Honda Power Unit Hardware & Software

[hurril]

The entire unit looks too small though compared to pictures of the whole power unit. This looks to me like the one in the earliest engines, the ones where this entire turbo machinery assembly was inside the cylinder banks.

[saviour stivala]

The entire unit looks too small though compared to pictures of the whole power unit. This looks to me like the one in the earliest engines, the ones where this entire turbo machinery assembly was inside the cylinder banks.

It is too blurred to calculate anything.

[etusch]

It would be great to have eng subs

You can choose the language yourself by activating the subtitle and then choosing your language
in settings under "automatic translation".

Oo thanks I just tried subtitle, there was not any then watched without understanding

[saviour stivala]

It would be great to have eng subs

You can choose the language yourself by activating the subtitle and then choosing your language
in settings under "automatic translation".

Oo thanks I just tried subtitle, there was not any then watched without understanding

The blurring of the turbo/MGU-H assembly is for sure intentional and that spoiled the whole thing. Shame.
I tried subtitles too and I too found nothing.

[ispano6]

Hit CC to open closed captions, then the gear icon and change the language.

The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.

What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.

Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.

[saviour stivala]

Hit CC to open closed captions, then the gear icon and change the language.

The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.

What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.

Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.

What 'internals' of the split Honda turbo have you seen?

[Wazari]

Hit CC to open closed captions, then the gear icon and change the language.

The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.

What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.

Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.

618. The 619 is quite different.

[ispano6]

Hit CC to open closed captions, then the gear icon and change the language.

The English auto translate won't give you much details seeing some of the translation talks about eating and other nonsensical stuff.

What they are displaying is likely RA617H internals, possibly RA618H. Wazari-san probably could tell us. A good portion talks about bearing size and thickness can't be too large in order to achieve and maintain peak RPM.

Seeing the internal apparatus of the split turbo in front of the three gentlemen reminds me of how compact this PU really is.

What 'internals' of the split Honda turbo have you seen?

Just what is visible in the video, but as Wazari-san said it's RA618H, likely Spec 2 and after since they are talking about it as if the bearing issues were applied in the demonstration unit. These men standing in front of it aren't that big people mind you, it's a marvel how short the compressor to turbine is which looks like it's still pretty much within the V. The V might have been flattened and spread apart a bit so that the apparatus can reside between the cylinder banks.

[PlatinumZealot]

It is commendable that Honda is showing us this. And using ACTUAL engineers to explain it to us.

The European F1 culture is one of secrecy, one of the reasons being that engineering personnel are easily poached once the money and perks are right. The Japanese have a huge language, cultural and geographical barriers so their engineers are mostly safe from poaching and why they can show of their engineers so easily.

These Honda engineers have a very cautious look about them, like, hey be careful of revealing too much!

[godlameroso]

[etusch]

En interesting design (at least for me)

[gruntguru]

WOW. Reading the fine print in that first image (It doesn't look fake). Compressor PR is 5:1. Turbine power is "4 city cars". Exhaust temp 1000+*C.

At 5:1 PR the AFR is >2.0 lambda - almost certainly stratified charge on top of TJI. Compressor power perhaps 200 kW. Turbine power perhaps 350 kW.

These numbers have moved along a lot since the early days.

[Mudflap]

At 5:1 PR the AFR is >2.0 lambda

How can you tell ? Massflow rate could still be anything ?

[gruntguru]

I didn't bother doing the calcs (I will later) but from memory (using reasonable assumptions) for 3.5 bar MAP, the mass flow was 0.55 and AFR was 1.6 - 1.8.

Assumptions:
- RPM = 11,000
- VE = 1.1 - 1.2
- CAT = 30* - 50* C
- Compressor isentropic efficiency = 0.8

[trinidefender]

I didn't bother doing the calcs (I will later) but from memory (using reasonable assumptions) for 3.5 bar MAP, the mass flow was 0.55 and AFR was 1.6 - 1.8.

Assumptions:
- RPM = 11,000
- VE = 1.1 - 1.2
- CAT = 30* - 50* C
- Compressor isentropic efficiency = 0.8

I would imagine slightly lower VE due to shaping ports for highly controlled combustion, swirl and tumble. Especially if stratified combustion is used. Wouldn't that push the emphasis away from pure airflow?