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Old 09-05-2008, 06:30 PM   #1 (permalink)
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Question fuel management questions for hydrogen

I have a hydrogen generator of my own design running on two different Fords. My problem with the t-bird 4.6 is the fuel mileage fluctuations with the egr working when it wants to. My van mpg's would never get past 20 mpg until i disconnected the auxilliary air valve on the 4.0. Turns out the air valve was open too much or too long and killed my mileage. Now i have the maf tuned with a circuitboard and the o-2 sensor is set to 14.7/1 fuel ratio.

The t-bird is a different monster though. I see in haynes manual something called a octane plug, but cant find anything about it as far as what it does. The next thing is the oxygen sensors, i want to control the o-2 sensors, but there are 4 and i dont know if i can control 1 from each bank or not. next question is the iat sensor, if it reads cooler temps will the ecu lean out the mix or the opposite?
Basically i would love someone in the know to explain the components and their effects on the ecu so i know where to look for improvements. This car has been tempermental, but i love it, actually its my wifes car. I have had to repair all of the common problems, door striker, hinges, egr clogged, bad sensors, replaced air filter housing with cone filter and now it runs a hydrogen cell putting out about 1 LPM@ 12 amps.

I am trying to design and build new hydrogen designs, but i have to figure out how to maximize the effects on ALL vehicles so i am using what i have as my testbed vehicles. One thing that may come up in the future is the timing adjustment which i am unable to do at this time. Any help will be appreciated.
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Old 09-06-2008, 06:55 PM   #2 (permalink)
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I've never heard of an octane plug in my whole life. I also worked parts for a long time.

Are you wanting to trick the PCM with false injector readings or are you trying to change the injector readings to make the PCM thinks its in the ideal state at a different stoichiometric ratio than 14.7-1?

The IAT sensor is used to get an idea of the density of the air entering the engine. Colder air is more dense and the PCM or ECM will compensate the injectors duty cycle in order to keep the engine from running lean.
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Old 09-07-2008, 04:43 PM   #3 (permalink)
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Default tricking ecu

Yes i am trying to trick the ecu into thinking the air mixture is 14.7-1 when it is actually more like 18-1 or leaner mix. The hydrogen and oxygen being produced in my cell raises the octane level of the mixture and adds more fuel to burn which compensates for the leaner condition. My problem has been making the computer read less oxygen at the o-2 sensor so it doesn't overcompensate for what it sees as a lean mixture due to the extra oxygen introduced by the hydroxy cell.
In most cases when my hydroxy cell is put on a vehicle with no modification utilizing stock computer controls, the computer sees the oxygen in the exhaust as a lean condition and richens the mix to compensate. This causes the fuel mileage to drop slightly with hydroxy. I have not been able to make a carbuerated engine run any longer introducing hydroxy gas. I believe this is due to the lack of fuel control since it is a fixed flow due to jet size. I can reduce the jet size and make the carb. engine run on hydroxy in the leaner state with the same load on it as with the larger jet. If i don't use the hydroxy with the leaner jet it has to be choked almost constantly to stay running.

I think the fuel air mixture must be controlled to a very high level to obtain sufficient mileage results from hydroxy. In order to test this i am using the 4.6 in the t-bird stock with a hydroxy cell running. Sometimes it gets 30 mpg and other times it gets 20. If i shut off the cell it may get 20 or even 25 at times. It is quite erratic. The van using 4.0 v-6 , hydroxy cell (1.5 LPM) , maf and oxy adjusting circuit board gets 14 mpg without and usually 20mpg with but up to 24 mpg. The day i wrote this the van got 14 mpg with the cell shut off and 24 with it on. I ran 20 miles for each test and used the same gas pump to fill up. I realize my results fluctuate a lot because of the method used to determine mileage, but i dont have a better way of testing yet, im poor and spent all my money building prototypes, lol.

I run tests almost every day and try something new to isolate contributors to my results. One common contributor is heat. As the temps go up my results go down. I have eliminated heat from my cell but not from the engine or engine compartment. The other culprit i have found to be air. My circuit board controls the voltage from the maf to ecu. I had to disconnect the air bypass valve because it would eliminate all control from my maf sensor. With it disconnected i have the ability to change the mixture, or duration, of injection. I can see that instantly with the led's displaying the pulse from the o-2 sensor on the circuitboard. I have the maf sensor voltage at its lowest setting right now with the air valve disconnected and the o-2 sensor reading 14.7-1 in closed loop. This is giving me my best results and the engine runs great with no pinging at full throttle. I can richen the mix by turning up the maf voltage and get improved power at top end but it kills the fuel economy if left that way. Engine temp actually goes up with it running richer too, can't figure that one out, but it never overheats
Anyway, the 4.6 worked with the hydroxy on a test track using measured amounts of fuel. We ran each test 2 times to verify results and showed a 25% improvement with hydroxy cell running. Weeks later i tried to show an investor the same results and my mileage got slightly worse. I was devastated. Since then i have noticed my results are erratic, but have not been able to isolate a single culprit. Both vehicles experience the same fluctuation so it may not be the car. I am now investigating the possibility that the hydrogen content of the solution may be depleted, but that seems ridiculous to me. Even so, i am testing that now. I originally thought i would be able to concentrate on building bigger and better hydroxy cells, but now i am having to learn how to make vehicles work with the gas instead. I am spread pretty thin and my brain hurts. I dont have access to shop manuals to poor over so i am asking for input from those of you who already know this stuff.

These are the things i need to understand: 1) Octane Adjust Plug 4.6L
2) Intake Air Temp Sensor- does it cause the ecu to richen mix when colder?
3)maf sensor 4) oxygen sensor or any other sensor that can effect fuel economy. Once again thanks in advance for your help.
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Old 10-18-2008, 10:17 PM   #4 (permalink)
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The octane bar is in the wiring harness and is a little black piece of plastic the is used to advance the timing once removed it retards it about 3-5 degrees.Give me the year and engine and I will get your answers for the questions at the bottom of your post.Saw you at the show in Ruskin.Had the Grand Marq with smackbooster.
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