Lambda-Sensor with Y2O3-Stabilized ZrO2-Ceramic for Application in Automotive Emission Control Systems 770401

A description of a closed loop fuel metering system was given in the SAE-Paper “Closed Loop Exhaust Emission Control System with Electronic Fuel Injection” (3). The component of paramount importance in the control system is the Lambda-Sensor, about which has been reported in the SAE-Paper “Ceramic Aspects of the Bosch Lambda-Sensor” (5).
The paper reports on the work recently done for optimizing the Lambda-Sensor. As a result of this work the sensor of the latest design is an Y2O3-stabilized ZrO2-sensor whose temperature response is 150 °C lower and whose time of response in the CVS-test is the half. Generally, experimental work has been concentrated on improvement of
  • thermal, mechanical stability and resistivity against exhaust
  • operating temperature range
  • response speed
  • working life
The results are given in this paper.


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