Abstract
The growing demands to reduce polluting emissions from motor vehicles can be satisfied only by using new concepts of engine management. These concepts require new chemosensors for their implementation. Their center piece is a new lambda probe for the improved monitoring of idling operation or cylinder fluctuations. Sensors are also required for monitoring catalytic converters and regulating the catalytic reactions of nitrogen oxides in the exhaust from Diesel engines. At Siemens, research is being pursued into new sensors for these applications. The sensors are based on the effect of the gases on the electrical conductivity of semiconducting metal oxides. The latter can be manufactured as a thin film by reactive sputtering, thus allowing their easy integration into microsensor systems. In addition to the fast lambda probe for cylinder-selective measurement, research is being focused on sensors for hydrocarbons, nitrogen oxides and ammonia. The laboratory investigations have led to the discovery of suitable metal oxides for detecting the relevant gases. Prototypes of the fast lambda probe with a response time of less than 10 ms and a constant operating temperature up to 1000°C have been successfully tested on engine test benches.
Similar content being viewed by others
References
Becker K (1993) Konzeption für die künftigen Europäische Abgasvorschriften bei Kraftfahrzeugen. VDI-Fortschrittsberichte, Reihe 12, Band 182 (Teil 1), S 126
Abthoff J, Loose G (1984) Katalytische Abgasreinigung von Ottomotoren; Daimler-Benz AG, Forschung und Entwicklung
Gerblinger J, Meixner H (1990) J Appl Phys 67:7453
Müller A (1988) Untersuchung von Diffusionsvorgängen in resistiven Sauerstoffsensoren. Fortschrittsberichte-Berichte VDI, Vol 15, No 54. VDI, Düsseldorf
Gerblinger J (1991) Sauerstoffsensoren auf der Basis gesputterter Strontiumtitanat-Schichten. Thesis, University of Karlsruhe
Gerblinger J, Meixner H (1991) Sensors Actuators B 4:99
Lampe U, Kornely S, Hanrieder W, Meixner H (1991) Fast exhaustgas sensors für cylinder selective lambda measurement. Proc 24th ISATA, Florence, Italy, May 20–24th, pp 147
Lampe U, Gerblinger J, Meixner H (1993) Lambda-Detection with thin film metal oxides using synthetic exhaust gas mixtures. Contribution to the EUROSENSOR VII, Budapest (accepted)
Lampe U, Gerblinger J, Meixner H (1992) Sensors Actuators B 7:787
Fleischer M, Meixner H (1992) Sensors Actuators B 5:115
Fleischer M (1992) Präparation and Charakterisierung von Ga2O3-Dünnschichten. Untersuchung der gassensitiven elektrischen Leitfähigkeitseigenschaften. Thesis, TU München
Fleischer M, Meixner H (1992) Sensors Actuators B 6:257
Lampe U, Fleischer M, Meixner H (1993) Sensors Actuators (in press)
Hanrieder W, Scholz A, Meixner H (1991) Surface Sci 243:166
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Meixner, H., Lampe, U., Gerblinger, J. et al. Chemosensors for motor management systems of the future. Fresenius J Anal Chem 348, 536–541 (1994). https://doi.org/10.1007/BF00323926
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00323926