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Home > Paul S trials and testing > Siamese Code Trial - Take Three | |||||||
8604 Posts Member #: 573 Formerly Axel Podland |
22nd Feb, 2009 at 07:43:52pm
Carrying on from Jean's thread about the new code.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Feb, 2009 at 07:49:59pm
And another one: Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
22nd Feb, 2009 at 07:57:32pm
Do you have any acceleration enrichment set? And if so, does it get triggered? That could throw things off if there are false events (or even real ones).
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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Feb, 2009 at 08:04:44pm
No acceleration enrichment set at the moment. Just trying to baseline with a simple set of rules.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Feb, 2009 at 08:26:48pm
Also, the reason that the AFRs are a bit on the lean side is that we had to reduce the fueling to the inner cylinders by 30-40% to get them close !!!
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
22nd Feb, 2009 at 08:54:16pm
30-40%!!! That's huge. Could it be that the timing of the outer cylinders is off and you're actually fueling the inner cylinders from the outer cylinders pulse?
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8604 Posts Member #: 573 Formerly Axel Podland |
22nd Feb, 2009 at 10:06:52pm
We tried shifting the timing from around 90 to 180 degrees BTDC for the mid pulse. The best settings at full thrittle are in the region of 140-160 degrees BTDC.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
22nd Feb, 2009 at 11:24:18pm
That sounds good. At this point, you certainly have more experience than I do so I'm pretty much just a back seat driver (and probably as useful) :)
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8604 Posts Member #: 573 Formerly Axel Podland |
23rd Feb, 2009 at 09:34:05am
The good thing is that the code has sufficient flexibilty to make things work.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
23rd Feb, 2009 at 11:01:42am
The attached spreadsheet shows a method of calculating the injection timing points.
Edited by Paul S on 1st Mar, 2009. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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857 Posts Member #: 1778 Post Whore Northants |
23rd Feb, 2009 at 12:18:42pm
Are those the values with the new ve rates? In the 1.5-3k range we are using injection timing rates close to the spreadsheet. |
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8604 Posts Member #: 573 Formerly Axel Podland |
23rd Feb, 2009 at 12:23:38pm
Yes, I recalculated it this morning using the actual VE values for the outer cylinders.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
24th Feb, 2009 at 04:47:31am
Paul,
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8604 Posts Member #: 573 Formerly Axel Podland |
24th Feb, 2009 at 11:29:58am
Jean,
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2009 at 01:45:42pm
Still struggling to get the inner cylinders to run at the same AFR as the outers at wide open throttle.
Edited by Paul S on 28th Feb, 2009. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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Forum Mod 10979 Posts Member #: 17 ***16*** SouthPark, Colorado |
28th Feb, 2009 at 04:41:36pm
What duty are you running at?
On 17th Nov, 2014 Tom Fenton said:
Sorry to say My Herpes are no better Ready to feel Ancient ??? This is 26 years old as of 2022 https://youtu.be/YQQokcoOzeY |
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8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2009 at 04:43:30pm
Significant difference on the new injectors.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2009 at 04:49:07pm
On 28th Feb, 2009 TurboDave said:
What duty are you running at? Can you up (or lower) the fuel pressure to see if the wetting occurs at the same RPM , or if it is more duty-clcle (pulses merging) related? I could lower the fuel pressure, but the pulses may merge at high revs as they will have to be bigger. Pulse widths are below 5ms which is the equivalent of 180 degrees crank angle at 6000 rpm. So the pulses should not merge. I think that makes the duty less than 25%. Edited by Paul S on 28th Feb, 2009. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
28th Feb, 2009 at 06:07:23pm
What value are you using for the opening time? If this is not correct, the actual fuel timing is somewhat affected but more importantly, the fueling is not affected as you would think when updating the VE table(s).
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8604 Posts Member #: 573 Formerly Axel Podland |
28th Feb, 2009 at 06:12:32pm
On 28th Feb, 2009 jbelanger said:
What value are you using for the opening time? If this is not correct, the actual fuel timing is somewhat affected but more importantly, the fueling is not affected as you would think when updating the VE table(s). If it's too long even with a very small VE value you will still get a significant amount of fuel being injected. With the very small pulse widths you're using, if you vary the VE value a certain percentage, the actual fueling will not vary by the same percentage because a significant part of the actual fuel being injected is in the opening time which is constant. So it might be good to start lowering it if you have not done anything other than use the default 1ms. Jean I'm using 1mS. I think that's about right because I've just put in the smaller injectors and the calculated Req_fuel is giving the same AFRs as before. Edited by Paul S on 28th Feb, 2009. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
28th Feb, 2009 at 08:23:55pm
That sounds good. It should mean that the error, if any, is not significant.
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8604 Posts Member #: 573 Formerly Axel Podland |
1st Mar, 2009 at 03:29:41pm
Well, Ive spent another weekend on this and still no nearer.
Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
1st Mar, 2009 at 04:48:26pm
Can you send me your msq? I'd like to have a look on the bench to see if there is something with the code that's not as it should be.
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8604 Posts Member #: 573 Formerly Axel Podland |
1st Mar, 2009 at 05:01:36pm
Jean,
Edited by Paul S on 1st Mar, 2009. Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
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1267 Posts Member #: 831 Post Whore Montreal, Canada |
1st Mar, 2009 at 05:33:22pm
msq received. I'll have a look and report back to you.
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