HCCI

All that has to do with the power train, gearbox, clutch, fuels and lubricants, etc. Generally the mechanical side of Formula One.
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Zynerji
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Joined: Wed Jan 27, 2016 3:14 pm

Re: HCCI

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johnny comelately wrote:
Wed May 11, 2022 9:41 pm
Below is a summary of a research paper by Robert W. Dibble showing intake temperature being manipulated to achieve (inferred) HCCI in a stationary gas ICE, a huge challenge in my opinion.
In other papers he discusses oil's role in preignition (relevant to F1 previously) and ethanol characteristics in relation to preignition.
The more that research is exposed the more respect for the engine developers in F1, something we take for granted.
Dibble has many relevant and astounding research papers , links at the end.

2009-06-15
Demonstrating Optimum HCCI Combustion with Advanced Control Technology 2009-01-1885
We have converted a Caterpillar 3406 natural gas spark ignited engine to HCCI mode and used it as a test bed for demonstrating advanced control methodologies. Converting the engine required modification of most engine systems: piston geometry, starting, fueling, boosting, and (most importantly) controls. We implemented a thermal management system consisting of a recuperator that transfers heat from exhaust to intake gases and a dual intake manifold that permits precise cylinder-by-cylinder ignition control.
Advanced control methodologies are used for (1) minimizing cylinder-to-cylinder combustion timing differences caused by small variations in temperature or compression ratio; (2) finding the combustion timing that minimizes fuel consumption; and (3) tuning the controller parameters to improve transient response. Tasks 2 and 3 were accomplished with extremum seeking, a non-model- based optimization scheme that may help deliver a practical solution to the challenging problem of HCCI engine control.

http://profiles.sae.org/robert_dibble/
https://www.researchgate.net/profile/Robert-Dibble-3
A HAAS screen picture showed that they ran a hot and a cold fuel rail. Would it be possible to mix and inject a specific temp fuel to control the cylinder temperature? Or are the ranges simple out of scale?

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

Post

Zynerji wrote:
Wed May 11, 2022 9:54 pm
johnny comelately wrote:
Wed May 11, 2022 9:41 pm
Below is a summary of a research paper by Robert W. Dibble showing intake temperature being manipulated to achieve (inferred) HCCI in a stationary gas ICE, a huge challenge in my opinion.
In other papers he discusses oil's role in preignition (relevant to F1 previously) and ethanol characteristics in relation to preignition.
The more that research is exposed the more respect for the engine developers in F1, something we take for granted.
Dibble has many relevant and astounding research papers , links at the end.

2009-06-15
Demonstrating Optimum HCCI Combustion with Advanced Control Technology 2009-01-1885
We have converted a Caterpillar 3406 natural gas spark ignited engine to HCCI mode and used it as a test bed for demonstrating advanced control methodologies. Converting the engine required modification of most engine systems: piston geometry, starting, fueling, boosting, and (most importantly) controls. We implemented a thermal management system consisting of a recuperator that transfers heat from exhaust to intake gases and a dual intake manifold that permits precise cylinder-by-cylinder ignition control.
Advanced control methodologies are used for (1) minimizing cylinder-to-cylinder combustion timing differences caused by small variations in temperature or compression ratio; (2) finding the combustion timing that minimizes fuel consumption; and (3) tuning the controller parameters to improve transient response. Tasks 2 and 3 were accomplished with extremum seeking, a non-model- based optimization scheme that may help deliver a practical solution to the challenging problem of HCCI engine control.

http://profiles.sae.org/robert_dibble/
https://www.researchgate.net/profile/Robert-Dibble-3
A HAAS screen picture showed that they ran a hot and a cold fuel rail. Would it be possible to mix and inject a specific temp fuel to control the cylinder temperature? Or are the ranges simple out of scale?
Dont know Zynerji, but how interesting.
i would have thought it could be achieved by heating the whole rather than mixing two circuits

