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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