Wideband Oxygen Sensor (Lab Notes)

This page has been moved from Internetscooters lab and now need to be refined for general use

http://www.vespalabs.org/@api/deki/pages/74

WBo 2 2J1

The Oxygen Sensor is back on the agenda after getting a display http://wbo2.com/la1/default.htm

1st June 2009 update... the info below is a bit all over the place. Here's a summary... the Oxygen Sensor rocks!

Blurb From Website

Tech Edge 2J1 Features

- Accuracy within + - 0.1 AFR

Differential WB lin
- Uses new Bosch LSU 4.2
WB lin
Auto-cal
NB sim
2 analogue
RPM input
PULSE input
10.5 to 19.5
- Free logging software

Fitting the Sensor

The Bosch LSU 7200 is classed as a broadband sensor (not as good as a wideband but better than a narrowband). Some info from Bosch can be found in Bosch_The_Modern_Oxygen_Sensor.pdf Bosch_lsu_info.pdf

The first problem is the positioning of the sensor so it has the right running temperature. Techedge state " It’s possible to locate a sensor 300 mm (12”) from a single cylinder runner pipe (such as on an air-cooled motorbike) lsuinstal.pdf

I gave Techedge a call and the 300mm is only a rough guess, which is a good rule of thumb for general purpose. It is more importantant chose a safe spot around that location with a preference to the sensor avoiding damage. THe sensor should not exceed it's 700C operating temperature. Note: The sensor would only be fitted for carb tuning and not used all the time, so a cooler spoy requiring battery power to keep it heated is not an issue.