I found this alternative, cheap and easy to make circuit to alter the O2 sensor signal compared to a full EFIE device. It was buried in chapter10.pdf, I cannot find any more information on it. Can anyone provide feedback on it?
"An alternative: As the signal coming from the oxygen sensor to the vehicle?s ECU fuel computer needs to be raised slightly to allow for the much cleaner exhaust produced when a booster is being used, an alternative solution has been suggested and tested. The idea is to add a small, adjustable voltage to the signal already coming from the oxygen sensor. This voltage can be from a single ?dry-cell? battery and adjusted with a variable resistor.
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The circuit shown here allows a voltage anywhere from zero to 0.5 volts to be added to the oxygen sensor signal. This must not be done unless a booster is running. Using it without a booster is liable to lead to engine overheating and possible valve damage. This, of course, applies to the previous oxygen sensor signal adjusting circuit as well."
Judging by no responses I assume no one has used this circuit to adjust their O2 sensor. I assume this is because this cheap circuit does not work.
If the circute is functioning as described, then it will work in a car but leaner fuel will head up the whole engine, so you have to use
a additional cooling option, like a water bubbler.
you can read some basics about cheating the lambda-carcomputer system
http://better-mileage.com/memberadx.html
atlantex
I also found a O2 altering devise similar to the one you have posted. The Mad Scientist HHO Research has a series of three videos on U-Tube where he builds and tests the unit. I haven't tried to build one yet, but it seams like it works.
Hope this helps,
http://www.youtube.com/watch?v=jgHJDD6UK0A (http://www.youtube.com/watch?v=jgHJDD6UK0A)
Lapperll
i just built this and it does what it is suspoto 8)
i have not installed it yet tho
ist
i was impressed by this lil circuit ....
;D ;D
i do recomend this unit
in my testing so far it has been worth the build time
ist
makeing 1 more as i have 2 o2 sensors....
I don't know how to make it, so I bought mine from Eagle Research. I don't make that much HHO yet to see any need of it at the moment since I have O2 extenders installed, but when I finish my new generator that will need it.
Hi Innovation,is it possible to post a better picture of the inside of the box so we can see where the wiring goes because i'm a bit confused about the pot wire going back to the - side of the battery in the layout, thanks
Quote from: sportcoupe on June 13, 2008, 05:17:06 PM
I found this alternative, cheap and easy to make circuit to alter the O2 sensor signal compared to a full EFIE device. It was buried in chapter10.pdf, I cannot find any more information on it. Can anyone provide feedback on it?
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fwww.blackgto.com%2Fjeep%2Falternative.jpg&hash=a586666c10d44ad116da74cc49d539dc39d27447)
Jes this will work.
if the Potmeter is left position (slider is to Minus of battery-Level , than ist same as "off",
so you must not angry to try this "sensetiv" to "shift" the level.
Pese
My EFIE from Eagle Research is on back order, so I made this simple circuit and installed it. It works great!! I adjusted the resistor values up to lower the circuit current. I use a 9vdc battery vs. the 1.5vdc AA for longer life. I'm also built a variable voltage regulator for the MAP sensor. My setup is a home made 4 cell series/parallel unit powered by a home built "Electric-light" PWM set at 10amps. My EFIE is set at 175mvdc bias, MAP is set to 4vdc. My results, as of yesterday, is an increase from 15mpg to 27.5 mpg. (first real test since installing working efie). My engine temp is down, the engine runs quieter and smoother, I seem to have more hp to lug up hills in 5th gear and the small amount of h2o coming out my exhaust is getting cleaner. I'm hoping for a repeat test result. My test vehicle is a 91 F150 4x4 w/ 4.9L. I first attempted to make this voltage divider circuit using dual voltage regulators powered off the vehicles 12vdc. The problem is the mv output needs to float. This circuit test "grounded" the O2 sensor. This is the beauty of the Eagle research efie, it floats the mv output using a iso trans. Simply...take a regulated dc input, convert it to ac, isolate it w/ a iso transformer, rectify it, filter and adj it for use w/ the O2 sensor. No batteries to monitor and change when needed.
Good luck, Gods speed
Randohr
Well, if u have a car battery in ur car already... why to use an extra one in this design?Just adjust the rating of a resistor accordingly and connect it to the car battery :)
extra battery needed, because thisone must be "galvanich separated from the supply (car) battery,
offcause this is not connected to "ground = minus) it is an part of the "sensing /probe " wire /connection.
Pese
An simply "a" cell - ALKALINE- will power this OVER YEARS (without of USE of an Power off switch !!
Because powerconsumtion ist only 0,1mAmp !! (1,5V over R(load) 15 Kili-Ohm ist 0,1ma Current)
You might also be able to use this with the s1r ignition system instead a hho booster. I will test this once I have built mine.