[Lambda] Output WideBand Voltage

[Ale_ET]

Hi, I'm Alessio and I'm new in this forum.

I'm working on our Formula SAE engine, the Aprilia 550 RXV.
Now we're testing the engine on test bench but we've a problem.
We use PerfectPower WBC Lambda meter + Bosch 17014 (I think it's Bosch LSU 4.2 <STRIKE>4.9</STRIKE>) to valuate the lambda value.
The lambda meter output voltage is 0 - 5 volt (0 - 255 bit) and I must assign in a lambda correspondance table at every bit/voltage, one lambda value (or AFR).
On the PerfectPower website is reported "Linear 0-5 Volt output reporting AFR".
Can I use a linear trend from 9.6 AFR to 20 AFR or a typical Bosch 4.x trend (not linear)?
Someone know WBC meter?

Thank you very much.

Best regards,

[Ale_ET]

Hi, I'm Alessio and I'm new in this forum.

I'm working on our Formula SAE engine, the Aprilia 550 RXV.
Now we're testing the engine on test bench but we've a problem.
We use PerfectPower WBC Lambda meter + Bosch 17014 (I think it's Bosch LSU 4.2 <STRIKE>4.9</STRIKE>) to valuate the lambda value.
The lambda meter output voltage is 0 - 5 volt (0 - 255 bit) and I must assign in a lambda correspondance table at every bit/voltage, one lambda value (or AFR).
On the PerfectPower website is reported "Linear 0-5 Volt output reporting AFR".
Can I use a linear trend from 9.6 AFR to 20 AFR or a typical Bosch 4.x trend (not linear)?
Someone know WBC meter?

Thank you very much.

Best regards,

[jeremy@fitinjection.com]

The meter converts the wb signal to a linear voltage output as it states. Same applies to almost all wideband meters. The wideband sensor itself doesn't quite output a voltage type signal as a normal narrowband sensor does, and the meter has the electronics to control it and output a completely separate signal representing lambda.