shaped thing (under the silver heat shield), which also looks a bit twisted... Do you mean that is just dark metal like the pics below?

Yes, I think it is just dark metal.

[bergie88]

Nice pics! What a huge turbine if you imagine that this is just a 1.6L engine . Also the compressor is quite big I think, but that's quite difficult to see.

[Blackout]

In 2014 too, the STR had a wastegate on top of the turbine while the RBR had none... odd
And it seems compressor and turbine, both have a single entry.
RBR 2014: (cant find the rest of this scan. Edit here it is http://www.f1technical.net/forum/viewto ... =4&t=21149)

[Blackout]

2014
2015
MGUK is huge

[Facts Only]

I think you'll find that the carbon fibre is the forward end of the gearbox where it mounts to the engine. The gearbox will have cutouts in the side, for the exhausts to go through, and the top, to clear the turbo.

No I dont mean the gearbox casing : D I mean the turbine it-self, which has a wastegate at its top, looks to me to be shrouded in a CF disc shaped thing (under the silver heat shield), which also looks a bit twisted... Do you mean that is just dark metal like the pics below?

Yes, I think it is just dark metal.

Its carbon fibre, tooled to fit around the back of the turbine as a heatshield, the side facing the turbine is coated with Zircotec (or similar) like this:
http://www.zircotec.com/page/--thermal-protection/145

[Abarth]

That style of wastegate port would allow significant blowdown gas to impinge on the turbine with minimum backpressure during qualy mode. A bit like a Pelton wheel.

That's what I believe too. And if there is need for more torque to reach required charge air pressure, MGU-H comes in as motor.

Remember how Honda film shows the engine, but the turbine is always blurred. Must be an important part of turbine design, to optimize this behaviour.

[hurril]

That style of wastegate port would allow significant blowdown gas to impinge on the turbine with minimum backpressure during qualy mode. A bit like a Pelton wheel.

I can't seem to understand how this would be.

[Long term F1 Fan]

Interesting plumbing. Current layouts invariably seek to minimise length of the exhaust plumbing to the turbine (to preserve heat energy). I guess because the early turbines were limited to much lower turbine inlet temperatures.
Also because aircraft applications are less sensitive to transients. Long pipework takes a few seconds to heat up when transitioning from light load to full power with dreadful turbo lag being the result.

The exhaust plumbing is not very long on the Renault, (still longer than the Merc and Honda) but charge air plumbing is ridiculously long

I couldn't agree with you more on the length of the charge air plumbing. To me it really seems this is where Renault got it all wrong and for what ever reason they don't seem to be willing or able to changing the layout (pride?).

As we all know Mercedes, Ferrari and even Honda have opted for a much more direct and shorter charged air plumbing path which makes an enormous amount of sense from an efficiency standpoint -no other manufacture has adopted this layout for good reason.

Just looking at the length of the Renault setup I just can't imagine they can feed enough charged and cooled air at a reasonable amount at both low and high revs. It would seem the engine would simply run out of efficient airflow especially at high revs as the air would just simply take too long to reach the intake manifold and would probably be down on boost pressure and up in temperature.
From what I understand and read they seem to be more focused on improving the combustion process of their engine (redesigning the combustion chamber) rather than redesigning the layout. I understand that they probably have a limited budget which limits how much they can spend but I would think this would be their first priority as it would seem there is low hanging fruit to be had in terms of horsepower and efficiency. Why try to build upon this concept when after two iterations (2014 and 2015 engines) it is still considerably down on power?

Any thoughts?


http://www.servimg.com/view/14795526/1811
http://img1.auto-motor-und-sport.de/Red ... 850225.jpg

https://pbs.twimg.com/media/COI6alrUwAITG6C.jpg:large

[motobaleno]

http://www.omnicorse.it/magazine/65233/ ... n-red-bull

renault separation from red bull is final

ghosn has spoken.

[ringo]

The wastegate on the STR is not built into the top of the turbine.
What you are seeing are two pipes from the exhuast headers that join at a point on top of the turbine.

Like this:
.._|_
/.....\
|_O_|

[toraabe]

http://www.omnicorse.it/magazine/65233/ ... n-red-bull

renault separation from red bull is final

ghosn has spoken.

I really hope that they will buy Lotus and come back as a full competitive works team.
Since Renault needs F1 and F1 needs Renault. One of the most competitive engine manufactors in F1 history.
Remember the Renault RS series. Together with Williams and Red Bull until 2013. And do not forget the Renault Gordini engine . What I can say more or less is that Red Bull and Toro Rosso have treated Renault really bad the last two years and I understand that they will pull out. Who wants to put thousands of working hours and do your best, when only critisizm is recieved. Then it is better to pull the plug and to come back even better as Renault F1 team .

[djos]

Oh c'mon, RedBull have every right to complain as Renault have clearly screwed up big time.

However I lay the blame squarely at the feet of the FiA who put in place an incredibly unreasonable operational framework including the penalty system, especially for season 1!

[wuzak]

Oh c'mon, RedBull have every right to complain as Renault have clearly screwed up big time.

Maybe if RBR thanked them for the 4 titles Renault helped win?

[djos]

Oh c'mon, RedBull have every right to complain as Renault have clearly screwed up big time.

Maybe if RBR thanked them for the 4 titles Renault helped win?

The only time RedBull complained about the V8 was when Renault stuck to the spirit of the development freeze agreement and ended up down on power compared to Ferrari and Mercedes. They weren't attacking Renault, they were lobbying the FiA to allow Renault to catch up.

Both Seb and Mark praised the Renault V8 from the podium frequently.

Some you folk need to stop revising history!