Re: Ferrari Power Unit Hardware & Software
Posted: 19 Oct 2022, 12:45
HCCI combustion for Ferrari?
Would violate the rules. The rules state that the combustion must be initiated with a spark from a sparkplug.
Page 423 of 431
Re: Ferrari Power Unit Hardware & Software
Posted: 19 Oct 2022, 13:47
Re: Ferrari Power Unit Hardware & Software
Posted: 19 Oct 2022, 14:05
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 08:47
Reportedly Charles will get the "improved reliability" ICE in Austin.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 18:44
This would mean that knock is illegal. Anyone can trigger a "spark" coincidentally. It's impossible for the FIA to police.
Perhaps the HCCI was involved in the prodigal 2019 PU and for this reason, Ferrari did not want the technical details of the matter in the public. It would explain the concept change for 2020 that saw them fall backwards. Maybe the agreement with the FIA was that they had to revert to spark ignition for 2020 and since they were a year behind the others on that concept, the 2020 PU was poor relatively.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:06
Well the problem of unintentional knock generally solves itself rather quickly...AR3-GP wrote: ↑20 Oct 2022, 18:44
This would mean that knock is illegal. Anyone can trigger a "spark" coincidentally. It's impossible for the FIA to police.
The rule of course means the regular intentional combustion must be triggered by a spark and it's far from impossible to police. They have knock sensors, which show you when actually combustion happens and they log the ignition timing. That's all you need.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:11
Knock happens post spark.Dr. Acula wrote: ↑20 Oct 2022, 22:06Well the problem of unintentional knock generally solves itself rather quickly...
The rule of course means the regular intentional combustion must be triggered by a spark and it's far from impossible to police. They have knock sensors, which show you when actually combustion happens and they log the ignition timing. That's all you need.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:30
I don't mean to get semantical about it but I mean any form of pre-ignition (which by definition is not controlled and can occur before or after the spark).Zynerji wrote: ↑20 Oct 2022, 22:11Knock happens post spark.Dr. Acula wrote: ↑20 Oct 2022, 22:06Well the problem of unintentional knock generally solves itself rather quickly...
The rule of course means the regular intentional combustion must be triggered by a spark and it's far from impossible to police. They have knock sensors, which show you when actually combustion happens and they log the ignition timing. That's all you need.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:31
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:32
Not necessarily. You could have detonation prior to combustion, or combustion that happens because there is too much cylinder pressure or heat, multiple flame fronts etc.
Your spark is there to control precisely when best to ignite the fuel/air mixture in the cylinder before the piston reaches TDC in normal running mode. This is done in order to get the most power/efficiency from the engine. Igniting your mixture too early or too late can lead to knock or pre-detonation which will also result in a lack of power from a non optimised ignition timing map
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:36
The way its always been explained to me is that the spark Shockwave will cause multiple ignition sites through the chamber due to high pressures, since this wave travels faster than the flamefront.chrisc90 wrote: ↑20 Oct 2022, 22:32Not necessarily. You could have detonation prior to combustion, or combustion that happens because there is too much cylinder pressure or heat, multiple flame fronts etc.
Your spark is there to control precisely when best to ignite the fuel/air mixture in the cylinder before the piston reaches TDC in normal running mode. This is done in order to get the most power/efficiency from the engine. Igniting your mixture too early or too late can lead to knock or pre-detonation which will also result in a lack of power from a non optimised ignition timing map
I guess if you had no cooling and then were under full load that you could have pre-ignition knock.
Re: Ferrari Power Unit Hardware & Software
Posted: 20 Oct 2022, 22:39
Apologies for the confusion. As you say, what you refer to is "knock". What I refer to is known colloquially as "pre-ignition", not "knock". The former is not "controlled" per say (unless you were attempting to replicate an HCCI under the cover of a spark ignition engine)Zynerji wrote: ↑20 Oct 2022, 22:36The way its always been explained to me is that the spark Shockwave will cause multiple ignition sites through the chamber due to high pressures, since this wave travels faster than the flamefront.chrisc90 wrote: ↑20 Oct 2022, 22:32Not necessarily. You could have detonation prior to combustion, or combustion that happens because there is too much cylinder pressure or heat, multiple flame fronts etc.
Your spark is there to control precisely when best to ignite the fuel/air mixture in the cylinder before the piston reaches TDC in normal running mode. This is done in order to get the most power/efficiency from the engine. Igniting your mixture too early or too late can lead to knock or pre-detonation which will also result in a lack of power from a non optimised ignition timing map
I guess if you had no cooling and then were under full load that you could have pre-ignition knock.
Re: Ferrari Power Unit Hardware & Software
Posted: 21 Oct 2022, 11:28
Re: Ferrari Power Unit Hardware & Software
Posted: 12 Nov 2022, 12:11
Anyone care to explain how this compressor works.
And if you jump in and say the ChronoTV stuff is nonsense that is ok, just sketch or explain how the real thing works because in the associated photos that end plate does exist
https://www.youtube.com/watch?v=XUXiiB7LgHE
And if you jump in and say the ChronoTV stuff is nonsense that is ok, just sketch or explain how the real thing works because in the associated photos that end plate does exist
https://www.youtube.com/watch?v=XUXiiB7LgHE
Re: Ferrari Power Unit Hardware & Software
Posted: 12 Nov 2022, 16:04
You will need to translate:johnny comelately wrote: ↑12 Nov 2022, 12:11Anyone care to explain how this compressor works.
And if you jump in and say the ChronoTV stuff is nonsense that is ok, just sketch or explain how the real thing works because in the associated photos that end plate does exist
https://www.youtube.com/watch?v=XUXiiB7LgHE
https://images-wixmp-ed30a86b8c4ca88777 ... vVHsiwMVlc
https://it.motorsport.com/f1/news/f1-fe ... /10397048/
Italian motosport (Nugnes) claims that end plate is an intercooler, not a compressor.