Search found 98 matches
- Thu Jul 03, 2014 2:27 am
- Forum: Misc
- Topic: B&G patents - what does it mean for rusEfi?
- Replies: 3
- Views: 5150
Re: B&G patents - what does it mean for rusEfi?
And this is what is wrong with patent office… B&G patents are only good for “patent trolls” that threaten litigation for an out of court settlement. The patents should have never been published/granted because there is nothing new or novel, simply put, technical merit was never evaluated (why pa...
- Thu Jun 26, 2014 8:26 pm
- Forum: Dev: Software
- Topic: electronic throttle body control ETB
- Replies: 290
- Views: 351491
Re: electronic throttle body control
With ETB I am focusing on the fact that a lot of cars are using ETB already. For us to be able to control these engines somehow, we need some bare bones implementation. All we need now is a plain "electrical cable" implementation, the one the the pedal is directly linked to ETB position. ...
- Thu Jun 26, 2014 3:06 am
- Forum: Dev: Software
- Topic: electronic throttle body control ETB
- Replies: 290
- Views: 351491
Re: electronic throttle body control
First I will agree, throttle by wire/drive by wire, whatever you want to call it, should be last. On today’s cars throttle pedal position does not equal throttle blade position… and to assume so is far from reality. Some examples; * An 87mm TB (throttle body) can be found on engines ranging from 4.8...
- Sun Jun 15, 2014 10:40 pm
- Forum: Dev: Hardware
- Topic: Ignition and Ignition modules
- Replies: 28
- Views: 22812
Re: Ignition and Ignition modules
140-160 PSI depends on cam.
Edit -
You don't need allot of energy for that low a CR without turbo/supercharger/NO2...
Edit -
You don't need allot of energy for that low a CR without turbo/supercharger/NO2...
- Sun Jun 15, 2014 10:33 pm
- Forum: Dev: Hardware
- Topic: Ignition and Ignition modules
- Replies: 28
- Views: 22812
Re: Ignition and Ignition modules
The higher the cylinder pressure the more dense air/fuel charge is, thus more energy required to ignite charge. You can compensate a little by closing spark plug gap, but you hit point of diminishing returns. So biggest single variable is cylinder pressure, then head volume. On small engines it’s re...
- Sun Jun 15, 2014 5:47 pm
- Forum: Dev: Hardware
- Topic: Ignition and Ignition modules
- Replies: 28
- Views: 22812
Re: Ignition and Ignition modules
If volume stays fixed then cylinder pressure must go up to make more power.
- Sun Jun 15, 2014 4:45 am
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
Removed example...
- Sat Jun 14, 2014 9:29 pm
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
Sorry been busy… But answer is on page 3 where I said “Everything above is in metric (KG/sec, M^3…). Also R (gas constant) is for dry air and you’ll notice that newer cars now have humidity sensor built in!” Gas constant has “standard day” humidity built into it, but still dry by comparison to Flori...
- Wed Jun 11, 2014 5:18 pm
- Forum: Dev: Software
- Topic: STM32F4xx Seminar
- Replies: 1
- Views: 3363
STM32F4xx Seminar
Got this invitation through Avnet. Figure some people may be interested.
Refer to http://www.st.com/web/en/learning/seminar/STM32_Cortex_M4_Low_Power_DSP_Seminars .
Refer to http://www.st.com/web/en/learning/seminar/STM32_Cortex_M4_Low_Power_DSP_Seminars .
- Wed Jun 11, 2014 5:05 am
- Forum: Misc
- Topic: who wants to port to Power Architecture?
- Replies: 64
- Views: 58100
- Tue Jun 10, 2014 10:14 pm
- Forum: Dev: Software
- Topic: Battery backed ram and other wish list ideas
- Replies: 14
- Views: 12929
Re: Battery backed ram and other wish list ideas
All I’m trying to do, is to nudge/push certain topics forward… If as an example a few people tackled one very simple aspect, ECU coding could be defined within months. As far as my project, defining critical algorithms was done before a single line of C was written. They have been tweaked/enhanced o...
