o2 sensor requirements with rs-enthalpy ecu

[1988montecarloss]

when running an rs-enthalpy modified ecu and a wideband o2 sensor (aem uego) can i run just the wideband sensor and run the signal wire to the correct pin in the ecu? or do i have to run a standard narrowband into the ecu and just have the wideband powered on to monitor my AFR's?

[KAT-PWR]

AEM has the signal output option, you just have to put it in the right mode via the dial that is in the back of the gauge, it's small and a bitch, you need like a really small jewelers flat head

[jedi03]

I would say ask martin...I think it should be fine

[Kingtal0n]

1. you can run a narrowband, any narrowband

2. you can send an analog output from the wideband to simulate the narrowband

3. you should have both, the narrowband helps confirm the wideband is at least calibrated around 14.7:1, and neither feed the ECU anything because you have the car in open loop to command an 15.2:1 cruise air fuel ratio and dont want to risk burning out the wideband output unless you absolutely have to, i.e. the open loop is too unstable so the user defined input for wideband output voltage resolution becoming a tuning tool, for example: the engine idle is radical the air fuel jumps quickly from 14.6 to 15.8 and you want to command this as an air fuel ratio for closed loop, focusing on 15.2:1 you would program something like [15.0 @ 1.004volts ; 15.5 @ 0.004volts] simulating the narrowband for any ECU.

[cotbu]

Yes you can simulate the narrow band signal on an enthalpy tuned ecu.



3. you should have both, the narrowband helps confirm the wideband is at least calibrated around 14.7:1, and neither feed the ECU anything because you have the car in open loop to command an 15.2:1 cruise air fuel ratio and dont want to risk burning out the wideband output unless you absolutely have to, i.e. the open loop is too unstable so the user defined input for wideband output voltage resolution becoming a tuning tool, for example: the engine idle is radical the air fuel jumps quickly from 14.6 to 15.8 and you want to command this as an air fuel ratio for closed loop, focusing on 15.2:1 you would program something like [15.0 @ 1.004volts ; 15.5 @ 0.004volts] simulating the narrowband for any ECU.

That's not how I would do it, but...
Just use the voltage the sensor is calibrated with, aem 0.00v is usually 10.0 or rich 4.99v is usually 19.98 or lean for gasoline.
So I would target the voltages.

It probably just my understanding, but making my own voltages for a Afr is not how I would do it. [emoji56]

[Kingtal0n]

Yes you can simulate the narrow band signal on an enthalpy tuned ecu.




That's not how I would do it, but...
Just use the voltage the sensor is calibrated with, aem 0.00v is usually 10.0 or rich 4.99v is usually 19.98 or lean for gasoline.
So I would target the voltages.

It probably just my understanding, but making my own voltages for a Afr is not how I would do it. [emoji56]

You cant use any more than 1 volt for the narrowband input to the ECU. The ECU only recognizes 0volts or 1volts, thats it.

You are referring to the linear output of the wideband sensor to the gauge or other logging devices, not the simulated narrowband signal. The linearized 0-5volts output has to do with data-logging, not closed loop.

[cotbu]

It was an example of the voltage strategy I would use, I would change the switching points, to keep the 15.2afr.

We are talking about narrow band simulation here...

I'm sure you know, that I know how a stock ecu uses an 02sensor.

How did the uego become so popular anyway?

[1988montecarloss]

2. you can send an analog output from the wideband to simulate the narrowband



is that basically what switching the dial on the back of the afr gauge does?



3. you should have both, the narrowband helps confirm the wideband is at least calibrated around 14.7:1, and neither feed the ECU anything because you have the car in open loop to command an 15.2:1 cruise air fuel ratio and dont want to risk burning out the wideband output unless you absolutely have to, i.e. the open loop is too unstable so the user defined input for wideband output voltage resolution becoming a tuning tool, for example: the engine idle is radical the air fuel jumps quickly from 14.6 to 15.8 and you want to command this as an air fuel ratio for closed loop, focusing on 15.2:1 you would program something like [15.0 @ 1.004volts ; 15.5 @ 0.004volts] simulating the narrowband for any ECU.

i will run both eventually when i can get another bung welded in but just have the wideband right now, will the car run closed loop sometimes with just the wideband or will it still be open loop all the time? and how do i calibrate the wideband?

[KAT-PWR]

Set the gauge to mode 4
Run line to ecu
Done

[1988montecarloss]

I would say ask martin...I think it should be fine

yeah i will give him a call once i get the car going again, need some sidefeed 550cc first :hs:

It was an example of the voltage strategy I would use, I would change the switching points, to keep the 15.2afr.

We are talking about narrow band simulation here...

I'm sure you know, that I know how a stock ecu uses an 02sensor.

How did the uego become so popular anyway?

probably because its the cheapest :keke:

[1988montecarloss]

Set the gauge to mode 4
Run line to ecu
Done

awesome, thanks!

[Kingtal0n]

is that basically what switching the dial on the back of the afr gauge does?




i will run both eventually when i can get another bung welded in but just have the wideband right now, will the car run closed loop sometimes with just the wideband or will it still be open loop all the time? and how do i calibrate the wideband?

iirc, the switches are for using different fuels.

You have to read the manual, every wideband is different. Some AEM for example have only one, NON configurable Narrowband simulated output, whereas the LC-1 Innovative has TWO configurable analog outputs (you hook a laptop to it and adjust the output however you want), one for simulating a narrowband and one for data logging if you want, or whatever.

ECU use 0-1v for closed loop, whereas dataloggers typically use 0-5v for datalogging. The reason we sometimes adjust the output analog voltages sometimes is because ECU have a minimum step size for adjusting closed loop pulsewidth, and when using larger than stock injectors, the step size can become so large that the engine will stall. If you have a stand-alone you can raise the minimum RPM requirement for closed loop, but on a stock ECU you cannot do that on the fly so adjusting analog outputs is one way to keep the closed loop (in case a real narrowband won't work because of the step size in pulsewidth)

[1988montecarloss]

Set the gauge to mode 4
Run line to ecu
Done

is mode 4 turned all the way clockwise? or with the other side of the slot pointed at position four?

http://i.imgur.com/rm25mHP.png

[KAT-PWR]

If you have the gauge on you can watch the display and it will tell you. I'm really not sure, that is by far the worst part about aem wide bands. Be very careful turning it. I broke one on a gauge and AEM was 0 help.