Hi good folk..
Ok, a small update as to work do far.
I have transferred the main task to a simple Microprocessor (in this case an Arduino UNO) simply because I have a few .... My main expertise is in Microchip 'PIC' embedded processor programming, however, the Arduino is proving quite adept at doing the job and is fairly easy to got one's head around.
So, what we have is a unit (the arduino UNO R3) that costs less than 3 quid from China. - and a few op amps - and we are good to go. Now, when I say 'good to go' I mean in all aspects - Fuel pressure regulation and tuning, MAF adjustment and amplification / tuning, rpm Sensing. VNT turbo tuning if needed - almost anything/ All in one package. The UNO R3 is a development system, the same thing can be bought in a vastly miniaturised form for a few quid.
This allows us to program a lot of internal 'maps' of input Voltage from the sensor to output voltage from the sensor, and have multiple /maps/ to chose from to suit any need you want..
The main thing is that it is digital, it is cheap, it allows FULLY non linear mapping of in and out values. It allows adjustment for low or med or high output 'increase'
It can do multiple things at once - ie - one unit can control all desired options.
It is REALLY simple for the home user with an even basic understanding of a circuit diagram and soldering to build. All the main work is in the software / firmware which I will probably release into the public domain (or certainly to forum members) - I have no doubt it will be copied at some time - but hey..... What I WILL do is enable the individual user here to SIMPLY tweak the maps as they require (for their own use !) with not too much knowledge.
Yes, it all requires a basic - very basic - knowledge of HOW the sensors work in relationship to the ECU / DCU - beyond that, a way of judging where and when adjustments to the 'tweaked' curves need to be made (does it smoke at X revs at X throttle etc) - not too difficult - all the programming stuff is free, it is simple to use, you only need to alter a few parameters as you deem fit.
NO you do not have to be a programmer as the work is done for you. YES it is far more adjustable than
ANY commercial unit.
Yes, it means adding a few wires from the unit to the loom, but that is simple -
NO, you do not get commercial plugs to simply plug it in.
However, what you DO get is a unit as good as
anything out there with the ability for
YOU to adjust it - or, for other users more knowledgeable to adjust and tweak and then - for YOU to copy. Win Win. - share share !.. Early days at the moment but the main core processing work is done. Just playing with a few mapping equations.
ALL In one unit - rpm sense, Fuel pressure adjustment, Maf adjustment - (Possibly - VNT adjustment - I say Possibly as it is easy to do - but - I do not want to tread on a
very good friends toes !)
Next steps -
What I NEED is information !
L series - no worries. !
TD4 - well, yes, I NEED someone with a data reader that can record multiple sources of info and play back the same. My Lynx can do that do worries. I have no idea is the i930 or the Hawkeye can do the same ?
I 'COULD' lend my lynx to the right person - however I am in Portugal and someone would have to stand the cost of shipping both ways AND full insurance.
The MORE data we have the easier it is to produce the appropriate 'maps' - the hardware is P!SS easy !.
Regards
Joe
Test rig - on sofa while Doris is out
(Fer fecks sake don't tell her !!!
)
Multi- Meters - you need a few
VERY good quality at this stage - Extech 570A, Hibok 55C, (and a mediocre Uni-T UT118A)
In the pic - Arduino UNO R3 - where map is equal - Rin = Rout. A few odds and sods ofcomponents to simulate the sensor to ecu link
Deep joy
And yes, the HIBOK 55C is a superb DC Clamp meter for
DC current (up to 700A!) - amazing bit of kit I have had since my marine electronics repairs pseudo 'job'
There are PLENTY of
AC Clamp meters for sale - but look for a good quality DC unit ?? - rare as rocking horse SH!T...
Ayyway, progress is being made, I cannot guarantee a 'continued' development timescale as you get whatever I have time to do and also whatever data I receive. But, we will get there.
There is always the easy possibility of making a few PCB units for a few quid although I am not convinced they are needed - but hey..... possibly even an LCD display with adjustable 'map' curves via button push... all it takes is time and data......
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