- Tue Jun 10, 2014 6:20 am
- Forum: Misc
- Topic: who wants to port to Power Architecture?
- Replies: 64
- Views: 58100
Re: who wants to port to Power Architecture?
With that board you will need a JTAG programmer, if you choose Freescale toolchain then you’ll have to buy P&E JTAG or similar at about $275, if you go with ST toolchain then JTAG will run about $100. They purposely try to lock you in… Also 128K gets eaten up quickly, I’m at ~310KB, no data tabl...
- Tue Jun 10, 2014 6:17 am
- Forum: Dev: Software
- Topic: Battery backed ram and other wish list ideas
- Replies: 14
- Views: 12929
Re: Battery backed ram and other wish list ideas
Well one thing that surprises me is, I have not seen any mathematical or systematic approach mentioned on this forum on how to actually control an engine. I have yet to see a book on coding of an ECU, so work is required here. A few examples; * How much timing do you pull vs IAT (inlet air temperatu...
- Mon Jun 09, 2014 4:37 am
- Forum: Dev: Software
- Topic: Battery backed ram and other wish list ideas
- Replies: 14
- Views: 12929
Re: Battery backed ram and other wish list ideas
as far as i got the point, it's more the matter of clock (the time the engine was shut down), rather than safely storing extra tables... I’m not sure I understand… Cold/hot starts should have nothing to do with fuel trims, unless engine is already warm enough to go into closed loop. Even then there...
- Wed Jun 04, 2014 11:32 pm
- Forum: Misc
- Topic: who wants to port to Power Architecture?
- Replies: 64
- Views: 58100
Re: who wants to port to Power Architecture?
As for what NOBODY said... I'm trying to separate the sarcasm from the factuals. :D Yes, that was sarcasm laden LOL. Oddly every TPU function I’ve worked with to date has worked as advertised. Some require more effort/knowledge to configure correctly than others. To your other point, without using ...
- Wed Jun 04, 2014 4:05 am
- Forum: Misc
- Topic: who wants to port to Power Architecture?
- Replies: 64
- Views: 58100
Re: who wants to port to Power Architecture?
Would you consider listing it on eBay? If not, I would happily pay $20 :) I hope that MPC5634M processor is a member of the MPC563xM family, which according to http://en.wikipedia.org/wiki/PowerPC_5000#MPC56xx is same as as SPC563M which according to http://forum.chibios.org/phpbb/viewtopic.php?f=1...
- Mon Jun 02, 2014 4:26 am
- Forum: Dev: Software
- Topic: RTOS options
- Replies: 33
- Views: 31685
Re: RTOS options
Yes, I found o5e by accident about 4 months ago. With all due respect no comment…
EDIT-
As mentioned earlier, millions of cars on the road with same function set would contradict or invalidate statements. Also to knowledge a single cylinder function does not exist.
So let’s agree to disagree
EDIT-
As mentioned earlier, millions of cars on the road with same function set would contradict or invalidate statements. Also to knowledge a single cylinder function does not exist.
So let’s agree to disagree
- Mon Jun 02, 2014 12:36 am
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
http://www.ls1howto.com/howto/c5/5pinmafconversion/pics/mafgraph.jpg Most MAFs have a curve that strongly resembles above, far from linear. So unless you know curve ahead of time, solving for it on engine is not fun. I've had to get S/D tune nailed down before working on MAF characterization. My fu...
- Mon Jun 02, 2014 12:03 am
- Forum: Dev: Software
- Topic: RTOS options
- Replies: 33
- Views: 31685
Re: RTOS options
As mentioned my MPU selection is etched in stone… So what does the MPC56xx have going for it? Overall specs: * -40 to 125, or -40 to 150 degree C temperature range (depending on which one is specified). * 5V I/O both analog and digital. * Up to 56 timed I/O pins with 24 bit resolution (not 16 bit li...
