Wideband zirconia sensor Oxygen sensor

a planar wideband zirconia sensor (schematic picture)

a variation on zirconia sensor, called wideband sensor, introduced ntk in 1992 , has been used car engine management systems in order meet ever-increasing demands better fuel economy, lower emissions , better engine performance @ same time. based on planar zirconia element, incorporates electrochemical gas pump. electronic circuit containing feedback loop controls gas pump current keep output of electrochemical cell constant, pump current directly indicates oxygen content of exhaust gas. sensor eliminates lean-rich cycling inherent in narrow-band sensors, allowing control unit adjust fuel delivery , ignition timing of engine more rapidly. in automotive industry sensor called uego (for universal exhaust gas oxygen) sensor. uego sensors commonly used in aftermarket dyno tuning , high-performance driver air-fuel display equipment. wideband zirconia sensor used in stratified fuel injection systems, , can used in diesel engines satisfy upcoming euro , ulev emission limits.

wideband sensors have 3 elements:

the wiring diagram wideband sensor typically has 6 wires:

^ citation: yamada, t., hayakawa, n., kami, y., , kawai, t., universal air-fuel ratio heated exhaust gas oxygen sensor , further applications , sae technical paper 920234, 1992, doi:10.4271/920234.
^ recent car utilising lean-burn or direct-injection engine technology uses wideband sensor , info lambdapower.co.uk