Output voltage O2 sensor
03-30-04, 01:51 AM
#1
Output voltage O2 sensor
What is the voltage range of the Stock O2 sensor??
I am going to get an LM-1 Wide band sensor that has an output option that allows you to have a voltage output for AFR gauges and ECU input..
I currently have an Auto meter AFR and found out that
Lean Range Four red LED’s (.050 to .249V)
Stoichiometric Range Ten yellow LED’s (.250 to .749V)
Rich Range Six green LED’s (.750 to 1.000V)
If the stock is from 0V- 5V this would explain why the AFR gauge always bounced around....
the wideband is going in with 2 x 720cc injectors and a Black S-AFC 2
I am going to get an LM-1 Wide band sensor that has an output option that allows you to have a voltage output for AFR gauges and ECU input..
I currently have an Auto meter AFR and found out that
Lean Range Four red LED’s (.050 to .249V)
Stoichiometric Range Ten yellow LED’s (.250 to .749V)
Rich Range Six green LED’s (.750 to 1.000V)
If the stock is from 0V- 5V this would explain why the AFR gauge always bounced around....
the wideband is going in with 2 x 720cc injectors and a Black S-AFC 2
03-30-04, 04:11 AM
#4
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All narrow-band O2 sensors are 0-1V, including ours.
An the A/F gauge is supposed to bounce around. If you don't understand what you're seeing, a wide-band isn't going to be any use to you.
An the A/F gauge is supposed to bounce around. If you don't understand what you're seeing, a wide-band isn't going to be any use to you.
03-30-04, 08:31 AM
#5
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****If you don't understand what you're seeing, a wide-band isn't going to be any use to you*****
Everyone has to start somewhere. It wouldn't hurt to read the AutoMeter article on 02 sensors though.
Everyone has to start somewhere. It wouldn't hurt to read the AutoMeter article on 02 sensors though.
03-30-04, 08:45 AM
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It'd be nice to see a graph of AFR in relation to voltage for the stock O2 sensor. One thing I do know is the LM1 only has 2 points in which to specify voltage to AFR. I'm unsure if it makes a sweep or only outputs three values on the simulated narrowband output.
One of the reasons I'm holding off on buying a WBO2 sensor is that specific reason. I need something that ACCURATELY mimics a narrowband O2 sensor so I can just use my LT-8 datalogging more effectively.
One of the reasons I'm holding off on buying a WBO2 sensor is that specific reason. I need something that ACCURATELY mimics a narrowband O2 sensor so I can just use my LT-8 datalogging more effectively.
03-30-04, 10:19 AM
#7
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****It'd be nice to see a graph of AFR in relation to voltage for the stock O2 sensor****
I don't think that is possible since the narrow band is soo inaccurate at anything other than stoic. If it were not inacurrate at other than stoic....then we wouldn't be buying wideband monitors. You've got a long wait, from my understanding of narrow band sensors. I could be wrong. Don't think so though.
I don't think that is possible since the narrow band is soo inaccurate at anything other than stoic. If it were not inacurrate at other than stoic....then we wouldn't be buying wideband monitors. You've got a long wait, from my understanding of narrow band sensors. I could be wrong. Don't think so though.
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03-30-04, 04:12 PM
#8
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Originally posted by Josepi
It'd be nice to see a graph of AFR in relation to voltage for the stock O2 sensor.
It'd be nice to see a graph of AFR in relation to voltage for the stock O2 sensor.
You can see how the sensor clearly shows whether the mixture is above or below stoichiometric (which is all the ECU wants to know), but isn't very good once you too far from that point.
Lots of good info on O2 sensors in this article. Everyone should read and learn.
03-30-04, 04:22 PM
#9
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Originally posted by NZConvertible
Ask and you shall receive.
**huge pic**
You can see how the sensor clearly shows whether the mixture is above or below stoichiometric (which is all the ECU wants to know), but isn't very good once you too far from that point.
Lots of good info on O2 sensors in this article. Everyone should read and learn.
Ask and you shall receive.
**huge pic**
You can see how the sensor clearly shows whether the mixture is above or below stoichiometric (which is all the ECU wants to know), but isn't very good once you too far from that point.
Lots of good info on O2 sensors in this article. Everyone should read and learn.
Guessing this is why my current narrowband input on my LT-8 reads either 13.7 or 14.5
...I have seen it dip into the 12.x region!
03-31-04, 12:35 AM
#10
the idea i had was to use the wide band and replace the narrow band (stock) and use the output of the LM1 to place the corresponding voltage for begining and ending values with the Bosch sensor 11027 output levels to the ECU with
0.05V @ 1.2 Lambda
and
0.95V @ 0.8 Lambda
it will not correspond to the graph shown in this post but would rather be a straight line from either points on the graph...
found Bosch 11027 outputs here
http://www.buckeyetriumphs.org/techn.../AFMonitor.htm
0.05V @ 1.2 Lambda
and
0.95V @ 0.8 Lambda
it will not correspond to the graph shown in this post but would rather be a straight line from either points on the graph...
found Bosch 11027 outputs here
http://www.buckeyetriumphs.org/techn.../AFMonitor.htm
Last edited by mr_vaughn; 03-31-04 at 12:37 AM.
03-31-04, 08:12 AM
#11
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About that graph..........IMHO/IMDO, that shows how useless the narrow band is.
Watching a wideband, while the stock ECU controls a virtual stock 87 turboii, the stock ECU will make the afr go way down in the low 10 range under full throttle. You ain't a gonna see that with a narrow band. Trends...yes. Accuracy, no.
I'm not into trendy things. I watched a digital meter in lieu of a afr meter for a couple of years. Ain't a gonna go backwards no more.
The TechEdge 2.0 wideband will deliver a simulated 02 sensor signal to the ECU if you arrange it to do so. It's an option of the device along with logging. http://wbo2.com/:
Watching a wideband, while the stock ECU controls a virtual stock 87 turboii, the stock ECU will make the afr go way down in the low 10 range under full throttle. You ain't a gonna see that with a narrow band. Trends...yes. Accuracy, no.
I'm not into trendy things. I watched a digital meter in lieu of a afr meter for a couple of years. Ain't a gonna go backwards no more.
The TechEdge 2.0 wideband will deliver a simulated 02 sensor signal to the ECU if you arrange it to do so. It's an option of the device along with logging. http://wbo2.com/:
Last edited by HAILERS; 03-31-04 at 08:15 AM.
03-31-04, 03:29 PM
#12
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Originally posted by HAILERS
About that graph..........IMHO/IMDO, that shows how useless the narrow band is.
About that graph..........IMHO/IMDO, that shows how useless the narrow band is.
Last edited by NZConvertible; 03-31-04 at 03:33 PM.
03-31-04, 07:00 PM
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by that graph, and the graph that came with my defi' meter....
when the guage says lean, you're definately lean,
and when it says rich, you're definately rich,
and any other point on the graph, the ECU doesn't have a clue what the AFR is.
when the guage says lean, you're definately lean,
and when it says rich, you're definately rich,
and any other point on the graph, the ECU doesn't have a clue what the AFR is.
03-31-04, 10:55 PM
#14
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Originally posted by fstrnyou
...any other point on the graph, the ECU doesn't have a clue what the AFR is.
...any other point on the graph, the ECU doesn't have a clue what the AFR is.
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