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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Another mention of the interaction between the TJI and peripheral ignition:
and a nice reciprocal view of the previous generation

gruntguru
gruntguru
547
Joined: Sat Feb 21, 2009 6:43 am

Re: HCCI

Post

johnny comelately wrote:
Wed May 11, 2022 10:13 pm
Zynerji wrote:
Wed May 11, 2022 9:54 pm
A HAAS screen picture showed that they ran a hot and a cold fuel rail. Would it be possible to mix and inject a specific temp fuel to control the cylinder temperature? Or are the ranges simple out of scale?
Dont know Zynerji, but how interesting.
i would have thought it could be achieved by heating the whole rather than mixing two circuits
If fuel temperature needs to be modulated rapidly for differing engine operating points, controlling the heater would have an excessively slow response. Blending of hot and cold streams to get the precise temperature required can be changed very rapidly.
je suis charlie

gruntguru
gruntguru
547
Joined: Sat Feb 21, 2009 6:43 am

Re: HCCI

Post

johnny comelately wrote:
Wed May 11, 2022 10:47 pm
Another mention of the interaction between the TJI and peripheral ignition: and a nice reciprocal view of the previous generation
. . although I don't think they are speaking of the Honda "HCCI" phenomenon.
je suis charlie

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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gruntguru wrote:
Wed May 11, 2022 11:23 pm
johnny comelately wrote:
Wed May 11, 2022 10:13 pm
Zynerji wrote:
Wed May 11, 2022 9:54 pm
A HAAS screen picture showed that they ran a hot and a cold fuel rail. Would it be possible to mix and inject a specific temp fuel to control the cylinder temperature? Or are the ranges simple out of scale?
Dont know Zynerji, but how interesting.
i would have thought it could be achieved by heating the whole rather than mixing two circuits
If fuel temperature needs to be modulated rapidly for differing engine operating points, controlling the heater would have an excessively slow response. Blending of hot and cold streams to get the precise temperature required can be changed very rapidly.
Or this method, as mentioned in the 50% efficiency thread
Unless they are matching appropriate temperatures with inlet temperatures


gruntguru
gruntguru
547
Joined: Sat Feb 21, 2009 6:43 am

Re: HCCI

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Have you read the paper on the Honda RA168e engine development? Used to be freely available around the net.

Good info on fuel heating and intake air heating to enhance efficiency.
je suis charlie

denktank
denktank
1
Joined: Sat Apr 25, 2015 6:18 pm

Re: HCCI

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Hello central valley HHO delivers HCCI systems for diesel engines.

denktank
denktank
1
Joined: Sat Apr 25, 2015 6:18 pm

Re: HCCI

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Aaron murikami plasma ignition

Ignitionsecrets

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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In this at aproximately the 19 minute mark my interpretation is that where the flame front is conflicting with the pressure wave causing detonation.
Of course there are other factors involved and this is a single point ignition in a particular circumstance. For one, when lambda is leaner there is more what he calls wrinkling of the flame front which increases flame speed significantly. Another is the effect of the acoustic waves.
Illustrative nonetheless.
Image



johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

Post

gruntguru wrote:
Thu May 12, 2022 5:13 am
Have you read the paper on the Honda RA168e engine development? Used to be freely available around the net.

Good info on fuel heating and intake air heating to enhance efficiency.
Yes I have, a good example of the result on power from the proper entry temperature and the properties of fuels in relation to that

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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If I can take a liberty and make this topic a pseudo combustion one here is an instructive video by Viessmann that explains some results of excess air in combustion.
Unfortuantely it is in low pressure circumstances like a boiler and the fuel is natural gas, but nonetheless revealing.


johnny comelately
johnny comelately
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Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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All the permuations are coming in...

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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"Michael Brear: Autoignition, Knock, Detonation and the Octane Rating of Hydrogen" IC engine and the effect of TEL on mitigating these little problems. Variables are CR, ignition timing, IVC temperature,
https://www.youtube.com/watch?v=VR6ru4DkiZs

johnny comelately
johnny comelately
75
Joined: Thu Apr 09, 2015 11:55 pm
Location: Australia

Re: HCCI

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Continuing the hijacking of this HCCI topic for discussion about combustion this tour of the Clean Combustion Research Center (CCRC), Saudi Arabia shows testing facilities for laminar ambient combustion at the beginning and then progresses through to high pressure later