My twist on the same song...

All O2 sensors are Lambda sensors. Whether their output is converted to AFR for whatever reason is another matter. Since we are talking about narrow bands - it might be simpler to think of them as Stoich detectors. The narrow band will produce an output of approximately 450mV when it sees a stoich condition. Stoich is always 1.0 Lambda regardless of the fuel blend. However, AFR at stoich can differ based on the fuel blend. Whatever fuel blend you are burning, rich or lean is in reference to stoich (or Lambda).

The ECU doesn't know AFR etc. It knows voltages. So the ECU changes the controlled variable (in this case fuel) to produce an average around it's set point. In the case of the older strategy that would be 14.6 (which is defined by the CLB table to be approximately 450mV - assuming it's not been monkied with). That 450mV occurs at an AFR on 14.68 with regular gas and at 14.1 with a 10% blend. So, fuel blend doesn't matter because it's automatically compensated for. Say your system can run closed loop with AFR's other than 14.6. Say you want a cell to run at 14.3. First that number is for regular gas. To produce the same level of enriching (% of Lambda), you'd want a 10% blend to run at an AFR of 13.73 (assuming I did the math right). In either case (blend), the voltage produced by the O2 sensor would be the same (~790mV). That's the voltage that the ECU would try to maintain - assuming the cell is set to 14.3.

Based on my understanding/what I've read... the purpose of heating the O2 sensors is so that they can be used much sooner. You don't have to idle/run the bike for a while to heat the sensors up. This makes the EPA happier. I haven't seen any information that suggest that heating the O2 sensors increases their band of accuracy. But then again... what do I know? If you have such information - point me to it. I'd be interested in reading it.

 

[QUOTE=T^2;16691008

Based on my understanding/what I've read... the purpose of heating the O2 sensors is so that they can be used much sooner. You don't have to idle/run the bike for a while to heat the sensors up. This makes the EPA happier. I haven't seen any information that suggest that heating the O2 sensors increases their band of accuracy. But then again... what do I know? If you have such information - point me to it. I'd be interested in reading it.[/QUOTE]

I would point you to a link to where I downloaded the info but I can't seem to find it today. I found some Delphi training documents at one point.

One titled "O2 Sensor operation" has the following about Zirconia O2 sensors:

"At temperatures below 572F (300 C) the difference between rich and lean voltages diminishes rapidly."

 

wouldn't the fact that '14 and up models can run in closed loop between 14.2 - 15.0 compared to '13 and earlier that run closed loop at only 14.6 show that they have a broader range?

 

Hello! New to here. Some interesting results
V&H Short shots VS RSD Track 2 into 1 with 2017 Stage 4 kit.




2013 XL1200X 48

Cheers.

 

Stage 1 vs Stage 4 - nice boost in HP and Torque. Your stage one was similar to my dyno stage 1 result. Thanks for sharing.