DENSO's A/F Sensors
Posted: Thu Jan 03, 2019 12:45 am
@ has mentioned a less-narrow oxygen sensor, Denso calls these "A/F Sensors" which measures A/F ratios from approximately 12:1 to 19:1
http://www.denso-am.eu/media/102388/dels14-0001.pdf
@ do you know any part numbers or how to distinguish Zirconia from A/F Sensor from Titania Sensors?
http://www.denso-am.eu/media/102388/dels14-0001.pdf
Same page shows output values.Q9: What is the difference between Zirconia Lambda
Sensors and A/F Sensors?
A: In general A/F Sensors are more sensitive and efficient than
conventional Zirconia Lambda Sensors. This is because of the way
each type of Sensor measures the air/fuel ratio, and the different
output signals they produce to indicate the result:
Air/fuel ratio
> A Zirconia Sensor indicates whether the air/fuel ratio is either
above or below Lambda 1.00. The engine ECU alters the fuel
quantity step by step until the Sensor indicates that the mixture
is wrong again. At this point the ECU starts correcting again,
step by step in the other direction. This method results in a
relatively slow and constant ongoing correction around Lambda
1.00, never able to exactly maintain Lambda 1.00.
> An A/F Sensor indicates the exact air/fuel ratio value. This
means that the engine ECU knows how far off the air/fuel ratio
is from Lambda 1.00, and therefore also knows how much it
needs to correct the fuel injection. This allows the engine ECU
to correct the injected fuel quantity to achieve, and maintain
Lambda 1.00 almost immediately.
@ do you know any part numbers or how to distinguish Zirconia from A/F Sensor from Titania Sensors?