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From: Theo Bekkers on 11 Feb 2007 18:35 G-S wrote: > And this is exactly the difference in style of comment between someone > like Dales father and Hammo... You used style and Hammo in the same sentence. Theo
From: jlittler on 11 Feb 2007 18:38 On Feb 12, 7:46 am, G-S <g...(a)castbus.com.au> wrote: > Hammo wrote: > > <knobdoo...(a)hotmail.com> wrote: > >> "Hammo" <hbaj2...(a)aapt.net.au> wrote: > >>> dfDzh.6083$sd2....(a)news-server.bigpond.net.au, "Knobdoodle" > >>>> No; I'd probably say "dunno". I've never replaced an injector but I've > >>>> heard others tell me it was a fairly simple process (that didn't involve > >>>> "feedback loops" or "monitors") > >>> Geez, it must be my bed time. I meant that it was possible to exchange > >>> carbs from other motors and not have the dramas that would be associated > >>> with doing likewise with a EFI/MFI device. Think Holly with Aisan, then > >>> Motech with Bosch. > > >>> I did not mean swap an injector, I meant the entire system. > > >> Gee; the more I query the more "accidents' you seem to have had Hammo. > > > No, I wasn't clear. If that is interpreted as "accident" so be it. > > >>>> Well; the RPM is probably "actual". All the rest is just make-up based > >>>> on > >>>> pre-set responses to inputs. > >>> Like what. Nev and JL have discussed a few, but what makes it efficient > >>> and > >>> highlights where GB is so terribly wrong with his assumption about > >>> accurate > >>> measurement? > > >> Diversional-Blarglometer set to maximum, Captain! > > > No, not at all. > > > Let me clear it for you. > > > 70's and 80's (and probably 90's), manifold pressure gauges (aka > > squidgy-meter) were popular. Used to measure "economy". Gave you an > > indication of fuel usage. Big margin of error. > > > Now fuel systems are all about air to fuel ratio. Best situation is when > > the ratio is adjusted for all situations. Hence EFI becoming better and > > better wrt emissions. Why? It's not magic, it is due to the monitoring of > > the system and adjustments that are made via many circuits many times per > > second. What is based on? What measurement could possibly do this, what > > principle? Stoichiometry. > > > I.e. The equation for combustion wrt air:fuel ratio. That monitors how much > > fuel is required. It is calculated via moles of fuel based on the RON. > > This is why some cars run better, or require higher octane fuels (wrt EFI). > > The FI systems we have don't 'calculate' that, they use pre calculated > maps which specify ratios at certain revs and throttle openings. There's also a feedback loop from O2 sensor and knock sensor where fitted which moves around in the tables according to the feedback (if the o2 says it's a bit rich, knock n milliseconds off the injector times), if knock sensor says it's knocking retard injector and ignition timing etc > > If you have a running total of fuel used based on the chemical reaction, you > > have a better indication than fuel flow as it relates to the chemistry, i.e. > > irreversible chemical reaction that converts fuel to energy. JL
From: jlittler on 11 Feb 2007 18:43 On Feb 11, 11:50 pm, Hammo <hbaj2...(a)aapt.net.au> wrote: > <knobdoo...(a)hotmail.com> wrote: > > "Hammo" <hbaj2...(a)aapt.net.au> wrote: > Now fuel systems are all about air to fuel ratio. Best situation is when > the ratio is adjusted for all situations. Hence EFI becoming better and > better wrt emissions. Why? It's not magic, it is due to the monitoring of > the system and adjustments that are made via many circuits many times per > second. What is based on? What measurement could possibly do this, what > principle? Stoichiometry. > > I.e. The equation for combustion wrt air:fuel ratio. That monitors how much > fuel is required. It is calculated via moles of fuel based on the RON. > This is why some cars run better, or require higher octane fuels (wrt EFI). > > If you have a running total of fuel used based on the chemical reaction, you > have a better indication than fuel flow as it relates to the chemistry, i.e. > irreversible chemical reaction that converts fuel to energy. <doubtful look> maybe the F1 teams do this, but too bloody expensive for a run of the mill road car. JL
From: Theo Bekkers on 11 Feb 2007 18:46 Hammo wrote: > Theo Bekkers" wrote: >> Hammo wrote: >> >>> Actually, I'm gonna use solar power! >> >> Isn't petrol just very old solar power? > > Will I need to use synthetic or mineral oil? Olive. Theo
From: Theo Bekkers on 11 Feb 2007 18:47
atec" <"atec77 wrote: > Olive ? Damn, damn. Theo :-) |