- Sat May 31, 2014 11:50 pm
- Forum: Dev: Software
- Topic: Battery backed ram and other wish list ideas
- Replies: 14
- Views: 12929
Re: Battery backed ram and other wish list ideas
If a LTFT (long term fuel trim) and STFT (short term fuel trim) model was adapted, then saving to say a serial EEPROM would be viable. LTFT can be considered course adjustment and STFT fine adjustment. LTFT can be saved to EEPROM maybe even Flash if done correctly (writes should be limited in nature...
- Sat May 31, 2014 9:22 pm
- Forum: Dev: Software
- Topic: RTOS options
- Replies: 33
- Views: 31685
Re: RTOS options
Has anybody looked at OSEK variants, of which there are many? I decided on MPC56xxx family long before joining this site, so that is etched in stone. I have looked at ChibiOS as there is support for MPC56 family but not complete, eMIOS is not 100% and don’t think TPU will ever get there (too many va...
- Sat May 31, 2014 8:04 am
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
Gotcha. So, just a curve by MAP. I will implement it as a multiplier and just set it to '1' by default. I’d suggest you use proposed table to calculate actual IFR (injector flow rate) used in S/D or MAF equations. The longer you stay in actual engineering units the better, because a multiplier foll...
- Fri May 30, 2014 7:20 pm
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
The simplest way to deal with return and returnless fuel systems is to add a table that defines injector mass flow vs MAP. For return type systems (must be intake manifold referenced) you simply use the same value all the way across (123, 123, 123… in table). Now for returnless you can use manufactu...
- Fri May 30, 2014 5:50 pm
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
Couple things need to be considered at this point. What is realistic end user of this system going to use it for? Why did I ask that? Well I’m back to fuel injectors… Most systems today (~2000+ model year) are returnless fuel systems in which fuel pressure regulator is in gas tank and you have singl...
- Fri May 30, 2014 4:45 am
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
15-105 kPa is normal or I don't think I've seen a N/A (naturally aspirated) MAP other than 105 kPa. When getting into forced induction (turbo/supercharger) then MAPs can be 2, 2.5, 3 bar...
- Thu May 29, 2014 4:44 pm
- Forum: Dev: Hardware
- Topic: Ignition and Ignition modules
- Replies: 28
- Views: 22812
Re: Ignition and Ignition modules
so, basically, it's not just the matter of intensity. duration is also important! i always knew they won't use non-efficient stuff on modern cars). longer spark is needed just to be sure you make it right in time, or it's the nature of gas ignition inside the chamber, which needs longer spark durat...
- Thu May 29, 2014 4:34 pm
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
What the heck.. Yes, if you're going to add map support, don't waste a ton of time doing it wrong. Let someone help put the equation in the code for you. As for a base VE table, set them all to 75%, let the first person to get a running engine tune it, and use their's as the baseline till something...
- Thu May 29, 2014 4:29 pm
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
Just to add a little more to my previous post… MAF in its simplest terms… IPW = MAF / (AFR * IFR) As can be seen it doesn’t take much to jump from S/D to MAF. Injector characterization would be the same for both control methods, it is an overall adder to IPW based on offset vs voltage and flow vs pr...
- Thu May 29, 2014 12:58 am
- Forum: Dev: Software
- Topic: MAP but not SD as intermediate solution?
- Replies: 69
- Views: 64781
Re: MAP but not SD as intermediate solution?
I agree with most of the above… A basic speed density is preferred method and would still be standard on OEM cars if it was not for tightening emissions and CAFE standards. Almost all aftermarket ECUs default to S/D, we are talking units that cost $1000-6000 USD. MAF (mass air flow - in grams second...
- Wed May 28, 2014 10:52 pm
- Forum: Dev: Hardware
- Topic: Ignition and Ignition modules
- Replies: 28
- Views: 22812
Re: Ignition and Ignition modules
almost four times more expensive than mine (per plug). although should be more reliable. as far as i got, some of the modern "Soviet" cars are also using somewhat COPs, obtainable at the same price (20$ per plug) new, also controlled with 5v ttl signals (if i'm not mistaken). considering ...