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Ceramic Aspects of the Bosch Lambda-Sensor
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Abstract
The Λ-sensor is used within the scope of the Bosch emission control system, representing a closed control loop. In principle, it is an oxygen concentration cell with an oxygen ion-conducting solid electrolyte which provides a sharp voltage step at the stoichiometric air-fuel ratio, serving as a control signal. Zirconia ceramic stabilized with certain metal oxides is used as the solid electrolyte. The electrical and mechanical properties of the ceramic depend, above all, on the type and concentration of the stabilizing oxide and on the manufacturing conditions. Using ceramic materials which are described, sensors can be produced that make possible exact control of the stoichiometric A/F in a temperature range of 300/400-900°C. The lifetime of the sensor, which depends on the operating conditions, can be taken as about 15,000 miles of driving distance. With this sensor, exhaust emissions can be kept below the limits specified for 1977-1978 in the United States.
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Dueker, H., Friese, K., and Haecker, W., "Ceramic Aspects of the Bosch Lambda-Sensor," SAE Technical Paper 750223, 1975, https://doi.org/10.4271/750223.Also In
References
- Zechnall R. Baumann G. MTZ 34 7 1973
- Zechnall R. Baumann G. Eisele H. Paper 730566 SAE National Automobile Engineering Meeting Detroit May 1973
- Düker H. Neidhard H. Second Automotive Emission Conf. Ann Arbor 1973
- Tien T. Y. Subbarao E. C. J. Chem. Phys. 39 4 1973 1041 1047
- Tien T. Y. J. Am. Ceram. Soc 47 432 1964
- Srivastava K. K. Patil R. N. Choudhary C. B. Gokhale K. V. G. K. Subbarao E. C. Trans, and J. Brit. Ceram. Soc. 73 3 1974 85 91
- Duwez P. Odell F. Brown F. H. J. Am. Ceram. Soc. 35 5 1952 109
- Viechnicki D. Stubican V. S. J. Am. Ceram. Soc. 48 292 1965
- Friese K. H. Neidhard H. Pollner R. Topp B. DOS No. 2311165 September 12 1974
- Steinke L. Weyl H. DOS No. 2315444 October 10 1974
- Brook R. J. Peltzmann W. L. Kröger F. A. J. Electrochem. Soc. 118 185 1971
- Fleming W. J. Howarth D. S. Eddy D. S. Paper 730575 SAE National Automobile Engineering Meeting Detroit May 1973
- Ullmann H. Z. Chem. 65 1967