Renault Power Unit Hardware & Software

[godlameroso]

Accumulator would be illegal as the only way of powering the wheels is the engine and MGUK

The accumulator could be used to run other systems such as water pumps, oil pumps and gearbox, which would save up some engine power

I wonder if a hydraulic braking regenerative system can be deployed on the front wheels to power engine ancillaries

If you have the accumulator geared to the MGU-K it's fine, look at the flow chart. In the end it would be the MGU-K powering the wheels not the accumulator. There's no rule that says MGU-K can only receive power from the ERS via the the CE, the MGU-H, and engine ancillaries are also up for grabs.

[godlameroso]

Red Bull 2017-2018 packaging comparison:
https://uploads.tapatalk-cdn.com/201804 ... c8ce6a.jpg
Note how much longer the 2017 exhausts are.

They really did an amazing job moving the cooling behind the engine like that, not to mention leaving a smaller overall footprint.

[godlameroso]

Didn't McLaren look at using hydraulic accumulators charged on engine deceleration for the hydraulic systems some time ago? I'm thinking MP4-19/20.

FiA poo poo'd the idea I believe.

It would make sense to have a variable swash pump which is active under deceleration (gear change/braking) to charge the accumulator from which pressure is drawn during acceleration for steering, gearbox, throttles and other actuators.

The only drawback I can see is packaging the accumulators.

make them part of the oil tank.

[ScrewCaptain27]

Red Bull 2017-2018 packaging comparison:

Note how much longer the 2017 exhausts are.

Turns out the one on the left is actually the 2016 car. So here are a couple of pictures of the actual 2017 car:


Not a huge difference compared to 2016, but the rads are way thicker than this year.

[GoranF1]

https://www.motorsport.com/f1/news/rena ... ssion=true

[MMMMMMMM]

Interesting article. Abiteboul estimates they are 0.4-0.45 off in terms of engine, which translates roughly in 30hp.
We know from official sources they started the season at >950hp, and Cyril just told us they brought 0.1s improvement in China, which leaves me thinking they must be at around 960-965hp as we speak.

[iichel]

do they also count gains in aero/cooling requirement (drag) as improvement in laptime or only power/torque output and optimisation in software?

[carisi2k]

Interesting article. Abiteboul estimates they are 0.4-0.45 off in terms of engine, which translates roughly in 30hp.
We know from official sources they started the season at >950hp, and Cyril just told us they brought 0.1s improvement in China, which leaves me thinking they must be at around 960-965hp as we speak.

Ferrari and Mercedes don't have 1000hp in race trim. Try about 970hp for them and then take off 40hp for the true figures for Renault. From what I understand the performance improvement for Canada is courtesy of some extra hp and a weight reduction from the new 2018 ers-k unit that was supposed to be the new 2017 ers-k unit.

[Wouter]

Interesting article. Abiteboul estimates they are 0.4-0.45 off in terms of engine, which translates roughly in 30hp.
We know from official sources they started the season at >950hp, and Cyril just told us they brought 0.1s improvement in China, which leaves me thinking they must be at around 960-965hp as we speak.

Renault started with 950 HP, but did not start using it immediately.
During the winter they got 30 HP more.
From testing in Barcelona they first used 15 HP during the races.
From Bahrain they started using the other 15 HP, but only in qualifying.
From now on they will use every race a little bit more of that second 15 HP.
They are not using yet the whole 950 HP in the races.
The use of the entire 950 HP still takes until the next engine change.

[godlameroso]

Interesting article. Abiteboul estimates they are 0.4-0.45 off in terms of engine, which translates roughly in 30hp.
We know from official sources they started the season at >950hp, and Cyril just told us they brought 0.1s improvement in China, which leaves me thinking they must be at around 960-965hp as we speak.

Renault started with 950 HP, but did not start using it immediately.
During the winter they got 30 HP more.
From testing in Barcelona they first used 15 HP during the races.
From Bahrain they started using the other 15 HP, but only in qualifying.
From now on they will use every race a little bit more of that second 15 HP.
They are not using yet the whole 950 HP in the races.
The use of the entire 950 HP still takes until the next engine change.

How much torque does it make? ~405ft/lbs peak?

[iichel]

950hp at 11.500rpm will give you about 550Nm of torque, I guess it will have a bit more torque at even lower RPM but it's hard to say.

I found this image somewhere on the forum, but keep in mind it's a very rough estimate.
viewtopic.php?t=9259&start=8550#p640816

[godlameroso]

950hp at 11.500rpm will give you about 550Nm of torque, I guess it will have a bit more torque at even lower RPM but it's hard to say.

I found this image somewhere on the forum, but keep in mind it's a very rough estimate.
viewtopic.php?t=9259&start=8550#p640816

http://www.formula1benzing.eu/index_cli ... 2_0083.jpg

Torque on boosted cars usually follow the boost curve, however I'm not sure peak torque happens at 11,500rpm, or even at 10,500, probably at lower engine speed.

That estimate is of the 2016 season, I wonder why the author hasn't made one for this year.

[MrPotatoHead]

950hp at 11.500rpm will give you about 550Nm of torque, I guess it will have a bit more torque at even lower RPM but it's hard to say.

I found this image somewhere on the forum, but keep in mind it's a very rough estimate.
viewtopic.php?t=9259&start=8550#p640816

http://www.formula1benzing.eu/index_cli ... 2_0083.jpg

Torque on boosted cars usually follow the boost curve, however I'm not sure peak torque happens at 11,500rpm, or even at 10,500, probably at lower engine speed.

That estimate is of the 2016 season, I wonder why the author hasn't made one for this year.

Peak torque is unlikely to happen under 10,500 because of the fuel flow limitations.

[godlameroso]

950hp at 11.500rpm will give you about 550Nm of torque, I guess it will have a bit more torque at even lower RPM but it's hard to say.

I found this image somewhere on the forum, but keep in mind it's a very rough estimate.
viewtopic.php?t=9259&start=8550#p640816

http://www.formula1benzing.eu/index_cli ... 2_0083.jpg

Torque on boosted cars usually follow the boost curve, however I'm not sure peak torque happens at 11,500rpm, or even at 10,500, probably at lower engine speed.

That estimate is of the 2016 season, I wonder why the author hasn't made one for this year.

Peak torque is unlikely to happen under 10,500 because of the fuel flow limitations.

Most cars I tune peak torque happens long before the injectors reach peak duty cycle(~85%), I'm not saying that peak torque is at 7k rpm but not at exactly 10,500, maybe ~9,200k rpm.

[MrPotatoHead]

Torque on boosted cars usually follow the boost curve, however I'm not sure peak torque happens at 11,500rpm, or even at 10,500, probably at lower engine speed.

That estimate is of the 2016 season, I wonder why the author hasn't made one for this year.

Peak torque is unlikely to happen under 10,500 because of the fuel flow limitations.

Most cars I tune peak torque happens long before the injectors reach peak duty cycle(~85%), I'm not saying that peak torque is at 7k rpm but not at exactly 10,500, maybe ~9,200k rpm.

But remember this is not a fuel flow unlimited engine.
There is a linear fuel ramp up until you hit 10,500 then it’s flat right?