Wideband vs Narroband Fuel Ratio Sensors

Basics

• In modern computer contolled engines, an oxgen sensor in the intake, and exhaust (post engine, and often post scrubbers/catalitic converters etc) to give feedback data on the fuel to air ratio
• This is useful for efficiency, but is also critical for the operation of a tri-action catalytic converter, as the ratio must be switched between rich, and standard to cycle between chemical reaction "modes"

External Links

• An article on the subject